java/awt/Component.java

/*
 * Copyright (c) 1995, 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package java.awt;

import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Vector;
import java.util.Locale;
import java.util.EventListener;
import java.util.Iterator;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Collections;
import java.awt.peer.ComponentPeer;
import java.awt.peer.ContainerPeer;
import java.awt.peer.LightweightPeer;
import java.awt.image.BufferStrategy;
import java.awt.image.ImageObserver;
import java.awt.image.ImageProducer;
import java.awt.image.ColorModel;
import java.awt.image.VolatileImage;
import java.awt.event.*;
import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import java.io.IOException;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.beans.Transient;
import java.awt.event.InputMethodListener;
import java.awt.event.InputMethodEvent;
import java.awt.im.InputContext;
import java.awt.im.InputMethodRequests;
import java.awt.dnd.DropTarget;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.AccessControlContext;
import javax.accessibility.*;
import java.applet.Applet;

import sun.security.action.GetPropertyAction;
import sun.awt.AppContext;
import sun.awt.AWTAccessor;
import sun.awt.ConstrainableGraphics;
import sun.awt.SubRegionShowable;
import sun.awt.SunToolkit;
import sun.awt.WindowClosingListener;
import sun.awt.CausedFocusEvent;
import sun.awt.EmbeddedFrame;
import sun.awt.dnd.SunDropTargetEvent;
import sun.awt.im.CompositionArea;
import sun.font.FontManager;
import sun.font.FontManagerFactory;
import sun.font.SunFontManager;
import sun.java2d.SunGraphics2D;
import sun.java2d.pipe.Region;
import sun.awt.image.VSyncedBSManager;
import sun.java2d.pipe.hw.ExtendedBufferCapabilities;
import static sun.java2d.pipe.hw.ExtendedBufferCapabilities.VSyncType.*;
import sun.awt.RequestFocusController;
import sun.java2d.SunGraphicsEnvironment;
import sun.util.logging.PlatformLogger;

/**
 * A <em>component</em> is an object having a graphical representation
 * that can be displayed on the screen and that can interact with the
 * user. Examples of components are the buttons, checkboxes, and scrollbars
 * of a typical graphical user interface. <p>
 * The <code>Component</code> class is the abstract superclass of
 * the nonmenu-related Abstract Window Toolkit components. Class
 * <code>Component</code> can also be extended directly to create a
 * lightweight component. A lightweight component is a component that is
 * not associated with a native window. On the contrary, a heavyweight
 * component is associated with a native window. The {@link #isLightweight()}
 * method may be used to distinguish between the two kinds of the components.
 * <p>
 * Lightweight and heavyweight components may be mixed in a single component
 * hierarchy. However, for correct operating of such a mixed hierarchy of
 * components, the whole hierarchy must be valid. When the hierarchy gets
 * invalidated, like after changing the bounds of components, or
 * adding/removing components to/from containers, the whole hierarchy must be
 * validated afterwards by means of the {@link Container#validate()} method
 * invoked on the top-most invalid container of the hierarchy.
 * <p>
 * <h3>Serialization</h3>
 * It is important to note that only AWT listeners which conform
 * to the <code>Serializable</code> protocol will be saved when
 * the object is stored.  If an AWT object has listeners that
 * aren't marked serializable, they will be dropped at
 * <code>writeObject</code> time.  Developers will need, as always,
 * to consider the implications of making an object serializable.
 * One situation to watch out for is this:
 * <pre>
 *    import java.awt.*;
 *    import java.awt.event.*;
 *    import java.io.Serializable;
 *
 *    class MyApp implements ActionListener, Serializable
 *    {
 *        BigObjectThatShouldNotBeSerializedWithAButton bigOne;
 *        Button aButton = new Button();
 *
 *        MyApp()
 *        {
 *            // Oops, now aButton has a listener with a reference
 *            // to bigOne!
 *            aButton.addActionListener(this);
 *        }
 *
 *        public void actionPerformed(ActionEvent e)
 *        {
 *            System.out.println("Hello There");
 *        }
 *    }
 * </pre>
 * In this example, serializing <code>aButton</code> by itself
 * will cause <code>MyApp</code> and everything it refers to
 * to be serialized as well.  The problem is that the listener
 * is serializable by coincidence, not by design.  To separate
 * the decisions about <code>MyApp</code> and the
 * <code>ActionListener</code> being serializable one can use a
 * nested class, as in the following example:
 * <pre>
 *    import java.awt.*;
 *    import java.awt.event.*;
 *    import java.io.Serializable;
 *
 *    class MyApp java.io.Serializable
 *    {
 *         BigObjectThatShouldNotBeSerializedWithAButton bigOne;
 *         Button aButton = new Button();
 *
 *         static class MyActionListener implements ActionListener
 *         {
 *             public void actionPerformed(ActionEvent e)
 *             {
 *                 System.out.println("Hello There");
 *             }
 *         }
 *
 *         MyApp()
 *         {
 *             aButton.addActionListener(new MyActionListener());
 *         }
 *    }
 * </pre>
 * <p>
 * <b>Note</b>: For more information on the paint mechanisms utilitized
 * by AWT and Swing, including information on how to write the most
 * efficient painting code, see
 * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
 * <p>
 * For details on the focus subsystem, see
 * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html">
 * How to Use the Focus Subsystem</a>,
 * a section in <em>The Java Tutorial</em>, and the
 * <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
 * for more information.
 *
 * @author      Arthur van Hoff
 * @author      Sami Shaio
 */
public abstract class Component implements ImageObserver, MenuContainer,
                                           Serializable
{

    private static final PlatformLogger log = PlatformLogger.getLogger("java.awt.Component");
    private static final PlatformLogger eventLog = PlatformLogger.getLogger("java.awt.event.Component");
    private static final PlatformLogger focusLog = PlatformLogger.getLogger("java.awt.focus.Component");
    private static final PlatformLogger mixingLog = PlatformLogger.getLogger("java.awt.mixing.Component");

    /**
     * The peer of the component. The peer implements the component's
     * behavior. The peer is set when the <code>Component</code> is
     * added to a container that also is a peer.
     * @see #addNotify
     * @see #removeNotify
     */
    transient ComponentPeer peer;

    /**
     * The parent of the object. It may be <code>null</code>
     * for top-level components.
     * @see #getParent
     */
    transient Container parent;

    /**
     * The <code>AppContext</code> of the component. Applets/Plugin may
     * change the AppContext.
     */
    transient AppContext appContext;

    /**
     * The x position of the component in the parent's coordinate system.
     *
     * @serial
     * @see #getLocation
     */
    int x;

    /**
     * The y position of the component in the parent's coordinate system.
     *
     * @serial
     * @see #getLocation
     */
    int y;

    /**
     * The width of the component.
     *
     * @serial
     * @see #getSize
     */
    int width;

    /**
     * The height of the component.
     *
     * @serial
     * @see #getSize
     */
    int height;

    /**
     * The foreground color for this component.
     * <code>foreground</code> can be <code>null</code>.
     *
     * @serial
     * @see #getForeground
     * @see #setForeground
     */
    Color       foreground;

    /**
     * The background color for this component.
     * <code>background</code> can be <code>null</code>.
     *
     * @serial
     * @see #getBackground
     * @see #setBackground
     */
    Color       background;

    /**
     * The font used by this component.
     * The <code>font</code> can be <code>null</code>.
     *
     * @serial
     * @see #getFont
     * @see #setFont
     */
    Font        font;

    /**
     * The font which the peer is currently using.
     * (<code>null</code> if no peer exists.)
     */
    Font        peerFont;

    /**
     * The cursor displayed when pointer is over this component.
     * This value can be <code>null</code>.
     *
     * @serial
     * @see #getCursor
     * @see #setCursor
     */
    Cursor      cursor;

    /**
     * The locale for the component.
     *
     * @serial
     * @see #getLocale
     * @see #setLocale
     */
    Locale      locale;

    /**
     * A reference to a <code>GraphicsConfiguration</code> object
     * used to describe the characteristics of a graphics
     * destination.
     * This value can be <code>null</code>.
     *
     * @since 1.3
     * @serial
     * @see GraphicsConfiguration
     * @see #getGraphicsConfiguration
     */
    private transient GraphicsConfiguration graphicsConfig = null;

    /**
     * A reference to a <code>BufferStrategy</code> object
     * used to manipulate the buffers on this component.
     *
     * @since 1.4
     * @see java.awt.image.BufferStrategy
     * @see #getBufferStrategy()
     */
    transient BufferStrategy bufferStrategy = null;

    /**
     * True when the object should ignore all repaint events.
     *
     * @since 1.4
     * @serial
     * @see #setIgnoreRepaint
     * @see #getIgnoreRepaint
     */
    boolean ignoreRepaint = false;

    /**
     * True when the object is visible. An object that is not
     * visible is not drawn on the screen.
     *
     * @serial
     * @see #isVisible
     * @see #setVisible
     */
    boolean visible = true;

    /**
     * True when the object is enabled. An object that is not
     * enabled does not interact with the user.
     *
     * @serial
     * @see #isEnabled
     * @see #setEnabled
     */
    boolean enabled = true;

    /**
     * True when the object is valid. An invalid object needs to
     * be layed out. This flag is set to false when the object
     * size is changed.
     *
     * @serial
     * @see #isValid
     * @see #validate
     * @see #invalidate
     */
    private volatile boolean valid = false;

    /**
     * The <code>DropTarget</code> associated with this component.
     *
     * @since 1.2
     * @serial
     * @see #setDropTarget
     * @see #getDropTarget
     */
    DropTarget dropTarget;

    /**
     * @serial
     * @see #add
     */
    Vector popups;

    /**
     * A component's name.
     * This field can be <code>null</code>.
     *
     * @serial
     * @see #getName
     * @see #setName(String)
     */
    private String name;

    /**
     * A bool to determine whether the name has
     * been set explicitly. <code>nameExplicitlySet</code> will
     * be false if the name has not been set and
     * true if it has.
     *
     * @serial
     * @see #getName
     * @see #setName(String)
     */
    private boolean nameExplicitlySet = false;

    /**
     * Indicates whether this Component can be focused.
     *
     * @serial
     * @see #setFocusable
     * @see #isFocusable
     * @since 1.4
     */
    private boolean focusable = true;

    private static final int FOCUS_TRAVERSABLE_UNKNOWN = 0;
    private static final int FOCUS_TRAVERSABLE_DEFAULT = 1;
    private static final int FOCUS_TRAVERSABLE_SET = 2;

    /**
     * Tracks whether this Component is relying on default focus travesability.
     *
     * @serial
     * @since 1.4
     */
    private int isFocusTraversableOverridden = FOCUS_TRAVERSABLE_UNKNOWN;

    /**
     * The focus traversal keys. These keys will generate focus traversal
     * behavior for Components for which focus traversal keys are enabled. If a
     * value of null is specified for a traversal key, this Component inherits
     * that traversal key from its parent. If all ancestors of this Component
     * have null specified for that traversal key, then the current
     * KeyboardFocusManager's default traversal key is used.
     *
     * @serial
     * @see #setFocusTraversalKeys
     * @see #getFocusTraversalKeys
     * @since 1.4
     */
    Set[] focusTraversalKeys;

    private static final String[] focusTraversalKeyPropertyNames = {
        "forwardFocusTraversalKeys",
        "backwardFocusTraversalKeys",
        "upCycleFocusTraversalKeys",
        "downCycleFocusTraversalKeys"
    };

    /**
     * Indicates whether focus traversal keys are enabled for this Component.
     * Components for which focus traversal keys are disabled receive key
     * events for focus traversal keys. Components for which focus traversal
     * keys are enabled do not see these events; instead, the events are
     * automatically converted to traversal operations.
     *
     * @serial
     * @see #setFocusTraversalKeysEnabled
     * @see #getFocusTraversalKeysEnabled
     * @since 1.4
     */
    private boolean focusTraversalKeysEnabled = true;

    /**
     * The locking object for AWT component-tree and layout operations.
     *
     * @see #getTreeLock
     */
    static final Object LOCK = new AWTTreeLock();
    static class AWTTreeLock {}

    /*
     * The component's AccessControlContext.
     */
    private transient volatile AccessControlContext acc =
        AccessController.getContext();

    /**
     * Minimum size.
     * (This field perhaps should have been transient).
     *
     * @serial
     */
    Dimension minSize;

    /**
     * Whether or not setMinimumSize has been invoked with a non-null value.
     */
    boolean minSizeSet;

    /**
     * Preferred size.
     * (This field perhaps should have been transient).
     *
     * @serial
     */
    Dimension prefSize;

    /**
     * Whether or not setPreferredSize has been invoked with a non-null value.
     */
    boolean prefSizeSet;

    /**
     * Maximum size
     *
     * @serial
     */
    Dimension maxSize;

    /**
     * Whether or not setMaximumSize has been invoked with a non-null value.
     */
    boolean maxSizeSet;

    /**
     * The orientation for this component.
     * @see #getComponentOrientation
     * @see #setComponentOrientation
     */
    transient ComponentOrientation componentOrientation
    = ComponentOrientation.UNKNOWN;

    /**
     * <code>newEventsOnly</code> will be true if the event is
     * one of the event types enabled for the component.
     * It will then allow for normal processing to
     * continue.  If it is false the event is passed
     * to the component's parent and up the ancestor
     * tree until the event has been consumed.
     *
     * @serial
     * @see #dispatchEvent
     */
    boolean newEventsOnly = false;
    transient ComponentListener componentListener;
    transient FocusListener focusListener;
    transient HierarchyListener hierarchyListener;
    transient HierarchyBoundsListener hierarchyBoundsListener;
    transient KeyListener keyListener;
    transient MouseListener mouseListener;
    transient MouseMotionListener mouseMotionListener;
    transient MouseWheelListener mouseWheelListener;
    transient InputMethodListener inputMethodListener;

    transient RuntimeException windowClosingException = null;

    /** Internal, constants for serialization */
    final static String actionListenerK = "actionL";
    final static String adjustmentListenerK = "adjustmentL";
    final static String componentListenerK = "componentL";
    final static String containerListenerK = "containerL";
    final static String focusListenerK = "focusL";
    final static String itemListenerK = "itemL";
    final static String keyListenerK = "keyL";
    final static String mouseListenerK = "mouseL";
    final static String mouseMotionListenerK = "mouseMotionL";
    final static String mouseWheelListenerK = "mouseWheelL";
    final static String textListenerK = "textL";
    final static String ownedWindowK = "ownedL";
    final static String windowListenerK = "windowL";
    final static String inputMethodListenerK = "inputMethodL";
    final static String hierarchyListenerK = "hierarchyL";
    final static String hierarchyBoundsListenerK = "hierarchyBoundsL";
    final static String windowStateListenerK = "windowStateL";
    final static String windowFocusListenerK = "windowFocusL";

    /**
     * The <code>eventMask</code> is ONLY set by subclasses via
     * <code>enableEvents</code>.
     * The mask should NOT be set when listeners are registered
     * so that we can distinguish the difference between when
     * listeners request events and subclasses request them.
     * One bit is used to indicate whether input methods are
     * enabled; this bit is set by <code>enableInputMethods</code> and is
     * on by default.
     *
     * @serial
     * @see #enableInputMethods
     * @see AWTEvent
     */
    long eventMask = AWTEvent.INPUT_METHODS_ENABLED_MASK;

    /**
     * Static properties for incremental drawing.
     * @see #imageUpdate
     */
    static boolean isInc;
    static int incRate;
    static {
        /* ensure that the necessary native libraries are loaded */
        Toolkit.loadLibraries();
        /* initialize JNI field and method ids */
        if (!GraphicsEnvironment.isHeadless()) {
            initIDs();
        }

        String s = (String) java.security.AccessController.doPrivileged(
                                                                        new GetPropertyAction("awt.image.incrementaldraw"));
        isInc = (s == null || s.equals("true"));

        s = (String) java.security.AccessController.doPrivileged(
                                                                 new GetPropertyAction("awt.image.redrawrate"));
        incRate = (s != null) ? Integer.parseInt(s) : 100;
    }

    /**
     * Ease-of-use constant for <code>getAlignmentY()</code>.
     * Specifies an alignment to the top of the component.
     * @see     #getAlignmentY
     */
    public static final float TOP_ALIGNMENT = 0.0f;

    /**
     * Ease-of-use constant for <code>getAlignmentY</code> and
     * <code>getAlignmentX</code>. Specifies an alignment to
     * the center of the component
     * @see     #getAlignmentX
     * @see     #getAlignmentY
     */
    public static final float CENTER_ALIGNMENT = 0.5f;

    /**
     * Ease-of-use constant for <code>getAlignmentY</code>.
     * Specifies an alignment to the bottom of the component.
     * @see     #getAlignmentY
     */
    public static final float BOTTOM_ALIGNMENT = 1.0f;

    /**
     * Ease-of-use constant for <code>getAlignmentX</code>.
     * Specifies an alignment to the left side of the component.
     * @see     #getAlignmentX
     */
    public static final float LEFT_ALIGNMENT = 0.0f;

    /**
     * Ease-of-use constant for <code>getAlignmentX</code>.
     * Specifies an alignment to the right side of the component.
     * @see     #getAlignmentX
     */
    public static final float RIGHT_ALIGNMENT = 1.0f;

    /*
     * JDK 1.1 serialVersionUID
     */
    private static final long serialVersionUID = -7644114512714619750L;

    /**
     * If any <code>PropertyChangeListeners</code> have been registered,
     * the <code>changeSupport</code> field describes them.
     *
     * @serial
     * @since 1.2
     * @see #addPropertyChangeListener
     * @see #removePropertyChangeListener
     * @see #firePropertyChange
     */
    private PropertyChangeSupport changeSupport;

    /*
     * In some cases using "this" as an object to synchronize by
     * can lead to a deadlock if client code also uses synchronization
     * by a component object. For every such situation revealed we should
     * consider possibility of replacing "this" with the package private
     * objectLock object introduced below. So far there're 2 issues known:
     * - CR 6708322 (the getName/setName methods);
     * - CR 6608764 (the PropertyChangeListener machinery).
     *
     * Note: this field is considered final, though readObject() prohibits
     * initializing final fields.
     */
    private transient Object objectLock = new Object();
    Object getObjectLock() {
        return objectLock;
    }

    /*
     * Returns the acc this component was constructed with.
     */
    final AccessControlContext getAccessControlContext() {
        if (acc == null) {
            throw new SecurityException("Component is missing AccessControlContext");
        }
        return acc;
    }

    boolean isPacked = false;

    /**
     * Pseudoparameter for direct Geometry API (setLocation, setBounds setSize
     * to signal setBounds what's changing. Should be used under TreeLock.
     * This is only needed due to the inability to change the cross-calling
     * order of public and deprecated methods.
     */
    private int boundsOp = ComponentPeer.DEFAULT_OPERATION;

    /**
     * Enumeration of the common ways the baseline of a component can
     * change as the size changes.  The baseline resize behavior is
     * primarily for layout managers that need to know how the
     * position of the baseline changes as the component size changes.
     * In general the baseline resize behavior will be valid for sizes
     * greater than or equal to the minimum size (the actual minimum
     * size; not a developer specified minimum size).  For sizes
     * smaller than the minimum size the baseline may change in a way
     * other than the baseline resize behavior indicates.  Similarly,
     * as the size approaches <code>Integer.MAX_VALUE</code> and/or
     * <code>Short.MAX_VALUE</code> the baseline may change in a way
     * other than the baseline resize behavior indicates.
     *
     * @see #getBaselineResizeBehavior
     * @see #getBaseline(int,int)
     * @since 1.6
     */
    public enum BaselineResizeBehavior {
        /**
         * Indicates the baseline remains fixed relative to the
         * y-origin.  That is, <code>getBaseline</code> returns
         * the same value regardless of the height or width.  For example, a
         * <code>JLabel</code> containing non-empty text with a
         * vertical alignment of <code>TOP</code> should have a
         * baseline type of <code>CONSTANT_ASCENT</code>.
         */
        CONSTANT_ASCENT,

        /**
         * Indicates the baseline remains fixed relative to the height
         * and does not change as the width is varied.  That is, for
         * any height H the difference between H and
         * <code>getBaseline(w, H)</code> is the same.  For example, a
         * <code>JLabel</code> containing non-empty text with a
         * vertical alignment of <code>BOTTOM</code> should have a
         * baseline type of <code>CONSTANT_DESCENT</code>.
         */
        CONSTANT_DESCENT,

        /**
         * Indicates the baseline remains a fixed distance from
         * the center of the component.  That is, for any height H the
         * difference between <code>getBaseline(w, H)</code> and
         * <code>H / 2</code> is the same (plus or minus one depending upon
         * rounding error).
         * <p>
         * Because of possible rounding errors it is recommended
         * you ask for the baseline with two consecutive heights and use
         * the return value to determine if you need to pad calculations
         * by 1.  The following shows how to calculate the baseline for
         * any height:
         * <pre>
         *   Dimension preferredSize = component.getPreferredSize();
         *   int baseline = getBaseline(preferredSize.width,
         *                              preferredSize.height);
         *   int nextBaseline = getBaseline(preferredSize.width,
         *                                  preferredSize.height + 1);
         *   // Amount to add to height when calculating where baseline
         *   // lands for a particular height:
         *   int padding = 0;
         *   // Where the baseline is relative to the mid point
         *   int baselineOffset = baseline - height / 2;
         *   if (preferredSize.height % 2 == 0 &amp;&amp;
         *       baseline != nextBaseline) {
         *       padding = 1;
         *   }
         *   else if (preferredSize.height % 2 == 1 &amp;&amp;
         *            baseline == nextBaseline) {
         *       baselineOffset--;
         *       padding = 1;
         *   }
         *   // The following calculates where the baseline lands for
         *   // the height z:
         *   int calculatedBaseline = (z + padding) / 2 + baselineOffset;
         * </pre>
         */
        CENTER_OFFSET,

        /**
         * Indicates the baseline resize behavior can not be expressed using
         * any of the other constants.  This may also indicate the baseline
         * varies with the width of the component.  This is also returned
         * by components that do not have a baseline.
         */
        OTHER
    }

    /*
     * The shape set with the applyCompoundShape() method. It uncludes the result
     * of the HW/LW mixing related shape computation. It may also include
     * the user-specified shape of the component.
     * The 'null' value means the component has normal shape (or has no shape at all)
     * and applyCompoundShape() will skip the following shape identical to normal.
     */
    private transient Region compoundShape = null;

    /*
     * Represents the shape of this lightweight component to be cut out from
     * heavyweight components should they intersect. Possible values:
     *    1. null - consider the shape rectangular
     *    2. EMPTY_REGION - nothing gets cut out (children still get cut out)
     *    3. non-empty - this shape gets cut out.
     */
    private transient Region mixingCutoutRegion = null;

    /*
     * Indicates whether addNotify() is complete
     * (i.e. the peer is created).
     */
    private transient boolean isAddNotifyComplete = false;

    /**
     * Should only be used in subclass getBounds to check that part of bounds
     * is actualy changing
     */
    int getBoundsOp() {
        assert Thread.holdsLock(getTreeLock());
        return boundsOp;
    }

    void setBoundsOp(int op) {
        assert Thread.holdsLock(getTreeLock());
        if (op == ComponentPeer.RESET_OPERATION) {
            boundsOp = ComponentPeer.DEFAULT_OPERATION;
        } else
            if (boundsOp == ComponentPeer.DEFAULT_OPERATION) {
                boundsOp = op;
            }
    }

    // Whether this Component has had the background erase flag
    // specified via SunToolkit.disableBackgroundErase(). This is
    // needed in order to make this function work on X11 platforms,
    // where currently there is no chance to interpose on the creation
    // of the peer and therefore the call to XSetBackground.
    transient boolean backgroundEraseDisabled;

    static {
        AWTAccessor.setComponentAccessor(new AWTAccessor.ComponentAccessor() {
            public void setBackgroundEraseDisabled(Component comp, boolean disabled) {
                comp.backgroundEraseDisabled = disabled;
            }
            public boolean getBackgroundEraseDisabled(Component comp) {
                return comp.backgroundEraseDisabled;
            }
            public Rectangle getBounds(Component comp) {
                return new Rectangle(comp.x, comp.y, comp.width, comp.height);
            }
            public void setMixingCutoutShape(Component comp, Shape shape) {
                Region region = shape == null ?  null :
                    Region.getInstance(shape, null);

                synchronized (comp.getTreeLock()) {
                    boolean needShowing = false;
                    boolean needHiding = false;

                    if (!comp.isNonOpaqueForMixing()) {
                        needHiding = true;
                    }

                    comp.mixingCutoutRegion = region;

                    if (!comp.isNonOpaqueForMixing()) {
                        needShowing = true;
                    }

                    if (comp.isMixingNeeded()) {
                        if (needHiding) {
                            comp.mixOnHiding(comp.isLightweight());
                        }
                        if (needShowing) {
                            comp.mixOnShowing();
                        }
                    }
                }
            }

            public void setGraphicsConfiguration(Component comp,
                    GraphicsConfiguration gc)
            {
                comp.setGraphicsConfiguration(gc);
            }
            public boolean requestFocus(Component comp, CausedFocusEvent.Cause cause) {
                return comp.requestFocus(cause);
            }
            public boolean canBeFocusOwner(Component comp) {
                return comp.canBeFocusOwner();
            }

            public boolean isVisible(Component comp) {
                return comp.isVisible_NoClientCode();
            }
            public void setRequestFocusController
                (RequestFocusController requestController)
            {
                 Component.setRequestFocusController(requestController);
            }
            public AppContext getAppContext(Component comp) {
                 return comp.appContext;
            }
            public void setAppContext(Component comp, AppContext appContext) {
                 comp.appContext = appContext;
            }
            public Container getParent(Component comp) {
                return comp.getParent_NoClientCode();
            }
            public void setParent(Component comp, Container parent) {
                comp.parent = parent;
            }
            public void setSize(Component comp, int width, int height) {
                comp.width = width;
                comp.height = height;
            }
            public Point getLocation(Component comp) {
                return comp.location_NoClientCode();
            }
            public void setLocation(Component comp, int x, int y) {
                comp.x = x;
                comp.y = y;
            }
            public boolean isEnabled(Component comp) {
                return comp.isEnabledImpl();
            }
            public boolean isDisplayable(Component comp) {
                return comp.peer != null;
            }
            public Cursor getCursor(Component comp) {
                return comp.getCursor_NoClientCode();
            }
            public ComponentPeer getPeer(Component comp) {
                return comp.peer;
            }
            public void setPeer(Component comp, ComponentPeer peer) {
                comp.peer = peer;
            }
            public boolean isLightweight(Component comp) {
                return (comp.peer instanceof LightweightPeer);
            }
            public boolean getIgnoreRepaint(Component comp) {
                return comp.ignoreRepaint;
            }
            public int getWidth(Component comp) {
                return comp.width;
            }
            public int getHeight(Component comp) {
                return comp.height;
            }
            public int getX(Component comp) {
                return comp.x;
            }
            public int getY(Component comp) {
                return comp.y;
            }
            public Color getForeground(Component comp) {
                return comp.foreground;
            }
            public Color getBackground(Component comp) {
                return comp.background;
            }
            public void setBackground(Component comp, Color background) {
                comp.background = background;
            }
            public Font getFont(Component comp) {
                return comp.getFont_NoClientCode();
            }
            public void processEvent(Component comp, AWTEvent e) {
                comp.processEvent(e);
            }

            public AccessControlContext getAccessControlContext(Component comp) {
                return comp.getAccessControlContext();
            }
        });
    }

    /**
     * Constructs a new component. Class <code>Component</code> can be
     * extended directly to create a lightweight component that does not
     * utilize an opaque native window. A lightweight component must be
     * hosted by a native container somewhere higher up in the component
     * tree (for example, by a <code>Frame</code> object).
     */
    protected Component() {
        appContext = AppContext.getAppContext();
    }

    void initializeFocusTraversalKeys() {
        focusTraversalKeys = new Set[3];
    }

    /**
     * Constructs a name for this component.  Called by <code>getName</code>
     * when the name is <code>null</code>.
     */
    String constructComponentName() {
        return null; // For strict compliance with prior platform versions, a Component
                     // that doesn't set its name should return null from
                     // getName()
     }

     /**
      * Gets the name of the component.
      * @return this component's name
      * @see    #setName
      * @since JDK1.1
      */
     public String getName() {
         if (name == null && !nameExplicitlySet) {
             synchronized(getObjectLock()) {
                 if (name == null && !nameExplicitlySet)
                     name = constructComponentName();
             }
         }
         return name;
     }

     /**
      * Sets the name of the component to the specified string.
      * @param name  the string that is to be this
      *           component's name
      * @see #getName
      * @since JDK1.1
      */
     public void setName(String name) {
         String oldName;
         synchronized(getObjectLock()) {
             oldName = this.name;
             this.name = name;
             nameExplicitlySet = true;
         }
         firePropertyChange("name", oldName, name);
     }

     /**
      * Gets the parent of this component.
      * @return the parent container of this component
      * @since JDK1.0
      */
     public Container getParent() {
         return getParent_NoClientCode();
     }

     // NOTE: This method may be called by privileged threads.
     //       This functionality is implemented in a package-private method
     //       to insure that it cannot be overridden by client subclasses.
     //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
     final Container getParent_NoClientCode() {
         return parent;
     }

     // This method is overriden in the Window class to return null,
     //    because the parent field of the Window object contains
     //    the owner of the window, not its parent.
     Container getContainer() {
         return getParent();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * programs should not directly manipulate peers;
      * replaced by <code>boolean isDisplayable()</code>.
      */
     @Deprecated
     public ComponentPeer getPeer() {
         return peer;
     }

     /**
      * Associate a <code>DropTarget</code> with this component.
      * The <code>Component</code> will receive drops only if it
      * is enabled.
      *
      * @see #isEnabled
      * @param dt The DropTarget
      */

     public synchronized void setDropTarget(DropTarget dt) {
         if (dt == dropTarget || (dropTarget != null && dropTarget.equals(dt)))
             return;

         DropTarget old;

         if ((old = dropTarget) != null) {
             if (peer != null) dropTarget.removeNotify(peer);

             DropTarget t = dropTarget;

             dropTarget = null;

             try {
                 t.setComponent(null);
             } catch (IllegalArgumentException iae) {
                 // ignore it.
             }
         }

         // if we have a new one, and we have a peer, add it!

         if ((dropTarget = dt) != null) {
             try {
                 dropTarget.setComponent(this);
                 if (peer != null) dropTarget.addNotify(peer);
             } catch (IllegalArgumentException iae) {
                 if (old != null) {
                     try {
                         old.setComponent(this);
                         if (peer != null) dropTarget.addNotify(peer);
                     } catch (IllegalArgumentException iae1) {
                         // ignore it!
                     }
                 }
             }
         }
     }

     /**
      * Gets the <code>DropTarget</code> associated with this
      * <code>Component</code>.
      */

     public synchronized DropTarget getDropTarget() { return dropTarget; }

     /**
      * Gets the <code>GraphicsConfiguration</code> associated with this
      * <code>Component</code>.
      * If the <code>Component</code> has not been assigned a specific
      * <code>GraphicsConfiguration</code>,
      * the <code>GraphicsConfiguration</code> of the
      * <code>Component</code> object's top-level container is
      * returned.
      * If the <code>Component</code> has been created, but not yet added
      * to a <code>Container</code>, this method returns <code>null</code>.
      *
      * @return the <code>GraphicsConfiguration</code> used by this
      *          <code>Component</code> or <code>null</code>
      * @since 1.3
      */
     public GraphicsConfiguration getGraphicsConfiguration() {
         synchronized(getTreeLock()) {
             return getGraphicsConfiguration_NoClientCode();
         }
     }

     final GraphicsConfiguration getGraphicsConfiguration_NoClientCode() {
         return graphicsConfig;
     }

     void setGraphicsConfiguration(GraphicsConfiguration gc) {
         synchronized(getTreeLock()) {
             if (updateGraphicsData(gc)) {
                 removeNotify();
                 addNotify();
             }
         }
     }

     boolean updateGraphicsData(GraphicsConfiguration gc) {
         checkTreeLock();

         graphicsConfig = gc;

         ComponentPeer peer = getPeer();
         if (peer != null) {
             return peer.updateGraphicsData(gc);
         }
         return false;
     }

     /**
      * Checks that this component's <code>GraphicsDevice</code>
      * <code>idString</code> matches the string argument.
      */
     void checkGD(String stringID) {
         if (graphicsConfig != null) {
             if (!graphicsConfig.getDevice().getIDstring().equals(stringID)) {
                 throw new IllegalArgumentException(
                                                    "adding a container to a container on a different GraphicsDevice");
             }
         }
     }

     /**
      * Gets this component's locking object (the object that owns the thread
      * synchronization monitor) for AWT component-tree and layout
      * operations.
      * @return this component's locking object
      */
     public final Object getTreeLock() {
         return LOCK;
     }

     final void checkTreeLock() {
         if (!Thread.holdsLock(getTreeLock())) {
             throw new IllegalStateException("This function should be called while holding treeLock");
         }
     }

     /**
      * Gets the toolkit of this component. Note that
      * the frame that contains a component controls which
      * toolkit is used by that component. Therefore if the component
      * is moved from one frame to another, the toolkit it uses may change.
      * @return  the toolkit of this component
      * @since JDK1.0
      */
     public Toolkit getToolkit() {
         return getToolkitImpl();
     }

     /*
      * This is called by the native code, so client code can't
      * be called on the toolkit thread.
      */
     final Toolkit getToolkitImpl() {
         ComponentPeer peer = this.peer;
         if ((peer != null) && ! (peer instanceof LightweightPeer)){
             return peer.getToolkit();
         }
         Container parent = this.parent;
         if (parent != null) {
             return parent.getToolkitImpl();
         }
         return Toolkit.getDefaultToolkit();
     }

     /**
      * Determines whether this component is valid. A component is valid
      * when it is correctly sized and positioned within its parent
      * container and all its children are also valid.
      * In order to account for peers' size requirements, components are invalidated
      * before they are first shown on the screen. By the time the parent container
      * is fully realized, all its components will be valid.
      * @return <code>true</code> if the component is valid, <code>false</code>
      * otherwise
      * @see #validate
      * @see #invalidate
      * @since JDK1.0
      */
     public boolean isValid() {
         return (peer != null) && valid;
     }

     /**
      * Determines whether this component is displayable. A component is
      * displayable when it is connected to a native screen resource.
      * <p>
      * A component is made displayable either when it is added to
      * a displayable containment hierarchy or when its containment
      * hierarchy is made displayable.
      * A containment hierarchy is made displayable when its ancestor
      * window is either packed or made visible.
      * <p>
      * A component is made undisplayable either when it is removed from
      * a displayable containment hierarchy or when its containment hierarchy
      * is made undisplayable.  A containment hierarchy is made
      * undisplayable when its ancestor window is disposed.
      *
      * @return <code>true</code> if the component is displayable,
      * <code>false</code> otherwise
      * @see Container#add(Component)
      * @see Window#pack
      * @see Window#show
      * @see Container#remove(Component)
      * @see Window#dispose
      * @since 1.2
      */
     public boolean isDisplayable() {
         return getPeer() != null;
     }

     /**
      * Determines whether this component should be visible when its
      * parent is visible. Components are
      * initially visible, with the exception of top level components such
      * as <code>Frame</code> objects.
      * @return <code>true</code> if the component is visible,
      * <code>false</code> otherwise
      * @see #setVisible
      * @since JDK1.0
      */
     @Transient
     public boolean isVisible() {
         return isVisible_NoClientCode();
     }
     final boolean isVisible_NoClientCode() {
         return visible;
     }

     /**
      * Determines whether this component will be displayed on the screen.
      * @return <code>true</code> if the component and all of its ancestors
      *          until a toplevel window or null parent are visible,
      *          <code>false</code> otherwise
      */
     boolean isRecursivelyVisible() {
         return visible && (parent == null || parent.isRecursivelyVisible());
     }

     /**
      * Translates absolute coordinates into coordinates in the coordinate
      * space of this component.
      */
     Point pointRelativeToComponent(Point absolute) {
         Point compCoords = getLocationOnScreen();
         return new Point(absolute.x - compCoords.x,
                          absolute.y - compCoords.y);
     }

     /**
      * Assuming that mouse location is stored in PointerInfo passed
      * to this method, it finds a Component that is in the same
      * Window as this Component and is located under the mouse pointer.
      * If no such Component exists, null is returned.
      * NOTE: this method should be called under the protection of
      * tree lock, as it is done in Component.getMousePosition() and
      * Container.getMousePosition(boolean).
      */
     Component findUnderMouseInWindow(PointerInfo pi) {
         if (!isShowing()) {
             return null;
         }
         Window win = getContainingWindow();
         if (!Toolkit.getDefaultToolkit().getMouseInfoPeer().isWindowUnderMouse(win)) {
             return null;
         }
         final boolean INCLUDE_DISABLED = true;
         Point relativeToWindow = win.pointRelativeToComponent(pi.getLocation());
         Component inTheSameWindow = win.findComponentAt(relativeToWindow.x,
                                                         relativeToWindow.y,
                                                         INCLUDE_DISABLED);
         return inTheSameWindow;
     }

     /**
      * Returns the position of the mouse pointer in this <code>Component</code>'s
      * coordinate space if the <code>Component</code> is directly under the mouse
      * pointer, otherwise returns <code>null</code>.
      * If the <code>Component</code> is not showing on the screen, this method
      * returns <code>null</code> even if the mouse pointer is above the area
      * where the <code>Component</code> would be displayed.
      * If the <code>Component</code> is partially or fully obscured by other
      * <code>Component</code>s or native windows, this method returns a non-null
      * value only if the mouse pointer is located above the unobscured part of the
      * <code>Component</code>.
      * <p>
      * For <code>Container</code>s it returns a non-null value if the mouse is
      * above the <code>Container</code> itself or above any of its descendants.
      * Use {@link Container#getMousePosition(boolean)} if you need to exclude children.
      * <p>
      * Sometimes the exact mouse coordinates are not important, and the only thing
      * that matters is whether a specific <code>Component</code> is under the mouse
      * pointer. If the return value of this method is <code>null</code>, mouse
      * pointer is not directly above the <code>Component</code>.
      *
      * @exception HeadlessException if GraphicsEnvironment.isHeadless() returns true
      * @see       #isShowing
      * @see       Container#getMousePosition
      * @return    mouse coordinates relative to this <code>Component</code>, or null
      * @since     1.5
      */
     public Point getMousePosition() throws HeadlessException {
         if (GraphicsEnvironment.isHeadless()) {
             throw new HeadlessException();
         }

         PointerInfo pi = (PointerInfo)java.security.AccessController.doPrivileged(
                                                                                   new java.security.PrivilegedAction() {
                                                                                       public Object run() {
                                                                                           return MouseInfo.getPointerInfo();
                                                                                       }
                                                                                   }
                                                                                   );

         synchronized (getTreeLock()) {
             Component inTheSameWindow = findUnderMouseInWindow(pi);
             if (!isSameOrAncestorOf(inTheSameWindow, true)) {
                 return null;
             }
             return pointRelativeToComponent(pi.getLocation());
         }
     }

     /**
      * Overridden in Container. Must be called under TreeLock.
      */
     boolean isSameOrAncestorOf(Component comp, boolean allowChildren) {
         return comp == this;
     }

     /**
      * Determines whether this component is showing on screen. This means
      * that the component must be visible, and it must be in a container
      * that is visible and showing.
      * <p>
      * <strong>Note:</strong> sometimes there is no way to detect whether the
      * {@code Component} is actually visible to the user.  This can happen when:
      * <ul>
      * <li>the component has been added to a visible {@code ScrollPane} but
      * the {@code Component} is not currently in the scroll pane's view port.
      * <li>the {@code Component} is obscured by another {@code Component} or
      * {@code Container}.
      * </ul>
      * @return <code>true</code> if the component is showing,
      *          <code>false</code> otherwise
      * @see #setVisible
      * @since JDK1.0
      */
     public boolean isShowing() {
         if (visible && (peer != null)) {
             Container parent = this.parent;
             return (parent == null) || parent.isShowing();
         }
         return false;
     }

     /**
      * Determines whether this component is enabled. An enabled component
      * can respond to user input and generate events. Components are
      * enabled initially by default. A component may be enabled or disabled by
      * calling its <code>setEnabled</code> method.
      * @return <code>true</code> if the component is enabled,
      *          <code>false</code> otherwise
      * @see #setEnabled
      * @since JDK1.0
      */
     public boolean isEnabled() {
         return isEnabledImpl();
     }

     /*
      * This is called by the native code, so client code can't
      * be called on the toolkit thread.
      */
     final boolean isEnabledImpl() {
         return enabled;
     }

     /**
      * Enables or disables this component, depending on the value of the
      * parameter <code>b</code>. An enabled component can respond to user
      * input and generate events. Components are enabled initially by default.
      *
      * <p>Note: Disabling a lightweight component does not prevent it from
      * receiving MouseEvents.
      * <p>Note: Disabling a heavyweight container prevents all components
      * in this container from receiving any input events.  But disabling a
      * lightweight container affects only this container.
      *
      * @param     b   If <code>true</code>, this component is
      *            enabled; otherwise this component is disabled
      * @see #isEnabled
      * @see #isLightweight
      * @since JDK1.1
      */
     public void setEnabled(boolean b) {
         enable(b);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setEnabled(boolean)</code>.
      */
     @Deprecated
     public void enable() {
         if (!enabled) {
             synchronized (getTreeLock()) {
                 enabled = true;
                 ComponentPeer peer = this.peer;
                 if (peer != null) {
                     peer.setEnabled(true);
                     if (visible) {
                         updateCursorImmediately();
                     }
                 }
             }
             if (accessibleContext != null) {
                 accessibleContext.firePropertyChange(
                                                      AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                      null, AccessibleState.ENABLED);
             }
         }
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setEnabled(boolean)</code>.
      */
     @Deprecated
     public void enable(boolean b) {
         if (b) {
             enable();
         } else {
             disable();
         }
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setEnabled(boolean)</code>.
      */
     @Deprecated
     public void disable() {
         if (enabled) {
             KeyboardFocusManager.clearMostRecentFocusOwner(this);
             synchronized (getTreeLock()) {
                 enabled = false;
                 // A disabled lw container is allowed to contain a focus owner.
                 if ((isFocusOwner() || (containsFocus() && !isLightweight())) &&
                     KeyboardFocusManager.isAutoFocusTransferEnabled())
                 {
                     // Don't clear the global focus owner. If transferFocus
                     // fails, we want the focus to stay on the disabled
                     // Component so that keyboard traversal, et. al. still
                     // makes sense to the user.
                     transferFocus(false);
                 }
                 ComponentPeer peer = this.peer;
                 if (peer != null) {
                     peer.setEnabled(false);
                     if (visible) {
                         updateCursorImmediately();
                     }
                 }
             }
             if (accessibleContext != null) {
                 accessibleContext.firePropertyChange(
                                                      AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                      null, AccessibleState.ENABLED);
             }
         }
     }

     /**
      * Returns true if this component is painted to an offscreen image
      * ("buffer") that's copied to the screen later.  Component
      * subclasses that support double buffering should override this
      * method to return true if double buffering is enabled.
      *
      * @return false by default
      */
     public boolean isDoubleBuffered() {
         return false;
     }

     /**
      * Enables or disables input method support for this component. If input
      * method support is enabled and the component also processes key events,
      * incoming events are offered to
      * the current input method and will only be processed by the component or
      * dispatched to its listeners if the input method does not consume them.
      * By default, input method support is enabled.
      *
      * @param enable true to enable, false to disable
      * @see #processKeyEvent
      * @since 1.2
      */
     public void enableInputMethods(boolean enable) {
         if (enable) {
             if ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0)
                 return;

             // If this component already has focus, then activate the
             // input method by dispatching a synthesized focus gained
             // event.
             if (isFocusOwner()) {
                 InputContext inputContext = getInputContext();
                 if (inputContext != null) {
                     FocusEvent focusGainedEvent =
                         new FocusEvent(this, FocusEvent.FOCUS_GAINED);
                     inputContext.dispatchEvent(focusGainedEvent);
                 }
             }

             eventMask |= AWTEvent.INPUT_METHODS_ENABLED_MASK;
         } else {
             if ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0) {
                 InputContext inputContext = getInputContext();
                 if (inputContext != null) {
                     inputContext.endComposition();
                     inputContext.removeNotify(this);
                 }
             }
             eventMask &= ~AWTEvent.INPUT_METHODS_ENABLED_MASK;
         }
     }

     /**
      * Shows or hides this component depending on the value of parameter
      * <code>b</code>.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param b  if <code>true</code>, shows this component;
      * otherwise, hides this component
      * @see #isVisible
      * @see #invalidate
      * @since JDK1.1
      */
     public void setVisible(boolean b) {
         show(b);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setVisible(boolean)</code>.
      */
     @Deprecated
     public void show() {
         if (!visible) {
             synchronized (getTreeLock()) {
                 visible = true;
                 mixOnShowing();
                 ComponentPeer peer = this.peer;
                 if (peer != null) {
                     peer.setVisible(true);
                     createHierarchyEvents(HierarchyEvent.HIERARCHY_CHANGED,
                                           this, parent,
                                           HierarchyEvent.SHOWING_CHANGED,
                                           Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK));
                     if (peer instanceof LightweightPeer) {
                         repaint();
                     }
                     updateCursorImmediately();
                 }

                 if (componentListener != null ||
                     (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 ||
                     Toolkit.enabledOnToolkit(AWTEvent.COMPONENT_EVENT_MASK)) {
                     ComponentEvent e = new ComponentEvent(this,
                                                           ComponentEvent.COMPONENT_SHOWN);
                     Toolkit.getEventQueue().postEvent(e);
                 }
             }
             Container parent = this.parent;
             if (parent != null) {
                 parent.invalidate();
             }
         }
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setVisible(boolean)</code>.
      */
     @Deprecated
     public void show(boolean b) {
         if (b) {
             show();
         } else {
             hide();
         }
     }

     boolean containsFocus() {
         return isFocusOwner();
     }

     void clearMostRecentFocusOwnerOnHide() {
         KeyboardFocusManager.clearMostRecentFocusOwner(this);
     }

     void clearCurrentFocusCycleRootOnHide() {
         /* do nothing */
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setVisible(boolean)</code>.
      */
     @Deprecated
     public void hide() {
         isPacked = false;

         if (visible) {
             clearCurrentFocusCycleRootOnHide();
             clearMostRecentFocusOwnerOnHide();
             synchronized (getTreeLock()) {
                 visible = false;
                 mixOnHiding(isLightweight());
                 if (containsFocus() && KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                     transferFocus(true);
                 }
                 ComponentPeer peer = this.peer;
                 if (peer != null) {
                     peer.setVisible(false);
                     createHierarchyEvents(HierarchyEvent.HIERARCHY_CHANGED,
                                           this, parent,
                                           HierarchyEvent.SHOWING_CHANGED,
                                           Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK));
                     if (peer instanceof LightweightPeer) {
                         repaint();
                     }
                     updateCursorImmediately();
                 }
                 if (componentListener != null ||
                     (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 ||
                     Toolkit.enabledOnToolkit(AWTEvent.COMPONENT_EVENT_MASK)) {
                     ComponentEvent e = new ComponentEvent(this,
                                                           ComponentEvent.COMPONENT_HIDDEN);
                     Toolkit.getEventQueue().postEvent(e);
                 }
             }
             Container parent = this.parent;
             if (parent != null) {
                 parent.invalidate();
             }
         }
     }

     /**
      * Gets the foreground color of this component.
      * @return this component's foreground color; if this component does
      * not have a foreground color, the foreground color of its parent
      * is returned
      * @see #setForeground
      * @since JDK1.0
      * @beaninfo
      *       bound: true
      */
     @Transient
     public Color getForeground() {
         Color foreground = this.foreground;
         if (foreground != null) {
             return foreground;
         }
         Container parent = this.parent;
         return (parent != null) ? parent.getForeground() : null;
     }

     /**
      * Sets the foreground color of this component.
      * @param c the color to become this component's
      *          foreground color; if this parameter is <code>null</code>
      *          then this component will inherit
      *          the foreground color of its parent
      * @see #getForeground
      * @since JDK1.0
      */
     public void setForeground(Color c) {
         Color oldColor = foreground;
         ComponentPeer peer = this.peer;
         foreground = c;
         if (peer != null) {
             c = getForeground();
             if (c != null) {
                 peer.setForeground(c);
             }
         }
         // This is a bound property, so report the change to
         // any registered listeners.  (Cheap if there are none.)
         firePropertyChange("foreground", oldColor, c);
     }

     /**
      * Returns whether the foreground color has been explicitly set for this
      * Component. If this method returns <code>false</code>, this Component is
      * inheriting its foreground color from an ancestor.
      *
      * @return <code>true</code> if the foreground color has been explicitly
      *         set for this Component; <code>false</code> otherwise.
      * @since 1.4
      */
     public boolean isForegroundSet() {
         return (foreground != null);
     }

     /**
      * Gets the background color of this component.
      * @return this component's background color; if this component does
      *          not have a background color,
      *          the background color of its parent is returned
      * @see #setBackground
      * @since JDK1.0
      */
     @Transient
     public Color getBackground() {
         Color background = this.background;
         if (background != null) {
             return background;
         }
         Container parent = this.parent;
         return (parent != null) ? parent.getBackground() : null;
     }

     /**
      * Sets the background color of this component.
      * <p>
      * The background color affects each component differently and the
      * parts of the component that are affected by the background color
      * may differ between operating systems.
      *
      * @param c the color to become this component's color;
      *          if this parameter is <code>null</code>, then this
      *          component will inherit the background color of its parent
      * @see #getBackground
      * @since JDK1.0
      * @beaninfo
      *       bound: true
      */
     public void setBackground(Color c) {
         Color oldColor = background;
         ComponentPeer peer = this.peer;
         background = c;
         if (peer != null) {
             c = getBackground();
             if (c != null) {
                 peer.setBackground(c);
             }
         }
         // This is a bound property, so report the change to
         // any registered listeners.  (Cheap if there are none.)
         firePropertyChange("background", oldColor, c);
     }

     /**
      * Returns whether the background color has been explicitly set for this
      * Component. If this method returns <code>false</code>, this Component is
      * inheriting its background color from an ancestor.
      *
      * @return <code>true</code> if the background color has been explicitly
      *         set for this Component; <code>false</code> otherwise.
      * @since 1.4
      */
     public boolean isBackgroundSet() {
         return (background != null);
     }

     /**
      * Gets the font of this component.
      * @return this component's font; if a font has not been set
      * for this component, the font of its parent is returned
      * @see #setFont
      * @since JDK1.0
      */
     @Transient
     public Font getFont() {
         return getFont_NoClientCode();
     }

     // NOTE: This method may be called by privileged threads.
     //       This functionality is implemented in a package-private method
     //       to insure that it cannot be overridden by client subclasses.
     //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
     final Font getFont_NoClientCode() {
         Font font = this.font;
         if (font != null) {
             return font;
         }
         Container parent = this.parent;
         return (parent != null) ? parent.getFont_NoClientCode() : null;
     }

     /**
      * Sets the font of this component.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param f the font to become this component's font;
      *          if this parameter is <code>null</code> then this
      *          component will inherit the font of its parent
      * @see #getFont
      * @see #invalidate
      * @since JDK1.0
      * @beaninfo
      *       bound: true
      */
     public void setFont(Font f) {
         Font oldFont, newFont;
         synchronized(getTreeLock()) {
             synchronized (this) {
                 oldFont = font;
                 newFont = font = f;
             }
             ComponentPeer peer = this.peer;
             if (peer != null) {
                 f = getFont();
                 if (f != null) {
                     peer.setFont(f);
                     peerFont = f;
                 }
             }
         }
         // This is a bound property, so report the change to
         // any registered listeners.  (Cheap if there are none.)
         firePropertyChange("font", oldFont, newFont);

         // This could change the preferred size of the Component.
         // Fix for 6213660. Should compare old and new fonts and do not
         // call invalidate() if they are equal.
         if (f != oldFont && (oldFont == null ||
                                       !oldFont.equals(f))) {
             invalidateIfValid();
         }
     }

     /**
      * Returns whether the font has been explicitly set for this Component. If
      * this method returns <code>false</code>, this Component is inheriting its
      * font from an ancestor.
      *
      * @return <code>true</code> if the font has been explicitly set for this
      *         Component; <code>false</code> otherwise.
      * @since 1.4
      */
     public boolean isFontSet() {
         return (font != null);
     }

     /**
      * Gets the locale of this component.
      * @return this component's locale; if this component does not
      *          have a locale, the locale of its parent is returned
      * @see #setLocale
      * @exception IllegalComponentStateException if the <code>Component</code>
      *          does not have its own locale and has not yet been added to
      *          a containment hierarchy such that the locale can be determined
      *          from the containing parent
      * @since  JDK1.1
      */
     public Locale getLocale() {
         Locale locale = this.locale;
         if (locale != null) {
             return locale;
         }
         Container parent = this.parent;

         if (parent == null) {
             throw new IllegalComponentStateException("This component must have a parent in order to determine its locale");
         } else {
             return parent.getLocale();
         }
     }

     /**
      * Sets the locale of this component.  This is a bound property.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param l the locale to become this component's locale
      * @see #getLocale
      * @see #invalidate
      * @since JDK1.1
      */
     public void setLocale(Locale l) {
         Locale oldValue = locale;
         locale = l;

         // This is a bound property, so report the change to
         // any registered listeners.  (Cheap if there are none.)
         firePropertyChange("locale", oldValue, l);

         // This could change the preferred size of the Component.
         invalidateIfValid();
     }

     /**
      * Gets the instance of <code>ColorModel</code> used to display
      * the component on the output device.
      * @return the color model used by this component
      * @see java.awt.image.ColorModel
      * @see java.awt.peer.ComponentPeer#getColorModel()
      * @see Toolkit#getColorModel()
      * @since JDK1.0
      */
     public ColorModel getColorModel() {
         ComponentPeer peer = this.peer;
         if ((peer != null) && ! (peer instanceof LightweightPeer)) {
             return peer.getColorModel();
         } else if (GraphicsEnvironment.isHeadless()) {
             return ColorModel.getRGBdefault();
         } // else
         return getToolkit().getColorModel();
     }

     /**
      * Gets the location of this component in the form of a
      * point specifying the component's top-left corner.
      * The location will be relative to the parent's coordinate space.
      * <p>
      * Due to the asynchronous nature of native event handling, this
      * method can return outdated values (for instance, after several calls
      * of <code>setLocation()</code> in rapid succession).  For this
      * reason, the recommended method of obtaining a component's position is
      * within <code>java.awt.event.ComponentListener.componentMoved()</code>,
      * which is called after the operating system has finished moving the
      * component.
      * </p>
      * @return an instance of <code>Point</code> representing
      *          the top-left corner of the component's bounds in
      *          the coordinate space of the component's parent
      * @see #setLocation
      * @see #getLocationOnScreen
      * @since JDK1.1
      */
     public Point getLocation() {
         return location();
     }

     /**
      * Gets the location of this component in the form of a point
      * specifying the component's top-left corner in the screen's
      * coordinate space.
      * @return an instance of <code>Point</code> representing
      *          the top-left corner of the component's bounds in the
      *          coordinate space of the screen
      * @throws <code>IllegalComponentStateException</code> if the
      *          component is not showing on the screen
      * @see #setLocation
      * @see #getLocation
      */
     public Point getLocationOnScreen() {
         synchronized (getTreeLock()) {
             return getLocationOnScreen_NoTreeLock();
         }
     }

     /*
      * a package private version of getLocationOnScreen
      * used by GlobalCursormanager to update cursor
      */
     final Point getLocationOnScreen_NoTreeLock() {

         if (peer != null && isShowing()) {
             if (peer instanceof LightweightPeer) {
                 // lightweight component location needs to be translated
                 // relative to a native component.
                 Container host = getNativeContainer();
                 Point pt = host.peer.getLocationOnScreen();
                 for(Component c = this; c != host; c = c.getParent()) {
                     pt.x += c.x;
                     pt.y += c.y;
                 }
                 return pt;
             } else {
                 Point pt = peer.getLocationOnScreen();
                 return pt;
             }
         } else {
             throw new IllegalComponentStateException("component must be showing on the screen to determine its location");
         }
     }


     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>getLocation()</code>.
      */
     @Deprecated
     public Point location() {
         return location_NoClientCode();
     }

     private Point location_NoClientCode() {
         return new Point(x, y);
     }

     /**
      * Moves this component to a new location. The top-left corner of
      * the new location is specified by the <code>x</code> and <code>y</code>
      * parameters in the coordinate space of this component's parent.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param x the <i>x</i>-coordinate of the new location's
      *          top-left corner in the parent's coordinate space
      * @param y the <i>y</i>-coordinate of the new location's
      *          top-left corner in the parent's coordinate space
      * @see #getLocation
      * @see #setBounds
      * @see #invalidate
      * @since JDK1.1
      */
     public void setLocation(int x, int y) {
         move(x, y);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setLocation(int, int)</code>.
      */
     @Deprecated
     public void move(int x, int y) {
         synchronized(getTreeLock()) {
             setBoundsOp(ComponentPeer.SET_LOCATION);
             setBounds(x, y, width, height);
         }
     }

     /**
      * Moves this component to a new location. The top-left corner of
      * the new location is specified by point <code>p</code>. Point
      * <code>p</code> is given in the parent's coordinate space.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param p the point defining the top-left corner
      *          of the new location, given in the coordinate space of this
      *          component's parent
      * @see #getLocation
      * @see #setBounds
      * @see #invalidate
      * @since JDK1.1
      */
     public void setLocation(Point p) {
         setLocation(p.x, p.y);
     }

     /**
      * Returns the size of this component in the form of a
      * <code>Dimension</code> object. The <code>height</code>
      * field of the <code>Dimension</code> object contains
      * this component's height, and the <code>width</code>
      * field of the <code>Dimension</code> object contains
      * this component's width.
      * @return a <code>Dimension</code> object that indicates the
      *          size of this component
      * @see #setSize
      * @since JDK1.1
      */
     public Dimension getSize() {
         return size();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>getSize()</code>.
      */
     @Deprecated
     public Dimension size() {
         return new Dimension(width, height);
     }

     /**
      * Resizes this component so that it has width <code>width</code>
      * and height <code>height</code>.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param width the new width of this component in pixels
      * @param height the new height of this component in pixels
      * @see #getSize
      * @see #setBounds
      * @see #invalidate
      * @since JDK1.1
      */
     public void setSize(int width, int height) {
         resize(width, height);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setSize(int, int)</code>.
      */
     @Deprecated
     public void resize(int width, int height) {
         synchronized(getTreeLock()) {
             setBoundsOp(ComponentPeer.SET_SIZE);
             setBounds(x, y, width, height);
         }
     }

     /**
      * Resizes this component so that it has width <code>d.width</code>
      * and height <code>d.height</code>.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param d the dimension specifying the new size
      *          of this component
      * @throws NullPointerException if {@code d} is {@code null}
      * @see #setSize
      * @see #setBounds
      * @see #invalidate
      * @since JDK1.1
      */
     public void setSize(Dimension d) {
         resize(d);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setSize(Dimension)</code>.
      */
     @Deprecated
     public void resize(Dimension d) {
         setSize(d.width, d.height);
     }

     /**
      * Gets the bounds of this component in the form of a
      * <code>Rectangle</code> object. The bounds specify this
      * component's width, height, and location relative to
      * its parent.
      * @return a rectangle indicating this component's bounds
      * @see #setBounds
      * @see #getLocation
      * @see #getSize
      */
     public Rectangle getBounds() {
         return bounds();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>getBounds()</code>.
      */
     @Deprecated
     public Rectangle bounds() {
         return new Rectangle(x, y, width, height);
     }

     /**
      * Moves and resizes this component. The new location of the top-left
      * corner is specified by <code>x</code> and <code>y</code>, and the
      * new size is specified by <code>width</code> and <code>height</code>.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param x the new <i>x</i>-coordinate of this component
      * @param y the new <i>y</i>-coordinate of this component
      * @param width the new <code>width</code> of this component
      * @param height the new <code>height</code> of this
      *          component
      * @see #getBounds
      * @see #setLocation(int, int)
      * @see #setLocation(Point)
      * @see #setSize(int, int)
      * @see #setSize(Dimension)
      * @see #invalidate
      * @since JDK1.1
      */
     public void setBounds(int x, int y, int width, int height) {
         reshape(x, y, width, height);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>setBounds(int, int, int, int)</code>.
      */
     @Deprecated
     public void reshape(int x, int y, int width, int height) {
         synchronized (getTreeLock()) {
             try {
                 setBoundsOp(ComponentPeer.SET_BOUNDS);
                 boolean resized = (this.width != width) || (this.height != height);
                 boolean moved = (this.x != x) || (this.y != y);
                 if (!resized && !moved) {
                     return;
                 }
                 int oldX = this.x;
                 int oldY = this.y;
                 int oldWidth = this.width;
                 int oldHeight = this.height;
                 this.x = x;
                 this.y = y;
                 this.width = width;
                 this.height = height;

                 if (resized) {
                     isPacked = false;
                 }

                 boolean needNotify = true;
                 mixOnReshaping();
                 if (peer != null) {
                     // LightwightPeer is an empty stub so can skip peer.reshape
                     if (!(peer instanceof LightweightPeer)) {
                         reshapeNativePeer(x, y, width, height, getBoundsOp());
                         // Check peer actualy changed coordinates
                         resized = (oldWidth != this.width) || (oldHeight != this.height);
                         moved = (oldX != this.x) || (oldY != this.y);
                         // fix for 5025858: do not send ComponentEvents for toplevel
                         // windows here as it is done from peer or native code when
                         // the window is really resized or moved, otherwise some
                         // events may be sent twice
                         if (this instanceof Window) {
                             needNotify = false;
                         }
                     }
                     if (resized) {
                         invalidate();
                     }
                     if (parent != null) {
                         parent.invalidateIfValid();
                     }
                 }
                 if (needNotify) {
                     notifyNewBounds(resized, moved);
                 }
                 repaintParentIfNeeded(oldX, oldY, oldWidth, oldHeight);
             } finally {
                 setBoundsOp(ComponentPeer.RESET_OPERATION);
             }
         }
     }

     private void repaintParentIfNeeded(int oldX, int oldY, int oldWidth,
                                        int oldHeight)
     {
         if (parent != null && peer instanceof LightweightPeer && isShowing()) {
             // Have the parent redraw the area this component occupied.
             parent.repaint(oldX, oldY, oldWidth, oldHeight);
             // Have the parent redraw the area this component *now* occupies.
             repaint();
         }
     }

     private void reshapeNativePeer(int x, int y, int width, int height, int op) {
         // native peer might be offset by more than direct
         // parent since parent might be lightweight.
         int nativeX = x;
         int nativeY = y;
         for (Component c = parent;
              (c != null) && (c.peer instanceof LightweightPeer);
              c = c.parent)
         {
             nativeX += c.x;
             nativeY += c.y;
         }
         peer.setBounds(nativeX, nativeY, width, height, op);
     }


     private void notifyNewBounds(boolean resized, boolean moved) {
         if (componentListener != null
             || (eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0
             || Toolkit.enabledOnToolkit(AWTEvent.COMPONENT_EVENT_MASK))
             {
                 if (resized) {
                     ComponentEvent e = new ComponentEvent(this,
                                                           ComponentEvent.COMPONENT_RESIZED);
                     Toolkit.getEventQueue().postEvent(e);
                 }
                 if (moved) {
                     ComponentEvent e = new ComponentEvent(this,
                                                           ComponentEvent.COMPONENT_MOVED);
                     Toolkit.getEventQueue().postEvent(e);
                 }
             } else {
                 if (this instanceof Container && ((Container)this).countComponents() > 0) {
                     boolean enabledOnToolkit =
                         Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK);
                     if (resized) {

                         ((Container)this).createChildHierarchyEvents(
                                                                      HierarchyEvent.ANCESTOR_RESIZED, 0, enabledOnToolkit);
                     }
                     if (moved) {
                         ((Container)this).createChildHierarchyEvents(
                                                                      HierarchyEvent.ANCESTOR_MOVED, 0, enabledOnToolkit);
                     }
                 }
                 }
     }

     /**
      * Moves and resizes this component to conform to the new
      * bounding rectangle <code>r</code>. This component's new
      * position is specified by <code>r.x</code> and <code>r.y</code>,
      * and its new size is specified by <code>r.width</code> and
      * <code>r.height</code>
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @param r the new bounding rectangle for this component
      * @throws NullPointerException if {@code r} is {@code null}
      * @see       #getBounds
      * @see       #setLocation(int, int)
      * @see       #setLocation(Point)
      * @see       #setSize(int, int)
      * @see       #setSize(Dimension)
      * @see #invalidate
      * @since     JDK1.1
      */
     public void setBounds(Rectangle r) {
         setBounds(r.x, r.y, r.width, r.height);
     }


     /**
      * Returns the current x coordinate of the components origin.
      * This method is preferable to writing
      * <code>component.getBounds().x</code>,
      * or <code>component.getLocation().x</code> because it doesn't
      * cause any heap allocations.
      *
      * @return the current x coordinate of the components origin
      * @since 1.2
      */
     public int getX() {
         return x;
     }


     /**
      * Returns the current y coordinate of the components origin.
      * This method is preferable to writing
      * <code>component.getBounds().y</code>,
      * or <code>component.getLocation().y</code> because it
      * doesn't cause any heap allocations.
      *
      * @return the current y coordinate of the components origin
      * @since 1.2
      */
     public int getY() {
         return y;
     }


     /**
      * Returns the current width of this component.
      * This method is preferable to writing
      * <code>component.getBounds().width</code>,
      * or <code>component.getSize().width</code> because it
      * doesn't cause any heap allocations.
      *
      * @return the current width of this component
      * @since 1.2
      */
     public int getWidth() {
         return width;
     }


     /**
      * Returns the current height of this component.
      * This method is preferable to writing
      * <code>component.getBounds().height</code>,
      * or <code>component.getSize().height</code> because it
      * doesn't cause any heap allocations.
      *
      * @return the current height of this component
      * @since 1.2
      */
     public int getHeight() {
         return height;
     }

     /**
      * Stores the bounds of this component into "return value" <b>rv</b> and
      * return <b>rv</b>.  If rv is <code>null</code> a new
      * <code>Rectangle</code> is allocated.
      * This version of <code>getBounds</code> is useful if the caller
      * wants to avoid allocating a new <code>Rectangle</code> object
      * on the heap.
      *
      * @param rv the return value, modified to the components bounds
      * @return rv
      */
     public Rectangle getBounds(Rectangle rv) {
         if (rv == null) {
             return new Rectangle(getX(), getY(), getWidth(), getHeight());
         }
         else {
             rv.setBounds(getX(), getY(), getWidth(), getHeight());
             return rv;
         }
     }

     /**
      * Stores the width/height of this component into "return value" <b>rv</b>
      * and return <b>rv</b>.   If rv is <code>null</code> a new
      * <code>Dimension</code> object is allocated.  This version of
      * <code>getSize</code> is useful if the caller wants to avoid
      * allocating a new <code>Dimension</code> object on the heap.
      *
      * @param rv the return value, modified to the components size
      * @return rv
      */
     public Dimension getSize(Dimension rv) {
         if (rv == null) {
             return new Dimension(getWidth(), getHeight());
         }
         else {
             rv.setSize(getWidth(), getHeight());
             return rv;
         }
     }

     /**
      * Stores the x,y origin of this component into "return value" <b>rv</b>
      * and return <b>rv</b>.   If rv is <code>null</code> a new
      * <code>Point</code> is allocated.
      * This version of <code>getLocation</code> is useful if the
      * caller wants to avoid allocating a new <code>Point</code>
      * object on the heap.
      *
      * @param rv the return value, modified to the components location
      * @return rv
      */
     public Point getLocation(Point rv) {
         if (rv == null) {
             return new Point(getX(), getY());
         }
         else {
             rv.setLocation(getX(), getY());
             return rv;
         }
     }

     /**
      * Returns true if this component is completely opaque, returns
      * false by default.
      * <p>
      * An opaque component paints every pixel within its
      * rectangular region. A non-opaque component paints only some of
      * its pixels, allowing the pixels underneath it to "show through".
      * A component that does not fully paint its pixels therefore
      * provides a degree of transparency.
      * <p>
      * Subclasses that guarantee to always completely paint their
      * contents should override this method and return true.
      *
      * @return true if this component is completely opaque
      * @see #isLightweight
      * @since 1.2
      */
     public boolean isOpaque() {
         if (getPeer() == null) {
             return false;
         }
         else {
             return !isLightweight();
         }
     }


     /**
      * A lightweight component doesn't have a native toolkit peer.
      * Subclasses of <code>Component</code> and <code>Container</code>,
      * other than the ones defined in this package like <code>Button</code>
      * or <code>Scrollbar</code>, are lightweight.
      * All of the Swing components are lightweights.
      * <p>
      * This method will always return <code>false</code> if this component
      * is not displayable because it is impossible to determine the
      * weight of an undisplayable component.
      *
      * @return true if this component has a lightweight peer; false if
      *         it has a native peer or no peer
      * @see #isDisplayable
      * @since 1.2
      */
     public boolean isLightweight() {
         return getPeer() instanceof LightweightPeer;
     }


     /**
      * Sets the preferred size of this component to a constant
      * value.  Subsequent calls to <code>getPreferredSize</code> will always
      * return this value.  Setting the preferred size to <code>null</code>
      * restores the default behavior.
      *
      * @param preferredSize The new preferred size, or null
      * @see #getPreferredSize
      * @see #isPreferredSizeSet
      * @since 1.5
      */
     public void setPreferredSize(Dimension preferredSize) {
         Dimension old;
         // If the preferred size was set, use it as the old value, otherwise
         // use null to indicate we didn't previously have a set preferred
         // size.
         if (prefSizeSet) {
             old = this.prefSize;
         }
         else {
             old = null;
         }
         this.prefSize = preferredSize;
         prefSizeSet = (preferredSize != null);
         firePropertyChange("preferredSize", old, preferredSize);
     }


     /**
      * Returns true if the preferred size has been set to a
      * non-<code>null</code> value otherwise returns false.
      *
      * @return true if <code>setPreferredSize</code> has been invoked
      *         with a non-null value.
      * @since 1.5
      */
     public boolean isPreferredSizeSet() {
         return prefSizeSet;
     }


     /**
      * Gets the preferred size of this component.
      * @return a dimension object indicating this component's preferred size
      * @see #getMinimumSize
      * @see LayoutManager
      */
     public Dimension getPreferredSize() {
         return preferredSize();
     }


     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>getPreferredSize()</code>.
      */
     @Deprecated
     public Dimension preferredSize() {
         /* Avoid grabbing the lock if a reasonable cached size value
          * is available.
          */
         Dimension dim = prefSize;
         if (dim == null || !(isPreferredSizeSet() || isValid())) {
             synchronized (getTreeLock()) {
                 prefSize = (peer != null) ?
                     peer.getPreferredSize() :
                     getMinimumSize();
                 dim = prefSize;
             }
         }
         return new Dimension(dim);
     }

     /**
      * Sets the minimum size of this component to a constant
      * value.  Subsequent calls to <code>getMinimumSize</code> will always
      * return this value.  Setting the minimum size to <code>null</code>
      * restores the default behavior.
      *
      * @param minimumSize the new minimum size of this component
      * @see #getMinimumSize
      * @see #isMinimumSizeSet
      * @since 1.5
      */
     public void setMinimumSize(Dimension minimumSize) {
         Dimension old;
         // If the minimum size was set, use it as the old value, otherwise
         // use null to indicate we didn't previously have a set minimum
         // size.
         if (minSizeSet) {
             old = this.minSize;
         }
         else {
             old = null;
         }
         this.minSize = minimumSize;
         minSizeSet = (minimumSize != null);
         firePropertyChange("minimumSize", old, minimumSize);
     }

     /**
      * Returns whether or not <code>setMinimumSize</code> has been
      * invoked with a non-null value.
      *
      * @return true if <code>setMinimumSize</code> has been invoked with a
      *              non-null value.
      * @since 1.5
      */
     public boolean isMinimumSizeSet() {
         return minSizeSet;
     }

     /**
      * Gets the mininimum size of this component.
      * @return a dimension object indicating this component's minimum size
      * @see #getPreferredSize
      * @see LayoutManager
      */
     public Dimension getMinimumSize() {
         return minimumSize();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>getMinimumSize()</code>.
      */
     @Deprecated
     public Dimension minimumSize() {
         /* Avoid grabbing the lock if a reasonable cached size value
          * is available.
          */
         Dimension dim = minSize;
         if (dim == null || !(isMinimumSizeSet() || isValid())) {
             synchronized (getTreeLock()) {
                 minSize = (peer != null) ?
                     peer.getMinimumSize() :
                     size();
                 dim = minSize;
             }
         }
         return new Dimension(dim);
     }

     /**
      * Sets the maximum size of this component to a constant
      * value.  Subsequent calls to <code>getMaximumSize</code> will always
      * return this value.  Setting the maximum size to <code>null</code>
      * restores the default behavior.
      *
      * @param maximumSize a <code>Dimension</code> containing the
      *          desired maximum allowable size
      * @see #getMaximumSize
      * @see #isMaximumSizeSet
      * @since 1.5
      */
     public void setMaximumSize(Dimension maximumSize) {
         // If the maximum size was set, use it as the old value, otherwise
         // use null to indicate we didn't previously have a set maximum
         // size.
         Dimension old;
         if (maxSizeSet) {
             old = this.maxSize;
         }
         else {
             old = null;
         }
         this.maxSize = maximumSize;
         maxSizeSet = (maximumSize != null);
         firePropertyChange("maximumSize", old, maximumSize);
     }

     /**
      * Returns true if the maximum size has been set to a non-<code>null</code>
      * value otherwise returns false.
      *
      * @return true if <code>maximumSize</code> is non-<code>null</code>,
      *          false otherwise
      * @since 1.5
      */
     public boolean isMaximumSizeSet() {
         return maxSizeSet;
     }

     /**
      * Gets the maximum size of this component.
      * @return a dimension object indicating this component's maximum size
      * @see #getMinimumSize
      * @see #getPreferredSize
      * @see LayoutManager
      */
     public Dimension getMaximumSize() {
         if (isMaximumSizeSet()) {
             return new Dimension(maxSize);
         }
         return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
     }

     /**
      * Returns the alignment along the x axis.  This specifies how
      * the component would like to be aligned relative to other
      * components.  The value should be a number between 0 and 1
      * where 0 represents alignment along the origin, 1 is aligned
      * the furthest away from the origin, 0.5 is centered, etc.
      */
     public float getAlignmentX() {
         return CENTER_ALIGNMENT;
     }

     /**
      * Returns the alignment along the y axis.  This specifies how
      * the component would like to be aligned relative to other
      * components.  The value should be a number between 0 and 1
      * where 0 represents alignment along the origin, 1 is aligned
      * the furthest away from the origin, 0.5 is centered, etc.
      */
     public float getAlignmentY() {
         return CENTER_ALIGNMENT;
     }

     /**
      * Returns the baseline.  The baseline is measured from the top of
      * the component.  This method is primarily meant for
      * <code>LayoutManager</code>s to align components along their
      * baseline.  A return value less than 0 indicates this component
      * does not have a reasonable baseline and that
      * <code>LayoutManager</code>s should not align this component on
      * its baseline.
      * <p>
      * The default implementation returns -1.  Subclasses that support
      * baseline should override appropriately.  If a value &gt;= 0 is
      * returned, then the component has a valid baseline for any
      * size &gt;= the minimum size and <code>getBaselineResizeBehavior</code>
      * can be used to determine how the baseline changes with size.
      *
      * @param width the width to get the baseline for
      * @param height the height to get the baseline for
      * @return the baseline or &lt; 0 indicating there is no reasonable
      *         baseline
      * @throws IllegalArgumentException if width or height is &lt; 0
      * @see #getBaselineResizeBehavior
      * @see java.awt.FontMetrics
      * @since 1.6
      */
     public int getBaseline(int width, int height) {
         if (width < 0 || height < 0) {
             throw new IllegalArgumentException(
                     "Width and height must be >= 0");
         }
         return -1;
     }

     /**
      * Returns an enum indicating how the baseline of the component
      * changes as the size changes.  This method is primarily meant for
      * layout managers and GUI builders.
      * <p>
      * The default implementation returns
      * <code>BaselineResizeBehavior.OTHER</code>.  Subclasses that have a
      * baseline should override appropriately.  Subclasses should
      * never return <code>null</code>; if the baseline can not be
      * calculated return <code>BaselineResizeBehavior.OTHER</code>.  Callers
      * should first ask for the baseline using
      * <code>getBaseline</code> and if a value &gt;= 0 is returned use
      * this method.  It is acceptable for this method to return a
      * value other than <code>BaselineResizeBehavior.OTHER</code> even if
      * <code>getBaseline</code> returns a value less than 0.
      *
      * @return an enum indicating how the baseline changes as the component
      *         size changes
      * @see #getBaseline(int, int)
      * @since 1.6
      */
     public BaselineResizeBehavior getBaselineResizeBehavior() {
         return BaselineResizeBehavior.OTHER;
     }

     /**
      * Prompts the layout manager to lay out this component. This is
      * usually called when the component (more specifically, container)
      * is validated.
      * @see #validate
      * @see LayoutManager
      */
     public void doLayout() {
         layout();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>doLayout()</code>.
      */
     @Deprecated
     public void layout() {
     }

     /**
      * Validates this component.
      * <p>
      * The meaning of the term <i>validating</i> is defined by the ancestors of
      * this class. See {@link Container#validate} for more details.
      *
      * @see       #invalidate
      * @see       #doLayout()
      * @see       LayoutManager
      * @see       Container#validate
      * @since     JDK1.0
      */
     public void validate() {
         synchronized (getTreeLock()) {
             ComponentPeer peer = this.peer;
             boolean wasValid = isValid();
             if (!wasValid && peer != null) {
                 Font newfont = getFont();
                 Font oldfont = peerFont;
                 if (newfont != oldfont && (oldfont == null
                                            || !oldfont.equals(newfont))) {
                     peer.setFont(newfont);
                     peerFont = newfont;
                 }
                 peer.layout();
             }
             valid = true;
             if (!wasValid) {
                 mixOnValidating();
             }
         }
     }

     /**
      * Invalidates this component and its ancestors.
      * <p>
      * By default, all the ancestors of the component up to the top-most
      * container of the hierarchy are marked invalid. If the {@code
      * java.awt.smartInvalidate} system property is set to {@code true},
      * invalidation stops on the nearest validate root of this component.
      * Marking a container <i>invalid</i> indicates that the container needs to
      * be laid out.
      * <p>
      * This method is called automatically when any layout-related information
      * changes (e.g. setting the bounds of the component, or adding the
      * component to a container).
      * <p>
      * This method might be called often, so it should work fast.
      *
      * @see       #validate
      * @see       #doLayout
      * @see       LayoutManager
      * @see       java.awt.Container#isValidateRoot
      * @since     JDK1.0
      */
     public void invalidate() {
         synchronized (getTreeLock()) {
             /* Nullify cached layout and size information.
              * For efficiency, propagate invalidate() upwards only if
              * some other component hasn't already done so first.
              */
             valid = false;
             if (!isPreferredSizeSet()) {
                 prefSize = null;
             }
             if (!isMinimumSizeSet()) {
                 minSize = null;
             }
             if (!isMaximumSizeSet()) {
                 maxSize = null;
             }
             invalidateParent();
         }
     }

     /**
      * Invalidates the parent of this component if any.
      *
      * This method MUST BE invoked under the TreeLock.
      */
     void invalidateParent() {
         if (parent != null) {
             parent.invalidateIfValid();
         }
     }

     /** Invalidates the component unless it is already invalid.
      */
     final void invalidateIfValid() {
         if (isValid()) {
             invalidate();
         }
     }

     /**
      * Revalidates the component hierarchy up to the nearest validate root.
      * <p>
      * This method first invalidates the component hierarchy starting from this
      * component up to the nearest validate root. Afterwards, the component
      * hierarchy is validated starting from the nearest validate root.
      * <p>
      * This is a convenience method supposed to help application developers
      * avoid looking for validate roots manually. Basically, it's equivalent to
      * first calling the {@link #invalidate()} method on this component, and
      * then calling the {@link #validate()} method on the nearest validate
      * root.
      *
      * @see Container#isValidateRoot
      * @since 1.7
      */
     public void revalidate() {
         synchronized (getTreeLock()) {
             invalidate();

             Container root = getContainer();
             if (root == null) {
                 // There's no parents. Just validate itself.
                 validate();
             } else {
                 while (!root.isValidateRoot()) {
                     if (root.getContainer() == null) {
                         // If there's no validate roots, we'll validate the
                         // topmost container
                         break;
                     }

                     root = root.getContainer();
                 }

                 root.validate();
             }
         }
     }

     /**
      * Creates a graphics context for this component. This method will
      * return <code>null</code> if this component is currently not
      * displayable.
      * @return a graphics context for this component, or <code>null</code>
      *             if it has none
      * @see       #paint
      * @since     JDK1.0
      */
     public Graphics getGraphics() {
         if (peer instanceof LightweightPeer) {
             // This is for a lightweight component, need to
             // translate coordinate spaces and clip relative
             // to the parent.
             if (parent == null) return null;
             Graphics g = parent.getGraphics();
             if (g == null) return null;
             if (g instanceof ConstrainableGraphics) {
                 ((ConstrainableGraphics) g).constrain(x, y, width, height);
             } else {
                 g.translate(x,y);
                 g.setClip(0, 0, width, height);
             }
             g.setFont(getFont());
             return g;
         } else {
             ComponentPeer peer = this.peer;
             return (peer != null) ? peer.getGraphics() : null;
         }
     }

     final Graphics getGraphics_NoClientCode() {
         ComponentPeer peer = this.peer;
         if (peer instanceof LightweightPeer) {
             // This is for a lightweight component, need to
             // translate coordinate spaces and clip relative
             // to the parent.
             Container parent = this.parent;
             if (parent == null) return null;
             Graphics g = parent.getGraphics_NoClientCode();
             if (g == null) return null;
             if (g instanceof ConstrainableGraphics) {
                 ((ConstrainableGraphics) g).constrain(x, y, width, height);
             } else {
                 g.translate(x,y);
                 g.setClip(0, 0, width, height);
             }
             g.setFont(getFont_NoClientCode());
             return g;
         } else {
             return (peer != null) ? peer.getGraphics() : null;
         }
     }

     /**
      * Gets the font metrics for the specified font.
      * Warning: Since Font metrics are affected by the
      * {@link java.awt.font.FontRenderContext FontRenderContext} and
      * this method does not provide one, it can return only metrics for
      * the default render context which may not match that used when
      * rendering on the Component if {@link Graphics2D} functionality is being
      * used. Instead metrics can be obtained at rendering time by calling
      * {@link Graphics#getFontMetrics()} or text measurement APIs on the
      * {@link Font Font} class.
      * @param font the font for which font metrics is to be
      *          obtained
      * @return the font metrics for <code>font</code>
      * @see       #getFont
      * @see       #getPeer
      * @see       java.awt.peer.ComponentPeer#getFontMetrics(Font)
      * @see       Toolkit#getFontMetrics(Font)
      * @since     JDK1.0
      */
     public FontMetrics getFontMetrics(Font font) {
         // This is an unsupported hack, but left in for a customer.
         // Do not remove.
         FontManager fm = FontManagerFactory.getInstance();
         if (fm instanceof SunFontManager
             && ((SunFontManager) fm).usePlatformFontMetrics()) {

             if (peer != null &&
                 !(peer instanceof LightweightPeer)) {
                 return peer.getFontMetrics(font);
             }
         }
         return sun.font.FontDesignMetrics.getMetrics(font);
     }

     /**
      * Sets the cursor image to the specified cursor.  This cursor
      * image is displayed when the <code>contains</code> method for
      * this component returns true for the current cursor location, and
      * this Component is visible, displayable, and enabled. Setting the
      * cursor of a <code>Container</code> causes that cursor to be displayed
      * within all of the container's subcomponents, except for those
      * that have a non-<code>null</code> cursor.
      * <p>
      * The method may have no visual effect if the Java platform
      * implementation and/or the native system do not support
      * changing the mouse cursor shape.
      * @param cursor One of the constants defined
      *          by the <code>Cursor</code> class;
      *          if this parameter is <code>null</code>
      *          then this component will inherit
      *          the cursor of its parent
      * @see       #isEnabled
      * @see       #isShowing
      * @see       #getCursor
      * @see       #contains
      * @see       Toolkit#createCustomCursor
      * @see       Cursor
      * @since     JDK1.1
      */
     public void setCursor(Cursor cursor) {
         this.cursor = cursor;
         updateCursorImmediately();
     }

     /**
      * Updates the cursor.  May not be invoked from the native
      * message pump.
      */
     final void updateCursorImmediately() {
         if (peer instanceof LightweightPeer) {
             Container nativeContainer = getNativeContainer();

             if (nativeContainer == null) return;

             ComponentPeer cPeer = nativeContainer.getPeer();

             if (cPeer != null) {
                 cPeer.updateCursorImmediately();
             }
         } else if (peer != null) {
             peer.updateCursorImmediately();
         }
     }

     /**
      * Gets the cursor set in the component. If the component does
      * not have a cursor set, the cursor of its parent is returned.
      * If no cursor is set in the entire hierarchy,
      * <code>Cursor.DEFAULT_CURSOR</code> is returned.
      * @see #setCursor
      * @since      JDK1.1
      */
     public Cursor getCursor() {
         return getCursor_NoClientCode();
     }

     final Cursor getCursor_NoClientCode() {
         Cursor cursor = this.cursor;
         if (cursor != null) {
             return cursor;
         }
         Container parent = this.parent;
         if (parent != null) {
             return parent.getCursor_NoClientCode();
         } else {
             return Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR);
         }
     }

     /**
      * Returns whether the cursor has been explicitly set for this Component.
      * If this method returns <code>false</code>, this Component is inheriting
      * its cursor from an ancestor.
      *
      * @return <code>true</code> if the cursor has been explicitly set for this
      *         Component; <code>false</code> otherwise.
      * @since 1.4
      */
     public boolean isCursorSet() {
         return (cursor != null);
     }

     /**
      * Paints this component.
      * <p>
      * This method is called when the contents of the component should
      * be painted; such as when the component is first being shown or
      * is damaged and in need of repair.  The clip rectangle in the
      * <code>Graphics</code> parameter is set to the area
      * which needs to be painted.
      * Subclasses of <code>Component</code> that override this
      * method need not call <code>super.paint(g)</code>.
      * <p>
      * For performance reasons, <code>Component</code>s with zero width
      * or height aren't considered to need painting when they are first shown,
      * and also aren't considered to need repair.
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
      *
      * @param g the graphics context to use for painting
      * @see       #update
      * @since     JDK1.0
      */
     public void paint(Graphics g) {
     }

     /**
      * Updates this component.
      * <p>
      * If this component is not a lightweight component, the
      * AWT calls the <code>update</code> method in response to
      * a call to <code>repaint</code>.  You can assume that
      * the background is not cleared.
      * <p>
      * The <code>update</code> method of <code>Component</code>
      * calls this component's <code>paint</code> method to redraw
      * this component.  This method is commonly overridden by subclasses
      * which need to do additional work in response to a call to
      * <code>repaint</code>.
      * Subclasses of Component that override this method should either
      * call <code>super.update(g)</code>, or call <code>paint(g)</code>
      * directly from their <code>update</code> method.
      * <p>
      * The origin of the graphics context, its
      * (<code>0</code>,&nbsp;<code>0</code>) coordinate point, is the
      * top-left corner of this component. The clipping region of the
      * graphics context is the bounding rectangle of this component.
      *
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
      *
      * @param g the specified context to use for updating
      * @see       #paint
      * @see       #repaint()
      * @since     JDK1.0
      */
     public void update(Graphics g) {
         paint(g);
     }

     /**
      * Paints this component and all of its subcomponents.
      * <p>
      * The origin of the graphics context, its
      * (<code>0</code>,&nbsp;<code>0</code>) coordinate point, is the
      * top-left corner of this component. The clipping region of the
      * graphics context is the bounding rectangle of this component.
      *
      * @param     g   the graphics context to use for painting
      * @see       #paint
      * @since     JDK1.0
      */
     public void paintAll(Graphics g) {
         if (isShowing()) {
             GraphicsCallback.PeerPaintCallback.getInstance().
                 runOneComponent(this, new Rectangle(0, 0, width, height),
                                 g, g.getClip(),
                                 GraphicsCallback.LIGHTWEIGHTS |
                                 GraphicsCallback.HEAVYWEIGHTS);
         }
     }

     /**
      * Simulates the peer callbacks into java.awt for painting of
      * lightweight Components.
      * @param     g   the graphics context to use for painting
      * @see       #paintAll
      */
     void lightweightPaint(Graphics g) {
         paint(g);
     }

     /**
      * Paints all the heavyweight subcomponents.
      */
     void paintHeavyweightComponents(Graphics g) {
     }

     /**
      * Repaints this component.
      * <p>
      * If this component is a lightweight component, this method
      * causes a call to this component's <code>paint</code>
      * method as soon as possible.  Otherwise, this method causes
      * a call to this component's <code>update</code> method as soon
      * as possible.
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.

      *
      * @see       #update(Graphics)
      * @since     JDK1.0
      */
     public void repaint() {
         repaint(0, 0, 0, width, height);
     }

     /**
      * Repaints the component.  If this component is a lightweight
      * component, this results in a call to <code>paint</code>
      * within <code>tm</code> milliseconds.
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
      *
      * @param tm maximum time in milliseconds before update
      * @see #paint
      * @see #update(Graphics)
      * @since JDK1.0
      */
     public void repaint(long tm) {
         repaint(tm, 0, 0, width, height);
     }

     /**
      * Repaints the specified rectangle of this component.
      * <p>
      * If this component is a lightweight component, this method
      * causes a call to this component's <code>paint</code> method
      * as soon as possible.  Otherwise, this method causes a call to
      * this component's <code>update</code> method as soon as possible.
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
      *
      * @param     x   the <i>x</i> coordinate
      * @param     y   the <i>y</i> coordinate
      * @param     width   the width
      * @param     height  the height
      * @see       #update(Graphics)
      * @since     JDK1.0
      */
     public void repaint(int x, int y, int width, int height) {
         repaint(0, x, y, width, height);
     }

     /**
      * Repaints the specified rectangle of this component within
      * <code>tm</code> milliseconds.
      * <p>
      * If this component is a lightweight component, this method causes
      * a call to this component's <code>paint</code> method.
      * Otherwise, this method causes a call to this component's
      * <code>update</code> method.
      * <p>
      * <b>Note</b>: For more information on the paint mechanisms utilitized
      * by AWT and Swing, including information on how to write the most
      * efficient painting code, see
      * <a href="http://java.sun.com/products/jfc/tsc/articles/painting/index.html">Painting in AWT and Swing</a>.
      *
      * @param     tm   maximum time in milliseconds before update
      * @param     x    the <i>x</i> coordinate
      * @param     y    the <i>y</i> coordinate
      * @param     width    the width
      * @param     height   the height
      * @see       #update(Graphics)
      * @since     JDK1.0
      */
     public void repaint(long tm, int x, int y, int width, int height) {
         if (this.peer instanceof LightweightPeer) {
             // Needs to be translated to parent coordinates since
             // a parent native container provides the actual repaint
             // services.  Additionally, the request is restricted to
             // the bounds of the component.
             if (parent != null) {
                 if (x < 0) {
                     width += x;
                     x = 0;
                 }
                 if (y < 0) {
                     height += y;
                     y = 0;
                 }

                 int pwidth = (width > this.width) ? this.width : width;
                 int pheight = (height > this.height) ? this.height : height;

                 if (pwidth <= 0 || pheight <= 0) {
                     return;
                 }

                 int px = this.x + x;
                 int py = this.y + y;
                 parent.repaint(tm, px, py, pwidth, pheight);
             }
         } else {
             if (isVisible() && (this.peer != null) &&
                 (width > 0) && (height > 0)) {
                 PaintEvent e = new PaintEvent(this, PaintEvent.UPDATE,
                                               new Rectangle(x, y, width, height));
                 Toolkit.getEventQueue().postEvent(e);
             }
         }
     }

     /**
      * Prints this component. Applications should override this method
      * for components that must do special processing before being
      * printed or should be printed differently than they are painted.
      * <p>
      * The default implementation of this method calls the
      * <code>paint</code> method.
      * <p>
      * The origin of the graphics context, its
      * (<code>0</code>,&nbsp;<code>0</code>) coordinate point, is the
      * top-left corner of this component. The clipping region of the
      * graphics context is the bounding rectangle of this component.
      * @param     g   the graphics context to use for printing
      * @see       #paint(Graphics)
      * @since     JDK1.0
      */
     public void print(Graphics g) {
         paint(g);
     }

     /**
      * Prints this component and all of its subcomponents.
      * <p>
      * The origin of the graphics context, its
      * (<code>0</code>,&nbsp;<code>0</code>) coordinate point, is the
      * top-left corner of this component. The clipping region of the
      * graphics context is the bounding rectangle of this component.
      * @param     g   the graphics context to use for printing
      * @see       #print(Graphics)
      * @since     JDK1.0
      */
     public void printAll(Graphics g) {
         if (isShowing()) {
             GraphicsCallback.PeerPrintCallback.getInstance().
                 runOneComponent(this, new Rectangle(0, 0, width, height),
                                 g, g.getClip(),
                                 GraphicsCallback.LIGHTWEIGHTS |
                                 GraphicsCallback.HEAVYWEIGHTS);
         }
     }

     /**
      * Simulates the peer callbacks into java.awt for printing of
      * lightweight Components.
      * @param     g   the graphics context to use for printing
      * @see       #printAll
      */
     void lightweightPrint(Graphics g) {
         print(g);
     }

     /**
      * Prints all the heavyweight subcomponents.
      */
     void printHeavyweightComponents(Graphics g) {
     }

     private Insets getInsets_NoClientCode() {
         ComponentPeer peer = this.peer;
         if (peer instanceof ContainerPeer) {
             return (Insets)((ContainerPeer)peer).getInsets().clone();
         }
         return new Insets(0, 0, 0, 0);
     }

     /**
      * Repaints the component when the image has changed.
      * This <code>imageUpdate</code> method of an <code>ImageObserver</code>
      * is called when more information about an
      * image which had been previously requested using an asynchronous
      * routine such as the <code>drawImage</code> method of
      * <code>Graphics</code> becomes available.
      * See the definition of <code>imageUpdate</code> for
      * more information on this method and its arguments.
      * <p>
      * The <code>imageUpdate</code> method of <code>Component</code>
      * incrementally draws an image on the component as more of the bits
      * of the image are available.
      * <p>
      * If the system property <code>awt.image.incrementaldraw</code>
      * is missing or has the value <code>true</code>, the image is
      * incrementally drawn. If the system property has any other value,
      * then the image is not drawn until it has been completely loaded.
      * <p>
      * Also, if incremental drawing is in effect, the value of the
      * system property <code>awt.image.redrawrate</code> is interpreted
      * as an integer to give the maximum redraw rate, in milliseconds. If
      * the system property is missing or cannot be interpreted as an
      * integer, the redraw rate is once every 100ms.
      * <p>
      * The interpretation of the <code>x</code>, <code>y</code>,
      * <code>width</code>, and <code>height</code> arguments depends on
      * the value of the <code>infoflags</code> argument.
      *
      * @param     img   the image being observed
      * @param     infoflags   see <code>imageUpdate</code> for more information
      * @param     x   the <i>x</i> coordinate
      * @param     y   the <i>y</i> coordinate
      * @param     w   the width
      * @param     h   the height
      * @return    <code>false</code> if the infoflags indicate that the
      *            image is completely loaded; <code>true</code> otherwise.
      *
      * @see     java.awt.image.ImageObserver
      * @see     Graphics#drawImage(Image, int, int, Color, java.awt.image.ImageObserver)
      * @see     Graphics#drawImage(Image, int, int, java.awt.image.ImageObserver)
      * @see     Graphics#drawImage(Image, int, int, int, int, Color, java.awt.image.ImageObserver)
      * @see     Graphics#drawImage(Image, int, int, int, int, java.awt.image.ImageObserver)
      * @see     java.awt.image.ImageObserver#imageUpdate(java.awt.Image, int, int, int, int, int)
      * @since   JDK1.0
      */
     public boolean imageUpdate(Image img, int infoflags,
                                int x, int y, int w, int h) {
         int rate = -1;
         if ((infoflags & (FRAMEBITS|ALLBITS)) != 0) {
             rate = 0;
         } else if ((infoflags & SOMEBITS) != 0) {
             if (isInc) {
                 rate = incRate;
                 if (rate < 0) {
                     rate = 0;
                 }
             }
         }
         if (rate >= 0) {
             repaint(rate, 0, 0, width, height);
         }
         return (infoflags & (ALLBITS|ABORT)) == 0;
     }

     /**
      * Creates an image from the specified image producer.
      * @param     producer  the image producer
      * @return    the image produced
      * @since     JDK1.0
      */
     public Image createImage(ImageProducer producer) {
         ComponentPeer peer = this.peer;
         if ((peer != null) && ! (peer instanceof LightweightPeer)) {
             return peer.createImage(producer);
         }
         return getToolkit().createImage(producer);
     }

     /**
      * Creates an off-screen drawable image
      *     to be used for double buffering.
      * @param     width the specified width
      * @param     height the specified height
      * @return    an off-screen drawable image, which can be used for double
      *    buffering.  The return value may be <code>null</code> if the
      *    component is not displayable.  This will always happen if
      *    <code>GraphicsEnvironment.isHeadless()</code> returns
      *    <code>true</code>.
      * @see #isDisplayable
      * @see GraphicsEnvironment#isHeadless
      * @since     JDK1.0
      */
     public Image createImage(int width, int height) {
         ComponentPeer peer = this.peer;
         if (peer instanceof LightweightPeer) {
             if (parent != null) { return parent.createImage(width, height); }
             else { return null;}
         } else {
             return (peer != null) ? peer.createImage(width, height) : null;
         }
     }

     /**
      * Creates a volatile off-screen drawable image
      *     to be used for double buffering.
      * @param     width the specified width.
      * @param     height the specified height.
      * @return    an off-screen drawable image, which can be used for double
      *    buffering.  The return value may be <code>null</code> if the
      *    component is not displayable.  This will always happen if
      *    <code>GraphicsEnvironment.isHeadless()</code> returns
      *    <code>true</code>.
      * @see java.awt.image.VolatileImage
      * @see #isDisplayable
      * @see GraphicsEnvironment#isHeadless
      * @since     1.4
      */
     public VolatileImage createVolatileImage(int width, int height) {
         ComponentPeer peer = this.peer;
         if (peer instanceof LightweightPeer) {
             if (parent != null) {
                 return parent.createVolatileImage(width, height);
             }
             else { return null;}
         } else {
             return (peer != null) ?
                 peer.createVolatileImage(width, height) : null;
         }
     }

     /**
      * Creates a volatile off-screen drawable image, with the given capabilities.
      * The contents of this image may be lost at any time due
      * to operating system issues, so the image must be managed
      * via the <code>VolatileImage</code> interface.
      * @param width the specified width.
      * @param height the specified height.
      * @param caps the image capabilities
      * @exception AWTException if an image with the specified capabilities cannot
      * be created
      * @return a VolatileImage object, which can be used
      * to manage surface contents loss and capabilities.
      * @see java.awt.image.VolatileImage
      * @since 1.4
      */
     public VolatileImage createVolatileImage(int width, int height,
                                              ImageCapabilities caps) throws AWTException {
         // REMIND : check caps
         return createVolatileImage(width, height);
     }

     /**
      * Prepares an image for rendering on this component.  The image
      * data is downloaded asynchronously in another thread and the
      * appropriate screen representation of the image is generated.
      * @param     image   the <code>Image</code> for which to
      *                    prepare a screen representation
      * @param     observer   the <code>ImageObserver</code> object
      *                       to be notified as the image is being prepared
      * @return    <code>true</code> if the image has already been fully
      *           prepared; <code>false</code> otherwise
      * @since     JDK1.0
      */
     public boolean prepareImage(Image image, ImageObserver observer) {
         return prepareImage(image, -1, -1, observer);
     }

     /**
      * Prepares an image for rendering on this component at the
      * specified width and height.
      * <p>
      * The image data is downloaded asynchronously in another thread,
      * and an appropriately scaled screen representation of the image is
      * generated.
      * @param     image    the instance of <code>Image</code>
      *            for which to prepare a screen representation
      * @param     width    the width of the desired screen representation
      * @param     height   the height of the desired screen representation
      * @param     observer   the <code>ImageObserver</code> object
      *            to be notified as the image is being prepared
      * @return    <code>true</code> if the image has already been fully
      *          prepared; <code>false</code> otherwise
      * @see       java.awt.image.ImageObserver
      * @since     JDK1.0
      */
     public boolean prepareImage(Image image, int width, int height,
                                 ImageObserver observer) {
         ComponentPeer peer = this.peer;
         if (peer instanceof LightweightPeer) {
             return (parent != null)
                 ? parent.prepareImage(image, width, height, observer)
                 : getToolkit().prepareImage(image, width, height, observer);
         } else {
             return (peer != null)
                 ? peer.prepareImage(image, width, height, observer)
                 : getToolkit().prepareImage(image, width, height, observer);
         }
     }

     /**
      * Returns the status of the construction of a screen representation
      * of the specified image.
      * <p>
      * This method does not cause the image to begin loading. An
      * application must use the <code>prepareImage</code> method
      * to force the loading of an image.
      * <p>
      * Information on the flags returned by this method can be found
      * with the discussion of the <code>ImageObserver</code> interface.
      * @param     image   the <code>Image</code> object whose status
      *            is being checked
      * @param     observer   the <code>ImageObserver</code>
      *            object to be notified as the image is being prepared
      * @return  the bitwise inclusive <b>OR</b> of
      *            <code>ImageObserver</code> flags indicating what
      *            information about the image is currently available
      * @see      #prepareImage(Image, int, int, java.awt.image.ImageObserver)
      * @see      Toolkit#checkImage(Image, int, int, java.awt.image.ImageObserver)
      * @see      java.awt.image.ImageObserver
      * @since    JDK1.0
      */
     public int checkImage(Image image, ImageObserver observer) {
         return checkImage(image, -1, -1, observer);
     }

     /**
      * Returns the status of the construction of a screen representation
      * of the specified image.
      * <p>
      * This method does not cause the image to begin loading. An
      * application must use the <code>prepareImage</code> method
      * to force the loading of an image.
      * <p>
      * The <code>checkImage</code> method of <code>Component</code>
      * calls its peer's <code>checkImage</code> method to calculate
      * the flags. If this component does not yet have a peer, the
      * component's toolkit's <code>checkImage</code> method is called
      * instead.
      * <p>
      * Information on the flags returned by this method can be found
      * with the discussion of the <code>ImageObserver</code> interface.
      * @param     image   the <code>Image</code> object whose status
      *                    is being checked
      * @param     width   the width of the scaled version
      *                    whose status is to be checked
      * @param     height  the height of the scaled version
      *                    whose status is to be checked
      * @param     observer   the <code>ImageObserver</code> object
      *                    to be notified as the image is being prepared
      * @return    the bitwise inclusive <b>OR</b> of
      *            <code>ImageObserver</code> flags indicating what
      *            information about the image is currently available
      * @see      #prepareImage(Image, int, int, java.awt.image.ImageObserver)
      * @see      Toolkit#checkImage(Image, int, int, java.awt.image.ImageObserver)
      * @see      java.awt.image.ImageObserver
      * @since    JDK1.0
      */
     public int checkImage(Image image, int width, int height,
                           ImageObserver observer) {
         ComponentPeer peer = this.peer;
         if (peer instanceof LightweightPeer) {
             return (parent != null)
                 ? parent.checkImage(image, width, height, observer)
                 : getToolkit().checkImage(image, width, height, observer);
         } else {
             return (peer != null)
                 ? peer.checkImage(image, width, height, observer)
                 : getToolkit().checkImage(image, width, height, observer);
         }
     }

     /**
      * Creates a new strategy for multi-buffering on this component.
      * Multi-buffering is useful for rendering performance.  This method
      * attempts to create the best strategy available with the number of
      * buffers supplied.  It will always create a <code>BufferStrategy</code>
      * with that number of buffers.
      * A page-flipping strategy is attempted first, then a blitting strategy
      * using accelerated buffers.  Finally, an unaccelerated blitting
      * strategy is used.
      * <p>
      * Each time this method is called,
      * the existing buffer strategy for this component is discarded.
      * @param numBuffers number of buffers to create, including the front buffer
      * @exception IllegalArgumentException if numBuffers is less than 1.
      * @exception IllegalStateException if the component is not displayable
      * @see #isDisplayable
      * @see Window#getBufferStrategy()
      * @see Canvas#getBufferStrategy()
      * @since 1.4
      */
     void createBufferStrategy(int numBuffers) {
         BufferCapabilities bufferCaps;
         if (numBuffers > 1) {
             // Try to create a page-flipping strategy
             bufferCaps = new BufferCapabilities(new ImageCapabilities(true),
                                                 new ImageCapabilities(true),
                                                 BufferCapabilities.FlipContents.UNDEFINED);
             try {
                 createBufferStrategy(numBuffers, bufferCaps);
                 return; // Success
             } catch (AWTException e) {
                 // Failed
             }
         }
         // Try a blitting (but still accelerated) strategy
         bufferCaps = new BufferCapabilities(new ImageCapabilities(true),
                                             new ImageCapabilities(true),
                                             null);
         try {
             createBufferStrategy(numBuffers, bufferCaps);
             return; // Success
         } catch (AWTException e) {
             // Failed
         }
         // Try an unaccelerated blitting strategy
         bufferCaps = new BufferCapabilities(new ImageCapabilities(false),
                                             new ImageCapabilities(false),
                                             null);
         try {
             createBufferStrategy(numBuffers, bufferCaps);
             return; // Success
         } catch (AWTException e) {
             // Failed
         }
         // Code should never reach here (an unaccelerated blitting
         // strategy should always work)
         throw new InternalError("Could not create a buffer strategy");
     }

     /**
      * Creates a new strategy for multi-buffering on this component with the
      * required buffer capabilities.  This is useful, for example, if only
      * accelerated memory or page flipping is desired (as specified by the
      * buffer capabilities).
      * <p>
      * Each time this method
      * is called, <code>dispose</code> will be invoked on the existing
      * <code>BufferStrategy</code>.
      * @param numBuffers number of buffers to create
      * @param caps the required capabilities for creating the buffer strategy;
      * cannot be <code>null</code>
      * @exception AWTException if the capabilities supplied could not be
      * supported or met; this may happen, for example, if there is not enough
      * accelerated memory currently available, or if page flipping is specified
      * but not possible.
      * @exception IllegalArgumentException if numBuffers is less than 1, or if
      * caps is <code>null</code>
      * @see Window#getBufferStrategy()
      * @see Canvas#getBufferStrategy()
      * @since 1.4
      */
     void createBufferStrategy(int numBuffers,
                               BufferCapabilities caps) throws AWTException {
         // Check arguments
         if (numBuffers < 1) {
             throw new IllegalArgumentException(
                 "Number of buffers must be at least 1");
         }
         if (caps == null) {
             throw new IllegalArgumentException("No capabilities specified");
         }
         // Destroy old buffers
         if (bufferStrategy != null) {
             bufferStrategy.dispose();
         }
         if (numBuffers == 1) {
             bufferStrategy = new SingleBufferStrategy(caps);
         } else {
             SunGraphicsEnvironment sge = (SunGraphicsEnvironment)
                 GraphicsEnvironment.getLocalGraphicsEnvironment();
             if (!caps.isPageFlipping() && sge.isFlipStrategyPreferred(peer)) {
                 caps = new ProxyCapabilities(caps);
             }
             // assert numBuffers > 1;
             if (caps.isPageFlipping()) {
                 bufferStrategy = new FlipSubRegionBufferStrategy(numBuffers, caps);
             } else {
                 bufferStrategy = new BltSubRegionBufferStrategy(numBuffers, caps);
             }
         }
     }

     /**
      * This is a proxy capabilities class used when a FlipBufferStrategy
      * is created instead of the requested Blit strategy.
      *
      * @see sun.awt.SunGraphicsEnvironment#isFlipStrategyPreferred(ComponentPeer)
      */
     private class ProxyCapabilities extends ExtendedBufferCapabilities {
         private BufferCapabilities orig;
         private ProxyCapabilities(BufferCapabilities orig) {
             super(orig.getFrontBufferCapabilities(),
                   orig.getBackBufferCapabilities(),
                   orig.getFlipContents() ==
                       BufferCapabilities.FlipContents.BACKGROUND ?
                       BufferCapabilities.FlipContents.BACKGROUND :
                       BufferCapabilities.FlipContents.COPIED);
             this.orig = orig;
         }
     }

     /**
      * @return the buffer strategy used by this component
      * @see Window#createBufferStrategy
      * @see Canvas#createBufferStrategy
      * @since 1.4
      */
     BufferStrategy getBufferStrategy() {
         return bufferStrategy;
     }

     /**
      * @return the back buffer currently used by this component's
      * BufferStrategy.  If there is no BufferStrategy or no
      * back buffer, this method returns null.
      */
     Image getBackBuffer() {
         if (bufferStrategy != null) {
             if (bufferStrategy instanceof BltBufferStrategy) {
                 BltBufferStrategy bltBS = (BltBufferStrategy)bufferStrategy;
                 return bltBS.getBackBuffer();
             } else if (bufferStrategy instanceof FlipBufferStrategy) {
                 FlipBufferStrategy flipBS = (FlipBufferStrategy)bufferStrategy;
                 return flipBS.getBackBuffer();
             }
         }
         return null;
     }

     /**
      * Inner class for flipping buffers on a component.  That component must
      * be a <code>Canvas</code> or <code>Window</code>.
      * @see Canvas
      * @see Window
      * @see java.awt.image.BufferStrategy
      * @author Michael Martak
      * @since 1.4
      */
     protected class FlipBufferStrategy extends BufferStrategy {
         /**
          * The number of buffers
          */
         protected int numBuffers; // = 0
         /**
          * The buffering capabilities
          */
         protected BufferCapabilities caps; // = null
         /**
          * The drawing buffer
          */
         protected Image drawBuffer; // = null
         /**
          * The drawing buffer as a volatile image
          */
         protected VolatileImage drawVBuffer; // = null
         /**
          * Whether or not the drawing buffer has been recently restored from
          * a lost state.
          */
         protected boolean validatedContents; // = false
         /**
          * Size of the back buffers.  (Note: these fields were added in 6.0
          * but kept package-private to avoid exposing them in the spec.
          * None of these fields/methods really should have been marked
          * protected when they were introduced in 1.4, but now we just have
          * to live with that decision.)
          */
         int width;
         int height;

         /**
          * Creates a new flipping buffer strategy for this component.
          * The component must be a <code>Canvas</code> or <code>Window</code>.
          * @see Canvas
          * @see Window
          * @param numBuffers the number of buffers
          * @param caps the capabilities of the buffers
          * @exception AWTException if the capabilities supplied could not be
          * supported or met
          * @exception ClassCastException if the component is not a canvas or
          * window.
          * @exception IllegalStateException if the component has no peer
          * @exception IllegalArgumentException if {@code numBuffers} is less than two,
          * or if {@code BufferCapabilities.isPageFlipping} is not
          * {@code true}.
          * @see #createBuffers(int, BufferCapabilities)
          */
         protected FlipBufferStrategy(int numBuffers, BufferCapabilities caps)
             throws AWTException
         {
             if (!(Component.this instanceof Window) &&
                 !(Component.this instanceof Canvas))
             {
                 throw new ClassCastException(
                     "Component must be a Canvas or Window");
             }
             this.numBuffers = numBuffers;
             this.caps = caps;
             createBuffers(numBuffers, caps);
         }

         /**
          * Creates one or more complex, flipping buffers with the given
          * capabilities.
          * @param numBuffers number of buffers to create; must be greater than
          * one
          * @param caps the capabilities of the buffers.
          * <code>BufferCapabilities.isPageFlipping</code> must be
          * <code>true</code>.
          * @exception AWTException if the capabilities supplied could not be
          * supported or met
          * @exception IllegalStateException if the component has no peer
          * @exception IllegalArgumentException if numBuffers is less than two,
          * or if <code>BufferCapabilities.isPageFlipping</code> is not
          * <code>true</code>.
          * @see java.awt.BufferCapabilities#isPageFlipping()
          */
         protected void createBuffers(int numBuffers, BufferCapabilities caps)
             throws AWTException
         {
             if (numBuffers < 2) {
                 throw new IllegalArgumentException(
                     "Number of buffers cannot be less than two");
             } else if (peer == null) {
                 throw new IllegalStateException(
                     "Component must have a valid peer");
             } else if (caps == null || !caps.isPageFlipping()) {
                 throw new IllegalArgumentException(
                     "Page flipping capabilities must be specified");
             }

             // save the current bounds
             width = getWidth();
             height = getHeight();

             if (drawBuffer != null) {
                 // dispose the existing backbuffers
                 drawBuffer = null;
                 drawVBuffer = null;
                 destroyBuffers();
                 // ... then recreate the backbuffers
             }

             if (caps instanceof ExtendedBufferCapabilities) {
                 ExtendedBufferCapabilities ebc =
                     (ExtendedBufferCapabilities)caps;
                 if (ebc.getVSync() == VSYNC_ON) {
                     // if this buffer strategy is not allowed to be v-synced,
                     // change the caps that we pass to the peer but keep on
                     // trying to create v-synced buffers;
                     // do not throw IAE here in case it is disallowed, see
                     // ExtendedBufferCapabilities for more info
                     if (!VSyncedBSManager.vsyncAllowed(this)) {
                         caps = ebc.derive(VSYNC_DEFAULT);
                     }
                 }
             }

             peer.createBuffers(numBuffers, caps);
             updateInternalBuffers();
         }

         /**
          * Updates internal buffers (both volatile and non-volatile)
          * by requesting the back-buffer from the peer.
          */
         private void updateInternalBuffers() {
             // get the images associated with the draw buffer
             drawBuffer = getBackBuffer();
             if (drawBuffer instanceof VolatileImage) {
                 drawVBuffer = (VolatileImage)drawBuffer;
             } else {
                 drawVBuffer = null;
             }
         }

         /**
          * @return direct access to the back buffer, as an image.
          * @exception IllegalStateException if the buffers have not yet
          * been created
          */
         protected Image getBackBuffer() {
             if (peer != null) {
                 return peer.getBackBuffer();
             } else {
                 throw new IllegalStateException(
                     "Component must have a valid peer");
             }
         }

         /**
          * Flipping moves the contents of the back buffer to the front buffer,
          * either by copying or by moving the video pointer.
          * @param flipAction an integer value describing the flipping action
          * for the contents of the back buffer.  This should be one of the
          * values of the <code>BufferCapabilities.FlipContents</code>
          * property.
          * @exception IllegalStateException if the buffers have not yet
          * been created
          * @see java.awt.BufferCapabilities#getFlipContents()
          */
         protected void flip(BufferCapabilities.FlipContents flipAction) {
             if (peer != null) {
                 Image backBuffer = getBackBuffer();
                 if (backBuffer != null) {
                     peer.flip(0, 0,
                               backBuffer.getWidth(null),
                               backBuffer.getHeight(null), flipAction);
                 }
             } else {
                 throw new IllegalStateException(
                     "Component must have a valid peer");
             }
         }

         void flipSubRegion(int x1, int y1, int x2, int y2,
                       BufferCapabilities.FlipContents flipAction)
         {
             if (peer != null) {
                 peer.flip(x1, y1, x2, y2, flipAction);
             } else {
                 throw new IllegalStateException(
                     "Component must have a valid peer");
             }
         }

         /**
          * Destroys the buffers created through this object
          */
         protected void destroyBuffers() {
             VSyncedBSManager.releaseVsync(this);
             if (peer != null) {
                 peer.destroyBuffers();
             } else {
                 throw new IllegalStateException(
                     "Component must have a valid peer");
             }
         }

         /**
          * @return the buffering capabilities of this strategy
          */
         public BufferCapabilities getCapabilities() {
             if (caps instanceof ProxyCapabilities) {
                 return ((ProxyCapabilities)caps).orig;
             } else {
                 return caps;
             }
         }

         /**
          * @return the graphics on the drawing buffer.  This method may not
          * be synchronized for performance reasons; use of this method by multiple
          * threads should be handled at the application level.  Disposal of the
          * graphics object must be handled by the application.
          */
         public Graphics getDrawGraphics() {
             revalidate();
             return drawBuffer.getGraphics();
         }

         /**
          * Restore the drawing buffer if it has been lost
          */
         protected void revalidate() {
             revalidate(true);
         }

         void revalidate(boolean checkSize) {
             validatedContents = false;

             if (checkSize && (getWidth() != width || getHeight() != height)) {
                 // component has been resized; recreate the backbuffers
                 try {
                     createBuffers(numBuffers, caps);
                 } catch (AWTException e) {
                     // shouldn't be possible
                 }
                 validatedContents = true;
             }

             // get the buffers from the peer every time since they
             // might have been replaced in response to a display change event
             updateInternalBuffers();

             // now validate the backbuffer
             if (drawVBuffer != null) {
                 GraphicsConfiguration gc =
                         getGraphicsConfiguration_NoClientCode();
                 int returnCode = drawVBuffer.validate(gc);
                 if (returnCode == VolatileImage.IMAGE_INCOMPATIBLE) {
                     try {
                         createBuffers(numBuffers, caps);
                     } catch (AWTException e) {
                         // shouldn't be possible
                     }
                     if (drawVBuffer != null) {
                         // backbuffers were recreated, so validate again
                         drawVBuffer.validate(gc);
                     }
                     validatedContents = true;
                 } else if (returnCode == VolatileImage.IMAGE_RESTORED) {
                     validatedContents = true;
                 }
             }
         }

         /**
          * @return whether the drawing buffer was lost since the last call to
          * <code>getDrawGraphics</code>
          */
         public boolean contentsLost() {
             if (drawVBuffer == null) {
                 return false;
             }
             return drawVBuffer.contentsLost();
         }

         /**
          * @return whether the drawing buffer was recently restored from a lost
          * state and reinitialized to the default background color (white)
          */
         public boolean contentsRestored() {
             return validatedContents;
         }

         /**
          * Makes the next available buffer visible by either blitting or
          * flipping.
          */
         public void show() {
             flip(caps.getFlipContents());
         }

         /**
          * Makes specified region of the the next available buffer visible
          * by either blitting or flipping.
          */
         void showSubRegion(int x1, int y1, int x2, int y2) {
             flipSubRegion(x1, y1, x2, y2, caps.getFlipContents());
         }

         /**
          * {@inheritDoc}
          * @since 1.6
          */
         public void dispose() {
             if (Component.this.bufferStrategy == this) {
                 Component.this.bufferStrategy = null;
                 if (peer != null) {
                     destroyBuffers();
                 }
             }
         }

     } // Inner class FlipBufferStrategy

     /**
      * Inner class for blitting offscreen surfaces to a component.
      *
      * @author Michael Martak
      * @since 1.4
      */
     protected class BltBufferStrategy extends BufferStrategy {

         /**
          * The buffering capabilities
          */
         protected BufferCapabilities caps; // = null
         /**
          * The back buffers
          */
         protected VolatileImage[] backBuffers; // = null
         /**
          * Whether or not the drawing buffer has been recently restored from
          * a lost state.
          */
         protected boolean validatedContents; // = false
         /**
          * Size of the back buffers
          */
         protected int width;
         protected int height;

         /**
          * Insets for the hosting Component.  The size of the back buffer
          * is constrained by these.
          */
         private Insets insets;

         /**
          * Creates a new blt buffer strategy around a component
          * @param numBuffers number of buffers to create, including the
          * front buffer
          * @param caps the capabilities of the buffers
          */
         protected BltBufferStrategy(int numBuffers, BufferCapabilities caps) {
             this.caps = caps;
             createBackBuffers(numBuffers - 1);
         }

         /**
          * {@inheritDoc}
          * @since 1.6
          */
         public void dispose() {
             if (backBuffers != null) {
                 for (int counter = backBuffers.length - 1; counter >= 0;
                      counter--) {
                     if (backBuffers[counter] != null) {
                         backBuffers[counter].flush();
                         backBuffers[counter] = null;
                     }
                 }
             }
             if (Component.this.bufferStrategy == this) {
                 Component.this.bufferStrategy = null;
             }
         }

         /**
          * Creates the back buffers
          */
         protected void createBackBuffers(int numBuffers) {
             if (numBuffers == 0) {
                 backBuffers = null;
             } else {
                 // save the current bounds
                 width = getWidth();
                 height = getHeight();
                 insets = getInsets_NoClientCode();
                 int iWidth = width - insets.left - insets.right;
                 int iHeight = height - insets.top - insets.bottom;

                 // It is possible for the component's width and/or height
                 // to be 0 here.  Force the size of the backbuffers to
                 // be > 0 so that creating the image won't fail.
                 iWidth = Math.max(1, iWidth);
                 iHeight = Math.max(1, iHeight);
                 if (backBuffers == null) {
                     backBuffers = new VolatileImage[numBuffers];
                 } else {
                     // flush any existing backbuffers
                     for (int i = 0; i < numBuffers; i++) {
                         if (backBuffers[i] != null) {
                             backBuffers[i].flush();
                             backBuffers[i] = null;
                         }
                     }
                 }

                 // create the backbuffers
                 for (int i = 0; i < numBuffers; i++) {
                     backBuffers[i] = createVolatileImage(iWidth, iHeight);
                 }
             }
         }

         /**
          * @return the buffering capabilities of this strategy
          */
         public BufferCapabilities getCapabilities() {
             return caps;
         }

         /**
          * @return the draw graphics
          */
         public Graphics getDrawGraphics() {
             revalidate();
             Image backBuffer = getBackBuffer();
             if (backBuffer == null) {
                 return getGraphics();
             }
             SunGraphics2D g = (SunGraphics2D)backBuffer.getGraphics();
             g.constrain(-insets.left, -insets.top,
                         backBuffer.getWidth(null) + insets.left,
                         backBuffer.getHeight(null) + insets.top);
             return g;
         }

         /**
          * @return direct access to the back buffer, as an image.
          * If there is no back buffer, returns null.
          */
         Image getBackBuffer() {
             if (backBuffers != null) {
                 return backBuffers[backBuffers.length - 1];
             } else {
                 return null;
             }
         }

         /**
          * Makes the next available buffer visible.
          */
         public void show() {
             showSubRegion(insets.left, insets.top,
                           width - insets.right,
                           height - insets.bottom);
         }

         /**
          * Package-private method to present a specific rectangular area
          * of this buffer.  This class currently shows only the entire
          * buffer, by calling showSubRegion() with the full dimensions of
          * the buffer.  Subclasses (e.g., BltSubRegionBufferStrategy
          * and FlipSubRegionBufferStrategy) may have region-specific show
          * methods that call this method with actual sub regions of the
          * buffer.
          */
         void showSubRegion(int x1, int y1, int x2, int y2) {
             if (backBuffers == null) {
                 return;
             }
             // Adjust location to be relative to client area.
             x1 -= insets.left;
             x2 -= insets.left;
             y1 -= insets.top;
             y2 -= insets.top;
             Graphics g = getGraphics_NoClientCode();
             if (g == null) {
                 // Not showing, bail
                 return;
             }
             try {
                 // First image copy is in terms of Frame's coordinates, need
                 // to translate to client area.
                 g.translate(insets.left, insets.top);
                 for (int i = 0; i < backBuffers.length; i++) {
                     g.drawImage(backBuffers[i],
                                 x1, y1, x2, y2,
                                 x1, y1, x2, y2,
                                 null);
                     g.dispose();
                     g = null;
                     g = backBuffers[i].getGraphics();
                 }
             } finally {
                 if (g != null) {
                     g.dispose();
                 }
             }
         }

         /**
          * Restore the drawing buffer if it has been lost
          */
         protected void revalidate() {
             revalidate(true);
         }

         void revalidate(boolean checkSize) {
             validatedContents = false;

             if (backBuffers == null) {
                 return;
             }

             if (checkSize) {
                 Insets insets = getInsets_NoClientCode();
                 if (getWidth() != width || getHeight() != height ||
                     !insets.equals(this.insets)) {
                     // component has been resized; recreate the backbuffers
                     createBackBuffers(backBuffers.length);
                     validatedContents = true;
                 }
             }

             // now validate the backbuffer
             GraphicsConfiguration gc = getGraphicsConfiguration_NoClientCode();
             int returnCode =
                 backBuffers[backBuffers.length - 1].validate(gc);
             if (returnCode == VolatileImage.IMAGE_INCOMPATIBLE) {
                 if (checkSize) {
                     createBackBuffers(backBuffers.length);
                     // backbuffers were recreated, so validate again
                     backBuffers[backBuffers.length - 1].validate(gc);
                 }
                 // else case means we're called from Swing on the toolkit
                 // thread, don't recreate buffers as that'll deadlock
                 // (creating VolatileImages invokes getting GraphicsConfig
                 // which grabs treelock).
                 validatedContents = true;
             } else if (returnCode == VolatileImage.IMAGE_RESTORED) {
                 validatedContents = true;
             }
         }

         /**
          * @return whether the drawing buffer was lost since the last call to
          * <code>getDrawGraphics</code>
          */
         public boolean contentsLost() {
             if (backBuffers == null) {
                 return false;
             } else {
                 return backBuffers[backBuffers.length - 1].contentsLost();
             }
         }

         /**
          * @return whether the drawing buffer was recently restored from a lost
          * state and reinitialized to the default background color (white)
          */
         public boolean contentsRestored() {
             return validatedContents;
         }
     } // Inner class BltBufferStrategy

     /**
      * Private class to perform sub-region flipping.
      */
     private class FlipSubRegionBufferStrategy extends FlipBufferStrategy
         implements SubRegionShowable
     {

         protected FlipSubRegionBufferStrategy(int numBuffers,
                                               BufferCapabilities caps)
             throws AWTException
         {
             super(numBuffers, caps);
         }

         public void show(int x1, int y1, int x2, int y2) {
             showSubRegion(x1, y1, x2, y2);
         }

         // This is invoked by Swing on the toolkit thread.
         public boolean showIfNotLost(int x1, int y1, int x2, int y2) {
             if (!contentsLost()) {
                 showSubRegion(x1, y1, x2, y2);
                 return !contentsLost();
             }
             return false;
         }
     }

     /**
      * Private class to perform sub-region blitting.  Swing will use
      * this subclass via the SubRegionShowable interface in order to
      * copy only the area changed during a repaint.
      * @see javax.swing.BufferStrategyPaintManager
      */
     private class BltSubRegionBufferStrategy extends BltBufferStrategy
         implements SubRegionShowable
     {

         protected BltSubRegionBufferStrategy(int numBuffers,
                                              BufferCapabilities caps)
         {
             super(numBuffers, caps);
         }

         public void show(int x1, int y1, int x2, int y2) {
             showSubRegion(x1, y1, x2, y2);
         }

         // This method is called by Swing on the toolkit thread.
         public boolean showIfNotLost(int x1, int y1, int x2, int y2) {
             if (!contentsLost()) {
                 showSubRegion(x1, y1, x2, y2);
                 return !contentsLost();
             }
             return false;
         }
     }

     /**
      * Inner class for flipping buffers on a component.  That component must
      * be a <code>Canvas</code> or <code>Window</code>.
      * @see Canvas
      * @see Window
      * @see java.awt.image.BufferStrategy
      * @author Michael Martak
      * @since 1.4
      */
     private class SingleBufferStrategy extends BufferStrategy {

         private BufferCapabilities caps;

         public SingleBufferStrategy(BufferCapabilities caps) {
             this.caps = caps;
         }
         public BufferCapabilities getCapabilities() {
             return caps;
         }
         public Graphics getDrawGraphics() {
             return getGraphics();
         }
         public boolean contentsLost() {
             return false;
         }
         public boolean contentsRestored() {
             return false;
         }
         public void show() {
             // Do nothing
         }
     } // Inner class SingleBufferStrategy

     /**
      * Sets whether or not paint messages received from the operating system
      * should be ignored.  This does not affect paint events generated in
      * software by the AWT, unless they are an immediate response to an
      * OS-level paint message.
      * <p>
      * This is useful, for example, if running under full-screen mode and
      * better performance is desired, or if page-flipping is used as the
      * buffer strategy.
      *
      * @since 1.4
      * @see #getIgnoreRepaint
      * @see Canvas#createBufferStrategy
      * @see Window#createBufferStrategy
      * @see java.awt.image.BufferStrategy
      * @see GraphicsDevice#setFullScreenWindow
      */
     public void setIgnoreRepaint(boolean ignoreRepaint) {
         this.ignoreRepaint = ignoreRepaint;
     }

     /**
      * @return whether or not paint messages received from the operating system
      * should be ignored.
      *
      * @since 1.4
      * @see #setIgnoreRepaint
      */
     public boolean getIgnoreRepaint() {
         return ignoreRepaint;
     }

     /**
      * Checks whether this component "contains" the specified point,
      * where <code>x</code> and <code>y</code> are defined to be
      * relative to the coordinate system of this component.
      * @param     x   the <i>x</i> coordinate of the point
      * @param     y   the <i>y</i> coordinate of the point
      * @see       #getComponentAt(int, int)
      * @since     JDK1.1
      */
     public boolean contains(int x, int y) {
         return inside(x, y);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by contains(int, int).
      */
     @Deprecated
     public boolean inside(int x, int y) {
         return (x >= 0) && (x < width) && (y >= 0) && (y < height);
     }

     /**
      * Checks whether this component "contains" the specified point,
      * where the point's <i>x</i> and <i>y</i> coordinates are defined
      * to be relative to the coordinate system of this component.
      * @param     p     the point
      * @throws    NullPointerException if {@code p} is {@code null}
      * @see       #getComponentAt(Point)
      * @since     JDK1.1
      */
     public boolean contains(Point p) {
         return contains(p.x, p.y);
     }

     /**
      * Determines if this component or one of its immediate
      * subcomponents contains the (<i>x</i>,&nbsp;<i>y</i>) location,
      * and if so, returns the containing component. This method only
      * looks one level deep. If the point (<i>x</i>,&nbsp;<i>y</i>) is
      * inside a subcomponent that itself has subcomponents, it does not
      * go looking down the subcomponent tree.
      * <p>
      * The <code>locate</code> method of <code>Component</code> simply
      * returns the component itself if the (<i>x</i>,&nbsp;<i>y</i>)
      * coordinate location is inside its bounding box, and <code>null</code>
      * otherwise.
      * @param     x   the <i>x</i> coordinate
      * @param     y   the <i>y</i> coordinate
      * @return    the component or subcomponent that contains the
      *                (<i>x</i>,&nbsp;<i>y</i>) location;
      *                <code>null</code> if the location
      *                is outside this component
      * @see       #contains(int, int)
      * @since     JDK1.0
      */
     public Component getComponentAt(int x, int y) {
         return locate(x, y);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by getComponentAt(int, int).
      */
     @Deprecated
     public Component locate(int x, int y) {
         return contains(x, y) ? this : null;
     }

     /**
      * Returns the component or subcomponent that contains the
      * specified point.
      * @param     p   the point
      * @see       java.awt.Component#contains
      * @since     JDK1.1
      */
     public Component getComponentAt(Point p) {
         return getComponentAt(p.x, p.y);
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>dispatchEvent(AWTEvent e)</code>.
      */
     @Deprecated
     public void deliverEvent(Event e) {
         postEvent(e);
     }

     /**
      * Dispatches an event to this component or one of its sub components.
      * Calls <code>processEvent</code> before returning for 1.1-style
      * events which have been enabled for the <code>Component</code>.
      * @param e the event
      */
     public final void dispatchEvent(AWTEvent e) {
         dispatchEventImpl(e);
     }

     void dispatchEventImpl(AWTEvent e) {
         int id = e.getID();

         // Check that this component belongs to this app-context
         AppContext compContext = appContext;
         if (compContext != null && !compContext.equals(AppContext.getAppContext())) {
             if (eventLog.isLoggable(PlatformLogger.FINE)) {
                 eventLog.fine("Event " + e + " is being dispatched on the wrong AppContext");
             }
         }

         if (eventLog.isLoggable(PlatformLogger.FINEST)) {
             eventLog.finest("{0}", e);
         }

         /*
          * 0. Set timestamp and modifiers of current event.
          */
         EventQueue.setCurrentEventAndMostRecentTime(e);

         /*
          * 1. Pre-dispatchers. Do any necessary retargeting/reordering here
          *    before we notify AWTEventListeners.
          */

         if (e instanceof SunDropTargetEvent) {
             ((SunDropTargetEvent)e).dispatch();
             return;
         }

         if (!e.focusManagerIsDispatching) {
             // Invoke the private focus retargeting method which provides
             // lightweight Component support
             if (e.isPosted) {
                 e = KeyboardFocusManager.retargetFocusEvent(e);
                 e.isPosted = true;
             }

             // Now, with the event properly targeted to a lightweight
             // descendant if necessary, invoke the public focus retargeting
             // and dispatching function
             if (KeyboardFocusManager.getCurrentKeyboardFocusManager().
                 dispatchEvent(e))
             {
                 return;
             }
         }
         if ((e instanceof FocusEvent) && focusLog.isLoggable(PlatformLogger.FINEST)) {
             focusLog.finest("" + e);
         }
         // MouseWheel may need to be retargeted here so that
         // AWTEventListener sees the event go to the correct
         // Component.  If the MouseWheelEvent needs to go to an ancestor,
         // the event is dispatched to the ancestor, and dispatching here
         // stops.
         if (id == MouseEvent.MOUSE_WHEEL &&
             (!eventTypeEnabled(id)) &&
             (peer != null && !peer.handlesWheelScrolling()) &&
             (dispatchMouseWheelToAncestor((MouseWheelEvent)e)))
         {
             return;
         }

         /*
          * 2. Allow the Toolkit to pass this to AWTEventListeners.
          */
         Toolkit toolkit = Toolkit.getDefaultToolkit();
         toolkit.notifyAWTEventListeners(e);


         /*
          * 3. If no one has consumed a key event, allow the
          *    KeyboardFocusManager to process it.
          */
         if (!e.isConsumed()) {
             if (e instanceof java.awt.event.KeyEvent) {
                 KeyboardFocusManager.getCurrentKeyboardFocusManager().
                     processKeyEvent(this, (KeyEvent)e);
                 if (e.isConsumed()) {
                     return;
                 }
             }
         }

         /*
          * 4. Allow input methods to process the event
          */
         if (areInputMethodsEnabled()) {
             // We need to pass on InputMethodEvents since some host
             // input method adapters send them through the Java
             // event queue instead of directly to the component,
             // and the input context also handles the Java composition window
             if(((e instanceof InputMethodEvent) && !(this instanceof CompositionArea))
                ||
                // Otherwise, we only pass on input and focus events, because
                // a) input methods shouldn't know about semantic or component-level events
                // b) passing on the events takes time
                // c) isConsumed() is always true for semantic events.
                (e instanceof InputEvent) || (e instanceof FocusEvent)) {
                 InputContext inputContext = getInputContext();


                 if (inputContext != null) {
                     inputContext.dispatchEvent(e);
                     if (e.isConsumed()) {
                         if ((e instanceof FocusEvent) && focusLog.isLoggable(PlatformLogger.FINEST)) {
                             focusLog.finest("3579: Skipping " + e);
                         }
                         return;
                     }
                 }
             }
         } else {
             // When non-clients get focus, we need to explicitly disable the native
             // input method. The native input method is actually not disabled when
             // the active/passive/peered clients loose focus.
             if (id == FocusEvent.FOCUS_GAINED) {
                 InputContext inputContext = getInputContext();
                 if (inputContext != null && inputContext instanceof sun.awt.im.InputContext) {
                     ((sun.awt.im.InputContext)inputContext).disableNativeIM();
                 }
             }
         }


         /*
          * 5. Pre-process any special events before delivery
          */
         switch(id) {
             // Handling of the PAINT and UPDATE events is now done in the
             // peer's handleEvent() method so the background can be cleared
             // selectively for non-native components on Windows only.
             // - Fred.Ecks@Eng.sun.com, 5-8-98

           case KeyEvent.KEY_PRESSED:
           case KeyEvent.KEY_RELEASED:
               Container p = (Container)((this instanceof Container) ? this : parent);
               if (p != null) {
                   p.preProcessKeyEvent((KeyEvent)e);
                   if (e.isConsumed()) {
                         if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                             focusLog.finest("Pre-process consumed event");
                         }
                       return;
                   }
               }
               break;

           case WindowEvent.WINDOW_CLOSING:
               if (toolkit instanceof WindowClosingListener) {
                   windowClosingException = ((WindowClosingListener)
                                             toolkit).windowClosingNotify((WindowEvent)e);
                   if (checkWindowClosingException()) {
                       return;
                   }
               }
               break;

           default:
               break;
         }

         /*
          * 6. Deliver event for normal processing
          */
         if (newEventsOnly) {
             // Filtering needs to really be moved to happen at a lower
             // level in order to get maximum performance gain;  it is
             // here temporarily to ensure the API spec is honored.
             //
             if (eventEnabled(e)) {
                 processEvent(e);
             }
         } else if (id == MouseEvent.MOUSE_WHEEL) {
             // newEventsOnly will be false for a listenerless ScrollPane, but
             // MouseWheelEvents still need to be dispatched to it so scrolling
             // can be done.
             autoProcessMouseWheel((MouseWheelEvent)e);
         } else if (!(e instanceof MouseEvent && !postsOldMouseEvents())) {
             //
             // backward compatibility
             //
             Event olde = e.convertToOld();
             if (olde != null) {
                 int key = olde.key;
                 int modifiers = olde.modifiers;

                 postEvent(olde);
                 if (olde.isConsumed()) {
                     e.consume();
                 }
                 // if target changed key or modifier values, copy them
                 // back to original event
                 //
                 switch(olde.id) {
                   case Event.KEY_PRESS:
                   case Event.KEY_RELEASE:
                   case Event.KEY_ACTION:
                   case Event.KEY_ACTION_RELEASE:
                       if (olde.key != key) {
                           ((KeyEvent)e).setKeyChar(olde.getKeyEventChar());
                       }
                       if (olde.modifiers != modifiers) {
                           ((KeyEvent)e).setModifiers(olde.modifiers);
                       }
                       break;
                   default:
                       break;
                 }
             }
         }

         /*
          * 8. Special handling for 4061116 : Hook for browser to close modal
          *    dialogs.
          */
         if (id == WindowEvent.WINDOW_CLOSING && !e.isConsumed()) {
             if (toolkit instanceof WindowClosingListener) {
                 windowClosingException =
                     ((WindowClosingListener)toolkit).
                     windowClosingDelivered((WindowEvent)e);
                 if (checkWindowClosingException()) {
                     return;
                 }
             }
         }

         /*
          * 9. Allow the peer to process the event.
          * Except KeyEvents, they will be processed by peer after
          * all KeyEventPostProcessors
          * (see DefaultKeyboardFocusManager.dispatchKeyEvent())
          */
         if (!(e instanceof KeyEvent)) {
             ComponentPeer tpeer = peer;
             if (e instanceof FocusEvent && (tpeer == null || tpeer instanceof LightweightPeer)) {
                 // if focus owner is lightweight then its native container
                 // processes event
                 Component source = (Component)e.getSource();
                 if (source != null) {
                     Container target = source.getNativeContainer();
                     if (target != null) {
                         tpeer = target.getPeer();
                     }
                 }
             }
             if (tpeer != null) {
                 tpeer.handleEvent(e);
             }
         }
     } // dispatchEventImpl()

     /*
      * If newEventsOnly is false, method is called so that ScrollPane can
      * override it and handle common-case mouse wheel scrolling.  NOP
      * for Component.
      */
     void autoProcessMouseWheel(MouseWheelEvent e) {}

     /*
      * Dispatch given MouseWheelEvent to the first ancestor for which
      * MouseWheelEvents are enabled.
      *
      * Returns whether or not event was dispatched to an ancestor
      */
     boolean dispatchMouseWheelToAncestor(MouseWheelEvent e) {
         int newX, newY;
         newX = e.getX() + getX(); // Coordinates take into account at least
         newY = e.getY() + getY(); // the cursor's position relative to this
                                   // Component (e.getX()), and this Component's
                                   // position relative to its parent.
         MouseWheelEvent newMWE;

         if (eventLog.isLoggable(PlatformLogger.FINEST)) {
             eventLog.finest("dispatchMouseWheelToAncestor");
             eventLog.finest("orig event src is of " + e.getSource().getClass());
         }

         /* parent field for Window refers to the owning Window.
          * MouseWheelEvents should NOT be propagated into owning Windows
          */
         synchronized (getTreeLock()) {
             Container anc = getParent();
             while (anc != null && !anc.eventEnabled(e)) {
                 // fix coordinates to be relative to new event source
                 newX += anc.getX();
                 newY += anc.getY();

                 if (!(anc instanceof Window)) {
                     anc = anc.getParent();
                 }
                 else {
                     break;
                 }
             }

             if (eventLog.isLoggable(PlatformLogger.FINEST)) {
                 eventLog.finest("new event src is " + anc.getClass());
             }

             if (anc != null && anc.eventEnabled(e)) {
                 // Change event to be from new source, with new x,y
                 // For now, just create a new event - yucky

                 newMWE = new MouseWheelEvent(anc, // new source
                                              e.getID(),
                                              e.getWhen(),
                                              e.getModifiers(),
                                              newX, // x relative to new source
                                              newY, // y relative to new source
                                              e.getXOnScreen(),
                                              e.getYOnScreen(),
                                              e.getClickCount(),
                                              e.isPopupTrigger(),
                                              e.getScrollType(),
                                              e.getScrollAmount(),
                                              e.getWheelRotation(),
                                              e.getPreciseWheelRotation());
                 ((AWTEvent)e).copyPrivateDataInto(newMWE);
                 // When dispatching a wheel event to
                 // ancestor, there is no need trying to find descendant
                 // lightweights to dispatch event to.
                 // If we dispatch the event to toplevel ancestor,
                 // this could encolse the loop: 6480024.
                 anc.dispatchEventToSelf(newMWE);
                 if (newMWE.isConsumed()) {
                     e.consume();
                 }
                 return true;
             }
         }
         return false;
     }

     boolean checkWindowClosingException() {
         if (windowClosingException != null) {
             if (this instanceof Dialog) {
                 ((Dialog)this).interruptBlocking();
             } else {
                 windowClosingException.fillInStackTrace();
                 windowClosingException.printStackTrace();
                 windowClosingException = null;
             }
             return true;
         }
         return false;
     }

     boolean areInputMethodsEnabled() {
         // in 1.2, we assume input method support is required for all
         // components that handle key events, but components can turn off
         // input methods by calling enableInputMethods(false).
         return ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0) &&
             ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 || keyListener != null);
     }

     // REMIND: remove when filtering is handled at lower level
     boolean eventEnabled(AWTEvent e) {
         return eventTypeEnabled(e.id);
     }

     boolean eventTypeEnabled(int type) {
         switch(type) {
           case ComponentEvent.COMPONENT_MOVED:
           case ComponentEvent.COMPONENT_RESIZED:
           case ComponentEvent.COMPONENT_SHOWN:
           case ComponentEvent.COMPONENT_HIDDEN:
               if ((eventMask & AWTEvent.COMPONENT_EVENT_MASK) != 0 ||
                   componentListener != null) {
                   return true;
               }
               break;
           case FocusEvent.FOCUS_GAINED:
           case FocusEvent.FOCUS_LOST:
               if ((eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0 ||
                   focusListener != null) {
                   return true;
               }
               break;
           case KeyEvent.KEY_PRESSED:
           case KeyEvent.KEY_RELEASED:
           case KeyEvent.KEY_TYPED:
               if ((eventMask & AWTEvent.KEY_EVENT_MASK) != 0 ||
                   keyListener != null) {
                   return true;
               }
               break;
           case MouseEvent.MOUSE_PRESSED:
           case MouseEvent.MOUSE_RELEASED:
           case MouseEvent.MOUSE_ENTERED:
           case MouseEvent.MOUSE_EXITED:
           case MouseEvent.MOUSE_CLICKED:
               if ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0 ||
                   mouseListener != null) {
                   return true;
               }
               break;
           case MouseEvent.MOUSE_MOVED:
           case MouseEvent.MOUSE_DRAGGED:
               if ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0 ||
                   mouseMotionListener != null) {
                   return true;
               }
               break;
           case MouseEvent.MOUSE_WHEEL:
               if ((eventMask & AWTEvent.MOUSE_WHEEL_EVENT_MASK) != 0 ||
                   mouseWheelListener != null) {
                   return true;
               }
               break;
           case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
           case InputMethodEvent.CARET_POSITION_CHANGED:
               if ((eventMask & AWTEvent.INPUT_METHOD_EVENT_MASK) != 0 ||
                   inputMethodListener != null) {
                   return true;
               }
               break;
           case HierarchyEvent.HIERARCHY_CHANGED:
               if ((eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 ||
                   hierarchyListener != null) {
                   return true;
               }
               break;
           case HierarchyEvent.ANCESTOR_MOVED:
           case HierarchyEvent.ANCESTOR_RESIZED:
               if ((eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 ||
                   hierarchyBoundsListener != null) {
                   return true;
               }
               break;
           case ActionEvent.ACTION_PERFORMED:
               if ((eventMask & AWTEvent.ACTION_EVENT_MASK) != 0) {
                   return true;
               }
               break;
           case TextEvent.TEXT_VALUE_CHANGED:
               if ((eventMask & AWTEvent.TEXT_EVENT_MASK) != 0) {
                   return true;
               }
               break;
           case ItemEvent.ITEM_STATE_CHANGED:
               if ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0) {
                   return true;
               }
               break;
           case AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED:
               if ((eventMask & AWTEvent.ADJUSTMENT_EVENT_MASK) != 0) {
                   return true;
               }
               break;
           default:
               break;
         }
         //
         // Always pass on events defined by external programs.
         //
         if (type > AWTEvent.RESERVED_ID_MAX) {
             return true;
         }
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by dispatchEvent(AWTEvent).
      */
     @Deprecated
     public boolean postEvent(Event e) {
         ComponentPeer peer = this.peer;

         if (handleEvent(e)) {
             e.consume();
             return true;
         }

         Component parent = this.parent;
         int eventx = e.x;
         int eventy = e.y;
         if (parent != null) {
             e.translate(x, y);
             if (parent.postEvent(e)) {
                 e.consume();
                 return true;
             }
             // restore coords
             e.x = eventx;
             e.y = eventy;
         }
         return false;
     }

     // Event source interfaces

     /**
      * Adds the specified component listener to receive component events from
      * this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the component listener
      * @see      java.awt.event.ComponentEvent
      * @see      java.awt.event.ComponentListener
      * @see      #removeComponentListener
      * @see      #getComponentListeners
      * @since    JDK1.1
      */
     public synchronized void addComponentListener(ComponentListener l) {
         if (l == null) {
             return;
         }
         componentListener = AWTEventMulticaster.add(componentListener, l);
         newEventsOnly = true;
     }

     /**
      * Removes the specified component listener so that it no longer
      * receives component events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      * @param    l   the component listener
      * @see      java.awt.event.ComponentEvent
      * @see      java.awt.event.ComponentListener
      * @see      #addComponentListener
      * @see      #getComponentListeners
      * @since    JDK1.1
      */
     public synchronized void removeComponentListener(ComponentListener l) {
         if (l == null) {
             return;
         }
         componentListener = AWTEventMulticaster.remove(componentListener, l);
     }

     /**
      * Returns an array of all the component listeners
      * registered on this component.
      *
      * @return all of this comonent's <code>ComponentListener</code>s
      *         or an empty array if no component
      *         listeners are currently registered
      *
      * @see #addComponentListener
      * @see #removeComponentListener
      * @since 1.4
      */
     public synchronized ComponentListener[] getComponentListeners() {
         return (ComponentListener[]) (getListeners(ComponentListener.class));
     }

     /**
      * Adds the specified focus listener to receive focus events from
      * this component when this component gains input focus.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the focus listener
      * @see      java.awt.event.FocusEvent
      * @see      java.awt.event.FocusListener
      * @see      #removeFocusListener
      * @see      #getFocusListeners
      * @since    JDK1.1
      */
     public synchronized void addFocusListener(FocusListener l) {
         if (l == null) {
             return;
         }
         focusListener = AWTEventMulticaster.add(focusListener, l);
         newEventsOnly = true;

         // if this is a lightweight component, enable focus events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(AWTEvent.FOCUS_EVENT_MASK);
         }
     }

     /**
      * Removes the specified focus listener so that it no longer
      * receives focus events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the focus listener
      * @see      java.awt.event.FocusEvent
      * @see      java.awt.event.FocusListener
      * @see      #addFocusListener
      * @see      #getFocusListeners
      * @since    JDK1.1
      */
     public synchronized void removeFocusListener(FocusListener l) {
         if (l == null) {
             return;
         }
         focusListener = AWTEventMulticaster.remove(focusListener, l);
     }

     /**
      * Returns an array of all the focus listeners
      * registered on this component.
      *
      * @return all of this component's <code>FocusListener</code>s
      *         or an empty array if no component
      *         listeners are currently registered
      *
      * @see #addFocusListener
      * @see #removeFocusListener
      * @since 1.4
      */
     public synchronized FocusListener[] getFocusListeners() {
         return (FocusListener[]) (getListeners(FocusListener.class));
     }

     /**
      * Adds the specified hierarchy listener to receive hierarchy changed
      * events from this component when the hierarchy to which this container
      * belongs changes.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the hierarchy listener
      * @see      java.awt.event.HierarchyEvent
      * @see      java.awt.event.HierarchyListener
      * @see      #removeHierarchyListener
      * @see      #getHierarchyListeners
      * @since    1.3
      */
     public void addHierarchyListener(HierarchyListener l) {
         if (l == null) {
             return;
         }
         boolean notifyAncestors;
         synchronized (this) {
             notifyAncestors =
                 (hierarchyListener == null &&
                  (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) == 0);
             hierarchyListener = AWTEventMulticaster.add(hierarchyListener, l);
             notifyAncestors = (notifyAncestors && hierarchyListener != null);
             newEventsOnly = true;
         }
         if (notifyAncestors) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(AWTEvent.HIERARCHY_EVENT_MASK,
                                                 1);
             }
         }
     }

     /**
      * Removes the specified hierarchy listener so that it no longer
      * receives hierarchy changed events from this component. This method
      * performs no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the hierarchy listener
      * @see      java.awt.event.HierarchyEvent
      * @see      java.awt.event.HierarchyListener
      * @see      #addHierarchyListener
      * @see      #getHierarchyListeners
      * @since    1.3
      */
     public void removeHierarchyListener(HierarchyListener l) {
         if (l == null) {
             return;
         }
         boolean notifyAncestors;
         synchronized (this) {
             notifyAncestors =
                 (hierarchyListener != null &&
                  (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) == 0);
             hierarchyListener =
                 AWTEventMulticaster.remove(hierarchyListener, l);
             notifyAncestors = (notifyAncestors && hierarchyListener == null);
         }
         if (notifyAncestors) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(AWTEvent.HIERARCHY_EVENT_MASK,
                                                 -1);
             }
         }
     }

     /**
      * Returns an array of all the hierarchy listeners
      * registered on this component.
      *
      * @return all of this component's <code>HierarchyListener</code>s
      *         or an empty array if no hierarchy
      *         listeners are currently registered
      *
      * @see      #addHierarchyListener
      * @see      #removeHierarchyListener
      * @since    1.4
      */
     public synchronized HierarchyListener[] getHierarchyListeners() {
         return (HierarchyListener[])(getListeners(HierarchyListener.class));
     }

     /**
      * Adds the specified hierarchy bounds listener to receive hierarchy
      * bounds events from this component when the hierarchy to which this
      * container belongs changes.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the hierarchy bounds listener
      * @see      java.awt.event.HierarchyEvent
      * @see      java.awt.event.HierarchyBoundsListener
      * @see      #removeHierarchyBoundsListener
      * @see      #getHierarchyBoundsListeners
      * @since    1.3
      */
     public void addHierarchyBoundsListener(HierarchyBoundsListener l) {
         if (l == null) {
             return;
         }
         boolean notifyAncestors;
         synchronized (this) {
             notifyAncestors =
                 (hierarchyBoundsListener == null &&
                  (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) == 0);
             hierarchyBoundsListener =
                 AWTEventMulticaster.add(hierarchyBoundsListener, l);
             notifyAncestors = (notifyAncestors &&
                                hierarchyBoundsListener != null);
             newEventsOnly = true;
         }
         if (notifyAncestors) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(
                                                 AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK, 1);
             }
         }
     }

     /**
      * Removes the specified hierarchy bounds listener so that it no longer
      * receives hierarchy bounds events from this component. This method
      * performs no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the hierarchy bounds listener
      * @see      java.awt.event.HierarchyEvent
      * @see      java.awt.event.HierarchyBoundsListener
      * @see      #addHierarchyBoundsListener
      * @see      #getHierarchyBoundsListeners
      * @since    1.3
      */
     public void removeHierarchyBoundsListener(HierarchyBoundsListener l) {
         if (l == null) {
             return;
         }
         boolean notifyAncestors;
         synchronized (this) {
             notifyAncestors =
                 (hierarchyBoundsListener != null &&
                  (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) == 0);
             hierarchyBoundsListener =
                 AWTEventMulticaster.remove(hierarchyBoundsListener, l);
             notifyAncestors = (notifyAncestors &&
                                hierarchyBoundsListener == null);
         }
         if (notifyAncestors) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(
                                                 AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK, -1);
             }
         }
     }

     // Should only be called while holding the tree lock
     int numListening(long mask) {
         // One mask or the other, but not neither or both.
         if (eventLog.isLoggable(PlatformLogger.FINE)) {
             if ((mask != AWTEvent.HIERARCHY_EVENT_MASK) &&
                 (mask != AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK))
             {
                 eventLog.fine("Assertion failed");
             }
         }
         if ((mask == AWTEvent.HIERARCHY_EVENT_MASK &&
              (hierarchyListener != null ||
               (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0)) ||
             (mask == AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK &&
              (hierarchyBoundsListener != null ||
               (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0))) {
             return 1;
         } else {
             return 0;
         }
     }

     // Should only be called while holding tree lock
     int countHierarchyMembers() {
         return 1;
     }
     // Should only be called while holding the tree lock
     int createHierarchyEvents(int id, Component changed,
                               Container changedParent, long changeFlags,
                               boolean enabledOnToolkit) {
         switch (id) {
           case HierarchyEvent.HIERARCHY_CHANGED:
               if (hierarchyListener != null ||
                   (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 ||
                   enabledOnToolkit) {
                   HierarchyEvent e = new HierarchyEvent(this, id, changed,
                                                         changedParent,
                                                         changeFlags);
                   dispatchEvent(e);
                   return 1;
               }
               break;
           case HierarchyEvent.ANCESTOR_MOVED:
           case HierarchyEvent.ANCESTOR_RESIZED:
               if (eventLog.isLoggable(PlatformLogger.FINE)) {
                   if (changeFlags != 0) {
                       eventLog.fine("Assertion (changeFlags == 0) failed");
                   }
               }
               if (hierarchyBoundsListener != null ||
                   (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 ||
                   enabledOnToolkit) {
                   HierarchyEvent e = new HierarchyEvent(this, id, changed,
                                                         changedParent);
                   dispatchEvent(e);
                   return 1;
               }
               break;
           default:
               // assert false
               if (eventLog.isLoggable(PlatformLogger.FINE)) {
                   eventLog.fine("This code must never be reached");
               }
               break;
         }
         return 0;
     }

     /**
      * Returns an array of all the hierarchy bounds listeners
      * registered on this component.
      *
      * @return all of this component's <code>HierarchyBoundsListener</code>s
      *         or an empty array if no hierarchy bounds
      *         listeners are currently registered
      *
      * @see      #addHierarchyBoundsListener
      * @see      #removeHierarchyBoundsListener
      * @since    1.4
      */
     public synchronized HierarchyBoundsListener[] getHierarchyBoundsListeners() {
         return (HierarchyBoundsListener[])
             (getListeners(HierarchyBoundsListener.class));
     }

     /*
      * Should only be called while holding the tree lock.
      * It's added only for overriding in java.awt.Window
      * because parent in Window is owner.
      */
     void adjustListeningChildrenOnParent(long mask, int num) {
         if (parent != null) {
             parent.adjustListeningChildren(mask, num);
         }
     }

     /**
      * Adds the specified key listener to receive key events from
      * this component.
      * If l is null, no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the key listener.
      * @see      java.awt.event.KeyEvent
      * @see      java.awt.event.KeyListener
      * @see      #removeKeyListener
      * @see      #getKeyListeners
      * @since    JDK1.1
      */
     public synchronized void addKeyListener(KeyListener l) {
         if (l == null) {
             return;
         }
         keyListener = AWTEventMulticaster.add(keyListener, l);
         newEventsOnly = true;

         // if this is a lightweight component, enable key events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(AWTEvent.KEY_EVENT_MASK);
         }
     }

     /**
      * Removes the specified key listener so that it no longer
      * receives key events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the key listener
      * @see      java.awt.event.KeyEvent
      * @see      java.awt.event.KeyListener
      * @see      #addKeyListener
      * @see      #getKeyListeners
      * @since    JDK1.1
      */
     public synchronized void removeKeyListener(KeyListener l) {
         if (l == null) {
             return;
         }
         keyListener = AWTEventMulticaster.remove(keyListener, l);
     }

     /**
      * Returns an array of all the key listeners
      * registered on this component.
      *
      * @return all of this component's <code>KeyListener</code>s
      *         or an empty array if no key
      *         listeners are currently registered
      *
      * @see      #addKeyListener
      * @see      #removeKeyListener
      * @since    1.4
      */
     public synchronized KeyListener[] getKeyListeners() {
         return (KeyListener[]) (getListeners(KeyListener.class));
     }

     /**
      * Adds the specified mouse listener to receive mouse events from
      * this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse listener
      * @see      java.awt.event.MouseEvent
      * @see      java.awt.event.MouseListener
      * @see      #removeMouseListener
      * @see      #getMouseListeners
      * @since    JDK1.1
      */
     public synchronized void addMouseListener(MouseListener l) {
         if (l == null) {
             return;
         }
         mouseListener = AWTEventMulticaster.add(mouseListener,l);
         newEventsOnly = true;

         // if this is a lightweight component, enable mouse events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(AWTEvent.MOUSE_EVENT_MASK);
         }
     }

     /**
      * Removes the specified mouse listener so that it no longer
      * receives mouse events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse listener
      * @see      java.awt.event.MouseEvent
      * @see      java.awt.event.MouseListener
      * @see      #addMouseListener
      * @see      #getMouseListeners
      * @since    JDK1.1
      */
     public synchronized void removeMouseListener(MouseListener l) {
         if (l == null) {
             return;
         }
         mouseListener = AWTEventMulticaster.remove(mouseListener, l);
     }

     /**
      * Returns an array of all the mouse listeners
      * registered on this component.
      *
      * @return all of this component's <code>MouseListener</code>s
      *         or an empty array if no mouse
      *         listeners are currently registered
      *
      * @see      #addMouseListener
      * @see      #removeMouseListener
      * @since    1.4
      */
     public synchronized MouseListener[] getMouseListeners() {
         return (MouseListener[]) (getListeners(MouseListener.class));
     }

     /**
      * Adds the specified mouse motion listener to receive mouse motion
      * events from this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse motion listener
      * @see      java.awt.event.MouseEvent
      * @see      java.awt.event.MouseMotionListener
      * @see      #removeMouseMotionListener
      * @see      #getMouseMotionListeners
      * @since    JDK1.1
      */
     public synchronized void addMouseMotionListener(MouseMotionListener l) {
         if (l == null) {
             return;
         }
         mouseMotionListener = AWTEventMulticaster.add(mouseMotionListener,l);
         newEventsOnly = true;

         // if this is a lightweight component, enable mouse events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
         }
     }

     /**
      * Removes the specified mouse motion listener so that it no longer
      * receives mouse motion events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse motion listener
      * @see      java.awt.event.MouseEvent
      * @see      java.awt.event.MouseMotionListener
      * @see      #addMouseMotionListener
      * @see      #getMouseMotionListeners
      * @since    JDK1.1
      */
     public synchronized void removeMouseMotionListener(MouseMotionListener l) {
         if (l == null) {
             return;
         }
         mouseMotionListener = AWTEventMulticaster.remove(mouseMotionListener, l);
     }

     /**
      * Returns an array of all the mouse motion listeners
      * registered on this component.
      *
      * @return all of this component's <code>MouseMotionListener</code>s
      *         or an empty array if no mouse motion
      *         listeners are currently registered
      *
      * @see      #addMouseMotionListener
      * @see      #removeMouseMotionListener
      * @since    1.4
      */
     public synchronized MouseMotionListener[] getMouseMotionListeners() {
         return (MouseMotionListener[]) (getListeners(MouseMotionListener.class));
     }

     /**
      * Adds the specified mouse wheel listener to receive mouse wheel events
      * from this component.  Containers also receive mouse wheel events from
      * sub-components.
      * <p>
      * For information on how mouse wheel events are dispatched, see
      * the class description for {@link MouseWheelEvent}.
      * <p>
      * If l is <code>null</code>, no exception is thrown and no
      * action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse wheel listener
      * @see      java.awt.event.MouseWheelEvent
      * @see      java.awt.event.MouseWheelListener
      * @see      #removeMouseWheelListener
      * @see      #getMouseWheelListeners
      * @since    1.4
      */
     public synchronized void addMouseWheelListener(MouseWheelListener l) {
         if (l == null) {
             return;
         }
         mouseWheelListener = AWTEventMulticaster.add(mouseWheelListener,l);
         newEventsOnly = true;

         // if this is a lightweight component, enable mouse events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(AWTEvent.MOUSE_WHEEL_EVENT_MASK);
         }
     }

     /**
      * Removes the specified mouse wheel listener so that it no longer
      * receives mouse wheel events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If l is null, no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the mouse wheel listener.
      * @see      java.awt.event.MouseWheelEvent
      * @see      java.awt.event.MouseWheelListener
      * @see      #addMouseWheelListener
      * @see      #getMouseWheelListeners
      * @since    1.4
      */
     public synchronized void removeMouseWheelListener(MouseWheelListener l) {
         if (l == null) {
             return;
         }
         mouseWheelListener = AWTEventMulticaster.remove(mouseWheelListener, l);
     }

     /**
      * Returns an array of all the mouse wheel listeners
      * registered on this component.
      *
      * @return all of this component's <code>MouseWheelListener</code>s
      *         or an empty array if no mouse wheel
      *         listeners are currently registered
      *
      * @see      #addMouseWheelListener
      * @see      #removeMouseWheelListener
      * @since    1.4
      */
     public synchronized MouseWheelListener[] getMouseWheelListeners() {
         return (MouseWheelListener[]) (getListeners(MouseWheelListener.class));
     }

     /**
      * Adds the specified input method listener to receive
      * input method events from this component. A component will
      * only receive input method events from input methods
      * if it also overrides <code>getInputMethodRequests</code> to return an
      * <code>InputMethodRequests</code> instance.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="{@docRoot}/java/awt/doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the input method listener
      * @see      java.awt.event.InputMethodEvent
      * @see      java.awt.event.InputMethodListener
      * @see      #removeInputMethodListener
      * @see      #getInputMethodListeners
      * @see      #getInputMethodRequests
      * @since    1.2
      */
     public synchronized void addInputMethodListener(InputMethodListener l) {
         if (l == null) {
             return;
         }
         inputMethodListener = AWTEventMulticaster.add(inputMethodListener, l);
         newEventsOnly = true;
     }

     /**
      * Removes the specified input method listener so that it no longer
      * receives input method events from this component. This method performs
      * no function, nor does it throw an exception, if the listener
      * specified by the argument was not previously added to this component.
      * If listener <code>l</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
      * >AWT Threading Issues</a> for details on AWT's threading model.
      *
      * @param    l   the input method listener
      * @see      java.awt.event.InputMethodEvent
      * @see      java.awt.event.InputMethodListener
      * @see      #addInputMethodListener
      * @see      #getInputMethodListeners
      * @since    1.2
      */
     public synchronized void removeInputMethodListener(InputMethodListener l) {
         if (l == null) {
             return;
         }
         inputMethodListener = AWTEventMulticaster.remove(inputMethodListener, l);
     }

     /**
      * Returns an array of all the input method listeners
      * registered on this component.
      *
      * @return all of this component's <code>InputMethodListener</code>s
      *         or an empty array if no input method
      *         listeners are currently registered
      *
      * @see      #addInputMethodListener
      * @see      #removeInputMethodListener
      * @since    1.4
      */
     public synchronized InputMethodListener[] getInputMethodListeners() {
         return (InputMethodListener[]) (getListeners(InputMethodListener.class));
     }

     /**
      * Returns an array of all the objects currently registered
      * as <code><em>Foo</em>Listener</code>s
      * upon this <code>Component</code>.
      * <code><em>Foo</em>Listener</code>s are registered using the
      * <code>add<em>Foo</em>Listener</code> method.
      *
      * <p>
      * You can specify the <code>listenerType</code> argument
      * with a class literal, such as
      * <code><em>Foo</em>Listener.class</code>.
      * For example, you can query a
      * <code>Component</code> <code>c</code>
      * for its mouse listeners with the following code:
      *
      * <pre>MouseListener[] mls = (MouseListener[])(c.getListeners(MouseListener.class));</pre>
      *
      * If no such listeners exist, this method returns an empty array.
      *
      * @param listenerType the type of listeners requested; this parameter
      *          should specify an interface that descends from
      *          <code>java.util.EventListener</code>
      * @return an array of all objects registered as
      *          <code><em>Foo</em>Listener</code>s on this component,
      *          or an empty array if no such listeners have been added
      * @exception ClassCastException if <code>listenerType</code>
      *          doesn't specify a class or interface that implements
      *          <code>java.util.EventListener</code>
      * @throws NullPointerException if {@code listenerType} is {@code null}
      * @see #getComponentListeners
      * @see #getFocusListeners
      * @see #getHierarchyListeners
      * @see #getHierarchyBoundsListeners
      * @see #getKeyListeners
      * @see #getMouseListeners
      * @see #getMouseMotionListeners
      * @see #getMouseWheelListeners
      * @see #getInputMethodListeners
      * @see #getPropertyChangeListeners
      *
      * @since 1.3
      */
     public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
         EventListener l = null;
         if  (listenerType == ComponentListener.class) {
             l = componentListener;
         } else if (listenerType == FocusListener.class) {
             l = focusListener;
         } else if (listenerType == HierarchyListener.class) {
             l = hierarchyListener;
         } else if (listenerType == HierarchyBoundsListener.class) {
             l = hierarchyBoundsListener;
         } else if (listenerType == KeyListener.class) {
             l = keyListener;
         } else if (listenerType == MouseListener.class) {
             l = mouseListener;
         } else if (listenerType == MouseMotionListener.class) {
             l = mouseMotionListener;
         } else if (listenerType == MouseWheelListener.class) {
             l = mouseWheelListener;
         } else if (listenerType == InputMethodListener.class) {
             l = inputMethodListener;
         } else if (listenerType == PropertyChangeListener.class) {
             return (T[])getPropertyChangeListeners();
         }
         return AWTEventMulticaster.getListeners(l, listenerType);
     }

     /**
      * Gets the input method request handler which supports
      * requests from input methods for this component. A component
      * that supports on-the-spot text input must override this
      * method to return an <code>InputMethodRequests</code> instance.
      * At the same time, it also has to handle input method events.
      *
      * @return the input method request handler for this component,
      *          <code>null</code> by default
      * @see #addInputMethodListener
      * @since 1.2
      */
     public InputMethodRequests getInputMethodRequests() {
         return null;
     }

     /**
      * Gets the input context used by this component for handling
      * the communication with input methods when text is entered
      * in this component. By default, the input context used for
      * the parent component is returned. Components may
      * override this to return a private input context.
      *
      * @return the input context used by this component;
      *          <code>null</code> if no context can be determined
      * @since 1.2
      */
     public InputContext getInputContext() {
         Container parent = this.parent;
         if (parent == null) {
             return null;
         } else {
             return parent.getInputContext();
         }
     }

     /**
      * Enables the events defined by the specified event mask parameter
      * to be delivered to this component.
      * <p>
      * Event types are automatically enabled when a listener for
      * that event type is added to the component.
      * <p>
      * This method only needs to be invoked by subclasses of
      * <code>Component</code> which desire to have the specified event
      * types delivered to <code>processEvent</code> regardless of whether
      * or not a listener is registered.
      * @param      eventsToEnable   the event mask defining the event types
      * @see        #processEvent
      * @see        #disableEvents
      * @see        AWTEvent
      * @since      JDK1.1
      */
     protected final void enableEvents(long eventsToEnable) {
         long notifyAncestors = 0;
         synchronized (this) {
             if ((eventsToEnable & AWTEvent.HIERARCHY_EVENT_MASK) != 0 &&
                 hierarchyListener == null &&
                 (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) == 0) {
                 notifyAncestors |= AWTEvent.HIERARCHY_EVENT_MASK;
             }
             if ((eventsToEnable & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0 &&
                 hierarchyBoundsListener == null &&
                 (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) == 0) {
                 notifyAncestors |= AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK;
             }
             eventMask |= eventsToEnable;
             newEventsOnly = true;
         }

         // if this is a lightweight component, enable mouse events
         // in the native container.
         if (peer instanceof LightweightPeer) {
             parent.proxyEnableEvents(eventMask);
         }
         if (notifyAncestors != 0) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(notifyAncestors, 1);
             }
         }
     }

     /**
      * Disables the events defined by the specified event mask parameter
      * from being delivered to this component.
      * @param      eventsToDisable   the event mask defining the event types
      * @see        #enableEvents
      * @since      JDK1.1
      */
     protected final void disableEvents(long eventsToDisable) {
         long notifyAncestors = 0;
         synchronized (this) {
             if ((eventsToDisable & AWTEvent.HIERARCHY_EVENT_MASK) != 0 &&
                 hierarchyListener == null &&
                 (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0) {
                 notifyAncestors |= AWTEvent.HIERARCHY_EVENT_MASK;
             }
             if ((eventsToDisable & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK)!=0 &&
                 hierarchyBoundsListener == null &&
                 (eventMask & AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK) != 0) {
                 notifyAncestors |= AWTEvent.HIERARCHY_BOUNDS_EVENT_MASK;
             }
             eventMask &= ~eventsToDisable;
         }
         if (notifyAncestors != 0) {
             synchronized (getTreeLock()) {
                 adjustListeningChildrenOnParent(notifyAncestors, -1);
             }
         }
     }

     transient sun.awt.EventQueueItem[] eventCache;

     /**
      * @see #isCoalescingEnabled
      * @see #checkCoalescing
      */
     transient private boolean coalescingEnabled = checkCoalescing();

     /**
      * Weak map of known coalesceEvent overriders.
      * Value indicates whether overriden.
      * Bootstrap classes are not included.
      */
     private static final Map<Class<?>, Boolean> coalesceMap =
         new java.util.WeakHashMap<Class<?>, Boolean>();

     /**
      * Indicates whether this class overrides coalesceEvents.
      * It is assumed that all classes that are loaded from the bootstrap
      *   do not.
      * The boostrap class loader is assumed to be represented by null.
      * We do not check that the method really overrides
      *   (it might be static, private or package private).
      */
      private boolean checkCoalescing() {
          if (getClass().getClassLoader()==null) {
              return false;
          }
          final Class<? extends Component> clazz = getClass();
          synchronized (coalesceMap) {
              // Check cache.
              Boolean value = coalesceMap.get(clazz);
              if (value != null) {
                  return value;
              }

              // Need to check non-bootstraps.
              Boolean enabled = java.security.AccessController.doPrivileged(
                  new java.security.PrivilegedAction<Boolean>() {
                      public Boolean run() {
                          return isCoalesceEventsOverriden(clazz);
                      }
                  }
                  );
              coalesceMap.put(clazz, enabled);
              return enabled;
          }
      }

     /**
      * Parameter types of coalesceEvents(AWTEvent,AWTEVent).
      */
     private static final Class[] coalesceEventsParams = {
         AWTEvent.class, AWTEvent.class
     };

     /**
      * Indicates whether a class or its superclasses override coalesceEvents.
      * Must be called with lock on coalesceMap and privileged.
      * @see checkCoalsecing
      */
     private static boolean isCoalesceEventsOverriden(Class<?> clazz) {
         assert Thread.holdsLock(coalesceMap);

         // First check superclass - we may not need to bother ourselves.
         Class<?> superclass = clazz.getSuperclass();
         if (superclass == null) {
             // Only occurs on implementations that
             //   do not use null to represent the bootsrap class loader.
             return false;
         }
         if (superclass.getClassLoader() != null) {
             Boolean value = coalesceMap.get(superclass);
             if (value == null) {
                 // Not done already - recurse.
                 if (isCoalesceEventsOverriden(superclass)) {
                     coalesceMap.put(superclass, true);
                     return true;
                 }
             } else if (value) {
                 return true;
             }
         }

         try {
             // Throws if not overriden.
             clazz.getDeclaredMethod(
                 "coalesceEvents", coalesceEventsParams
                 );
             return true;
         } catch (NoSuchMethodException e) {
             // Not present in this class.
             return false;
         }
     }

     /**
      * Indicates whether coalesceEvents may do something.
      */
     final boolean isCoalescingEnabled() {
         return coalescingEnabled;
      }


     /**
      * Potentially coalesce an event being posted with an existing
      * event.  This method is called by <code>EventQueue.postEvent</code>
      * if an event with the same ID as the event to be posted is found in
      * the queue (both events must have this component as their source).
      * This method either returns a coalesced event which replaces
      * the existing event (and the new event is then discarded), or
      * <code>null</code> to indicate that no combining should be done
      * (add the second event to the end of the queue).  Either event
      * parameter may be modified and returned, as the other one is discarded
      * unless <code>null</code> is returned.
      * <p>
      * This implementation of <code>coalesceEvents</code> coalesces
      * two event types: mouse move (and drag) events,
      * and paint (and update) events.
      * For mouse move events the last event is always returned, causing
      * intermediate moves to be discarded.  For paint events, the new
      * event is coalesced into a complex <code>RepaintArea</code> in the peer.
      * The new <code>AWTEvent</code> is always returned.
      *
      * @param  existingEvent  the event already on the <code>EventQueue</code>
      * @param  newEvent       the event being posted to the
      *          <code>EventQueue</code>
      * @return a coalesced event, or <code>null</code> indicating that no
      *          coalescing was done
      */
     protected AWTEvent coalesceEvents(AWTEvent existingEvent,
                                       AWTEvent newEvent) {
         return null;
     }

     /**
      * Processes events occurring on this component. By default this
      * method calls the appropriate
      * <code>process&lt;event&nbsp;type&gt;Event</code>
      * method for the given class of event.
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param     e the event
      * @see       #processComponentEvent
      * @see       #processFocusEvent
      * @see       #processKeyEvent
      * @see       #processMouseEvent
      * @see       #processMouseMotionEvent
      * @see       #processInputMethodEvent
      * @see       #processHierarchyEvent
      * @see       #processMouseWheelEvent
      * @since     JDK1.1
      */
     protected void processEvent(AWTEvent e) {
         if (e instanceof FocusEvent) {
             processFocusEvent((FocusEvent)e);

         } else if (e instanceof MouseEvent) {
             switch(e.getID()) {
               case MouseEvent.MOUSE_PRESSED:
               case MouseEvent.MOUSE_RELEASED:
               case MouseEvent.MOUSE_CLICKED:
               case MouseEvent.MOUSE_ENTERED:
               case MouseEvent.MOUSE_EXITED:
                   processMouseEvent((MouseEvent)e);
                   break;
               case MouseEvent.MOUSE_MOVED:
               case MouseEvent.MOUSE_DRAGGED:
                   processMouseMotionEvent((MouseEvent)e);
                   break;
               case MouseEvent.MOUSE_WHEEL:
                   processMouseWheelEvent((MouseWheelEvent)e);
                   break;
             }

         } else if (e instanceof KeyEvent) {
             processKeyEvent((KeyEvent)e);

         } else if (e instanceof ComponentEvent) {
             processComponentEvent((ComponentEvent)e);
         } else if (e instanceof InputMethodEvent) {
             processInputMethodEvent((InputMethodEvent)e);
         } else if (e instanceof HierarchyEvent) {
             switch (e.getID()) {
               case HierarchyEvent.HIERARCHY_CHANGED:
                   processHierarchyEvent((HierarchyEvent)e);
                   break;
               case HierarchyEvent.ANCESTOR_MOVED:
               case HierarchyEvent.ANCESTOR_RESIZED:
                   processHierarchyBoundsEvent((HierarchyEvent)e);
                   break;
             }
         }
     }

     /**
      * Processes component events occurring on this component by
      * dispatching them to any registered
      * <code>ComponentListener</code> objects.
      * <p>
      * This method is not called unless component events are
      * enabled for this component. Component events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>ComponentListener</code> object is registered
      * via <code>addComponentListener</code>.
      * <li>Component events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the component event
      * @see         java.awt.event.ComponentEvent
      * @see         java.awt.event.ComponentListener
      * @see         #addComponentListener
      * @see         #enableEvents
      * @since       JDK1.1
      */
     protected void processComponentEvent(ComponentEvent e) {
         ComponentListener listener = componentListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case ComponentEvent.COMPONENT_RESIZED:
                   listener.componentResized(e);
                   break;
               case ComponentEvent.COMPONENT_MOVED:
                   listener.componentMoved(e);
                   break;
               case ComponentEvent.COMPONENT_SHOWN:
                   listener.componentShown(e);
                   break;
               case ComponentEvent.COMPONENT_HIDDEN:
                   listener.componentHidden(e);
                   break;
             }
         }
     }

     /**
      * Processes focus events occurring on this component by
      * dispatching them to any registered
      * <code>FocusListener</code> objects.
      * <p>
      * This method is not called unless focus events are
      * enabled for this component. Focus events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>FocusListener</code> object is registered
      * via <code>addFocusListener</code>.
      * <li>Focus events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>
      * If focus events are enabled for a <code>Component</code>,
      * the current <code>KeyboardFocusManager</code> determines
      * whether or not a focus event should be dispatched to
      * registered <code>FocusListener</code> objects.  If the
      * events are to be dispatched, the <code>KeyboardFocusManager</code>
      * calls the <code>Component</code>'s <code>dispatchEvent</code>
      * method, which results in a call to the <code>Component</code>'s
      * <code>processFocusEvent</code> method.
      * <p>
      * If focus events are enabled for a <code>Component</code>, calling
      * the <code>Component</code>'s <code>dispatchEvent</code> method
      * with a <code>FocusEvent</code> as the argument will result in a
      * call to the <code>Component</code>'s <code>processFocusEvent</code>
      * method regardless of the current <code>KeyboardFocusManager</code>.
      * <p>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the focus event
      * @see         java.awt.event.FocusEvent
      * @see         java.awt.event.FocusListener
      * @see         java.awt.KeyboardFocusManager
      * @see         #addFocusListener
      * @see         #enableEvents
      * @see         #dispatchEvent
      * @since       JDK1.1
      */
     protected void processFocusEvent(FocusEvent e) {
         FocusListener listener = focusListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case FocusEvent.FOCUS_GAINED:
                   listener.focusGained(e);
                   break;
               case FocusEvent.FOCUS_LOST:
                   listener.focusLost(e);
                   break;
             }
         }
     }

     /**
      * Processes key events occurring on this component by
      * dispatching them to any registered
      * <code>KeyListener</code> objects.
      * <p>
      * This method is not called unless key events are
      * enabled for this component. Key events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>KeyListener</code> object is registered
      * via <code>addKeyListener</code>.
      * <li>Key events are enabled via <code>enableEvents</code>.
      * </ul>
      *
      * <p>
      * If key events are enabled for a <code>Component</code>,
      * the current <code>KeyboardFocusManager</code> determines
      * whether or not a key event should be dispatched to
      * registered <code>KeyListener</code> objects.  The
      * <code>DefaultKeyboardFocusManager</code> will not dispatch
      * key events to a <code>Component</code> that is not the focus
      * owner or is not showing.
      * <p>
      * As of J2SE 1.4, <code>KeyEvent</code>s are redirected to
      * the focus owner. Please see the
      * <a href="doc-files/FocusSpec.html">Focus Specification</a>
      * for further information.
      * <p>
      * Calling a <code>Component</code>'s <code>dispatchEvent</code>
      * method with a <code>KeyEvent</code> as the argument will
      * result in a call to the <code>Component</code>'s
      * <code>processKeyEvent</code> method regardless of the
      * current <code>KeyboardFocusManager</code> as long as the
      * component is showing, focused, and enabled, and key events
      * are enabled on it.
      * <p>If the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the key event
      * @see         java.awt.event.KeyEvent
      * @see         java.awt.event.KeyListener
      * @see         java.awt.KeyboardFocusManager
      * @see         java.awt.DefaultKeyboardFocusManager
      * @see         #processEvent
      * @see         #dispatchEvent
      * @see         #addKeyListener
      * @see         #enableEvents
      * @see         #isShowing
      * @since       JDK1.1
      */
     protected void processKeyEvent(KeyEvent e) {
         KeyListener listener = keyListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case KeyEvent.KEY_TYPED:
                   listener.keyTyped(e);
                   break;
               case KeyEvent.KEY_PRESSED:
                   listener.keyPressed(e);
                   break;
               case KeyEvent.KEY_RELEASED:
                   listener.keyReleased(e);
                   break;
             }
         }
     }

     /**
      * Processes mouse events occurring on this component by
      * dispatching them to any registered
      * <code>MouseListener</code> objects.
      * <p>
      * This method is not called unless mouse events are
      * enabled for this component. Mouse events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>MouseListener</code> object is registered
      * via <code>addMouseListener</code>.
      * <li>Mouse events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the mouse event
      * @see         java.awt.event.MouseEvent
      * @see         java.awt.event.MouseListener
      * @see         #addMouseListener
      * @see         #enableEvents
      * @since       JDK1.1
      */
     protected void processMouseEvent(MouseEvent e) {
         MouseListener listener = mouseListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case MouseEvent.MOUSE_PRESSED:
                   listener.mousePressed(e);
                   break;
               case MouseEvent.MOUSE_RELEASED:
                   listener.mouseReleased(e);
                   break;
               case MouseEvent.MOUSE_CLICKED:
                   listener.mouseClicked(e);
                   break;
               case MouseEvent.MOUSE_EXITED:
                   listener.mouseExited(e);
                   break;
               case MouseEvent.MOUSE_ENTERED:
                   listener.mouseEntered(e);
                   break;
             }
         }
     }

     /**
      * Processes mouse motion events occurring on this component by
      * dispatching them to any registered
      * <code>MouseMotionListener</code> objects.
      * <p>
      * This method is not called unless mouse motion events are
      * enabled for this component. Mouse motion events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>MouseMotionListener</code> object is registered
      * via <code>addMouseMotionListener</code>.
      * <li>Mouse motion events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the mouse motion event
      * @see         java.awt.event.MouseEvent
      * @see         java.awt.event.MouseMotionListener
      * @see         #addMouseMotionListener
      * @see         #enableEvents
      * @since       JDK1.1
      */
     protected void processMouseMotionEvent(MouseEvent e) {
         MouseMotionListener listener = mouseMotionListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case MouseEvent.MOUSE_MOVED:
                   listener.mouseMoved(e);
                   break;
               case MouseEvent.MOUSE_DRAGGED:
                   listener.mouseDragged(e);
                   break;
             }
         }
     }

     /**
      * Processes mouse wheel events occurring on this component by
      * dispatching them to any registered
      * <code>MouseWheelListener</code> objects.
      * <p>
      * This method is not called unless mouse wheel events are
      * enabled for this component. Mouse wheel events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>A <code>MouseWheelListener</code> object is registered
      * via <code>addMouseWheelListener</code>.
      * <li>Mouse wheel events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>
      * For information on how mouse wheel events are dispatched, see
      * the class description for {@link MouseWheelEvent}.
      * <p>
      * Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the mouse wheel event
      * @see         java.awt.event.MouseWheelEvent
      * @see         java.awt.event.MouseWheelListener
      * @see         #addMouseWheelListener
      * @see         #enableEvents
      * @since       1.4
      */
     protected void processMouseWheelEvent(MouseWheelEvent e) {
         MouseWheelListener listener = mouseWheelListener;
         if (listener != null) {
             int id = e.getID();
             switch(id) {
               case MouseEvent.MOUSE_WHEEL:
                   listener.mouseWheelMoved(e);
                   break;
             }
         }
     }

     boolean postsOldMouseEvents() {
         return false;
     }

     /**
      * Processes input method events occurring on this component by
      * dispatching them to any registered
      * <code>InputMethodListener</code> objects.
      * <p>
      * This method is not called unless input method events
      * are enabled for this component. Input method events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>An <code>InputMethodListener</code> object is registered
      * via <code>addInputMethodListener</code>.
      * <li>Input method events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the input method event
      * @see         java.awt.event.InputMethodEvent
      * @see         java.awt.event.InputMethodListener
      * @see         #addInputMethodListener
      * @see         #enableEvents
      * @since       1.2
      */
     protected void processInputMethodEvent(InputMethodEvent e) {
         InputMethodListener listener = inputMethodListener;
         if (listener != null) {
             int id = e.getID();
             switch (id) {
               case InputMethodEvent.INPUT_METHOD_TEXT_CHANGED:
                   listener.inputMethodTextChanged(e);
                   break;
               case InputMethodEvent.CARET_POSITION_CHANGED:
                   listener.caretPositionChanged(e);
                   break;
             }
         }
     }

     /**
      * Processes hierarchy events occurring on this component by
      * dispatching them to any registered
      * <code>HierarchyListener</code> objects.
      * <p>
      * This method is not called unless hierarchy events
      * are enabled for this component. Hierarchy events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>An <code>HierarchyListener</code> object is registered
      * via <code>addHierarchyListener</code>.
      * <li>Hierarchy events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the hierarchy event
      * @see         java.awt.event.HierarchyEvent
      * @see         java.awt.event.HierarchyListener
      * @see         #addHierarchyListener
      * @see         #enableEvents
      * @since       1.3
      */
     protected void processHierarchyEvent(HierarchyEvent e) {
         HierarchyListener listener = hierarchyListener;
         if (listener != null) {
             int id = e.getID();
             switch (id) {
               case HierarchyEvent.HIERARCHY_CHANGED:
                   listener.hierarchyChanged(e);
                   break;
             }
         }
     }

     /**
      * Processes hierarchy bounds events occurring on this component by
      * dispatching them to any registered
      * <code>HierarchyBoundsListener</code> objects.
      * <p>
      * This method is not called unless hierarchy bounds events
      * are enabled for this component. Hierarchy bounds events are enabled
      * when one of the following occurs:
      * <p><ul>
      * <li>An <code>HierarchyBoundsListener</code> object is registered
      * via <code>addHierarchyBoundsListener</code>.
      * <li>Hierarchy bounds events are enabled via <code>enableEvents</code>.
      * </ul>
      * <p>Note that if the event parameter is <code>null</code>
      * the behavior is unspecified and may result in an
      * exception.
      *
      * @param       e the hierarchy event
      * @see         java.awt.event.HierarchyEvent
      * @see         java.awt.event.HierarchyBoundsListener
      * @see         #addHierarchyBoundsListener
      * @see         #enableEvents
      * @since       1.3
      */
     protected void processHierarchyBoundsEvent(HierarchyEvent e) {
         HierarchyBoundsListener listener = hierarchyBoundsListener;
         if (listener != null) {
             int id = e.getID();
             switch (id) {
               case HierarchyEvent.ANCESTOR_MOVED:
                   listener.ancestorMoved(e);
                   break;
               case HierarchyEvent.ANCESTOR_RESIZED:
                   listener.ancestorResized(e);
                   break;
             }
         }
     }

     /**
      * @deprecated As of JDK version 1.1
      * replaced by processEvent(AWTEvent).
      */
     @Deprecated
     public boolean handleEvent(Event evt) {
         switch (evt.id) {
           case Event.MOUSE_ENTER:
               return mouseEnter(evt, evt.x, evt.y);

           case Event.MOUSE_EXIT:
               return mouseExit(evt, evt.x, evt.y);

           case Event.MOUSE_MOVE:
               return mouseMove(evt, evt.x, evt.y);

           case Event.MOUSE_DOWN:
               return mouseDown(evt, evt.x, evt.y);

           case Event.MOUSE_DRAG:
               return mouseDrag(evt, evt.x, evt.y);

           case Event.MOUSE_UP:
               return mouseUp(evt, evt.x, evt.y);

           case Event.KEY_PRESS:
           case Event.KEY_ACTION:
               return keyDown(evt, evt.key);

           case Event.KEY_RELEASE:
           case Event.KEY_ACTION_RELEASE:
               return keyUp(evt, evt.key);

           case Event.ACTION_EVENT:
               return action(evt, evt.arg);
           case Event.GOT_FOCUS:
               return gotFocus(evt, evt.arg);
           case Event.LOST_FOCUS:
               return lostFocus(evt, evt.arg);
         }
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseDown(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseMotionEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseDrag(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseUp(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseMotionEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseMove(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseEnter(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processMouseEvent(MouseEvent).
      */
     @Deprecated
     public boolean mouseExit(Event evt, int x, int y) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processKeyEvent(KeyEvent).
      */
     @Deprecated
     public boolean keyDown(Event evt, int key) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processKeyEvent(KeyEvent).
      */
     @Deprecated
     public boolean keyUp(Event evt, int key) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * should register this component as ActionListener on component
      * which fires action events.
      */
     @Deprecated
     public boolean action(Event evt, Object what) {
         return false;
     }

     /**
      * Makes this <code>Component</code> displayable by connecting it to a
      * native screen resource.
      * This method is called internally by the toolkit and should
      * not be called directly by programs.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      * @see       #isDisplayable
      * @see       #removeNotify
      * @see #invalidate
      * @since JDK1.0
      */
     public void addNotify() {
         synchronized (getTreeLock()) {
             ComponentPeer peer = this.peer;
             if (peer == null || peer instanceof LightweightPeer){
                 if (peer == null) {
                     // Update both the Component's peer variable and the local
                     // variable we use for thread safety.
                     this.peer = peer = getToolkit().createComponent(this);
                 }

                 // This is a lightweight component which means it won't be
                 // able to get window-related events by itself.  If any
                 // have been enabled, then the nearest native container must
                 // be enabled.
                 if (parent != null) {
                     long mask = 0;
                     if ((mouseListener != null) || ((eventMask & AWTEvent.MOUSE_EVENT_MASK) != 0)) {
                         mask |= AWTEvent.MOUSE_EVENT_MASK;
                     }
                     if ((mouseMotionListener != null) ||
                         ((eventMask & AWTEvent.MOUSE_MOTION_EVENT_MASK) != 0)) {
                         mask |= AWTEvent.MOUSE_MOTION_EVENT_MASK;
                     }
                     if ((mouseWheelListener != null ) ||
                         ((eventMask & AWTEvent.MOUSE_WHEEL_EVENT_MASK) != 0)) {
                         mask |= AWTEvent.MOUSE_WHEEL_EVENT_MASK;
                     }
                     if (focusListener != null || (eventMask & AWTEvent.FOCUS_EVENT_MASK) != 0) {
                         mask |= AWTEvent.FOCUS_EVENT_MASK;
                     }
                     if (keyListener != null || (eventMask & AWTEvent.KEY_EVENT_MASK) != 0) {
                         mask |= AWTEvent.KEY_EVENT_MASK;
                     }
                     if (mask != 0) {
                         parent.proxyEnableEvents(mask);
                     }
                 }
             } else {
                 // It's native. If the parent is lightweight it will need some
                 // help.
                 Container parent = getContainer();
                 if (parent != null && parent.isLightweight()) {
                     relocateComponent();
                     if (!parent.isRecursivelyVisibleUpToHeavyweightContainer())
                     {
                         peer.setVisible(false);
                     }
                 }
             }
             invalidate();

             int npopups = (popups != null? popups.size() : 0);
             for (int i = 0 ; i < npopups ; i++) {
                 PopupMenu popup = (PopupMenu)popups.elementAt(i);
                 popup.addNotify();
             }

             if (dropTarget != null) dropTarget.addNotify(peer);

             peerFont = getFont();

             if (getContainer() != null && !isAddNotifyComplete) {
                 getContainer().increaseComponentCount(this);
             }


             // Update stacking order
             updateZOrder();

             if (!isAddNotifyComplete) {
                 mixOnShowing();
             }

             isAddNotifyComplete = true;

             if (hierarchyListener != null ||
                 (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 ||
                 Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK)) {
                 HierarchyEvent e =
                     new HierarchyEvent(this, HierarchyEvent.HIERARCHY_CHANGED,
                                        this, parent,
                                        HierarchyEvent.DISPLAYABILITY_CHANGED |
                                        ((isRecursivelyVisible())
                                         ? HierarchyEvent.SHOWING_CHANGED
                                         : 0));
                 dispatchEvent(e);
             }
         }
     }

     /**
      * Makes this <code>Component</code> undisplayable by destroying it native
      * screen resource.
      * <p>
      * This method is called by the toolkit internally and should
      * not be called directly by programs. Code overriding
      * this method should call <code>super.removeNotify</code> as
      * the first line of the overriding method.
      *
      * @see       #isDisplayable
      * @see       #addNotify
      * @since JDK1.0
      */
     public void removeNotify() {
         KeyboardFocusManager.clearMostRecentFocusOwner(this);
         if (KeyboardFocusManager.getCurrentKeyboardFocusManager().
             getPermanentFocusOwner() == this)
         {
             KeyboardFocusManager.getCurrentKeyboardFocusManager().
                 setGlobalPermanentFocusOwner(null);
         }

         synchronized (getTreeLock()) {
             if (isFocusOwner() && KeyboardFocusManager.isAutoFocusTransferEnabledFor(this)) {
                 transferFocus(true);
             }

             if (getContainer() != null && isAddNotifyComplete) {
                 getContainer().decreaseComponentCount(this);
             }

             int npopups = (popups != null? popups.size() : 0);
             for (int i = 0 ; i < npopups ; i++) {
                 PopupMenu popup = (PopupMenu)popups.elementAt(i);
                 popup.removeNotify();
             }
             // If there is any input context for this component, notify
             // that this component is being removed. (This has to be done
             // before hiding peer.)
             if ((eventMask & AWTEvent.INPUT_METHODS_ENABLED_MASK) != 0) {
                 InputContext inputContext = getInputContext();
                 if (inputContext != null) {
                     inputContext.removeNotify(this);
                 }
             }

             ComponentPeer p = peer;
             if (p != null) {
                 boolean isLightweight = isLightweight();

                 if (bufferStrategy instanceof FlipBufferStrategy) {
                     ((FlipBufferStrategy)bufferStrategy).destroyBuffers();
                 }

                 if (dropTarget != null) dropTarget.removeNotify(peer);

                 // Hide peer first to stop system events such as cursor moves.
                 if (visible) {
                     p.setVisible(false);
                 }

                 peer = null; // Stop peer updates.
                 peerFont = null;

                 Toolkit.getEventQueue().removeSourceEvents(this, false);
                 KeyboardFocusManager.getCurrentKeyboardFocusManager().
                     discardKeyEvents(this);

                 p.dispose();

                 mixOnHiding(isLightweight);

                 isAddNotifyComplete = false;
                 // Nullifying compoundShape means that the component has normal shape
                 // (or has no shape at all).
                 this.compoundShape = null;
             }

             if (hierarchyListener != null ||
                 (eventMask & AWTEvent.HIERARCHY_EVENT_MASK) != 0 ||
                 Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK)) {
                 HierarchyEvent e =
                     new HierarchyEvent(this, HierarchyEvent.HIERARCHY_CHANGED,
                                        this, parent,
                                        HierarchyEvent.DISPLAYABILITY_CHANGED |
                                        ((isRecursivelyVisible())
                                         ? HierarchyEvent.SHOWING_CHANGED
                                         : 0));
                 dispatchEvent(e);
             }
         }
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processFocusEvent(FocusEvent).
      */
     @Deprecated
     public boolean gotFocus(Event evt, Object what) {
         return false;
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by processFocusEvent(FocusEvent).
      */
     @Deprecated
     public boolean lostFocus(Event evt, Object what) {
         return false;
     }

     /**
      * Returns whether this <code>Component</code> can become the focus
      * owner.
      *
      * @return <code>true</code> if this <code>Component</code> is
      * focusable; <code>false</code> otherwise
      * @see #setFocusable
      * @since JDK1.1
      * @deprecated As of 1.4, replaced by <code>isFocusable()</code>.
      */
     @Deprecated
     public boolean isFocusTraversable() {
         if (isFocusTraversableOverridden == FOCUS_TRAVERSABLE_UNKNOWN) {
             isFocusTraversableOverridden = FOCUS_TRAVERSABLE_DEFAULT;
         }
         return focusable;
     }

     /**
      * Returns whether this Component can be focused.
      *
      * @return <code>true</code> if this Component is focusable;
      *         <code>false</code> otherwise.
      * @see #setFocusable
      * @since 1.4
      */
     public boolean isFocusable() {
         return isFocusTraversable();
     }

     /**
      * Sets the focusable state of this Component to the specified value. This
      * value overrides the Component's default focusability.
      *
      * @param focusable indicates whether this Component is focusable
      * @see #isFocusable
      * @since 1.4
      * @beaninfo
      *       bound: true
      */
     public void setFocusable(boolean focusable) {
         boolean oldFocusable;
         synchronized (this) {
             oldFocusable = this.focusable;
             this.focusable = focusable;
         }
         isFocusTraversableOverridden = FOCUS_TRAVERSABLE_SET;

         firePropertyChange("focusable", oldFocusable, focusable);
         if (oldFocusable && !focusable) {
             if (isFocusOwner() && KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                 transferFocus(true);
             }
             KeyboardFocusManager.clearMostRecentFocusOwner(this);
         }
     }

     final boolean isFocusTraversableOverridden() {
         return (isFocusTraversableOverridden != FOCUS_TRAVERSABLE_DEFAULT);
     }

     /**
      * Sets the focus traversal keys for a given traversal operation for this
      * Component.
      * <p>
      * The default values for a Component's focus traversal keys are
      * implementation-dependent. Sun recommends that all implementations for a
      * particular native platform use the same default values. The
      * recommendations for Windows and Unix are listed below. These
      * recommendations are used in the Sun AWT implementations.
      *
      * <table border=1 summary="Recommended default values for a Component's focus traversal keys">
      * <tr>
      *    <th>Identifier</th>
      *    <th>Meaning</th>
      *    <th>Default</th>
      * </tr>
      * <tr>
      *    <td>KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS</td>
      *    <td>Normal forward keyboard traversal</td>
      *    <td>TAB on KEY_PRESSED, CTRL-TAB on KEY_PRESSED</td>
      * </tr>
      * <tr>
      *    <td>KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS</td>
      *    <td>Normal reverse keyboard traversal</td>
      *    <td>SHIFT-TAB on KEY_PRESSED, CTRL-SHIFT-TAB on KEY_PRESSED</td>
      * </tr>
      * <tr>
      *    <td>KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS</td>
      *    <td>Go up one focus traversal cycle</td>
      *    <td>none</td>
      * </tr>
      * </table>
      *
      * To disable a traversal key, use an empty Set; Collections.EMPTY_SET is
      * recommended.
      * <p>
      * Using the AWTKeyStroke API, client code can specify on which of two
      * specific KeyEvents, KEY_PRESSED or KEY_RELEASED, the focus traversal
      * operation will occur. Regardless of which KeyEvent is specified,
      * however, all KeyEvents related to the focus traversal key, including the
      * associated KEY_TYPED event, will be consumed, and will not be dispatched
      * to any Component. It is a runtime error to specify a KEY_TYPED event as
      * mapping to a focus traversal operation, or to map the same event to
      * multiple default focus traversal operations.
      * <p>
      * If a value of null is specified for the Set, this Component inherits the
      * Set from its parent. If all ancestors of this Component have null
      * specified for the Set, then the current KeyboardFocusManager's default
      * Set is used.
      *
      * @param id one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *        KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *        KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
      * @param keystrokes the Set of AWTKeyStroke for the specified operation
      * @see #getFocusTraversalKeys
      * @see KeyboardFocusManager#FORWARD_TRAVERSAL_KEYS
      * @see KeyboardFocusManager#BACKWARD_TRAVERSAL_KEYS
      * @see KeyboardFocusManager#UP_CYCLE_TRAVERSAL_KEYS
      * @throws IllegalArgumentException if id is not one of
      *         KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *         KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *         KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or if keystrokes
      *         contains null, or if any Object in keystrokes is not an
      *         AWTKeyStroke, or if any keystroke represents a KEY_TYPED event,
      *         or if any keystroke already maps to another focus traversal
      *         operation for this Component
      * @since 1.4
      * @beaninfo
      *       bound: true
      */
     public void setFocusTraversalKeys(int id,
                                       Set<? extends AWTKeyStroke> keystrokes)
     {
         if (id < 0 || id >= KeyboardFocusManager.TRAVERSAL_KEY_LENGTH - 1) {
             throw new IllegalArgumentException("invalid focus traversal key identifier");
         }

         setFocusTraversalKeys_NoIDCheck(id, keystrokes);
     }

     /**
      * Returns the Set of focus traversal keys for a given traversal operation
      * for this Component. (See
      * <code>setFocusTraversalKeys</code> for a full description of each key.)
      * <p>
      * If a Set of traversal keys has not been explicitly defined for this
      * Component, then this Component's parent's Set is returned. If no Set
      * has been explicitly defined for any of this Component's ancestors, then
      * the current KeyboardFocusManager's default Set is returned.
      *
      * @param id one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *        KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *        KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
      * @return the Set of AWTKeyStrokes for the specified operation. The Set
      *         will be unmodifiable, and may be empty. null will never be
      *         returned.
      * @see #setFocusTraversalKeys
      * @see KeyboardFocusManager#FORWARD_TRAVERSAL_KEYS
      * @see KeyboardFocusManager#BACKWARD_TRAVERSAL_KEYS
      * @see KeyboardFocusManager#UP_CYCLE_TRAVERSAL_KEYS
      * @throws IllegalArgumentException if id is not one of
      *         KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *         KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *         KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
      * @since 1.4
      */
     public Set<AWTKeyStroke> getFocusTraversalKeys(int id) {
         if (id < 0 || id >= KeyboardFocusManager.TRAVERSAL_KEY_LENGTH - 1) {
             throw new IllegalArgumentException("invalid focus traversal key identifier");
         }

         return getFocusTraversalKeys_NoIDCheck(id);
     }

     // We define these methods so that Container does not need to repeat this
     // code. Container cannot call super.<method> because Container allows
     // DOWN_CYCLE_TRAVERSAL_KEY while Component does not. The Component method
     // would erroneously generate an IllegalArgumentException for
     // DOWN_CYCLE_TRAVERSAL_KEY.
     final void setFocusTraversalKeys_NoIDCheck(int id, Set<? extends AWTKeyStroke> keystrokes) {
         Set oldKeys;

         synchronized (this) {
             if (focusTraversalKeys == null) {
                 initializeFocusTraversalKeys();
             }

             if (keystrokes != null) {
                 for (Iterator iter = keystrokes.iterator(); iter.hasNext(); ) {
                     Object obj = iter.next();

                     if (obj == null) {
                         throw new IllegalArgumentException("cannot set null focus traversal key");
                     }

                     // Fix for 6195828:
                     //According to javadoc this method should throw IAE instead of ClassCastException
                     if (!(obj instanceof AWTKeyStroke)) {
                         throw new IllegalArgumentException("object is expected to be AWTKeyStroke");
                     }
                     AWTKeyStroke keystroke = (AWTKeyStroke)obj;

                     if (keystroke.getKeyChar() != KeyEvent.CHAR_UNDEFINED) {
                         throw new IllegalArgumentException("focus traversal keys cannot map to KEY_TYPED events");
                     }

                     for (int i = 0; i < focusTraversalKeys.length; i++) {
                         if (i == id) {
                             continue;
                         }

                         if (getFocusTraversalKeys_NoIDCheck(i).contains(keystroke))
                         {
                             throw new IllegalArgumentException("focus traversal keys must be unique for a Component");
                         }
                     }
                 }
             }

             oldKeys = focusTraversalKeys[id];
             focusTraversalKeys[id] = (keystrokes != null)
                 ? Collections.unmodifiableSet(new HashSet(keystrokes))
                 : null;
         }

         firePropertyChange(focusTraversalKeyPropertyNames[id], oldKeys,
                            keystrokes);
     }
     final Set getFocusTraversalKeys_NoIDCheck(int id) {
         // Okay to return Set directly because it is an unmodifiable view
         Set keystrokes = (focusTraversalKeys != null)
             ? focusTraversalKeys[id]
             : null;

         if (keystrokes != null) {
             return keystrokes;
         } else {
             Container parent = this.parent;
             if (parent != null) {
                 return parent.getFocusTraversalKeys(id);
             } else {
                 return KeyboardFocusManager.getCurrentKeyboardFocusManager().
                     getDefaultFocusTraversalKeys(id);
             }
         }
     }

     /**
      * Returns whether the Set of focus traversal keys for the given focus
      * traversal operation has been explicitly defined for this Component. If
      * this method returns <code>false</code>, this Component is inheriting the
      * Set from an ancestor, or from the current KeyboardFocusManager.
      *
      * @param id one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *        KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *        KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
      * @return <code>true</code> if the the Set of focus traversal keys for the
      *         given focus traversal operation has been explicitly defined for
      *         this Component; <code>false</code> otherwise.
      * @throws IllegalArgumentException if id is not one of
      *         KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *         KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS, or
      *         KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS
      * @since 1.4
      */
     public boolean areFocusTraversalKeysSet(int id) {
         if (id < 0 || id >= KeyboardFocusManager.TRAVERSAL_KEY_LENGTH - 1) {
             throw new IllegalArgumentException("invalid focus traversal key identifier");
         }

         return (focusTraversalKeys != null && focusTraversalKeys[id] != null);
     }

     /**
      * Sets whether focus traversal keys are enabled for this Component.
      * Components for which focus traversal keys are disabled receive key
      * events for focus traversal keys. Components for which focus traversal
      * keys are enabled do not see these events; instead, the events are
      * automatically converted to traversal operations.
      *
      * @param focusTraversalKeysEnabled whether focus traversal keys are
      *        enabled for this Component
      * @see #getFocusTraversalKeysEnabled
      * @see #setFocusTraversalKeys
      * @see #getFocusTraversalKeys
      * @since 1.4
      * @beaninfo
      *       bound: true
      */
     public void setFocusTraversalKeysEnabled(boolean
                                              focusTraversalKeysEnabled) {
         boolean oldFocusTraversalKeysEnabled;
         synchronized (this) {
             oldFocusTraversalKeysEnabled = this.focusTraversalKeysEnabled;
             this.focusTraversalKeysEnabled = focusTraversalKeysEnabled;
         }
         firePropertyChange("focusTraversalKeysEnabled",
                            oldFocusTraversalKeysEnabled,
                            focusTraversalKeysEnabled);
     }

     /**
      * Returns whether focus traversal keys are enabled for this Component.
      * Components for which focus traversal keys are disabled receive key
      * events for focus traversal keys. Components for which focus traversal
      * keys are enabled do not see these events; instead, the events are
      * automatically converted to traversal operations.
      *
      * @return whether focus traversal keys are enabled for this Component
      * @see #setFocusTraversalKeysEnabled
      * @see #setFocusTraversalKeys
      * @see #getFocusTraversalKeys
      * @since 1.4
      */
     public boolean getFocusTraversalKeysEnabled() {
         return focusTraversalKeysEnabled;
     }

     /**
      * Requests that this Component get the input focus, and that this
      * Component's top-level ancestor become the focused Window. This
      * component must be displayable, focusable, visible and all of
      * its ancestors (with the exception of the top-level Window) must
      * be visible for the request to be granted. Every effort will be
      * made to honor the request; however, in some cases it may be
      * impossible to do so. Developers must never assume that this
      * Component is the focus owner until this Component receives a
      * FOCUS_GAINED event. If this request is denied because this
      * Component's top-level Window cannot become the focused Window,
      * the request will be remembered and will be granted when the
      * Window is later focused by the user.
      * <p>
      * This method cannot be used to set the focus owner to no Component at
      * all. Use <code>KeyboardFocusManager.clearGlobalFocusOwner()</code>
      * instead.
      * <p>
      * Because the focus behavior of this method is platform-dependent,
      * developers are strongly encouraged to use
      * <code>requestFocusInWindow</code> when possible.
      *
      * <p>Note: Not all focus transfers result from invoking this method. As
      * such, a component may receive focus without this or any of the other
      * {@code requestFocus} methods of {@code Component} being invoked.
      *
      * @see #requestFocusInWindow
      * @see java.awt.event.FocusEvent
      * @see #addFocusListener
      * @see #isFocusable
      * @see #isDisplayable
      * @see KeyboardFocusManager#clearGlobalFocusOwner
      * @since JDK1.0
      */
     public void requestFocus() {
         requestFocusHelper(false, true);
     }

     boolean requestFocus(CausedFocusEvent.Cause cause) {
         return requestFocusHelper(false, true, cause);
     }

     /**
      * Requests that this <code>Component</code> get the input focus,
      * and that this <code>Component</code>'s top-level ancestor
      * become the focused <code>Window</code>. This component must be
      * displayable, focusable, visible and all of its ancestors (with
      * the exception of the top-level Window) must be visible for the
      * request to be granted. Every effort will be made to honor the
      * request; however, in some cases it may be impossible to do
      * so. Developers must never assume that this component is the
      * focus owner until this component receives a FOCUS_GAINED
      * event. If this request is denied because this component's
      * top-level window cannot become the focused window, the request
      * will be remembered and will be granted when the window is later
      * focused by the user.
      * <p>
      * This method returns a boolean value. If <code>false</code> is returned,
      * the request is <b>guaranteed to fail</b>. If <code>true</code> is
      * returned, the request will succeed <b>unless</b> it is vetoed, or an
      * extraordinary event, such as disposal of the component's peer, occurs
      * before the request can be granted by the native windowing system. Again,
      * while a return value of <code>true</code> indicates that the request is
      * likely to succeed, developers must never assume that this component is
      * the focus owner until this component receives a FOCUS_GAINED event.
      * <p>
      * This method cannot be used to set the focus owner to no component at
      * all. Use <code>KeyboardFocusManager.clearGlobalFocusOwner</code>
      * instead.
      * <p>
      * Because the focus behavior of this method is platform-dependent,
      * developers are strongly encouraged to use
      * <code>requestFocusInWindow</code> when possible.
      * <p>
      * Every effort will be made to ensure that <code>FocusEvent</code>s
      * generated as a
      * result of this request will have the specified temporary value. However,
      * because specifying an arbitrary temporary state may not be implementable
      * on all native windowing systems, correct behavior for this method can be
      * guaranteed only for lightweight <code>Component</code>s.
      * This method is not intended
      * for general use, but exists instead as a hook for lightweight component
      * libraries, such as Swing.
      *
      * <p>Note: Not all focus transfers result from invoking this method. As
      * such, a component may receive focus without this or any of the other
      * {@code requestFocus} methods of {@code Component} being invoked.
      *
      * @param temporary true if the focus change is temporary,
      *        such as when the window loses the focus; for
      *        more information on temporary focus changes see the
      *<a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
      * @return <code>false</code> if the focus change request is guaranteed to
      *         fail; <code>true</code> if it is likely to succeed
      * @see java.awt.event.FocusEvent
      * @see #addFocusListener
      * @see #isFocusable
      * @see #isDisplayable
      * @see KeyboardFocusManager#clearGlobalFocusOwner
      * @since 1.4
      */
     protected boolean requestFocus(boolean temporary) {
         return requestFocusHelper(temporary, true);
     }

     boolean requestFocus(boolean temporary, CausedFocusEvent.Cause cause) {
         return requestFocusHelper(temporary, true, cause);
     }
     /**
      * Requests that this Component get the input focus, if this
      * Component's top-level ancestor is already the focused
      * Window. This component must be displayable, focusable, visible
      * and all of its ancestors (with the exception of the top-level
      * Window) must be visible for the request to be granted. Every
      * effort will be made to honor the request; however, in some
      * cases it may be impossible to do so. Developers must never
      * assume that this Component is the focus owner until this
      * Component receives a FOCUS_GAINED event.
      * <p>
      * This method returns a boolean value. If <code>false</code> is returned,
      * the request is <b>guaranteed to fail</b>. If <code>true</code> is
      * returned, the request will succeed <b>unless</b> it is vetoed, or an
      * extraordinary event, such as disposal of the Component's peer, occurs
      * before the request can be granted by the native windowing system. Again,
      * while a return value of <code>true</code> indicates that the request is
      * likely to succeed, developers must never assume that this Component is
      * the focus owner until this Component receives a FOCUS_GAINED event.
      * <p>
      * This method cannot be used to set the focus owner to no Component at
      * all. Use <code>KeyboardFocusManager.clearGlobalFocusOwner()</code>
      * instead.
      * <p>
      * The focus behavior of this method can be implemented uniformly across
      * platforms, and thus developers are strongly encouraged to use this
      * method over <code>requestFocus</code> when possible. Code which relies
      * on <code>requestFocus</code> may exhibit different focus behavior on
      * different platforms.
      *
      * <p>Note: Not all focus transfers result from invoking this method. As
      * such, a component may receive focus without this or any of the other
      * {@code requestFocus} methods of {@code Component} being invoked.
      *
      * @return <code>false</code> if the focus change request is guaranteed to
      *         fail; <code>true</code> if it is likely to succeed
      * @see #requestFocus
      * @see java.awt.event.FocusEvent
      * @see #addFocusListener
      * @see #isFocusable
      * @see #isDisplayable
      * @see KeyboardFocusManager#clearGlobalFocusOwner
      * @since 1.4
      */
     public boolean requestFocusInWindow() {
         return requestFocusHelper(false, false);
     }

     boolean requestFocusInWindow(CausedFocusEvent.Cause cause) {
         return requestFocusHelper(false, false, cause);
     }

     /**
      * Requests that this <code>Component</code> get the input focus,
      * if this <code>Component</code>'s top-level ancestor is already
      * the focused <code>Window</code>.  This component must be
      * displayable, focusable, visible and all of its ancestors (with
      * the exception of the top-level Window) must be visible for the
      * request to be granted. Every effort will be made to honor the
      * request; however, in some cases it may be impossible to do
      * so. Developers must never assume that this component is the
      * focus owner until this component receives a FOCUS_GAINED event.
      * <p>
      * This method returns a boolean value. If <code>false</code> is returned,
      * the request is <b>guaranteed to fail</b>. If <code>true</code> is
      * returned, the request will succeed <b>unless</b> it is vetoed, or an
      * extraordinary event, such as disposal of the component's peer, occurs
      * before the request can be granted by the native windowing system. Again,
      * while a return value of <code>true</code> indicates that the request is
      * likely to succeed, developers must never assume that this component is
      * the focus owner until this component receives a FOCUS_GAINED event.
      * <p>
      * This method cannot be used to set the focus owner to no component at
      * all. Use <code>KeyboardFocusManager.clearGlobalFocusOwner</code>
      * instead.
      * <p>
      * The focus behavior of this method can be implemented uniformly across
      * platforms, and thus developers are strongly encouraged to use this
      * method over <code>requestFocus</code> when possible. Code which relies
      * on <code>requestFocus</code> may exhibit different focus behavior on
      * different platforms.
      * <p>
      * Every effort will be made to ensure that <code>FocusEvent</code>s
      * generated as a
      * result of this request will have the specified temporary value. However,
      * because specifying an arbitrary temporary state may not be implementable
      * on all native windowing systems, correct behavior for this method can be
      * guaranteed only for lightweight components. This method is not intended
      * for general use, but exists instead as a hook for lightweight component
      * libraries, such as Swing.
      *
      * <p>Note: Not all focus transfers result from invoking this method. As
      * such, a component may receive focus without this or any of the other
      * {@code requestFocus} methods of {@code Component} being invoked.
      *
      * @param temporary true if the focus change is temporary,
      *        such as when the window loses the focus; for
      *        more information on temporary focus changes see the
      *<a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
      * @return <code>false</code> if the focus change request is guaranteed to
      *         fail; <code>true</code> if it is likely to succeed
      * @see #requestFocus
      * @see java.awt.event.FocusEvent
      * @see #addFocusListener
      * @see #isFocusable
      * @see #isDisplayable
      * @see KeyboardFocusManager#clearGlobalFocusOwner
      * @since 1.4
      */
     protected boolean requestFocusInWindow(boolean temporary) {
         return requestFocusHelper(temporary, false);
     }

     boolean requestFocusInWindow(boolean temporary, CausedFocusEvent.Cause cause) {
         return requestFocusHelper(temporary, false, cause);
     }

     final boolean requestFocusHelper(boolean temporary,
                                      boolean focusedWindowChangeAllowed) {
         return requestFocusHelper(temporary, focusedWindowChangeAllowed, CausedFocusEvent.Cause.UNKNOWN);
     }

     final boolean requestFocusHelper(boolean temporary,
                                      boolean focusedWindowChangeAllowed,
                                      CausedFocusEvent.Cause cause)
     {
         if (!isRequestFocusAccepted(temporary, focusedWindowChangeAllowed, cause)) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("requestFocus is not accepted");
             }
             return false;
         }

         // Update most-recent map
         KeyboardFocusManager.setMostRecentFocusOwner(this);

         Component window = this;
         while ( (window != null) && !(window instanceof Window)) {
             if (!window.isVisible()) {
                 if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                     focusLog.finest("component is recurively invisible");
                 }
                 return false;
             }
             window = window.parent;
         }

         ComponentPeer peer = this.peer;
         Component heavyweight = (peer instanceof LightweightPeer)
             ? getNativeContainer() : this;
         if (heavyweight == null || !heavyweight.isVisible()) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Component is not a part of visible hierarchy");
             }
             return false;
         }
         peer = heavyweight.peer;
         if (peer == null) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Peer is null");
             }
             return false;
         }

         // Focus this Component
         long time = EventQueue.getMostRecentEventTime();
         boolean success = peer.requestFocus
             (this, temporary, focusedWindowChangeAllowed, time, cause);
         if (!success) {
             KeyboardFocusManager.getCurrentKeyboardFocusManager
                 (appContext).dequeueKeyEvents(time, this);
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Peer request failed");
             }
         } else {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Pass for " + this);
             }
         }
         return success;
     }

     private boolean isRequestFocusAccepted(boolean temporary,
                                            boolean focusedWindowChangeAllowed,
                                            CausedFocusEvent.Cause cause)
     {
         if (!isFocusable() || !isVisible()) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Not focusable or not visible");
             }
             return false;
         }

         ComponentPeer peer = this.peer;
         if (peer == null) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("peer is null");
             }
             return false;
         }

         Window window = getContainingWindow();
         if (window == null || !((Window)window).isFocusableWindow()) {
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("Component doesn't have toplevel");
             }
             return false;
         }

         // We have passed all regular checks for focus request,
         // now let's call RequestFocusController and see what it says.
         Component focusOwner = KeyboardFocusManager.getMostRecentFocusOwner(window);
         if (focusOwner == null) {
             // sometimes most recent focus owner may be null, but focus owner is not
             // e.g. we reset most recent focus owner if user removes focus owner
             focusOwner = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
             if (focusOwner != null && focusOwner.getContainingWindow() != window) {
                 focusOwner = null;
             }
         }

         if (focusOwner == this || focusOwner == null) {
             // Controller is supposed to verify focus transfers and for this it
             // should know both from and to components.  And it shouldn't verify
             // transfers from when these components are equal.
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("focus owner is null or this");
             }
             return true;
         }

         if (CausedFocusEvent.Cause.ACTIVATION == cause) {
             // we shouldn't call RequestFocusController in case we are
             // in activation.  We do request focus on component which
             // has got temporary focus lost and then on component which is
             // most recent focus owner.  But most recent focus owner can be
             // changed by requestFocsuXXX() call only, so this transfer has
             // been already approved.
             if (focusLog.isLoggable(PlatformLogger.FINEST)) {
                 focusLog.finest("cause is activation");
             }
             return true;
         }

         boolean ret = Component.requestFocusController.acceptRequestFocus(focusOwner,
                                                                           this,
                                                                           temporary,
                                                                           focusedWindowChangeAllowed,
                                                                           cause);
         if (focusLog.isLoggable(PlatformLogger.FINEST)) {
             focusLog.finest("RequestFocusController returns {0}", ret);
         }

         return ret;
     }

     private static RequestFocusController requestFocusController = new DummyRequestFocusController();

     // Swing access this method through reflection to implement InputVerifier's functionality.
     // Perhaps, we should make this method public (later ;)
     private static class DummyRequestFocusController implements RequestFocusController {
         public boolean acceptRequestFocus(Component from, Component to,
                                           boolean temporary, boolean focusedWindowChangeAllowed,
                                           CausedFocusEvent.Cause cause)
         {
             return true;
         }
     };

     synchronized static void setRequestFocusController(RequestFocusController requestController)
     {
         if (requestController == null) {
             requestFocusController = new DummyRequestFocusController();
         } else {
             requestFocusController = requestController;
         }
     }

     /**
      * Returns the Container which is the focus cycle root of this Component's
      * focus traversal cycle. Each focus traversal cycle has only a single
      * focus cycle root and each Component which is not a Container belongs to
      * only a single focus traversal cycle. Containers which are focus cycle
      * roots belong to two cycles: one rooted at the Container itself, and one
      * rooted at the Container's nearest focus-cycle-root ancestor. For such
      * Containers, this method will return the Container's nearest focus-cycle-
      * root ancestor.
      *
      * @return this Component's nearest focus-cycle-root ancestor
      * @see Container#isFocusCycleRoot()
      * @since 1.4
      */
     public Container getFocusCycleRootAncestor() {
         Container rootAncestor = this.parent;
         while (rootAncestor != null && !rootAncestor.isFocusCycleRoot()) {
             rootAncestor = rootAncestor.parent;
         }
         return rootAncestor;
     }

     /**
      * Returns whether the specified Container is the focus cycle root of this
      * Component's focus traversal cycle. Each focus traversal cycle has only
      * a single focus cycle root and each Component which is not a Container
      * belongs to only a single focus traversal cycle.
      *
      * @param container the Container to be tested
      * @return <code>true</code> if the specified Container is a focus-cycle-
      *         root of this Component; <code>false</code> otherwise
      * @see Container#isFocusCycleRoot()
      * @since 1.4
      */
     public boolean isFocusCycleRoot(Container container) {
         Container rootAncestor = getFocusCycleRootAncestor();
         return (rootAncestor == container);
     }

     Container getTraversalRoot() {
         return getFocusCycleRootAncestor();
     }

     /**
      * Transfers the focus to the next component, as though this Component were
      * the focus owner.
      * @see       #requestFocus()
      * @since     JDK1.1
      */
     public void transferFocus() {
         nextFocus();
     }

     /**
      * @deprecated As of JDK version 1.1,
      * replaced by transferFocus().
      */
     @Deprecated
     public void nextFocus() {
         transferFocus(false);
     }

     boolean transferFocus(boolean clearOnFailure) {
         if (focusLog.isLoggable(PlatformLogger.FINER)) {
             focusLog.finer("clearOnFailure = " + clearOnFailure);
         }
         Component toFocus = getNextFocusCandidate();
         boolean res = false;
         if (toFocus != null && !toFocus.isFocusOwner() && toFocus != this) {
             res = toFocus.requestFocusInWindow(CausedFocusEvent.Cause.TRAVERSAL_FORWARD);
         }
         if (clearOnFailure && !res) {
             if (focusLog.isLoggable(PlatformLogger.FINER)) {
                 focusLog.finer("clear global focus owner");
             }
             KeyboardFocusManager.getCurrentKeyboardFocusManager().clearGlobalFocusOwner();
         }
         if (focusLog.isLoggable(PlatformLogger.FINER)) {
             focusLog.finer("returning result: " + res);
         }
         return res;
     }

     final Component getNextFocusCandidate() {
         Container rootAncestor = getTraversalRoot();
         Component comp = this;
         while (rootAncestor != null &&
                !(rootAncestor.isShowing() && rootAncestor.canBeFocusOwner()))
         {
             comp = rootAncestor;
             rootAncestor = comp.getFocusCycleRootAncestor();
         }
         if (focusLog.isLoggable(PlatformLogger.FINER)) {
             focusLog.finer("comp = " + comp + ", root = " + rootAncestor);
         }
         Component candidate = null;
         if (rootAncestor != null) {
             FocusTraversalPolicy policy = rootAncestor.getFocusTraversalPolicy();
             Component toFocus = policy.getComponentAfter(rootAncestor, comp);
             if (focusLog.isLoggable(PlatformLogger.FINER)) {
                 focusLog.finer("component after is " + toFocus);
             }
             if (toFocus == null) {
                 toFocus = policy.getDefaultComponent(rootAncestor);
                 if (focusLog.isLoggable(PlatformLogger.FINER)) {
                     focusLog.finer("default component is " + toFocus);
                 }
             }
             if (toFocus == null) {
                 Applet applet = EmbeddedFrame.getAppletIfAncestorOf(this);
                 if (applet != null) {
                     toFocus = applet;
                 }
             }
             candidate = toFocus;
         }
         if (focusLog.isLoggable(PlatformLogger.FINER)) {
             focusLog.finer("Focus transfer candidate: " + candidate);
         }
         return candidate;
     }

     /**
      * Transfers the focus to the previous component, as though this Component
      * were the focus owner.
      * @see       #requestFocus()
      * @since     1.4
      */
     public void transferFocusBackward() {
         transferFocusBackward(false);
     }

     boolean transferFocusBackward(boolean clearOnFailure) {
         Container rootAncestor = getTraversalRoot();
         Component comp = this;
         while (rootAncestor != null &&
                !(rootAncestor.isShowing() && rootAncestor.canBeFocusOwner()))
         {
             comp = rootAncestor;
             rootAncestor = comp.getFocusCycleRootAncestor();
         }
         boolean res = false;
         if (rootAncestor != null) {
             FocusTraversalPolicy policy = rootAncestor.getFocusTraversalPolicy();
             Component toFocus = policy.getComponentBefore(rootAncestor, comp);
             if (toFocus == null) {
                 toFocus = policy.getDefaultComponent(rootAncestor);
             }
             if (toFocus != null) {
                 res = toFocus.requestFocusInWindow(CausedFocusEvent.Cause.TRAVERSAL_BACKWARD);
             }
         }
         if (!res) {
             if (focusLog.isLoggable(PlatformLogger.FINER)) {
                 focusLog.finer("clear global focus owner");
             }
             KeyboardFocusManager.getCurrentKeyboardFocusManager().clearGlobalFocusOwner();
         }
         if (focusLog.isLoggable(PlatformLogger.FINER)) {
             focusLog.finer("returning result: " + res);
         }
         return res;
     }

     /**
      * Transfers the focus up one focus traversal cycle. Typically, the focus
      * owner is set to this Component's focus cycle root, and the current focus
      * cycle root is set to the new focus owner's focus cycle root. If,
      * however, this Component's focus cycle root is a Window, then the focus
      * owner is set to the focus cycle root's default Component to focus, and
      * the current focus cycle root is unchanged.
      *
      * @see       #requestFocus()
      * @see       Container#isFocusCycleRoot()
      * @see       Container#setFocusCycleRoot(boolean)
      * @since     1.4
      */
     public void transferFocusUpCycle() {
         Container rootAncestor;
         for (rootAncestor = getFocusCycleRootAncestor();
              rootAncestor != null && !(rootAncestor.isShowing() &&
                                        rootAncestor.isFocusable() &&
                                        rootAncestor.isEnabled());
              rootAncestor = rootAncestor.getFocusCycleRootAncestor()) {
         }

         if (rootAncestor != null) {
             Container rootAncestorRootAncestor =
                 rootAncestor.getFocusCycleRootAncestor();
             KeyboardFocusManager.getCurrentKeyboardFocusManager().
                 setGlobalCurrentFocusCycleRoot(
                                                (rootAncestorRootAncestor != null)
                                                ? rootAncestorRootAncestor
                                                : rootAncestor);
             rootAncestor.requestFocus(CausedFocusEvent.Cause.TRAVERSAL_UP);
         } else {
             Window window = getContainingWindow();

             if (window != null) {
                 Component toFocus = window.getFocusTraversalPolicy().
                     getDefaultComponent(window);
                 if (toFocus != null) {
                     KeyboardFocusManager.getCurrentKeyboardFocusManager().
                         setGlobalCurrentFocusCycleRoot(window);
                     toFocus.requestFocus(CausedFocusEvent.Cause.TRAVERSAL_UP);
                 }
             }
         }
     }

     /**
      * Returns <code>true</code> if this <code>Component</code> is the
      * focus owner.  This method is obsolete, and has been replaced by
      * <code>isFocusOwner()</code>.
      *
      * @return <code>true</code> if this <code>Component</code> is the
      *         focus owner; <code>false</code> otherwise
      * @since 1.2
      */
     public boolean hasFocus() {
         return (KeyboardFocusManager.getCurrentKeyboardFocusManager().
                 getFocusOwner() == this);
     }

     /**
      * Returns <code>true</code> if this <code>Component</code> is the
      *    focus owner.
      *
      * @return <code>true</code> if this <code>Component</code> is the
      *     focus owner; <code>false</code> otherwise
      * @since 1.4
      */
     public boolean isFocusOwner() {
         return hasFocus();
     }

     /*
      * Used to disallow auto-focus-transfer on disposal of the focus owner
      * in the process of disposing its parent container.
      */
     private boolean autoFocusTransferOnDisposal = true;

     void setAutoFocusTransferOnDisposal(boolean value) {
         autoFocusTransferOnDisposal = value;
     }

     boolean isAutoFocusTransferOnDisposal() {
         return autoFocusTransferOnDisposal;
     }

     /**
      * Adds the specified popup menu to the component.
      * @param     popup the popup menu to be added to the component.
      * @see       #remove(MenuComponent)
      * @exception NullPointerException if {@code popup} is {@code null}
      * @since     JDK1.1
      */
     public void add(PopupMenu popup) {
         synchronized (getTreeLock()) {
             if (popup.parent != null) {
                 popup.parent.remove(popup);
             }
             if (popups == null) {
                 popups = new Vector();
             }
             popups.addElement(popup);
             popup.parent = this;

             if (peer != null) {
                 if (popup.peer == null) {
                     popup.addNotify();
                 }
             }
         }
     }

     /**
      * Removes the specified popup menu from the component.
      * @param     popup the popup menu to be removed
      * @see       #add(PopupMenu)
      * @since     JDK1.1
      */
     public void remove(MenuComponent popup) {
         synchronized (getTreeLock()) {
             if (popups == null) {
                 return;
             }
             int index = popups.indexOf(popup);
             if (index >= 0) {
                 PopupMenu pmenu = (PopupMenu)popup;
                 if (pmenu.peer != null) {
                     pmenu.removeNotify();
                 }
                 pmenu.parent = null;
                 popups.removeElementAt(index);
                 if (popups.size() == 0) {
                     popups = null;
                 }
             }
         }
     }

     /**
      * Returns a string representing the state of this component. This
      * method is intended to be used only for debugging purposes, and the
      * content and format of the returned string may vary between
      * implementations. The returned string may be empty but may not be
      * <code>null</code>.
      *
      * @return  a string representation of this component's state
      * @since     JDK1.0
      */
     protected String paramString() {
         String thisName = getName();
         String str = (thisName != null? thisName : "") + "," + x + "," + y + "," + width + "x" + height;
         if (!isValid()) {
             str += ",invalid";
         }
         if (!visible) {
             str += ",hidden";
         }
         if (!enabled) {
             str += ",disabled";
         }
         return str;
     }

     /**
      * Returns a string representation of this component and its values.
      * @return    a string representation of this component
      * @since     JDK1.0
      */
     public String toString() {
         return getClass().getName() + "[" + paramString() + "]";
     }

     /**
      * Prints a listing of this component to the standard system output
      * stream <code>System.out</code>.
      * @see       java.lang.System#out
      * @since     JDK1.0
      */
     public void list() {
         list(System.out, 0);
     }

     /**
      * Prints a listing of this component to the specified output
      * stream.
      * @param    out   a print stream
      * @throws   NullPointerException if {@code out} is {@code null}
      * @since    JDK1.0
      */
     public void list(PrintStream out) {
         list(out, 0);
     }

     /**
      * Prints out a list, starting at the specified indentation, to the
      * specified print stream.
      * @param     out      a print stream
      * @param     indent   number of spaces to indent
      * @see       java.io.PrintStream#println(java.lang.Object)
      * @throws    NullPointerException if {@code out} is {@code null}
      * @since     JDK1.0
      */
     public void list(PrintStream out, int indent) {
         for (int i = 0 ; i < indent ; i++) {
             out.print(" ");
         }
         out.println(this);
     }

     /**
      * Prints a listing to the specified print writer.
      * @param  out  the print writer to print to
      * @throws NullPointerException if {@code out} is {@code null}
      * @since JDK1.1
      */
     public void list(PrintWriter out) {
         list(out, 0);
     }

     /**
      * Prints out a list, starting at the specified indentation, to
      * the specified print writer.
      * @param out the print writer to print to
      * @param indent the number of spaces to indent
      * @throws NullPointerException if {@code out} is {@code null}
      * @see       java.io.PrintStream#println(java.lang.Object)
      * @since JDK1.1
      */
     public void list(PrintWriter out, int indent) {
         for (int i = 0 ; i < indent ; i++) {
             out.print(" ");
         }
         out.println(this);
     }

     /*
      * Fetches the native container somewhere higher up in the component
      * tree that contains this component.
      */
     Container getNativeContainer() {
         Container p = parent;
         while (p != null && p.peer instanceof LightweightPeer) {
             p = p.getParent_NoClientCode();
         }
         return p;
     }

     /**
      * Adds a PropertyChangeListener to the listener list. The listener is
      * registered for all bound properties of this class, including the
      * following:
      * <ul>
      *    <li>this Component's font ("font")</li>
      *    <li>this Component's background color ("background")</li>
      *    <li>this Component's foreground color ("foreground")</li>
      *    <li>this Component's focusability ("focusable")</li>
      *    <li>this Component's focus traversal keys enabled state
      *        ("focusTraversalKeysEnabled")</li>
      *    <li>this Component's Set of FORWARD_TRAVERSAL_KEYS
      *        ("forwardFocusTraversalKeys")</li>
      *    <li>this Component's Set of BACKWARD_TRAVERSAL_KEYS
      *        ("backwardFocusTraversalKeys")</li>
      *    <li>this Component's Set of UP_CYCLE_TRAVERSAL_KEYS
      *        ("upCycleFocusTraversalKeys")</li>
      *    <li>this Component's preferred size ("preferredSize")</li>
      *    <li>this Component's minimum size ("minimumSize")</li>
      *    <li>this Component's maximum size ("maximumSize")</li>
      *    <li>this Component's name ("name")</li>
      * </ul>
      * Note that if this <code>Component</code> is inheriting a bound property, then no
      * event will be fired in response to a change in the inherited property.
      * <p>
      * If <code>listener</code> is <code>null</code>,
      * no exception is thrown and no action is performed.
      *
      * @param    listener  the property change listener to be added
      *
      * @see #removePropertyChangeListener
      * @see #getPropertyChangeListeners
      * @see #addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      */
     public void addPropertyChangeListener(
                                                        PropertyChangeListener listener) {
         synchronized (getObjectLock()) {
             if (listener == null) {
                 return;
             }
             if (changeSupport == null) {
                 changeSupport = new PropertyChangeSupport(this);
             }
             changeSupport.addPropertyChangeListener(listener);
         }
     }

     /**
      * Removes a PropertyChangeListener from the listener list. This method
      * should be used to remove PropertyChangeListeners that were registered
      * for all bound properties of this class.
      * <p>
      * If listener is null, no exception is thrown and no action is performed.
      *
      * @param listener the PropertyChangeListener to be removed
      *
      * @see #addPropertyChangeListener
      * @see #getPropertyChangeListeners
      * @see #removePropertyChangeListener(java.lang.String,java.beans.PropertyChangeListener)
      */
     public void removePropertyChangeListener(
                                                           PropertyChangeListener listener) {
         synchronized (getObjectLock()) {
             if (listener == null || changeSupport == null) {
                 return;
             }
             changeSupport.removePropertyChangeListener(listener);
         }
     }

     /**
      * Returns an array of all the property change listeners
      * registered on this component.
      *
      * @return all of this component's <code>PropertyChangeListener</code>s
      *         or an empty array if no property change
      *         listeners are currently registered
      *
      * @see      #addPropertyChangeListener
      * @see      #removePropertyChangeListener
      * @see      #getPropertyChangeListeners(java.lang.String)
      * @see      java.beans.PropertyChangeSupport#getPropertyChangeListeners
      * @since    1.4
      */
     public PropertyChangeListener[] getPropertyChangeListeners() {
         synchronized (getObjectLock()) {
             if (changeSupport == null) {
                 return new PropertyChangeListener[0];
             }
             return changeSupport.getPropertyChangeListeners();
         }
     }

     /**
      * Adds a PropertyChangeListener to the listener list for a specific
      * property. The specified property may be user-defined, or one of the
      * following:
      * <ul>
      *    <li>this Component's font ("font")</li>
      *    <li>this Component's background color ("background")</li>
      *    <li>this Component's foreground color ("foreground")</li>
      *    <li>this Component's focusability ("focusable")</li>
      *    <li>this Component's focus traversal keys enabled state
      *        ("focusTraversalKeysEnabled")</li>
      *    <li>this Component's Set of FORWARD_TRAVERSAL_KEYS
      *        ("forwardFocusTraversalKeys")</li>
      *    <li>this Component's Set of BACKWARD_TRAVERSAL_KEYS
      *        ("backwardFocusTraversalKeys")</li>
      *    <li>this Component's Set of UP_CYCLE_TRAVERSAL_KEYS
      *        ("upCycleFocusTraversalKeys")</li>
      * </ul>
      * Note that if this <code>Component</code> is inheriting a bound property, then no
      * event will be fired in response to a change in the inherited property.
      * <p>
      * If <code>propertyName</code> or <code>listener</code> is <code>null</code>,
      * no exception is thrown and no action is taken.
      *
      * @param propertyName one of the property names listed above
      * @param listener the property change listener to be added
      *
      * @see #removePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      * @see #getPropertyChangeListeners(java.lang.String)
      * @see #addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      */
     public void addPropertyChangeListener(
                                                        String propertyName,
                                                        PropertyChangeListener listener) {
         synchronized (getObjectLock()) {
             if (listener == null) {
                 return;
             }
             if (changeSupport == null) {
                 changeSupport = new PropertyChangeSupport(this);
             }
             changeSupport.addPropertyChangeListener(propertyName, listener);
         }
     }

     /**
      * Removes a <code>PropertyChangeListener</code> from the listener
      * list for a specific property. This method should be used to remove
      * <code>PropertyChangeListener</code>s
      * that were registered for a specific bound property.
      * <p>
      * If <code>propertyName</code> or <code>listener</code> is <code>null</code>,
      * no exception is thrown and no action is taken.
      *
      * @param propertyName a valid property name
      * @param listener the PropertyChangeListener to be removed
      *
      * @see #addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      * @see #getPropertyChangeListeners(java.lang.String)
      * @see #removePropertyChangeListener(java.beans.PropertyChangeListener)
      */
     public void removePropertyChangeListener(
                                                           String propertyName,
                                                           PropertyChangeListener listener) {
         synchronized (getObjectLock()) {
             if (listener == null || changeSupport == null) {
                 return;
             }
             changeSupport.removePropertyChangeListener(propertyName, listener);
         }
     }

     /**
      * Returns an array of all the listeners which have been associated
      * with the named property.
      *
      * @return all of the <code>PropertyChangeListener</code>s associated with
      *         the named property; if no such listeners have been added or
      *         if <code>propertyName</code> is <code>null</code>, an empty
      *         array is returned
      *
      * @see #addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      * @see #removePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)
      * @see #getPropertyChangeListeners
      * @since 1.4
      */
     public PropertyChangeListener[] getPropertyChangeListeners(
                                                                             String propertyName) {
         synchronized (getObjectLock()) {
             if (changeSupport == null) {
                 return new PropertyChangeListener[0];
             }
             return changeSupport.getPropertyChangeListeners(propertyName);
         }
     }

     /**
      * Support for reporting bound property changes for Object properties.
      * This method can be called when a bound property has changed and it will
      * send the appropriate PropertyChangeEvent to any registered
      * PropertyChangeListeners.
      *
      * @param propertyName the property whose value has changed
      * @param oldValue the property's previous value
      * @param newValue the property's new value
      */
     protected void firePropertyChange(String propertyName,
                                       Object oldValue, Object newValue) {
         PropertyChangeSupport changeSupport;
         synchronized (getObjectLock()) {
             changeSupport = this.changeSupport;
         }
         if (changeSupport == null ||
             (oldValue != null && newValue != null && oldValue.equals(newValue))) {
             return;
         }
         changeSupport.firePropertyChange(propertyName, oldValue, newValue);
     }

     /**
      * Support for reporting bound property changes for boolean properties.
      * This method can be called when a bound property has changed and it will
      * send the appropriate PropertyChangeEvent to any registered
      * PropertyChangeListeners.
      *
      * @param propertyName the property whose value has changed
      * @param oldValue the property's previous value
      * @param newValue the property's new value
      * @since 1.4
      */
     protected void firePropertyChange(String propertyName,
                                       boolean oldValue, boolean newValue) {
         PropertyChangeSupport changeSupport = this.changeSupport;
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         changeSupport.firePropertyChange(propertyName, oldValue, newValue);
     }

     /**
      * Support for reporting bound property changes for integer properties.
      * This method can be called when a bound property has changed and it will
      * send the appropriate PropertyChangeEvent to any registered
      * PropertyChangeListeners.
      *
      * @param propertyName the property whose value has changed
      * @param oldValue the property's previous value
      * @param newValue the property's new value
      * @since 1.4
      */
     protected void firePropertyChange(String propertyName,
                                       int oldValue, int newValue) {
         PropertyChangeSupport changeSupport = this.changeSupport;
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         changeSupport.firePropertyChange(propertyName, oldValue, newValue);
     }

     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a byte)
      * @param newValue the new value of the property (as a byte)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, byte oldValue, byte newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, Byte.valueOf(oldValue), Byte.valueOf(newValue));
     }

     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a char)
      * @param newValue the new value of the property (as a char)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, char oldValue, char newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, new Character(oldValue), new Character(newValue));
     }

     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a short)
      * @param newValue the old value of the property (as a short)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, short oldValue, short newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, Short.valueOf(oldValue), Short.valueOf(newValue));
     }


     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a long)
      * @param newValue the new value of the property (as a long)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, long oldValue, long newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, Long.valueOf(oldValue), Long.valueOf(newValue));
     }

     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a float)
      * @param newValue the new value of the property (as a float)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, float oldValue, float newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, Float.valueOf(oldValue), Float.valueOf(newValue));
     }

     /**
      * Reports a bound property change.
      *
      * @param propertyName the programmatic name of the property
      *          that was changed
      * @param oldValue the old value of the property (as a double)
      * @param newValue the new value of the property (as a double)
      * @see #firePropertyChange(java.lang.String, java.lang.Object,
      *          java.lang.Object)
      * @since 1.5
      */
     public void firePropertyChange(String propertyName, double oldValue, double newValue) {
         if (changeSupport == null || oldValue == newValue) {
             return;
         }
         firePropertyChange(propertyName, Double.valueOf(oldValue), Double.valueOf(newValue));
     }


     // Serialization support.

     /**
      * Component Serialized Data Version.
      *
      * @serial
      */
     private int componentSerializedDataVersion = 4;

     /**
      * This hack is for Swing serialization. It will invoke
      * the Swing package private method <code>compWriteObjectNotify</code>.
      */
     private void doSwingSerialization() {
         Package swingPackage = Package.getPackage("javax.swing");
         // For Swing serialization to correctly work Swing needs to
         // be notified before Component does it's serialization.  This
         // hack accomodates this.
         //
         // Swing classes MUST be loaded by the bootstrap class loader,
         // otherwise we don't consider them.
         for (Class klass = Component.this.getClass(); klass != null;
                    klass = klass.getSuperclass()) {
             if (klass.getPackage() == swingPackage &&
                       klass.getClassLoader() == null) {
                 final Class swingClass = klass;
                 // Find the first override of the compWriteObjectNotify method
                 Method[] methods = (Method[])AccessController.doPrivileged(
                                                                            new PrivilegedAction() {
                                                                                public Object run() {
                                                                                    return swingClass.getDeclaredMethods();
                                                                                }
                                                                            });
                 for (int counter = methods.length - 1; counter >= 0;
                      counter--) {
                     final Method method = methods[counter];
                     if (method.getName().equals("compWriteObjectNotify")){
                         // We found it, use doPrivileged to make it accessible
                         // to use.
                         AccessController.doPrivileged(new PrivilegedAction() {
                                 public Object run() {
                                     method.setAccessible(true);
                                     return null;
                                 }
                             });
                         // Invoke the method
                         try {
                             method.invoke(this, (Object[]) null);
                         } catch (IllegalAccessException iae) {
                         } catch (InvocationTargetException ite) {
                         }
                         // We're done, bail.
                         return;
                     }
                 }
             }
         }
     }

     /**
      * Writes default serializable fields to stream.  Writes
      * a variety of serializable listeners as optional data.
      * The non-serializable listeners are detected and
      * no attempt is made to serialize them.
      *
      * @param s the <code>ObjectOutputStream</code> to write
      * @serialData <code>null</code> terminated sequence of
      *   0 or more pairs; the pair consists of a <code>String</code>
      *   and an <code>Object</code>; the <code>String</code> indicates
      *   the type of object and is one of the following (as of 1.4):
      *   <code>componentListenerK</code> indicating an
      *     <code>ComponentListener</code> object;
      *   <code>focusListenerK</code> indicating an
      *     <code>FocusListener</code> object;
      *   <code>keyListenerK</code> indicating an
      *     <code>KeyListener</code> object;
      *   <code>mouseListenerK</code> indicating an
      *     <code>MouseListener</code> object;
      *   <code>mouseMotionListenerK</code> indicating an
      *     <code>MouseMotionListener</code> object;
      *   <code>inputMethodListenerK</code> indicating an
      *     <code>InputMethodListener</code> object;
      *   <code>hierarchyListenerK</code> indicating an
      *     <code>HierarchyListener</code> object;
      *   <code>hierarchyBoundsListenerK</code> indicating an
      *     <code>HierarchyBoundsListener</code> object;
      *   <code>mouseWheelListenerK</code> indicating an
      *     <code>MouseWheelListener</code> object
      * @serialData an optional <code>ComponentOrientation</code>
      *    (after <code>inputMethodListener</code>, as of 1.2)
      *
      * @see AWTEventMulticaster#save(java.io.ObjectOutputStream, java.lang.String, java.util.EventListener)
      * @see #componentListenerK
      * @see #focusListenerK
      * @see #keyListenerK
      * @see #mouseListenerK
      * @see #mouseMotionListenerK
      * @see #inputMethodListenerK
      * @see #hierarchyListenerK
      * @see #hierarchyBoundsListenerK
      * @see #mouseWheelListenerK
      * @see #readObject(ObjectInputStream)
      */
     private void writeObject(ObjectOutputStream s)
       throws IOException
     {
         doSwingSerialization();

         s.defaultWriteObject();

         AWTEventMulticaster.save(s, componentListenerK, componentListener);
         AWTEventMulticaster.save(s, focusListenerK, focusListener);
         AWTEventMulticaster.save(s, keyListenerK, keyListener);
         AWTEventMulticaster.save(s, mouseListenerK, mouseListener);
         AWTEventMulticaster.save(s, mouseMotionListenerK, mouseMotionListener);
         AWTEventMulticaster.save(s, inputMethodListenerK, inputMethodListener);

         s.writeObject(null);
         s.writeObject(componentOrientation);

         AWTEventMulticaster.save(s, hierarchyListenerK, hierarchyListener);
         AWTEventMulticaster.save(s, hierarchyBoundsListenerK,
                                  hierarchyBoundsListener);
         s.writeObject(null);

         AWTEventMulticaster.save(s, mouseWheelListenerK, mouseWheelListener);
         s.writeObject(null);

     }

     /**
      * Reads the <code>ObjectInputStream</code> and if it isn't
      * <code>null</code> adds a listener to receive a variety
      * of events fired by the component.
      * Unrecognized keys or values will be ignored.
      *
      * @param s the <code>ObjectInputStream</code> to read
      * @see #writeObject(ObjectOutputStream)
      */
     private void readObject(ObjectInputStream s)
       throws ClassNotFoundException, IOException
     {
         objectLock = new Object();

         acc = AccessController.getContext();

         s.defaultReadObject();

         appContext = AppContext.getAppContext();
         coalescingEnabled = checkCoalescing();
         if (componentSerializedDataVersion < 4) {
             // These fields are non-transient and rely on default
             // serialization. However, the default values are insufficient,
             // so we need to set them explicitly for object data streams prior
             // to 1.4.
             focusable = true;
             isFocusTraversableOverridden = FOCUS_TRAVERSABLE_UNKNOWN;
             initializeFocusTraversalKeys();
             focusTraversalKeysEnabled = true;
         }

         Object keyOrNull;
         while(null != (keyOrNull = s.readObject())) {
             String key = ((String)keyOrNull).intern();

             if (componentListenerK == key)
                 addComponentListener((ComponentListener)(s.readObject()));

             else if (focusListenerK == key)
                 addFocusListener((FocusListener)(s.readObject()));

             else if (keyListenerK == key)
                 addKeyListener((KeyListener)(s.readObject()));

             else if (mouseListenerK == key)
                 addMouseListener((MouseListener)(s.readObject()));

             else if (mouseMotionListenerK == key)
                 addMouseMotionListener((MouseMotionListener)(s.readObject()));

             else if (inputMethodListenerK == key)
                 addInputMethodListener((InputMethodListener)(s.readObject()));

             else // skip value for unrecognized key
                 s.readObject();

         }

         // Read the component's orientation if it's present
         Object orient = null;

         try {
             orient = s.readObject();
         } catch (java.io.OptionalDataException e) {
             // JDK 1.1 instances will not have this optional data.
             // e.eof will be true to indicate that there is no more
             // data available for this object.
             // If e.eof is not true, throw the exception as it
             // might have been caused by reasons unrelated to
             // componentOrientation.

             if (!e.eof)  {
                 throw (e);
             }
         }

         if (orient != null) {
             componentOrientation = (ComponentOrientation)orient;
         } else {
             componentOrientation = ComponentOrientation.UNKNOWN;
         }

         try {
             while(null != (keyOrNull = s.readObject())) {
                 String key = ((String)keyOrNull).intern();

                 if (hierarchyListenerK == key) {
                     addHierarchyListener((HierarchyListener)(s.readObject()));
                 }
                 else if (hierarchyBoundsListenerK == key) {
                     addHierarchyBoundsListener((HierarchyBoundsListener)
                                                (s.readObject()));
                 }
                 else {
                     // skip value for unrecognized key
                     s.readObject();
                 }
             }
         } catch (java.io.OptionalDataException e) {
             // JDK 1.1/1.2 instances will not have this optional data.
             // e.eof will be true to indicate that there is no more
             // data available for this object.
             // If e.eof is not true, throw the exception as it
             // might have been caused by reasons unrelated to
             // hierarchy and hierarchyBounds listeners.

             if (!e.eof)  {
                 throw (e);
             }
         }

         try {
             while (null != (keyOrNull = s.readObject())) {
                 String key = ((String)keyOrNull).intern();

                 if (mouseWheelListenerK == key) {
                     addMouseWheelListener((MouseWheelListener)(s.readObject()));
                 }
                 else {
                     // skip value for unrecognized key
                     s.readObject();
                 }
             }
         } catch (java.io.OptionalDataException e) {
             // pre-1.3 instances will not have this optional data.
             // e.eof will be true to indicate that there is no more
             // data available for this object.
             // If e.eof is not true, throw the exception as it
             // might have been caused by reasons unrelated to
             // mouse wheel listeners

             if (!e.eof)  {
                 throw (e);
             }
         }

         if (popups != null) {
             int npopups = popups.size();
             for (int i = 0 ; i < npopups ; i++) {
                 PopupMenu popup = (PopupMenu)popups.elementAt(i);
                 popup.parent = this;
             }
         }
     }

     /**
      * Sets the language-sensitive orientation that is to be used to order
      * the elements or text within this component.  Language-sensitive
      * <code>LayoutManager</code> and <code>Component</code>
      * subclasses will use this property to
      * determine how to lay out and draw components.
      * <p>
      * At construction time, a component's orientation is set to
      * <code>ComponentOrientation.UNKNOWN</code>,
      * indicating that it has not been specified
      * explicitly.  The UNKNOWN orientation behaves the same as
      * <code>ComponentOrientation.LEFT_TO_RIGHT</code>.
      * <p>
      * To set the orientation of a single component, use this method.
      * To set the orientation of an entire component
      * hierarchy, use
      * {@link #applyComponentOrientation applyComponentOrientation}.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      *
      * @see ComponentOrientation
      * @see #invalidate
      *
      * @author Laura Werner, IBM
      * @beaninfo
      *       bound: true
      */
     public void setComponentOrientation(ComponentOrientation o) {
         ComponentOrientation oldValue = componentOrientation;
         componentOrientation = o;

         // This is a bound property, so report the change to
         // any registered listeners.  (Cheap if there are none.)
         firePropertyChange("componentOrientation", oldValue, o);

         // This could change the preferred size of the Component.
         invalidateIfValid();
     }

     /**
      * Retrieves the language-sensitive orientation that is to be used to order
      * the elements or text within this component.  <code>LayoutManager</code>
      * and <code>Component</code>
      * subclasses that wish to respect orientation should call this method to
      * get the component's orientation before performing layout or drawing.
      *
      * @see ComponentOrientation
      *
      * @author Laura Werner, IBM
      */
     public ComponentOrientation getComponentOrientation() {
         return componentOrientation;
     }

     /**
      * Sets the <code>ComponentOrientation</code> property of this component
      * and all components contained within it.
      * <p>
      * This method changes layout-related information, and therefore,
      * invalidates the component hierarchy.
      *
      *
      * @param orientation the new component orientation of this component and
      *        the components contained within it.
      * @exception NullPointerException if <code>orientation</code> is null.
      * @see #setComponentOrientation
      * @see #getComponentOrientation
      * @see #invalidate
      * @since 1.4
      */
     public void applyComponentOrientation(ComponentOrientation orientation) {
         if (orientation == null) {
             throw new NullPointerException();
         }
         setComponentOrientation(orientation);
     }

     final boolean canBeFocusOwner() {
         // It is enabled, visible, focusable.
         if (isEnabled() && isDisplayable() && isVisible() && isFocusable()) {
             return true;
         }
         return false;
     }

     /**
      * Checks that this component meets the prerequesites to be focus owner:
      * - it is enabled, visible, focusable
      * - it's parents are all enabled and showing
      * - top-level window is focusable
      * - if focus cycle root has DefaultFocusTraversalPolicy then it also checks that this policy accepts
      * this component as focus owner
      * @since 1.5
      */
     final boolean canBeFocusOwnerRecursively() {
         // - it is enabled, visible, focusable
         if (!canBeFocusOwner()) {
             return false;
         }

         // - it's parents are all enabled and showing
         synchronized(getTreeLock()) {
             if (parent != null) {
                 return parent.canContainFocusOwner(this);
             }
         }
         return true;
     }

     /**
      * Fix the location of the HW component in a LW container hierarchy.
      */
     final void relocateComponent() {
         synchronized (getTreeLock()) {
             if (peer == null) {
                 return;
             }
             int nativeX = x;
             int nativeY = y;
             for (Component cont = getContainer();
                     cont != null && cont.isLightweight();
                     cont = cont.getContainer())
             {
                 nativeX += cont.x;
                 nativeY += cont.y;
             }
             peer.setBounds(nativeX, nativeY, width, height,
                     ComponentPeer.SET_LOCATION);
         }
     }

     /**
      * Returns the <code>Window</code> ancestor of the component.
      * @return Window ancestor of the component or component by itself if it is Window;
      *         null, if component is not a part of window hierarchy
      */
     Window getContainingWindow() {
         return SunToolkit.getContainingWindow(this);
     }

     /**
      * Initialize JNI field and method IDs
      */
     private static native void initIDs();

     /*
      * --- Accessibility Support ---
      *
      *  Component will contain all of the methods in interface Accessible,
      *  though it won't actually implement the interface - that will be up
      *  to the individual objects which extend Component.
      */

     AccessibleContext accessibleContext = null;

     /**
      * Gets the <code>AccessibleContext</code> associated
      * with this <code>Component</code>.
      * The method implemented by this base
      * class returns null.  Classes that extend <code>Component</code>
      * should implement this method to return the
      * <code>AccessibleContext</code> associated with the subclass.
      *
      *
      * @return the <code>AccessibleContext</code> of this
      *    <code>Component</code>
      * @since 1.3
      */
     public AccessibleContext getAccessibleContext() {
         return accessibleContext;
     }

     /**
      * Inner class of Component used to provide default support for
      * accessibility.  This class is not meant to be used directly by
      * application developers, but is instead meant only to be
      * subclassed by component developers.
      * <p>
      * The class used to obtain the accessible role for this object.
      * @since 1.3
      */
     protected abstract class AccessibleAWTComponent extends AccessibleContext
         implements Serializable, AccessibleComponent {

         private static final long serialVersionUID = 642321655757800191L;

         /**
          * Though the class is abstract, this should be called by
          * all sub-classes.
          */
         protected AccessibleAWTComponent() {
         }

         protected ComponentListener accessibleAWTComponentHandler = null;
         protected FocusListener accessibleAWTFocusHandler = null;

         /**
          * Fire PropertyChange listener, if one is registered,
          * when shown/hidden..
          * @since 1.3
          */
         protected class AccessibleAWTComponentHandler implements ComponentListener {
             public void componentHidden(ComponentEvent e)  {
                 if (accessibleContext != null) {
                     accessibleContext.firePropertyChange(
                                                          AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                          AccessibleState.VISIBLE, null);
                 }
             }

             public void componentShown(ComponentEvent e)  {
                 if (accessibleContext != null) {
                     accessibleContext.firePropertyChange(
                                                          AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                          null, AccessibleState.VISIBLE);
                 }
             }

             public void componentMoved(ComponentEvent e)  {
             }

             public void componentResized(ComponentEvent e)  {
             }
         } // inner class AccessibleAWTComponentHandler


         /**
          * Fire PropertyChange listener, if one is registered,
          * when focus events happen
          * @since 1.3
          */
         protected class AccessibleAWTFocusHandler implements FocusListener {
             public void focusGained(FocusEvent event) {
                 if (accessibleContext != null) {
                     accessibleContext.firePropertyChange(
                                                          AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                          null, AccessibleState.FOCUSED);
                 }
             }
             public void focusLost(FocusEvent event) {
                 if (accessibleContext != null) {
                     accessibleContext.firePropertyChange(
                                                          AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                          AccessibleState.FOCUSED, null);
                 }
             }
         }  // inner class AccessibleAWTFocusHandler


         /**
          * Adds a <code>PropertyChangeListener</code> to the listener list.
          *
          * @param listener  the property change listener to be added
          */
         public void addPropertyChangeListener(PropertyChangeListener listener) {
             if (accessibleAWTComponentHandler == null) {
                 accessibleAWTComponentHandler = new AccessibleAWTComponentHandler();
                 Component.this.addComponentListener(accessibleAWTComponentHandler);
             }
             if (accessibleAWTFocusHandler == null) {
                 accessibleAWTFocusHandler = new AccessibleAWTFocusHandler();
                 Component.this.addFocusListener(accessibleAWTFocusHandler);
             }
             super.addPropertyChangeListener(listener);
         }

         /**
          * Remove a PropertyChangeListener from the listener list.
          * This removes a PropertyChangeListener that was registered
          * for all properties.
          *
          * @param listener  The PropertyChangeListener to be removed
          */
         public void removePropertyChangeListener(PropertyChangeListener listener) {
             if (accessibleAWTComponentHandler != null) {
                 Component.this.removeComponentListener(accessibleAWTComponentHandler);
                 accessibleAWTComponentHandler = null;
             }
             if (accessibleAWTFocusHandler != null) {
                 Component.this.removeFocusListener(accessibleAWTFocusHandler);
                 accessibleAWTFocusHandler = null;
             }
             super.removePropertyChangeListener(listener);
         }

         // AccessibleContext methods
         //
         /**
          * Gets the accessible name of this object.  This should almost never
          * return <code>java.awt.Component.getName()</code>,
          * as that generally isn't a localized name,
          * and doesn't have meaning for the user.  If the
          * object is fundamentally a text object (e.g. a menu item), the
          * accessible name should be the text of the object (e.g. "save").
          * If the object has a tooltip, the tooltip text may also be an
          * appropriate String to return.
          *
          * @return the localized name of the object -- can be
          *         <code>null</code> if this
          *         object does not have a name
          * @see javax.accessibility.AccessibleContext#setAccessibleName
          */
         public String getAccessibleName() {
             return accessibleName;
         }

         /**
          * Gets the accessible description of this object.  This should be
          * a concise, localized description of what this object is - what
          * is its meaning to the user.  If the object has a tooltip, the
          * tooltip text may be an appropriate string to return, assuming
          * it contains a concise description of the object (instead of just
          * the name of the object - e.g. a "Save" icon on a toolbar that
          * had "save" as the tooltip text shouldn't return the tooltip
          * text as the description, but something like "Saves the current
          * text document" instead).
          *
          * @return the localized description of the object -- can be
          *        <code>null</code> if this object does not have a description
          * @see javax.accessibility.AccessibleContext#setAccessibleDescription
          */
         public String getAccessibleDescription() {
             return accessibleDescription;
         }

         /**
          * Gets the role of this object.
          *
          * @return an instance of <code>AccessibleRole</code>
          *      describing the role of the object
          * @see javax.accessibility.AccessibleRole
          */
         public AccessibleRole getAccessibleRole() {
             return AccessibleRole.AWT_COMPONENT;
         }

         /**
          * Gets the state of this object.
          *
          * @return an instance of <code>AccessibleStateSet</code>
          *       containing the current state set of the object
          * @see javax.accessibility.AccessibleState
          */
         public AccessibleStateSet getAccessibleStateSet() {
             return Component.this.getAccessibleStateSet();
         }

         /**
          * Gets the <code>Accessible</code> parent of this object.
          * If the parent of this object implements <code>Accessible</code>,
          * this method should simply return <code>getParent</code>.
          *
          * @return the <code>Accessible</code> parent of this
          *      object -- can be <code>null</code> if this
          *      object does not have an <code>Accessible</code> parent
          */
         public Accessible getAccessibleParent() {
             if (accessibleParent != null) {
                 return accessibleParent;
             } else {
                 Container parent = getParent();
                 if (parent instanceof Accessible) {
                     return (Accessible) parent;
                 }
             }
             return null;
         }

         /**
          * Gets the index of this object in its accessible parent.
          *
          * @return the index of this object in its parent; or -1 if this
          *    object does not have an accessible parent
          * @see #getAccessibleParent
          */
         public int getAccessibleIndexInParent() {
             return Component.this.getAccessibleIndexInParent();
         }

         /**
          * Returns the number of accessible children in the object.  If all
          * of the children of this object implement <code>Accessible</code>,
          * then this method should return the number of children of this object.
          *
          * @return the number of accessible children in the object
          */
         public int getAccessibleChildrenCount() {
             return 0; // Components don't have children
         }

         /**
          * Returns the nth <code>Accessible</code> child of the object.
          *
          * @param i zero-based index of child
          * @return the nth <code>Accessible</code> child of the object
          */
         public Accessible getAccessibleChild(int i) {
             return null; // Components don't have children
         }

         /**
          * Returns the locale of this object.
          *
          * @return the locale of this object
          */
         public Locale getLocale() {
             return Component.this.getLocale();
         }

         /**
          * Gets the <code>AccessibleComponent</code> associated
          * with this object if one exists.
          * Otherwise return <code>null</code>.
          *
          * @return the component
          */
         public AccessibleComponent getAccessibleComponent() {
             return this;
         }


         // AccessibleComponent methods
         //
         /**
          * Gets the background color of this object.
          *
          * @return the background color, if supported, of the object;
          *      otherwise, <code>null</code>
          */
         public Color getBackground() {
             return Component.this.getBackground();
         }

         /**
          * Sets the background color of this object.
          * (For transparency, see <code>isOpaque</code>.)
          *
          * @param c the new <code>Color</code> for the background
          * @see Component#isOpaque
          */
         public void setBackground(Color c) {
             Component.this.setBackground(c);
         }

         /**
          * Gets the foreground color of this object.
          *
          * @return the foreground color, if supported, of the object;
          *     otherwise, <code>null</code>
          */
         public Color getForeground() {
             return Component.this.getForeground();
         }

         /**
          * Sets the foreground color of this object.
          *
          * @param c the new <code>Color</code> for the foreground
          */
         public void setForeground(Color c) {
             Component.this.setForeground(c);
         }

         /**
          * Gets the <code>Cursor</code> of this object.
          *
          * @return the <code>Cursor</code>, if supported,
          *     of the object; otherwise, <code>null</code>
          */
         public Cursor getCursor() {
             return Component.this.getCursor();
         }

         /**
          * Sets the <code>Cursor</code> of this object.
          * <p>
          * The method may have no visual effect if the Java platform
          * implementation and/or the native system do not support
          * changing the mouse cursor shape.
          * @param cursor the new <code>Cursor</code> for the object
          */
         public void setCursor(Cursor cursor) {
             Component.this.setCursor(cursor);
         }

         /**
          * Gets the <code>Font</code> of this object.
          *
          * @return the <code>Font</code>, if supported,
          *    for the object; otherwise, <code>null</code>
          */
         public Font getFont() {
             return Component.this.getFont();
         }

         /**
          * Sets the <code>Font</code> of this object.
          *
          * @param f the new <code>Font</code> for the object
          */
         public void setFont(Font f) {
             Component.this.setFont(f);
         }

         /**
          * Gets the <code>FontMetrics</code> of this object.
          *
          * @param f the <code>Font</code>
          * @return the <code>FontMetrics</code>, if supported,
          *     the object; otherwise, <code>null</code>
          * @see #getFont
          */
         public FontMetrics getFontMetrics(Font f) {
             if (f == null) {
                 return null;
             } else {
                 return Component.this.getFontMetrics(f);
             }
         }

         /**
          * Determines if the object is enabled.
          *
          * @return true if object is enabled; otherwise, false
          */
         public boolean isEnabled() {
             return Component.this.isEnabled();
         }

         /**
          * Sets the enabled state of the object.
          *
          * @param b if true, enables this object; otherwise, disables it
          */
         public void setEnabled(boolean b) {
             boolean old = Component.this.isEnabled();
             Component.this.setEnabled(b);
             if (b != old) {
                 if (accessibleContext != null) {
                     if (b) {
                         accessibleContext.firePropertyChange(
                                                              AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                              null, AccessibleState.ENABLED);
                     } else {
                         accessibleContext.firePropertyChange(
                                                              AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                              AccessibleState.ENABLED, null);
                     }
                 }
             }
         }

         /**
          * Determines if the object is visible.  Note: this means that the
          * object intends to be visible; however, it may not in fact be
          * showing on the screen because one of the objects that this object
          * is contained by is not visible.  To determine if an object is
          * showing on the screen, use <code>isShowing</code>.
          *
          * @return true if object is visible; otherwise, false
          */
         public boolean isVisible() {
             return Component.this.isVisible();
         }

         /**
          * Sets the visible state of the object.
          *
          * @param b if true, shows this object; otherwise, hides it
          */
         public void setVisible(boolean b) {
             boolean old = Component.this.isVisible();
             Component.this.setVisible(b);
             if (b != old) {
                 if (accessibleContext != null) {
                     if (b) {
                         accessibleContext.firePropertyChange(
                                                              AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                              null, AccessibleState.VISIBLE);
                     } else {
                         accessibleContext.firePropertyChange(
                                                              AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                                                              AccessibleState.VISIBLE, null);
                     }
                 }
             }
         }

         /**
          * Determines if the object is showing.  This is determined by checking
          * the visibility of the object and ancestors of the object.  Note:
          * this will return true even if the object is obscured by another
          * (for example, it happens to be underneath a menu that was pulled
          * down).
          *
          * @return true if object is showing; otherwise, false
          */
         public boolean isShowing() {
             return Component.this.isShowing();
         }

         /**
          * Checks whether the specified point is within this object's bounds,
          * where the point's x and y coordinates are defined to be relative to
          * the coordinate system of the object.
          *
          * @param p the <code>Point</code> relative to the
          *     coordinate system of the object
          * @return true if object contains <code>Point</code>; otherwise false
          */
         public boolean contains(Point p) {
             return Component.this.contains(p);
         }

         /**
          * Returns the location of the object on the screen.
          *
          * @return location of object on screen -- can be
          *    <code>null</code> if this object is not on the screen
          */
         public Point getLocationOnScreen() {
             synchronized (Component.this.getTreeLock()) {
                 if (Component.this.isShowing()) {
                     return Component.this.getLocationOnScreen();
                 } else {
                     return null;
                 }
             }
         }

         /**
          * Gets the location of the object relative to the parent in the form
          * of a point specifying the object's top-left corner in the screen's
          * coordinate space.
          *
          * @return an instance of Point representing the top-left corner of
          * the object's bounds in the coordinate space of the screen;
          * <code>null</code> if this object or its parent are not on the screen
          */
         public Point getLocation() {
             return Component.this.getLocation();
         }

         /**
          * Sets the location of the object relative to the parent.
          * @param p  the coordinates of the object
          */
         public void setLocation(Point p) {
             Component.this.setLocation(p);
         }

         /**
          * Gets the bounds of this object in the form of a Rectangle object.
          * The bounds specify this object's width, height, and location
          * relative to its parent.
          *
          * @return a rectangle indicating this component's bounds;
          *   <code>null</code> if this object is not on the screen
          */
         public Rectangle getBounds() {
             return Component.this.getBounds();
         }

         /**
          * Sets the bounds of this object in the form of a
          * <code>Rectangle</code> object.
          * The bounds specify this object's width, height, and location
          * relative to its parent.
          *
          * @param r a rectangle indicating this component's bounds
          */
         public void setBounds(Rectangle r) {
             Component.this.setBounds(r);
         }

         /**
          * Returns the size of this object in the form of a
          * <code>Dimension</code> object. The height field of the
          * <code>Dimension</code> object contains this objects's
          * height, and the width field of the <code>Dimension</code>
          * object contains this object's width.
          *
          * @return a <code>Dimension</code> object that indicates
          *     the size of this component; <code>null</code> if
          *     this object is not on the screen
          */
         public Dimension getSize() {
             return Component.this.getSize();
         }

         /**
          * Resizes this object so that it has width and height.
          *
          * @param d - the dimension specifying the new size of the object
          */
         public void setSize(Dimension d) {
             Component.this.setSize(d);
         }

         /**
          * Returns the <code>Accessible</code> child,
          * if one exists, contained at the local
          * coordinate <code>Point</code>.  Otherwise returns
          * <code>null</code>.
          *
          * @param p the point defining the top-left corner of
          *      the <code>Accessible</code>, given in the
          *      coordinate space of the object's parent
          * @return the <code>Accessible</code>, if it exists,
          *      at the specified location; else <code>null</code>
          */
         public Accessible getAccessibleAt(Point p) {
             return null; // Components don't have children
         }

         /**
          * Returns whether this object can accept focus or not.
          *
          * @return true if object can accept focus; otherwise false
          */
         public boolean isFocusTraversable() {
             return Component.this.isFocusTraversable();
         }

         /**
          * Requests focus for this object.
          */
         public void requestFocus() {
             Component.this.requestFocus();
         }

         /**
          * Adds the specified focus listener to receive focus events from this
          * component.
          *
          * @param l the focus listener
          */
         public void addFocusListener(FocusListener l) {
             Component.this.addFocusListener(l);
         }

         /**
          * Removes the specified focus listener so it no longer receives focus
          * events from this component.
          *
          * @param l the focus listener
          */
         public void removeFocusListener(FocusListener l) {
             Component.this.removeFocusListener(l);
         }

     } // inner class AccessibleAWTComponent


     /**
      * Gets the index of this object in its accessible parent.
      * If this object does not have an accessible parent, returns
      * -1.
      *
      * @return the index of this object in its accessible parent
      */
     int getAccessibleIndexInParent() {
         synchronized (getTreeLock()) {
             int index = -1;
             Container parent = this.getParent();
             if (parent != null && parent instanceof Accessible) {
                 Component ca[] = parent.getComponents();
                 for (int i = 0; i < ca.length; i++) {
                     if (ca[i] instanceof Accessible) {
                         index++;
                     }
                     if (this.equals(ca[i])) {
                         return index;
                     }
                 }
             }
             return -1;
         }
     }

     /**
      * Gets the current state set of this object.
      *
      * @return an instance of <code>AccessibleStateSet</code>
      *    containing the current state set of the object
      * @see AccessibleState
      */
     AccessibleStateSet getAccessibleStateSet() {
         synchronized (getTreeLock()) {
             AccessibleStateSet states = new AccessibleStateSet();
             if (this.isEnabled()) {
                 states.add(AccessibleState.ENABLED);
             }
             if (this.isFocusTraversable()) {
                 states.add(AccessibleState.FOCUSABLE);
             }
             if (this.isVisible()) {
                 states.add(AccessibleState.VISIBLE);
             }
             if (this.isShowing()) {
                 states.add(AccessibleState.SHOWING);
             }
             if (this.isFocusOwner()) {
                 states.add(AccessibleState.FOCUSED);
             }
             if (this instanceof Accessible) {
                 AccessibleContext ac = ((Accessible) this).getAccessibleContext();
                 if (ac != null) {
                     Accessible ap = ac.getAccessibleParent();
                     if (ap != null) {
                         AccessibleContext pac = ap.getAccessibleContext();
                         if (pac != null) {
                             AccessibleSelection as = pac.getAccessibleSelection();
                             if (as != null) {
                                 states.add(AccessibleState.SELECTABLE);
                                 int i = ac.getAccessibleIndexInParent();
                                 if (i >= 0) {
                                     if (as.isAccessibleChildSelected(i)) {
                                         states.add(AccessibleState.SELECTED);
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
             if (Component.isInstanceOf(this, "javax.swing.JComponent")) {
                 if (((javax.swing.JComponent) this).isOpaque()) {
                     states.add(AccessibleState.OPAQUE);
                 }
             }
             return states;
         }
     }

     /**
      * Checks that the given object is instance of the given class.
      * @param obj Object to be checked
      * @param className The name of the class. Must be fully-qualified class name.
      * @return true, if this object is instanceof given class,
      *         false, otherwise, or if obj or className is null
      */
     static boolean isInstanceOf(Object obj, String className) {
         if (obj == null) return false;
         if (className == null) return false;

         Class cls = obj.getClass();
         while (cls != null) {
             if (cls.getName().equals(className)) {
                 return true;
             }
             cls = cls.getSuperclass();
         }
         return false;
     }


     // ************************** MIXING CODE *******************************

     /**
      * Check whether we can trust the current bounds of the component.
      * The return value of false indicates that the container of the
      * component is invalid, and therefore needs to be layed out, which would
      * probably mean changing the bounds of its children.
      * Null-layout of the container or absence of the container mean
      * the bounds of the component are final and can be trusted.
      */
     final boolean areBoundsValid() {
         Container cont = getContainer();
         return cont == null || cont.isValid() || cont.getLayout() == null;
     }

     /**
      * Applies the shape to the component
      * @param shape Shape to be applied to the component
      */
     void applyCompoundShape(Region shape) {
         checkTreeLock();

         if (!areBoundsValid()) {
             if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                 mixingLog.fine("this = " + this + "; areBoundsValid = " + areBoundsValid());
             }
             return;
         }

         if (!isLightweight()) {
             ComponentPeer peer = getPeer();
             if (peer != null) {
                 // The Region class has some optimizations. That's why
                 // we should manually check whether it's empty and
                 // substitute the object ourselves. Otherwise we end up
                 // with some incorrect Region object with loX being
                 // greater than the hiX for instance.
                 if (shape.isEmpty()) {
                     shape = Region.EMPTY_REGION;
                 }


                 // Note: the shape is not really copied/cloned. We create
                 // the Region object ourselves, so there's no any possibility
                 // to modify the object outside of the mixing code.
                 // Nullifying compoundShape means that the component has normal shape
                 // (or has no shape at all).
                 if (shape.equals(getNormalShape())) {
                     if (this.compoundShape == null) {
                         return;
                     }
                     this.compoundShape = null;
                     peer.applyShape(null);
                 } else {
                     if (shape.equals(getAppliedShape())) {
                         return;
                     }
                     this.compoundShape = shape;
                     Point compAbsolute = getLocationOnWindow();
                     if (mixingLog.isLoggable(PlatformLogger.FINER)) {
                         mixingLog.fine("this = " + this +
                                 "; compAbsolute=" + compAbsolute + "; shape=" + shape);
                     }
                     peer.applyShape(shape.getTranslatedRegion(-compAbsolute.x, -compAbsolute.y));
                 }
             }
         }
     }

     /**
      * Returns the shape previously set with applyCompoundShape().
      * If the component is LW or no shape was applied yet,
      * the method returns the normal shape.
      */
     private Region getAppliedShape() {
         checkTreeLock();
         //XXX: if we allow LW components to have a shape, this must be changed
         return (this.compoundShape == null || isLightweight()) ? getNormalShape() : this.compoundShape;
     }

     Point getLocationOnWindow() {
         checkTreeLock();
         Point curLocation = getLocation();

         for (Container parent = getContainer();
                 parent != null && !(parent instanceof Window);
                 parent = parent.getContainer())
         {
             curLocation.x += parent.getX();
             curLocation.y += parent.getY();
         }

         return curLocation;
     }

     /**
      * Returns the full shape of the component located in window coordinates
      */
     final Region getNormalShape() {
         checkTreeLock();
         //XXX: we may take into account a user-specified shape for this component
         Point compAbsolute = getLocationOnWindow();
         return
             Region.getInstanceXYWH(
                     compAbsolute.x,
                     compAbsolute.y,
                     getWidth(),
                     getHeight()
             );
     }

     /**
      * Returns the "opaque shape" of the component.
      *
      * The opaque shape of a lightweight components is the actual shape that
      * needs to be cut off of the heavyweight components in order to mix this
      * lightweight component correctly with them.
      *
      * The method is overriden in the java.awt.Container to handle non-opaque
      * containers containing opaque children.
      *
      * See 6637655 for details.
      */
     Region getOpaqueShape() {
         checkTreeLock();
         if (mixingCutoutRegion != null) {
             return mixingCutoutRegion;
         } else {
             return getNormalShape();
         }
     }

     final int getSiblingIndexAbove() {
         checkTreeLock();
         Container parent = getContainer();
         if (parent == null) {
             return -1;
         }

         int nextAbove = parent.getComponentZOrder(this) - 1;

         return nextAbove < 0 ? -1 : nextAbove;
     }

     final ComponentPeer getHWPeerAboveMe() {
         checkTreeLock();

         Container cont = getContainer();
         int indexAbove = getSiblingIndexAbove();

         while (cont != null) {
             for (int i = indexAbove; i > -1; i--) {
                 Component comp = cont.getComponent(i);
                 if (comp != null && comp.isDisplayable() && !comp.isLightweight()) {
                     return comp.getPeer();
                 }
             }
             // traversing the hierarchy up to the closest HW container;
             // further traversing may return a component that is not actually
             // a native sibling of this component and this kind of z-order
             // request may not be allowed by the underlying system (6852051).
             if (!cont.isLightweight()) {
                 break;
             }

             indexAbove = cont.getSiblingIndexAbove();
             cont = cont.getContainer();
         }

         return null;
     }

     final int getSiblingIndexBelow() {
         checkTreeLock();
         Container parent = getContainer();
         if (parent == null) {
             return -1;
         }

         int nextBelow = parent.getComponentZOrder(this) + 1;

         return nextBelow >= parent.getComponentCount() ? -1 : nextBelow;
     }

     final boolean isNonOpaqueForMixing() {
         return mixingCutoutRegion != null &&
             mixingCutoutRegion.isEmpty();
     }

     private Region calculateCurrentShape() {
         checkTreeLock();
         Region s = getNormalShape();

         if (mixingLog.isLoggable(PlatformLogger.FINE)) {
             mixingLog.fine("this = " + this + "; normalShape=" + s);
         }

         if (getContainer() != null) {
             Component comp = this;
             Container cont = comp.getContainer();

             while (cont != null) {
                 for (int index = comp.getSiblingIndexAbove(); index != -1; --index) {
                     /* It is assumed that:
                      *
                      *    getComponent(getContainer().getComponentZOrder(comp)) == comp
                      *
                      * The assumption has been made according to the current
                      * implementation of the Container class.
                      */
                     Component c = cont.getComponent(index);
                     if (c.isLightweight() && c.isShowing()) {
                         s = s.getDifference(c.getOpaqueShape());
                     }
                 }

                 if (cont.isLightweight()) {
                     s = s.getIntersection(cont.getNormalShape());
                 } else {
                     break;
                 }

                 comp = cont;
                 cont = cont.getContainer();
             }
         }

         if (mixingLog.isLoggable(PlatformLogger.FINE)) {
             mixingLog.fine("currentShape=" + s);
         }

         return s;
     }

     void applyCurrentShape() {
         checkTreeLock();
         if (!areBoundsValid()) {
             if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                 mixingLog.fine("this = " + this + "; areBoundsValid = " + areBoundsValid());
             }
             return; // Because applyCompoundShape() ignores such components anyway
         }
         if (mixingLog.isLoggable(PlatformLogger.FINE)) {
             mixingLog.fine("this = " + this);
         }
         applyCompoundShape(calculateCurrentShape());
     }

     final void subtractAndApplyShape(Region s) {
         checkTreeLock();

         if (mixingLog.isLoggable(PlatformLogger.FINE)) {
             mixingLog.fine("this = " + this + "; s=" + s);
         }

         applyCompoundShape(getAppliedShape().getDifference(s));
     }

     private final void applyCurrentShapeBelowMe() {
         checkTreeLock();
         Container parent = getContainer();
         if (parent != null && parent.isShowing()) {
             // First, reapply shapes of my siblings
             parent.recursiveApplyCurrentShape(getSiblingIndexBelow());

             // Second, if my container is non-opaque, reapply shapes of siblings of my container
             Container parent2 = parent.getContainer();
             while (!parent.isOpaque() && parent2 != null) {
                 parent2.recursiveApplyCurrentShape(parent.getSiblingIndexBelow());

                 parent = parent2;
                 parent2 = parent.getContainer();
             }
         }
     }

     final void subtractAndApplyShapeBelowMe() {
         checkTreeLock();
         Container parent = getContainer();
         if (parent != null && isShowing()) {
             Region opaqueShape = getOpaqueShape();

             // First, cut my siblings
             parent.recursiveSubtractAndApplyShape(opaqueShape, getSiblingIndexBelow());

             // Second, if my container is non-opaque, cut siblings of my container
             Container parent2 = parent.getContainer();
             while (!parent.isOpaque() && parent2 != null) {
                 parent2.recursiveSubtractAndApplyShape(opaqueShape, parent.getSiblingIndexBelow());

                 parent = parent2;
                 parent2 = parent.getContainer();
             }
         }
     }

     void mixOnShowing() {
         synchronized (getTreeLock()) {
             if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                 mixingLog.fine("this = " + this);
             }
             if (!isMixingNeeded()) {
                 return;
             }
             if (isLightweight()) {
                 subtractAndApplyShapeBelowMe();
             } else {
                 applyCurrentShape();
             }
         }
     }

     void mixOnHiding(boolean isLightweight) {
         // We cannot be sure that the peer exists at this point, so we need the argument
         //    to find out whether the hiding component is (well, actually was) a LW or a HW.
         synchronized (getTreeLock()) {
             if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                 mixingLog.fine("this = " + this + "; isLightweight = " + isLightweight);
             }
             if (!isMixingNeeded()) {
                 return;
             }
             if (isLightweight) {
                 applyCurrentShapeBelowMe();
             }
         }
     }

     void mixOnReshaping() {
         synchronized (getTreeLock()) {
             if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                 mixingLog.fine("this = " + this);
              }
              if (!isMixingNeeded()) {
                  return;
              }
              if (isLightweight()) {
                  applyCurrentShapeBelowMe();
              } else {
                  applyCurrentShape();
              }
          }
      }

      void mixOnZOrderChanging(int oldZorder, int newZorder) {
          synchronized (getTreeLock()) {
              boolean becameHigher = newZorder < oldZorder;
              Container parent = getContainer();

              if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                  mixingLog.fine("this = " + this +
                      "; oldZorder=" + oldZorder + "; newZorder=" + newZorder + "; parent=" + parent);
              }
              if (!isMixingNeeded()) {
                  return;
              }
              if (isLightweight()) {
                  if (becameHigher) {
                      if (parent != null && isShowing()) {
                          parent.recursiveSubtractAndApplyShape(getOpaqueShape(), getSiblingIndexBelow(), oldZorder);
                      }
                  } else {
                      if (parent != null) {
                          parent.recursiveApplyCurrentShape(oldZorder, newZorder);
                      }
                  }
              } else {
                  if (becameHigher) {
                      applyCurrentShape();
                  } else {
                      if (parent != null) {
                          Region shape = getAppliedShape();

                          for (int index = oldZorder; index < newZorder; index++) {
                              Component c = parent.getComponent(index);
                              if (c.isLightweight() && c.isShowing()) {
                                  shape = shape.getDifference(c.getOpaqueShape());
                              }
                          }
                          applyCompoundShape(shape);
                      }
                  }
              }
          }
      }

      void mixOnValidating() {
          // This method gets overriden in the Container. Obviously, a plain
          // non-container components don't need to handle validation.
      }

      final boolean isMixingNeeded() {
          if (SunToolkit.getSunAwtDisableMixing()) {
              if (mixingLog.isLoggable(PlatformLogger.FINEST)) {
                  mixingLog.finest("this = " + this + "; Mixing disabled via sun.awt.disableMixing");
              }
              return false;
          }
          if (!areBoundsValid()) {
              if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                  mixingLog.fine("this = " + this + "; areBoundsValid = " + areBoundsValid());
              }
              return false;
          }
          Window window = getContainingWindow();
          if (window != null) {
              if (!window.hasHeavyweightDescendants() || !window.hasLightweightDescendants()) {
                  if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                      mixingLog.fine("containing window = " + window +
                              "; has h/w descendants = " + window.hasHeavyweightDescendants() +
                              "; has l/w descendants = " + window.hasLightweightDescendants());
                  }
                  return false;
              }
          } else {
              if (mixingLog.isLoggable(PlatformLogger.FINE)) {
                  mixingLog.fine("this = " + this + "; containing window is null");
              }
              return false;
          }
          return true;
      }

      // ****************** END OF MIXING CODE ********************************

      // Note that the method is overriden in the Window class,
      // a window doesn't need to be updated in the Z-order.
      void updateZOrder() {
          peer.setZOrder(getHWPeerAboveMe());
      }

  }