/*
    * Copyright (c) 1997, 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 javax.swing;
  
  
  import java.util.HashSet;
  import java.util.Hashtable;
  import java.util.Dictionary;
  import java.util.Enumeration;
  import java.util.Locale;
  import java.util.Vector;
  import java.util.EventListener;
  import java.util.Set;
  import java.util.Map;
  import java.util.HashMap;
  
  import java.awt.*;
  import java.awt.event.*;
  import java.awt.image.VolatileImage;
  import java.awt.Graphics2D;
  import java.awt.peer.LightweightPeer;
  import java.awt.dnd.DropTarget;
  import java.awt.font.FontRenderContext;
  import java.beans.PropertyChangeListener;
  import java.beans.VetoableChangeListener;
  import java.beans.VetoableChangeSupport;
  import java.beans.Transient;
  
  import java.applet.Applet;
  
  import java.io.Serializable;
  import java.io.ObjectOutputStream;
  import java.io.ObjectInputStream;
  import java.io.IOException;
  import java.io.ObjectInputValidation;
  import java.io.InvalidObjectException;
  
  import javax.swing.border.*;
  import javax.swing.event.*;
  import javax.swing.plaf.*;
  import static javax.swing.ClientPropertyKey.*;
  import javax.accessibility.*;
  
  import sun.swing.SwingUtilities2;
  import sun.swing.UIClientPropertyKey;
  
  /**
   * The base class for all Swing components except top-level containers.
   * To use a component that inherits from <code>JComponent</code>,
   * you must place the component in a containment hierarchy
   * whose root is a top-level Swing container.
   * Top-level Swing containers --
   * such as <code>JFrame</code>, <code>JDialog</code>,
   * and <code>JApplet</code> --
   * are specialized components
   * that provide a place for other Swing components to paint themselves.
   * For an explanation of containment hierarchies, see
   * <a
   href="http://java.sun.com/docs/books/tutorial/uiswing/overview/hierarchy.html">Swing Components and the Containment Hierarchy</a>,
   * a section in <em>The Java Tutorial</em>.
   *
   * <p>
   * The <code>JComponent</code> class provides:
   * <ul>
   * <li>The base class for both standard and custom components
   *     that use the Swing architecture.
   * <li>A "pluggable look and feel" (L&F) that can be specified by the
   *     programmer or (optionally) selected by the user at runtime.
   *     The look and feel for each component is provided by a
   *     <em>UI delegate</em> -- an object that descends from
   *     {@link javax.swing.plaf.ComponentUI}.
   *     See <a
   * href="http://java.sun.com/docs/books/tutorial/uiswing/misc/plaf.html">How
   *     to Set the Look and Feel</a>
   *     in <em>The Java Tutorial</em>
   *     for more information.
   * <li>Comprehensive keystroke handling.
  *     See the document <a
  * href="http://java.sun.com/products/jfc/tsc/special_report/kestrel/keybindings.html">Keyboard
  *     Bindings in Swing</a>,
  *     an article in <em>The Swing Connection</em>,
  *     for more information.
  * <li>Support for tool tips --
  *     short descriptions that pop up when the cursor lingers
  *     over a component.
  *     See <a
  * href="http://java.sun.com/docs/books/tutorial/uiswing/components/tooltip.html">How
  *     to Use Tool Tips</a>
  *     in <em>The Java Tutorial</em>
  *     for more information.
  * <li>Support for accessibility.
  *     <code>JComponent</code> contains all of the methods in the
  *     <code>Accessible</code> interface,
  *     but it doesn't actually implement the interface.  That is the
  *     responsibility of the individual classes
  *     that extend <code>JComponent</code>.
  * <li>Support for component-specific properties.
  *     With the {@link #putClientProperty}
  *     and {@link #getClientProperty} methods,
  *     you can associate name-object pairs
  *     with any object that descends from <code>JComponent</code>.
  * <li>An infrastructure for painting
  *     that includes double buffering and support for borders.
  *     For more information see <a
  * href="http://java.sun.com/docs/books/tutorial/uiswing/overview/draw.html">Painting</a> and
  * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/border.html">How
  *     to Use Borders</a>,
  *     both of which are sections in <em>The Java Tutorial</em>.
  * </ul>
  * For more information on these subjects, see the
  * <a href="package-summary.html#package_description">Swing package description</a>
  * and <em>The Java Tutorial</em> section
  * <a href="http://java.sun.com/docs/books/tutorial/uiswing/components/jcomponent.html">The JComponent Class</a>.
  * <p>
  * <code>JComponent</code> and its subclasses document default values
  * for certain properties.  For example, <code>JTable</code> documents the
  * default row height as 16.  Each <code>JComponent</code> subclass
  * that has a <code>ComponentUI</code> will create the
  * <code>ComponentUI</code> as part of its constructor.  In order
  * to provide a particular look and feel each
  * <code>ComponentUI</code> may set properties back on the
  * <code>JComponent</code> that created it.  For example, a custom
  * look and feel may require <code>JTable</code>s to have a row
  * height of 24. The documented defaults are the value of a property
  * BEFORE the <code>ComponentUI</code> has been installed.  If you
  * need a specific value for a particular property you should
  * explicitly set it.
  * <p>
  * In release 1.4, the focus subsystem was rearchitected.
  * For more information, 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>.
  * <p>
  * <strong>Warning:</strong> Swing is not thread safe. For more
  * information see <a
  * href="package-summary.html#threading">Swing's Threading
  * Policy</a>.
  * <p>
  * <strong>Warning:</strong>
  * Serialized objects of this class will not be compatible with
  * future Swing releases. The current serialization support is
  * appropriate for short term storage or RMI between applications running
  * the same version of Swing.  As of 1.4, support for long term storage
  * of all JavaBeans<sup><font size="-2">TM</font></sup>
  * has been added to the <code>java.beans</code> package.
  * Please see {@link java.beans.XMLEncoder}.
  *
  * @see KeyStroke
  * @see Action
  * @see #setBorder
  * @see #registerKeyboardAction
  * @see JOptionPane
  * @see #setDebugGraphicsOptions
  * @see #setToolTipText
  * @see #setAutoscrolls
  *
  * @author Hans Muller
  * @author Arnaud Weber
  */
 public abstract class JComponent extends Container implements Serializable,
                                               TransferHandler.HasGetTransferHandler
 {
     /**
      * @see #getUIClassID
      * @see #writeObject
      */
     private static final String uiClassID = "ComponentUI";
 
     /**
      * @see #readObject
      */
     private static final Hashtable<ObjectInputStream, ReadObjectCallback> readObjectCallbacks =
             new Hashtable<ObjectInputStream, ReadObjectCallback>(1);
 
     /**
      * Keys to use for forward focus traversal when the JComponent is
      * managing focus.
      */
     private static Set<KeyStroke> managingFocusForwardTraversalKeys;
 
     /**
      * Keys to use for backward focus traversal when the JComponent is
      * managing focus.
      */
     private static Set<KeyStroke> managingFocusBackwardTraversalKeys;
 
     // Following are the possible return values from getObscuredState.
     private static final int NOT_OBSCURED = 0;
     private static final int PARTIALLY_OBSCURED = 1;
     private static final int COMPLETELY_OBSCURED = 2;
 
     /**
      * Set to true when DebugGraphics has been loaded.
      */
     static boolean DEBUG_GRAPHICS_LOADED;
 
     /**
      * Key used to look up a value from the AppContext to determine the
      * JComponent the InputVerifier is running for. That is, if
      * AppContext.get(INPUT_VERIFIER_SOURCE_KEY) returns non-null, it
      * indicates the EDT is calling into the InputVerifier from the
      * returned component.
      */
     private static final Object INPUT_VERIFIER_SOURCE_KEY =
             new StringBuilder("InputVerifierSourceKey");
 
     /* The following fields support set methods for the corresponding
      * java.awt.Component properties.
      */
     private boolean isAlignmentXSet;
     private float alignmentX;
     private boolean isAlignmentYSet;
     private float alignmentY;
 
     /**
      * Backing store for JComponent properties and listeners
      */
 
     /** The look and feel delegate for this component. */
     protected transient ComponentUI ui;
     /** A list of event listeners for this component. */
     protected EventListenerList listenerList = new EventListenerList();
 
     private transient ArrayTable clientProperties;
     private VetoableChangeSupport vetoableChangeSupport;
     /**
      * Whether or not autoscroll has been enabled.
      */
     private boolean autoscrolls;
     private Border border;
     private int flags;
 
     /* Input verifier for this component */
     private InputVerifier inputVerifier = null;
 
     private boolean verifyInputWhenFocusTarget = true;
 
     /**
      * Set in <code>_paintImmediately</code>.
      * Will indicate the child that initiated the painting operation.
      * If <code>paintingChild</code> is opaque, no need to paint
      * any child components after <code>paintingChild</code>.
      * Test used in <code>paintChildren</code>.
      */
     transient Component         paintingChild;
 
     /**
      * Constant used for <code>registerKeyboardAction</code> that
      * means that the command should be invoked when
      * the component has the focus.
      */
     public static final int WHEN_FOCUSED = 0;
 
     /**
      * Constant used for <code>registerKeyboardAction</code> that
      * means that the command should be invoked when the receiving
      * component is an ancestor of the focused component or is
      * itself the focused component.
      */
     public static final int WHEN_ANCESTOR_OF_FOCUSED_COMPONENT = 1;
 
     /**
      * Constant used for <code>registerKeyboardAction</code> that
      * means that the command should be invoked when
      * the receiving component is in the window that has the focus
      * or is itself the focused component.
      */
     public static final int WHEN_IN_FOCUSED_WINDOW = 2;
 
     /**
      * Constant used by some of the APIs to mean that no condition is defined.
      */
     public static final int UNDEFINED_CONDITION = -1;
 
     /**
      * The key used by <code>JComponent</code> to access keyboard bindings.
      */
     private static final String KEYBOARD_BINDINGS_KEY = "_KeyboardBindings";
 
     /**
      * An array of <code>KeyStroke</code>s used for
      * <code>WHEN_IN_FOCUSED_WINDOW</code> are stashed
      * in the client properties under this string.
      */
     private static final String WHEN_IN_FOCUSED_WINDOW_BINDINGS = "_WhenInFocusedWindow";
 
     /**
      * The comment to display when the cursor is over the component,
      * also known as a "value tip", "flyover help", or "flyover label".
      */
     public static final String TOOL_TIP_TEXT_KEY = "ToolTipText";
 
     private static final String NEXT_FOCUS = "nextFocus";
 
     /**
      * <code>JPopupMenu</code> assigned to this component
      * and all of its childrens
      */
     private JPopupMenu popupMenu;
 
     /** Private flags **/
     private static final int IS_DOUBLE_BUFFERED                       =  0;
     private static final int ANCESTOR_USING_BUFFER                    =  1;
     private static final int IS_PAINTING_TILE                         =  2;
     private static final int IS_OPAQUE                                =  3;
     private static final int KEY_EVENTS_ENABLED                       =  4;
     private static final int FOCUS_INPUTMAP_CREATED                   =  5;
     private static final int ANCESTOR_INPUTMAP_CREATED                =  6;
     private static final int WIF_INPUTMAP_CREATED                     =  7;
     private static final int ACTIONMAP_CREATED                        =  8;
     private static final int CREATED_DOUBLE_BUFFER                    =  9;
     // bit 10 is free
     private static final int IS_PRINTING                              = 11;
     private static final int IS_PRINTING_ALL                          = 12;
     private static final int IS_REPAINTING                            = 13;
     /** Bits 14-21 are used to handle nested writeObject calls. **/
     private static final int WRITE_OBJ_COUNTER_FIRST                  = 14;
     private static final int RESERVED_1                               = 15;
     private static final int RESERVED_2                               = 16;
     private static final int RESERVED_3                               = 17;
     private static final int RESERVED_4                               = 18;
     private static final int RESERVED_5                               = 19;
     private static final int RESERVED_6                               = 20;
     private static final int WRITE_OBJ_COUNTER_LAST                   = 21;
 
     private static final int REQUEST_FOCUS_DISABLED                   = 22;
     private static final int INHERITS_POPUP_MENU                      = 23;
     private static final int OPAQUE_SET                               = 24;
     private static final int AUTOSCROLLS_SET                          = 25;
     private static final int FOCUS_TRAVERSAL_KEYS_FORWARD_SET         = 26;
     private static final int FOCUS_TRAVERSAL_KEYS_BACKWARD_SET        = 27;
     private static final int REVALIDATE_RUNNABLE_SCHEDULED            = 28;
 
     /**
      * Temporary rectangles.
      */
     private static java.util.List<Rectangle> tempRectangles = new java.util.ArrayList<Rectangle>(11);
 
     /** Used for <code>WHEN_FOCUSED</code> bindings. */
     private InputMap focusInputMap;
     /** Used for <code>WHEN_ANCESTOR_OF_FOCUSED_COMPONENT</code> bindings. */
     private InputMap ancestorInputMap;
     /** Used for <code>WHEN_IN_FOCUSED_KEY</code> bindings. */
     private ComponentInputMap windowInputMap;
 
     /** ActionMap. */
     private ActionMap actionMap;
 
     /** Key used to store the default locale in an AppContext **/
     private static final String defaultLocale = "JComponent.defaultLocale";
 
     private static Component componentObtainingGraphicsFrom;
     private static Object componentObtainingGraphicsFromLock = new
             StringBuilder("componentObtainingGraphicsFrom");
 
     /**
      * AA text hints.
      */
     transient private Object aaTextInfo;
 
     static Graphics safelyGetGraphics(Component c) {
         return safelyGetGraphics(c, SwingUtilities.getRoot(c));
     }
 
     static Graphics safelyGetGraphics(Component c, Component root) {
         synchronized(componentObtainingGraphicsFromLock) {
             componentObtainingGraphicsFrom = root;
             Graphics g = c.getGraphics();
             componentObtainingGraphicsFrom = null;
             return g;
         }
     }
 
     static void getGraphicsInvoked(Component root) {
         if (!JComponent.isComponentObtainingGraphicsFrom(root)) {
             JRootPane rootPane = ((RootPaneContainer)root).getRootPane();
             if (rootPane != null) {
                 rootPane.disableTrueDoubleBuffering();
             }
         }
     }
 
 
     /**
      * Returns true if {@code c} is the component the graphics is being
      * requested of. This is intended for use when getGraphics is invoked.
      */
     private static boolean isComponentObtainingGraphicsFrom(Component c) {
         synchronized(componentObtainingGraphicsFromLock) {
             return (componentObtainingGraphicsFrom == c);
         }
     }
 
     /**
      * Returns the Set of <code>KeyStroke</code>s to use if the component
      * is managing focus for forward focus traversal.
      */
     static Set<KeyStroke> getManagingFocusForwardTraversalKeys() {
         synchronized(JComponent.class) {
             if (managingFocusForwardTraversalKeys == null) {
                 managingFocusForwardTraversalKeys = new HashSet<KeyStroke>(1);
                 managingFocusForwardTraversalKeys.add(
                     KeyStroke.getKeyStroke(KeyEvent.VK_TAB,
                                            InputEvent.CTRL_MASK));
             }
         }
         return managingFocusForwardTraversalKeys;
     }
 
     /**
      * Returns the Set of <code>KeyStroke</code>s to use if the component
      * is managing focus for backward focus traversal.
      */
     static Set<KeyStroke> getManagingFocusBackwardTraversalKeys() {
         synchronized(JComponent.class) {
             if (managingFocusBackwardTraversalKeys == null) {
                 managingFocusBackwardTraversalKeys = new HashSet<KeyStroke>(1);
                 managingFocusBackwardTraversalKeys.add(
                     KeyStroke.getKeyStroke(KeyEvent.VK_TAB,
                                            InputEvent.SHIFT_MASK |
                                            InputEvent.CTRL_MASK));
             }
         }
         return managingFocusBackwardTraversalKeys;
     }
 
     private static Rectangle fetchRectangle() {
         synchronized(tempRectangles) {
             Rectangle rect;
             int size = tempRectangles.size();
             if (size > 0) {
                 rect = tempRectangles.remove(size - 1);
             }
             else {
                 rect = new Rectangle(0, 0, 0, 0);
             }
             return rect;
         }
     }
 
     private static void recycleRectangle(Rectangle rect) {
         synchronized(tempRectangles) {
             tempRectangles.add(rect);
         }
     }
 
     /**
      * Sets whether or not <code>getComponentPopupMenu</code> should delegate
      * to the parent if this component does not have a <code>JPopupMenu</code>
      * assigned to it.
      * <p>
      * The default value for this is false, but some <code>JComponent</code>
      * subclasses that are implemented as a number of <code>JComponent</code>s
      * may set this to true.
      * <p>
      * This is a bound property.
      *
      * @param value whether or not the JPopupMenu is inherited
      * @see #setComponentPopupMenu
      * @beaninfo
      *        bound: true
      *  description: Whether or not the JPopupMenu is inherited
      * @since 1.5
      */
     public void setInheritsPopupMenu(boolean value) {
         boolean oldValue = getFlag(INHERITS_POPUP_MENU);
         setFlag(INHERITS_POPUP_MENU, value);
         firePropertyChange("inheritsPopupMenu", oldValue, value);
     }
 
     /**
      * Returns true if the JPopupMenu should be inherited from the parent.
      *
      * @see #setComponentPopupMenu
      * @since 1.5
      */
     public boolean getInheritsPopupMenu() {
         return getFlag(INHERITS_POPUP_MENU);
     }
 
     /**
      * Sets the <code>JPopupMenu</code> for this <code>JComponent</code>.
      * The UI is responsible for registering bindings and adding the necessary
      * listeners such that the <code>JPopupMenu</code> will be shown at
      * the appropriate time. When the <code>JPopupMenu</code> is shown
      * depends upon the look and feel: some may show it on a mouse event,
      * some may enable a key binding.
      * <p>
      * If <code>popup</code> is null, and <code>getInheritsPopupMenu</code>
      * returns true, then <code>getComponentPopupMenu</code> will be delegated
      * to the parent. This provides for a way to make all child components
      * inherit the popupmenu of the parent.
      * <p>
      * This is a bound property.
      *
      * @param popup - the popup that will be assigned to this component
      *                may be null
      * @see #getComponentPopupMenu
      * @beaninfo
      *        bound: true
      *    preferred: true
      *  description: Popup to show
      * @since 1.5
      */
     public void setComponentPopupMenu(JPopupMenu popup) {
         if(popup != null) {
             enableEvents(AWTEvent.MOUSE_EVENT_MASK);
         }
         JPopupMenu oldPopup = this.popupMenu;
         this.popupMenu = popup;
         firePropertyChange("componentPopupMenu", oldPopup, popup);
     }
 
     /**
      * Returns <code>JPopupMenu</code> that assigned for this component.
      * If this component does not have a <code>JPopupMenu</code> assigned
      * to it and <code>getInheritsPopupMenu</code> is true, this
      * will return <code>getParent().getComponentPopupMenu()</code> (assuming
      * the parent is valid.)
      *
      * @return <code>JPopupMenu</code> assigned for this component
      *         or <code>null</code> if no popup assigned
      * @see #setComponentPopupMenu
      * @since 1.5
      */
     public JPopupMenu getComponentPopupMenu() {
 
         if(!getInheritsPopupMenu()) {
             return popupMenu;
         }
 
         if(popupMenu == null) {
             // Search parents for its popup
             Container parent = getParent();
             while (parent != null) {
                 if(parent instanceof JComponent) {
                     return ((JComponent)parent).getComponentPopupMenu();
                 }
                 if(parent instanceof Window ||
                    parent instanceof Applet) {
                     // Reached toplevel, break and return null
                     break;
                 }
                 parent = parent.getParent();
             }
             return null;
         }
 
         return popupMenu;
     }
 
     /**
      * Default <code>JComponent</code> constructor.  This constructor does
      * very little initialization beyond calling the <code>Container</code>
      * constructor.  For example, the initial layout manager is
      * <code>null</code>. It does, however, set the component's locale
      * property to the value returned by
      * <code>JComponent.getDefaultLocale</code>.
      *
      * @see #getDefaultLocale
      */
     public JComponent() {
         super();
         // We enable key events on all JComponents so that accessibility
         // bindings will work everywhere. This is a partial fix to BugID
         // 4282211.
         enableEvents(AWTEvent.KEY_EVENT_MASK);
         if (isManagingFocus()) {
             LookAndFeel.installProperty(this,
                                         "focusTraversalKeysForward",
                                   getManagingFocusForwardTraversalKeys());
             LookAndFeel.installProperty(this,
                                         "focusTraversalKeysBackward",
                                   getManagingFocusBackwardTraversalKeys());
         }
 
         super.setLocale( JComponent.getDefaultLocale() );
     }
 
 
     /**
      * Resets the UI property to a value from the current look and feel.
      * <code>JComponent</code> subclasses must override this method
      * like this:
      * <pre>
      *   public void updateUI() {
      *      setUI((SliderUI)UIManager.getUI(this);
      *   }
      *  </pre>
      *
      * @see #setUI
      * @see UIManager#getLookAndFeel
      * @see UIManager#getUI
      */
     public void updateUI() {}
 
 
     /**
      * Sets the look and feel delegate for this component.
      * <code>JComponent</code> subclasses generally override this method
      * to narrow the argument type. For example, in <code>JSlider</code>:
      * <pre>
      * public void setUI(SliderUI newUI) {
      *     super.setUI(newUI);
      * }
      *  </pre>
      * <p>
      * Additionally <code>JComponent</code> subclasses must provide a
      * <code>getUI</code> method that returns the correct type.  For example:
      * <pre>
      * public SliderUI getUI() {
      *     return (SliderUI)ui;
      * }
      * </pre>
      *
      * @param newUI the new UI delegate
      * @see #updateUI
      * @see UIManager#getLookAndFeel
      * @see UIManager#getUI
      * @beaninfo
      *        bound: true
      *       hidden: true
      *    attribute: visualUpdate true
      *  description: The component's look and feel delegate.
      */
     protected void setUI(ComponentUI newUI) {
         /* We do not check that the UI instance is different
          * before allowing the switch in order to enable the
          * same UI instance *with different default settings*
          * to be installed.
          */
 
         uninstallUIAndProperties();
 
         // aaText shouldn't persist between look and feels, reset it.
         aaTextInfo =
             UIManager.getDefaults().get(SwingUtilities2.AA_TEXT_PROPERTY_KEY);
         ComponentUI oldUI = ui;
         ui = newUI;
         if (ui != null) {
             ui.installUI(this);
         }
 
         firePropertyChange("UI", oldUI, newUI);
         revalidate();
         repaint();
     }
 
     /**
      * Uninstalls the UI, if any, and any client properties designated
      * as being specific to the installed UI - instances of
      * {@code UIClientPropertyKey}.
      */
     private void uninstallUIAndProperties() {
         if (ui != null) {
             ui.uninstallUI(this);
             //clean UIClientPropertyKeys from client properties
             if (clientProperties != null) {
                 synchronized(clientProperties) {
                     Object[] clientPropertyKeys =
                         clientProperties.getKeys(null);
                     if (clientPropertyKeys != null) {
                         for (Object key : clientPropertyKeys) {
                             if (key instanceof UIClientPropertyKey) {
                                 putClientProperty(key, null);
                             }
                         }
                     }
                 }
             }
         }
     }
 
     /**
      * Returns the <code>UIDefaults</code> key used to
      * look up the name of the <code>swing.plaf.ComponentUI</code>
      * class that defines the look and feel
      * for this component.  Most applications will never need to
      * call this method.  Subclasses of <code>JComponent</code> that support
      * pluggable look and feel should override this method to
      * return a <code>UIDefaults</code> key that maps to the
      * <code>ComponentUI</code> subclass that defines their look and feel.
      *
      * @return the <code>UIDefaults</code> key for a
      *          <code>ComponentUI</code> subclass
      * @see UIDefaults#getUI
      * @beaninfo
      *      expert: true
      * description: UIClassID
      */
     public String getUIClassID() {
         return uiClassID;
     }
 
 
     /**
      * Returns the graphics object used to paint this component.
      * If <code>DebugGraphics</code> is turned on we create a new
      * <code>DebugGraphics</code> object if necessary.
      * Otherwise we just configure the
      * specified graphics object's foreground and font.
      *
      * @param g the original <code>Graphics</code> object
      * @return a <code>Graphics</code> object configured for this component
      */
     protected Graphics getComponentGraphics(Graphics g) {
         Graphics componentGraphics = g;
         if (ui != null && DEBUG_GRAPHICS_LOADED) {
             if ((DebugGraphics.debugComponentCount() != 0) &&
                     (shouldDebugGraphics() != 0) &&
                     !(g instanceof DebugGraphics)) {
                 componentGraphics = new DebugGraphics(g,this);
             }
         }
         componentGraphics.setColor(getForeground());
         componentGraphics.setFont(getFont());
 
         return componentGraphics;
     }
 
 
     /**
      * Calls the UI delegate's paint method, if the UI delegate
      * is non-<code>null</code>.  We pass the delegate a copy of the
      * <code>Graphics</code> object to protect the rest of the
      * paint code from irrevocable changes
      * (for example, <code>Graphics.translate</code>).
      * <p>
      * If you override this in a subclass you should not make permanent
      * changes to the passed in <code>Graphics</code>. For example, you
      * should not alter the clip <code>Rectangle</code> or modify the
      * transform. If you need to do these operations you may find it
      * easier to create a new <code>Graphics</code> from the passed in
      * <code>Graphics</code> and manipulate it. Further, if you do not
      * invoker super's implementation you must honor the opaque property,
      * that is
      * if this component is opaque, you must completely fill in the background
      * in a non-opaque color. If you do not honor the opaque property you
      * will likely see visual artifacts.
      * <p>
      * The passed in <code>Graphics</code> object might
      * have a transform other than the identify transform
      * installed on it.  In this case, you might get
      * unexpected results if you cumulatively apply
      * another transform.
      *
      * @param g the <code>Graphics</code> object to protect
      * @see #paint
      * @see ComponentUI
      */
     protected void paintComponent(Graphics g) {
         if (ui != null) {
             Graphics scratchGraphics = (g == null) ? null : g.create();
             try {
                 ui.update(scratchGraphics, this);
             }
             finally {
                 scratchGraphics.dispose();
             }
         }
     }
 
     /**
      * Paints this component's children.
      * If <code>shouldUseBuffer</code> is true,
      * no component ancestor has a buffer and
      * the component children can use a buffer if they have one.
      * Otherwise, one ancestor has a buffer currently in use and children
      * should not use a buffer to paint.
      * @param g  the <code>Graphics</code> context in which to paint
      * @see #paint
      * @see java.awt.Container#paint
      */
     protected void paintChildren(Graphics g) {
         Graphics sg = g;
 
         synchronized(getTreeLock()) {
             int i = getComponentCount() - 1;
             if (i < 0) {
                 return;
             }
             // If we are only to paint to a specific child, determine
             // its index.
             if (paintingChild != null &&
                 (paintingChild instanceof JComponent) &&
                 paintingChild.isOpaque()) {
                 for (; i >= 0; i--) {
                     if (getComponent(i) == paintingChild){
                         break;
                     }
                 }
             }
             Rectangle tmpRect = fetchRectangle();
             boolean checkSiblings = (!isOptimizedDrawingEnabled() &&
                                      checkIfChildObscuredBySibling());
             Rectangle clipBounds = null;
             if (checkSiblings) {
                 clipBounds = sg.getClipBounds();
                 if (clipBounds == null) {
                     clipBounds = new Rectangle(0, 0, getWidth(),
                                                getHeight());
                 }
             }
             boolean printing = getFlag(IS_PRINTING);
             final Window window = SwingUtilities.getWindowAncestor(this);
             final boolean isWindowOpaque = window == null || window.isOpaque();
             for (; i >= 0 ; i--) {
                 Component comp = getComponent(i);
                 if (comp == null) {
                     continue;
                 }
 
                 final boolean isJComponent = comp instanceof JComponent;
 
                 // Enable painting of heavyweights in non-opaque windows.
                 // See 6884960
                 if ((!isWindowOpaque || isJComponent ||
                             isLightweightComponent(comp)) && comp.isVisible())
                 {
                     Rectangle cr;
 
                     cr = comp.getBounds(tmpRect);
 
                     boolean hitClip = g.hitClip(cr.x, cr.y, cr.width,
                                                 cr.height);
 
                     if (hitClip) {
                         if (checkSiblings && i > 0) {
                             int x = cr.x;
                             int y = cr.y;
                             int width = cr.width;
                             int height = cr.height;
                             SwingUtilities.computeIntersection
                                 (clipBounds.x, clipBounds.y,
                                  clipBounds.width, clipBounds.height, cr);
 
                             if(getObscuredState(i, cr.x, cr.y, cr.width,
                                           cr.height) == COMPLETELY_OBSCURED) {
                                 continue;
                             }
                             cr.x = x;
                             cr.y = y;
                             cr.width = width;
                             cr.height = height;
                         }
                         Graphics cg = sg.create(cr.x, cr.y, cr.width,
                                                 cr.height);
                         cg.setColor(comp.getForeground());
                         cg.setFont(comp.getFont());
                         boolean shouldSetFlagBack = false;
                         try {
                             if(isJComponent) {
                                 if(getFlag(ANCESTOR_USING_BUFFER)) {
                                     ((JComponent)comp).setFlag(
                                                  ANCESTOR_USING_BUFFER,true);
                                     shouldSetFlagBack = true;
                                 }
                                 if(getFlag(IS_PAINTING_TILE)) {
                                     ((JComponent)comp).setFlag(
                                                  IS_PAINTING_TILE,true);
                                     shouldSetFlagBack = true;
                                 }
                                 if(!printing) {
                                     comp.paint(cg);
                                 }
                                 else {
                                     if (!getFlag(IS_PRINTING_ALL)) {
                                         comp.print(cg);
                                     }
                                     else {
                                         comp.printAll(cg);
                                     }
                                 }
                             } else {
                                 // The component is either lightweight, or
                                 // heavyweight in a non-opaque window
                                 if (!printing) {
                                     comp.paint(cg);
                                 }
                                 else {
                                     if (!getFlag(IS_PRINTING_ALL)) {
                                         comp.print(cg);
                                     }
                                     else {
                                         comp.printAll(cg);
                                     }
                                 }
                             }
                         } finally {
                             cg.dispose();
                             if(shouldSetFlagBack) {
                                 ((JComponent)comp).setFlag(
                                              ANCESTOR_USING_BUFFER,false);
                                 ((JComponent)comp).setFlag(
                                              IS_PAINTING_TILE,false);
                             }
                         }
                     }
                 }
 
             }
             recycleRectangle(tmpRect);
         }
     }
 
     /**
      * Paints the component's border.
      * <p>
      * If you override this in a subclass you should not make permanent
      * changes to the passed in <code>Graphics</code>. For example, you
      * should not alter the clip <code>Rectangle</code> or modify the
      * transform. If you need to do these operations you may find it
      * easier to create a new <code>Graphics</code> from the passed in
      * <code>Graphics</code> and manipulate it.
      *
      * @param g  the <code>Graphics</code> context in which to paint
      *
      * @see #paint
      * @see #setBorder
      */
     protected void paintBorder(Graphics g) {
         Border border = getBorder();
         if (border != null) {
             border.paintBorder(this, g, 0, 0, getWidth(), getHeight());
         }
     }
 
 
     /**
      * Calls <code>paint</code>.  Doesn't clear the background but see
      * <code>ComponentUI.update</code>, which is called by
      * <code>paintComponent</code>.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #paint
      * @see #paintComponent
      * @see javax.swing.plaf.ComponentUI
      */
     public void update(Graphics g) {
         paint(g);
     }
 
 
     /**
      * Invoked by Swing to draw components.
      * Applications should not invoke <code>paint</code> directly,
      * but should instead use the <code>repaint</code> method to
      * schedule the component for redrawing.
      * <p>
      * This method actually delegates the work of painting to three
      * protected methods: <code>paintComponent</code>,
      * <code>paintBorder</code>,
      * and <code>paintChildren</code>.  They're called in the order
      * listed to ensure that children appear on top of component itself.
      * Generally speaking, the component and its children should not
      * paint in the insets area allocated to the border. Subclasses can
      * just override this method, as always.  A subclass that just
      * wants to specialize the UI (look and feel) delegate's
      * <code>paint</code> method should just override
      * <code>paintComponent</code>.
      *
      * @param g  the <code>Graphics</code> context in which to paint
      * @see #paintComponent
      * @see #paintBorder
      * @see #paintChildren
      * @see #getComponentGraphics
      * @see #repaint
      */
     public void paint(Graphics g) {
         boolean shouldClearPaintFlags = false;
 
         if ((getWidth() <= 0) || (getHeight() <= 0)) {
             return;
         }
 
         Graphics componentGraphics = getComponentGraphics(g);
         Graphics co = componentGraphics.create();
         try {
             RepaintManager repaintManager = RepaintManager.currentManager(this);
             Rectangle clipRect = co.getClipBounds();
             int clipX;
             int clipY;
             int clipW;
             int clipH;
             if (clipRect == null) {
                 clipX = clipY = 0;
                 clipW = getWidth();
                 clipH = getHeight();
             }
             else {
                 clipX = clipRect.x;
                 clipY = clipRect.y;
                 clipW = clipRect.width;
                 clipH = clipRect.height;
             }
 
             if(clipW > getWidth()) {
                 clipW = getWidth();
             }
             if(clipH > getHeight()) {
                 clipH = getHeight();
             }
 
             if(getParent() != null && !(getParent() instanceof JComponent)) {
                 adjustPaintFlags();
                 shouldClearPaintFlags = true;
             }
 
             int bw,bh;
             boolean printing = getFlag(IS_PRINTING);
             if (!printing && repaintManager.isDoubleBufferingEnabled() &&
                 !getFlag(ANCESTOR_USING_BUFFER) && isDoubleBuffered() &&
                 (getFlag(IS_REPAINTING) || repaintManager.isPainting()))
             {
                 repaintManager.beginPaint();
                 try {
                     repaintManager.paint(this, this, co, clipX, clipY, clipW,
                                          clipH);
                 } finally {
                     repaintManager.endPaint();
                 }
             }
             else {
                 // Will ocassionaly happen in 1.2, especially when printing.
                 if (clipRect == null) {
                     co.setClip(clipX, clipY, clipW, clipH);
                 }
 
                 if (!rectangleIsObscured(clipX,clipY,clipW,clipH)) {
                     if (!printing) {
                         paintComponent(co);
                         paintBorder(co);
                     }
                     else {
                         printComponent(co);
                         printBorder(co);
                     }
                 }
                 if (!printing) {
                     paintChildren(co);
                 }
                 else {
                     printChildren(co);
                 }
             }
         } finally {
             co.dispose();
             if(shouldClearPaintFlags) {
                 setFlag(ANCESTOR_USING_BUFFER,false);
                 setFlag(IS_PAINTING_TILE,false);
                 setFlag(IS_PRINTING,false);
                 setFlag(IS_PRINTING_ALL,false);
             }
         }
     }
 
     // paint forcing use of the double buffer.  This is used for historical
     // reasons: JViewport, when scrolling, previously directly invoked paint
     // while turning off double buffering at the RepaintManager level, this
     // codes simulates that.
     void paintForceDoubleBuffered(Graphics g) {
         RepaintManager rm = RepaintManager.currentManager(this);
         Rectangle clip = g.getClipBounds();
         rm.beginPaint();
         setFlag(IS_REPAINTING, true);
         try {
             rm.paint(this, this, g, clip.x, clip.y, clip.width, clip.height);
         } finally {
             rm.endPaint();
             setFlag(IS_REPAINTING, false);
         }
     }
 
     /**
      * Returns true if this component, or any of its ancestors, are in
      * the processing of painting.
      */
     boolean isPainting() {
         Container component = this;
         while (component != null) {
             if (component instanceof JComponent &&
                    ((JComponent)component).getFlag(ANCESTOR_USING_BUFFER)) {
                 return true;
             }
             component = component.getParent();
         }
         return false;
     }
 
     private void adjustPaintFlags() {
         JComponent jparent;
         Container parent;
         for(parent = getParent() ; parent != null ; parent =
             parent.getParent()) {
             if(parent instanceof JComponent) {
                 jparent = (JComponent) parent;
                 if(jparent.getFlag(ANCESTOR_USING_BUFFER))
                   setFlag(ANCESTOR_USING_BUFFER, true);
                 if(jparent.getFlag(IS_PAINTING_TILE))
                   setFlag(IS_PAINTING_TILE, true);
                 if(jparent.getFlag(IS_PRINTING))
                   setFlag(IS_PRINTING, true);
                 if(jparent.getFlag(IS_PRINTING_ALL))
                   setFlag(IS_PRINTING_ALL, true);
                 break;
             }
         }
     }
 
     /**
      * Invoke this method to print the component. This method invokes
      * <code>print</code> on the component.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #print
      * @see #printComponent
      * @see #printBorder
      * @see #printChildren
      */
     public void printAll(Graphics g) {
         setFlag(IS_PRINTING_ALL, true);
         try {
             print(g);
         }
         finally {
             setFlag(IS_PRINTING_ALL, false);
         }
     }
 
     /**
      * Invoke this method to print the component to the specified
      * <code>Graphics</code>. This method will result in invocations
      * of <code>printComponent</code>, <code>printBorder</code> and
      * <code>printChildren</code>. It is recommended that you override
      * one of the previously mentioned methods rather than this one if
      * your intention is to customize the way printing looks. However,
      * it can be useful to override this method should you want to prepare
      * state before invoking the superclass behavior. As an example,
      * if you wanted to change the component's background color before
      * printing, you could do the following:
      * <pre>
      *     public void print(Graphics g) {
      *         Color orig = getBackground();
      *         setBackground(Color.WHITE);
      *
      *         // wrap in try/finally so that we always restore the state
      *         try {
      *             super.print(g);
      *         } finally {
      *             setBackground(orig);
      *         }
      *     }
      * </pre>
      * <p>
      * Alternatively, or for components that delegate painting to other objects,
      * you can query during painting whether or not the component is in the
      * midst of a print operation. The <code>isPaintingForPrint</code> method provides
      * this ability and its return value will be changed by this method: to
      * <code>true</code> immediately before rendering and to <code>false</code>
      * immediately after. With each change a property change event is fired on
      * this component with the name <code>"paintingForPrint"</code>.
      * <p>
      * This method sets the component's state such that the double buffer
      * will not be used: painting will be done directly on the passed in
      * <code>Graphics</code>.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #printComponent
      * @see #printBorder
      * @see #printChildren
      * @see #isPaintingForPrint
      */
     public void print(Graphics g) {
         setFlag(IS_PRINTING, true);
         firePropertyChange("paintingForPrint", false, true);
         try {
             paint(g);
         }
         finally {
             setFlag(IS_PRINTING, false);
             firePropertyChange("paintingForPrint", true, false);
         }
     }
 
     /**
      * This is invoked during a printing operation. This is implemented to
      * invoke <code>paintComponent</code> on the component. Override this
      * if you wish to add special painting behavior when printing.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #print
      * @since 1.3
      */
     protected void printComponent(Graphics g) {
         paintComponent(g);
     }
 
     /**
      * Prints this component's children. This is implemented to invoke
      * <code>paintChildren</code> on the component. Override this if you
      * wish to print the children differently than painting.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #print
      * @since 1.3
      */
     protected void printChildren(Graphics g) {
         paintChildren(g);
     }
 
     /**
      * Prints the component's border. This is implemented to invoke
      * <code>paintBorder</code> on the component. Override this if you
      * wish to print the border differently that it is painted.
      *
      * @param g the <code>Graphics</code> context in which to paint
      * @see #print
      * @since 1.3
      */
     protected void printBorder(Graphics g) {
         paintBorder(g);
     }
 
     /**
      *  Returns true if the component is currently painting a tile.
      *  If this method returns true, paint will be called again for another
      *  tile. This method returns false if you are not painting a tile or
      *  if the last tile is painted.
      *  Use this method to keep some state you might need between tiles.
      *
      *  @return  true if the component is currently painting a tile,
      *          false otherwise
      */
     public boolean isPaintingTile() {
         return getFlag(IS_PAINTING_TILE);
     }
 
     /**
      * Returns <code>true</code> if the current painting operation on this
      * component is part of a <code>print</code> operation. This method is
      * useful when you want to customize what you print versus what you show
      * on the screen.
      * <p>
      * You can detect changes in the value of this property by listening for
      * property change events on this component with name
      * <code>"paintingForPrint"</code>.
      * <p>
      * Note: This method provides complimentary functionality to that provided
      * by other high level Swing printing APIs. However, it deals strictly with
      * painting and should not be confused as providing information on higher
      * level print processes. For example, a {@link javax.swing.JTable#print()}
      * operation doesn't necessarily result in a continuous rendering of the
      * full component, and the return value of this method can change multiple
      * times during that operation. It is even possible for the component to be
      * painted to the screen while the printing process is ongoing. In such a
      * case, the return value of this method is <code>true</code> when, and only
      * when, the table is being painted as part of the printing process.
      *
      * @return true if the current painting operation on this component
      *         is part of a print operation
      * @see #print
      * @since 1.6
      */
     public final boolean isPaintingForPrint() {
         return getFlag(IS_PRINTING);
     }
 
     /**
      * In release 1.4, the focus subsystem was rearchitected.
      * For more information, 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>.
      * <p>
      * Changes this <code>JComponent</code>'s focus traversal keys to
      * CTRL+TAB and CTRL+SHIFT+TAB. Also prevents
      * <code>SortingFocusTraversalPolicy</code> from considering descendants
      * of this JComponent when computing a focus traversal cycle.
      *
      * @see java.awt.Component#setFocusTraversalKeys
      * @see SortingFocusTraversalPolicy
      * @deprecated As of 1.4, replaced by
      *   <code>Component.setFocusTraversalKeys(int, Set)</code> and
      *   <code>Container.setFocusCycleRoot(boolean)</code>.
      */
     @Deprecated
     public boolean isManagingFocus() {
         return false;
     }
 
     private void registerNextFocusableComponent() {
         registerNextFocusableComponent(getNextFocusableComponent());
     }
 
     private void registerNextFocusableComponent(Component
                                                 nextFocusableComponent) {
         if (nextFocusableComponent == null) {
             return;
         }
 
         Container nearestRoot =
             (isFocusCycleRoot()) ? this : getFocusCycleRootAncestor();
         FocusTraversalPolicy policy = nearestRoot.getFocusTraversalPolicy();
         if (!(policy instanceof LegacyGlueFocusTraversalPolicy)) {
             policy = new LegacyGlueFocusTraversalPolicy(policy);
             nearestRoot.setFocusTraversalPolicy(policy);
         }
         ((LegacyGlueFocusTraversalPolicy)policy).
             setNextFocusableComponent(this, nextFocusableComponent);
     }
 
     private void deregisterNextFocusableComponent() {
         Component nextFocusableComponent = getNextFocusableComponent();
         if (nextFocusableComponent == null) {
             return;
         }
 
         Container nearestRoot =
             (isFocusCycleRoot()) ? this : getFocusCycleRootAncestor();
         if (nearestRoot == null) {
             return;
         }
         FocusTraversalPolicy policy = nearestRoot.getFocusTraversalPolicy();
         if (policy instanceof LegacyGlueFocusTraversalPolicy) {
             ((LegacyGlueFocusTraversalPolicy)policy).
                 unsetNextFocusableComponent(this, nextFocusableComponent);
         }
     }
 
     /**
      * In release 1.4, the focus subsystem was rearchitected.
      * For more information, 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>.
      * <p>
      * Overrides the default <code>FocusTraversalPolicy</code> for this
      * <code>JComponent</code>'s focus traversal cycle by unconditionally
      * setting the specified <code>Component</code> as the next
      * <code>Component</code> in the cycle, and this <code>JComponent</code>
      * as the specified <code>Component</code>'s previous
      * <code>Component</code> in the cycle.
      *
      * @param aComponent the <code>Component</code> that should follow this
      *        <code>JComponent</code> in the focus traversal cycle
      *
      * @see #getNextFocusableComponent
      * @see java.awt.FocusTraversalPolicy
      * @deprecated As of 1.4, replaced by <code>FocusTraversalPolicy</code>
      */
     @Deprecated
     public void setNextFocusableComponent(Component aComponent) {
         boolean displayable = isDisplayable();
         if (displayable) {
             deregisterNextFocusableComponent();
         }
         putClientProperty(NEXT_FOCUS, aComponent);
         if (displayable) {
             registerNextFocusableComponent(aComponent);
         }
     }
 
     /**
      * In release 1.4, the focus subsystem was rearchitected.
      * For more information, 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>.
      * <p>
      * Returns the <code>Component</code> set by a prior call to
      * <code>setNextFocusableComponent(Component)</code> on this
      * <code>JComponent</code>.
      *
      * @return the <code>Component</code> that will follow this
      *        <code>JComponent</code> in the focus traversal cycle, or
      *        <code>null</code> if none has been explicitly specified
      *
      * @see #setNextFocusableComponent
      * @deprecated As of 1.4, replaced by <code>FocusTraversalPolicy</code>.
      */
     @Deprecated
     public Component getNextFocusableComponent() {
         return (Component)getClientProperty(NEXT_FOCUS);
     }
 
     /**
      * Provides a hint as to whether or not this <code>JComponent</code>
      * should get focus. This is only a hint, and it is up to consumers that
      * are requesting focus to honor this property. This is typically honored
      * for mouse operations, but not keyboard operations. For example, look
      * and feels could verify this property is true before requesting focus
      * during a mouse operation. This would often times be used if you did
      * not want a mouse press on a <code>JComponent</code> to steal focus,
      * but did want the <code>JComponent</code> to be traversable via the
      * keyboard. If you do not want this <code>JComponent</code> focusable at
      * all, use the <code>setFocusable</code> method instead.
      * <p>
      * Please 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>,
      * for more information.
      *
      * @param requestFocusEnabled indicates whether you want this
      *        <code>JComponent</code> to be focusable or not
      * @see <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
      * @see java.awt.Component#setFocusable
      */
     public void setRequestFocusEnabled(boolean requestFocusEnabled) {
         setFlag(REQUEST_FOCUS_DISABLED, !requestFocusEnabled);
     }
 
     /**
      * Returns <code>true</code> if this <code>JComponent</code> should
      * get focus; otherwise returns <code>false</code>.
      * <p>
      * Please 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>,
      * for more information.
      *
      * @return <code>true</code> if this component should get focus,
      *     otherwise returns <code>false</code>
      * @see #setRequestFocusEnabled
      * @see <a href="../../java/awt/doc-files/FocusSpec.html">Focus
      *      Specification</a>
      * @see java.awt.Component#isFocusable
      */
     public boolean isRequestFocusEnabled() {
         return !getFlag(REQUEST_FOCUS_DISABLED);
     }
 
     /**
      * Requests that this <code>Component</code> gets the input focus.
      * Refer to {@link java.awt.Component#requestFocus()
      * Component.requestFocus()} for a complete description of
      * this method.
      * <p>
      * Note that the use of this method is discouraged because
      * its behavior is platform dependent. Instead we recommend the
      * use of {@link #requestFocusInWindow() requestFocusInWindow()}.
      * If you would like more information on focus, 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>.
      *
      * @see java.awt.Component#requestFocusInWindow()
      * @see java.awt.Component#requestFocusInWindow(boolean)
      * @since 1.4
      */
     public void requestFocus() {
         super.requestFocus();
     }
 
     /**
      * Requests that this <code>Component</code> gets the input focus.
      * Refer to {@link java.awt.Component#requestFocus(boolean)
      * Component.requestFocus(boolean)} for a complete description of
      * this method.
      * <p>
      * Note that the use of this method is discouraged because
      * its behavior is platform dependent. Instead we recommend the
      * use of {@link #requestFocusInWindow(boolean)
      * requestFocusInWindow(boolean)}.
      * If you would like more information on focus, 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>.
      *
      * @param temporary boolean indicating if the focus change is temporary
      * @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.Component#requestFocusInWindow()
      * @see java.awt.Component#requestFocusInWindow(boolean)
      * @since 1.4
      */
     public boolean requestFocus(boolean temporary) {
         return super.requestFocus(temporary);
     }
 
     /**
      * Requests that this <code>Component</code> gets the input focus.
      * Refer to {@link java.awt.Component#requestFocusInWindow()
      * Component.requestFocusInWindow()} for a complete description of
      * this method.
      * <p>
      * If you would like more information on focus, 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>.
      *
      * @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.Component#requestFocusInWindow()
      * @see java.awt.Component#requestFocusInWindow(boolean)
      * @since 1.4
      */
     public boolean requestFocusInWindow() {
         return super.requestFocusInWindow();
     }
 
     /**
      * Requests that this <code>Component</code> gets the input focus.
      * Refer to {@link java.awt.Component#requestFocusInWindow(boolean)
      * Component.requestFocusInWindow(boolean)} for a complete description of
      * this method.
      * <p>
      * If you would like more information on focus, 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>.
      *
      * @param temporary boolean indicating if the focus change is temporary
      * @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.Component#requestFocusInWindow()
      * @see java.awt.Component#requestFocusInWindow(boolean)
      * @since 1.4
      */
     protected boolean requestFocusInWindow(boolean temporary) {
         return super.requestFocusInWindow(temporary);
     }
 
     /**
      * 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, visible, and focusable for the request to be
      * granted.
      * <p>
      * This method is intended for use by focus implementations. Client code
      * should not use this method; instead, it should use
      * <code>requestFocusInWindow()</code>.
      *
      * @see #requestFocusInWindow()
      */
     public void grabFocus() {
         requestFocus();
     }
 
     /**
      * Sets the value to indicate whether input verifier for the
      * current focus owner will be called before this component requests
      * focus. The default is true. Set to false on components such as a
      * Cancel button or a scrollbar, which should activate even if the
      * input in the current focus owner is not "passed" by the input
      * verifier for that component.
      *
      * @param verifyInputWhenFocusTarget value for the
      *        <code>verifyInputWhenFocusTarget</code> property
      * @see InputVerifier
      * @see #setInputVerifier
      * @see #getInputVerifier
      * @see #getVerifyInputWhenFocusTarget
      *
      * @since 1.3
      * @beaninfo
      *       bound: true
      * description: Whether the Component verifies input before accepting
      *              focus.
      */
     public void setVerifyInputWhenFocusTarget(boolean
                                               verifyInputWhenFocusTarget) {
         boolean oldVerifyInputWhenFocusTarget =
             this.verifyInputWhenFocusTarget;
         this.verifyInputWhenFocusTarget = verifyInputWhenFocusTarget;
         firePropertyChange("verifyInputWhenFocusTarget",
                            oldVerifyInputWhenFocusTarget,
                            verifyInputWhenFocusTarget);
     }
 
     /**
      * Returns the value that indicates whether the input verifier for the
      * current focus owner will be called before this component requests
      * focus.
      *
      * @return value of the <code>verifyInputWhenFocusTarget</code> property
      *
      * @see InputVerifier
      * @see #setInputVerifier
      * @see #getInputVerifier
      * @see #setVerifyInputWhenFocusTarget
      *
      * @since 1.3
      */
     public boolean getVerifyInputWhenFocusTarget() {
         return verifyInputWhenFocusTarget;
     }
 
 
     /**
      * Gets the <code>FontMetrics</code> for the specified <code>Font</code>.
      *
      * @param font the font for which font metrics is to be
      *          obtained
      * @return the font metrics for <code>font</code>
      * @throws NullPointerException if <code>font</code> is null
      * @since 1.5
      */
     public FontMetrics getFontMetrics(Font font) {
         return SwingUtilities2.getFontMetrics(this, font);
     }
 
 
     /**
      * Sets the preferred size of this component.
      * If <code>preferredSize</code> is <code>null</code>, the UI will
      * be asked for the preferred size.
      * @beaninfo
      *   preferred: true
      *       bound: true
      * description: The preferred size of the component.
      */
     public void setPreferredSize(Dimension preferredSize) {
         super.setPreferredSize(preferredSize);
     }
 
 
     /**
      * If the <code>preferredSize</code> has been set to a
      * non-<code>null</code> value just returns it.
      * If the UI delegate's <code>getPreferredSize</code>
      * method returns a non <code>null</code> value then return that;
      * otherwise defer to the component's layout manager.
      *
      * @return the value of the <code>preferredSize</code> property
      * @see #setPreferredSize
      * @see ComponentUI
      */
     @Transient
     public Dimension getPreferredSize() {
         if (isPreferredSizeSet()) {
             return super.getPreferredSize();
         }
         Dimension size = null;
         if (ui != null) {
             size = ui.getPreferredSize(this);
         }
         return (size != null) ? size : super.getPreferredSize();
     }
 
 
     /**
      * Sets the maximum size of this component to a constant
      * value.  Subsequent calls to <code>getMaximumSize</code> will always
      * return this value; the component's UI will not be asked
      * to compute it.  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
      * @beaninfo
      *       bound: true
      * description: The maximum size of the component.
      */
     public void setMaximumSize(Dimension maximumSize) {
         super.setMaximumSize(maximumSize);
     }
 
 
     /**
      * If the maximum size has been set to a non-<code>null</code> value
      * just returns it.  If the UI delegate's <code>getMaximumSize</code>
      * method returns a non-<code>null</code> value then return that;
      * otherwise defer to the component's layout manager.
      *
      * @return the value of the <code>maximumSize</code> property
      * @see #setMaximumSize
      * @see ComponentUI
      */
     @Transient
     public Dimension getMaximumSize() {
         if (isMaximumSizeSet()) {
             return super.getMaximumSize();
         }
         Dimension size = null;
         if (ui != null) {
             size = ui.getMaximumSize(this);
         }
         return (size != null) ? size : super.getMaximumSize();
     }
 
 
     /**
      * Sets the minimum size of this component to a constant
      * value.  Subsequent calls to <code>getMinimumSize</code> will always
      * return this value; the component's UI will not be asked
      * to compute it.  Setting the minimum size to <code>null</code>
      * restores the default behavior.
      *
      * @param minimumSize the new minimum size of this component
      * @see #getMinimumSize
      * @beaninfo
      *       bound: true
      * description: The minimum size of the component.
      */
     public void setMinimumSize(Dimension minimumSize) {
         super.setMinimumSize(minimumSize);
     }
 
     /**
      * If the minimum size has been set to a non-<code>null</code> value
      * just returns it.  If the UI delegate's <code>getMinimumSize</code>
      * method returns a non-<code>null</code> value then return that; otherwise
      * defer to the component's layout manager.
      *
      * @return the value of the <code>minimumSize</code> property
      * @see #setMinimumSize
      * @see ComponentUI
      */
     @Transient
     public Dimension getMinimumSize() {
         if (isMinimumSizeSet()) {
             return super.getMinimumSize();
         }
         Dimension size = null;
         if (ui != null) {
             size = ui.getMinimumSize(this);
         }
         return (size != null) ? size : super.getMinimumSize();
     }
 
     /**
      * Gives the UI delegate an opportunity to define the precise
      * shape of this component for the sake of mouse processing.
      *
      * @return true if this component logically contains x,y
      * @see java.awt.Component#contains(int, int)
      * @see ComponentUI
      */
     public boolean contains(int x, int y) {
         return (ui != null) ? ui.contains(this, x, y) : super.contains(x, y);
     }
 
     /**
      * Sets the border of this component.  The <code>Border</code> object is
      * responsible for defining the insets for the component
      * (overriding any insets set directly on the component) and
      * for optionally rendering any border decorations within the
      * bounds of those insets.  Borders should be used (rather
      * than insets) for creating both decorative and non-decorative
      * (such as margins and padding) regions for a swing component.
      * Compound borders can be used to nest multiple borders within a
      * single component.
      * <p>
      * Although technically you can set the border on any object
      * that inherits from <code>JComponent</code>, the look and
      * feel implementation of many standard Swing components
      * doesn't work well with user-set borders.  In general,
      * when you want to set a border on a standard Swing
      * component other than <code>JPanel</code> or <code>JLabel</code>,
      * we recommend that you put the component in a <code>JPanel</code>
      * and set the border on the <code>JPanel</code>.
      * <p>
      * This is a bound property.
      *
      * @param border the border to be rendered for this component
      * @see Border
      * @see CompoundBorder
      * @beaninfo
      *        bound: true
      *    preferred: true
      *    attribute: visualUpdate true
      *  description: The component's border.
      */
     public void setBorder(Border border) {
         Border         oldBorder = this.border;
 
         this.border = border;
         firePropertyChange("border", oldBorder, border);
         if (border != oldBorder) {
             if (border == null || oldBorder == null ||
                 !(border.getBorderInsets(this).equals(oldBorder.getBorderInsets(this)))) {
                 revalidate();
             }
             repaint();
         }
     }
 
     /**
      * Returns the border of this component or <code>null</code> if no
      * border is currently set.
      *
      * @return the border object for this component
      * @see #setBorder
      */
     public Border getBorder() {
         return border;
     }
 
     /**
      * If a border has been set on this component, returns the
      * border's insets; otherwise calls <code>super.getInsets</code>.
      *
      * @return the value of the insets property
      * @see #setBorder
      */
     public Insets getInsets() {
         if (border != null) {
             return border.getBorderInsets(this);
         }
         return super.getInsets();
     }
 
     /**
      * Returns an <code>Insets</code> object containing this component's inset
      * values.  The passed-in <code>Insets</code> object will be reused
      * if possible.
      * Calling methods cannot assume that the same object will be returned,
      * however.  All existing values within this object are overwritten.
      * If <code>insets</code> is null, this will allocate a new one.
      *
      * @param insets the <code>Insets</code> object, which can be reused
      * @return the <code>Insets</code> object
      * @see #getInsets
      * @beaninfo
      *   expert: true
      */
     public Insets getInsets(Insets insets) {
         if (insets == null) {
             insets = new Insets(0, 0, 0, 0);
         }
         if (border != null) {
             if (border instanceof AbstractBorder) {
                 return ((AbstractBorder)border).getBorderInsets(this, insets);
             } else {
                 // Can't reuse border insets because the Border interface
                 // can't be enhanced.
                 return border.getBorderInsets(this);
             }
         } else {
             // super.getInsets() always returns an Insets object with
             // all of its value zeroed.  No need for a new object here.
             insets.left = insets.top = insets.right = insets.bottom = 0;
             return insets;
         }
     }
 
     /**
      * Overrides <code>Container.getAlignmentY</code> to return
      * the horizontal alignment.
      *
      * @return the value of the <code>alignmentY</code> property
      * @see #setAlignmentY
      * @see java.awt.Component#getAlignmentY
      */
     public float getAlignmentY() {
         if (isAlignmentYSet) {
             return alignmentY;
         }
         return super.getAlignmentY();
     }
 
     /**
      * Sets the the horizontal alignment.
      *
      * @param alignmentY  the new horizontal alignment
      * @see #getAlignmentY
      * @beaninfo
      *   description: The preferred vertical alignment of the component.
      */
     public void setAlignmentY(float alignmentY) {
         this.alignmentY = alignmentY > 1.0f ? 1.0f : alignmentY < 0.0f ? 0.0f : alignmentY;
         isAlignmentYSet = true;
     }
 
 
     /**
      * Overrides <code>Container.getAlignmentX</code> to return
      * the vertical alignment.
      *
      * @return the value of the <code>alignmentX</code> property
      * @see #setAlignmentX
      * @see java.awt.Component#getAlignmentX
      */
     public float getAlignmentX() {
         if (isAlignmentXSet) {
             return alignmentX;
         }
         return super.getAlignmentX();
     }
 
     /**
      * Sets the the vertical alignment.
      *
      * @param alignmentX  the new vertical alignment
      * @see #getAlignmentX
      * @beaninfo
      *   description: The preferred horizontal alignment of the component.
      */
     public void setAlignmentX(float alignmentX) {
         this.alignmentX = alignmentX > 1.0f ? 1.0f : alignmentX < 0.0f ? 0.0f : alignmentX;
         isAlignmentXSet = true;
     }
 
     /**
      * Sets the input verifier for this component.
      *
      * @param inputVerifier the new input verifier
      * @since 1.3
      * @see InputVerifier
      * @beaninfo
      *       bound: true
      * description: The component's input verifier.
      */
     public void setInputVerifier(InputVerifier inputVerifier) {
         InputVerifier oldInputVerifier = (InputVerifier)getClientProperty(
                                          JComponent_INPUT_VERIFIER);
         putClientProperty(JComponent_INPUT_VERIFIER, inputVerifier);
         firePropertyChange("inputVerifier", oldInputVerifier, inputVerifier);
     }
 
     /**
      * Returns the input verifier for this component.
      *
      * @return the <code>inputVerifier</code> property
      * @since 1.3
      * @see InputVerifier
      */
     public InputVerifier getInputVerifier() {
         return (InputVerifier)getClientProperty(JComponent_INPUT_VERIFIER);
     }
 
     /**
      * Returns this component's graphics context, which lets you draw
      * on a component. Use this method to get a <code>Graphics</code> object and
      * then invoke operations on that object to draw on the component.
      * @return this components graphics context
      */
     public Graphics getGraphics() {
         if (DEBUG_GRAPHICS_LOADED && shouldDebugGraphics() != 0) {
             DebugGraphics graphics = new DebugGraphics(super.getGraphics(),
                                                        this);
             return graphics;
         }
         return super.getGraphics();
     }
 
 
     /** Enables or disables diagnostic information about every graphics
       * operation performed within the component or one of its children.
       *
       * @param debugOptions  determines how the component should display
       *         the information;  one of the following options:
       * <ul>
       * <li>DebugGraphics.LOG_OPTION - causes a text message to be printed.
       * <li>DebugGraphics.FLASH_OPTION - causes the drawing to flash several
       * times.
       * <li>DebugGraphics.BUFFERED_OPTION - creates an
       *         <code>ExternalWindow</code> that displays the operations
       *         performed on the View's offscreen buffer.
       * <li>DebugGraphics.NONE_OPTION disables debugging.
       * <li>A value of 0 causes no changes to the debugging options.
       * </ul>
       * <code>debugOptions</code> is bitwise OR'd into the current value
       *
       * @beaninfo
       *   preferred: true
       *        enum: NONE_OPTION DebugGraphics.NONE_OPTION
       *              LOG_OPTION DebugGraphics.LOG_OPTION
       *              FLASH_OPTION DebugGraphics.FLASH_OPTION
       *              BUFFERED_OPTION DebugGraphics.BUFFERED_OPTION
       * description: Diagnostic options for graphics operations.
       */
     public void setDebugGraphicsOptions(int debugOptions) {
         DebugGraphics.setDebugOptions(this, debugOptions);
     }
 
     /** Returns the state of graphics debugging.
       *
       * @return a bitwise OR'd flag of zero or more of the following options:
       * <ul>
       * <li>DebugGraphics.LOG_OPTION - causes a text message to be printed.
       * <li>DebugGraphics.FLASH_OPTION - causes the drawing to flash several
       * times.
       * <li>DebugGraphics.BUFFERED_OPTION - creates an
       *         <code>ExternalWindow</code> that displays the operations
       *         performed on the View's offscreen buffer.
       * <li>DebugGraphics.NONE_OPTION disables debugging.
       * <li>A value of 0 causes no changes to the debugging options.
       * </ul>
       * @see #setDebugGraphicsOptions
       */
     public int getDebugGraphicsOptions() {
         return DebugGraphics.getDebugOptions(this);
     }
 
 
     /**
      * Returns true if debug information is enabled for this
      * <code>JComponent</code> or one of its parents.
      */
     int shouldDebugGraphics() {
         return DebugGraphics.shouldComponentDebug(this);
     }
 
     /**
      * This method is now obsolete, please use a combination of
      * <code>getActionMap()</code> and <code>getInputMap()</code> for
      * similiar behavior. For example, to bind the <code>KeyStroke</code>
      * <code>aKeyStroke</code> to the <code>Action</code> <code>anAction</code>
      * now use:
      * <pre>
      *   component.getInputMap().put(aKeyStroke, aCommand);
      *   component.getActionMap().put(aCommmand, anAction);
      * </pre>
      * The above assumes you want the binding to be applicable for
      * <code>WHEN_FOCUSED</code>. To register bindings for other focus
      * states use the <code>getInputMap</code> method that takes an integer.
      * <p>
      * Register a new keyboard action.
      * <code>anAction</code> will be invoked if a key event matching
      * <code>aKeyStroke</code> occurs and <code>aCondition</code> is verified.
      * The <code>KeyStroke</code> object defines a
      * particular combination of a keyboard key and one or more modifiers
      * (alt, shift, ctrl, meta).
      * <p>
      * The <code>aCommand</code> will be set in the delivered event if
      * specified.
      * <p>
      * The <code>aCondition</code> can be one of:
      * <blockquote>
      * <DL>
      * <DT>WHEN_FOCUSED
      * <DD>The action will be invoked only when the keystroke occurs
      *     while the component has the focus.
      * <DT>WHEN_IN_FOCUSED_WINDOW
      * <DD>The action will be invoked when the keystroke occurs while
      *     the component has the focus or if the component is in the
      *     window that has the focus. Note that the component need not
      *     be an immediate descendent of the window -- it can be
      *     anywhere in the window's containment hierarchy. In other
      *     words, whenever <em>any</em> component in the window has the focus,
      *     the action registered with this component is invoked.
      * <DT>WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
      * <DD>The action will be invoked when the keystroke occurs while the
      *     component has the focus or if the component is an ancestor of
      *     the component that has the focus.
      * </DL>
      * </blockquote>
      * <p>
      * The combination of keystrokes and conditions lets you define high
      * level (semantic) action events for a specified keystroke+modifier
      * combination (using the KeyStroke class) and direct to a parent or
      * child of a component that has the focus, or to the component itself.
      * In other words, in any hierarchical structure of components, an
      * arbitrary key-combination can be immediately directed to the
      * appropriate component in the hierarchy, and cause a specific method
      * to be invoked (usually by way of adapter objects).
      * <p>
      * If an action has already been registered for the receiving
      * container, with the same charCode and the same modifiers,
      * <code>anAction</code> will replace the action.
      *
      * @param anAction  the <code>Action</code> to be registered
      * @param aCommand  the command to be set in the delivered event
      * @param aKeyStroke the <code>KeyStroke</code> to bind to the action
      * @param aCondition the condition that needs to be met, see above
      * @see KeyStroke
      */
     public void registerKeyboardAction(ActionListener anAction,String aCommand,KeyStroke aKeyStroke,int aCondition) {
 
         InputMap inputMap = getInputMap(aCondition, true);
 
         if (inputMap != null) {
             ActionMap actionMap = getActionMap(true);
             ActionStandin action = new ActionStandin(anAction, aCommand);
             inputMap.put(aKeyStroke, action);
             if (actionMap != null) {
                 actionMap.put(action, action);
             }
         }
     }
 
     /**
      * Registers any bound <code>WHEN_IN_FOCUSED_WINDOW</code> actions with
      * the <code>KeyboardManager</code>. If <code>onlyIfNew</code>
      * is true only actions that haven't been registered are pushed
      * to the <code>KeyboardManager</code>;
      * otherwise all actions are pushed to the <code>KeyboardManager</code>.
      *
      * @param onlyIfNew  if true, only actions that haven't been registered
      *          are pushed to the <code>KeyboardManager</code>
      */
     private void registerWithKeyboardManager(boolean onlyIfNew) {
         InputMap inputMap = getInputMap(WHEN_IN_FOCUSED_WINDOW, false);
         KeyStroke[] strokes;
         Hashtable<KeyStroke, KeyStroke> registered = (Hashtable)getClientProperty
                                 (WHEN_IN_FOCUSED_WINDOW_BINDINGS);
 
         if (inputMap != null) {
             // Push any new KeyStrokes to the KeyboardManager.
             strokes = inputMap.allKeys();
             if (strokes != null) {
                 for (int counter = strokes.length - 1; counter >= 0;
                      counter--) {
                     if (!onlyIfNew || registered == null ||
                         registered.get(strokes[counter]) == null) {
                         registerWithKeyboardManager(strokes[counter]);
                     }
                     if (registered != null) {
                         registered.remove(strokes[counter]);
                     }
                 }
             }
         }
         else {
             strokes = null;
         }
         // Remove any old ones.
         if (registered != null && registered.size() > 0) {
             Enumeration<KeyStroke> keys = registered.keys();
 
             while (keys.hasMoreElements()) {
                 KeyStroke ks = keys.nextElement();
                 unregisterWithKeyboardManager(ks);
             }
             registered.clear();
         }
         // Updated the registered Hashtable.
         if (strokes != null && strokes.length > 0) {
             if (registered == null) {
                 registered = new Hashtable<KeyStroke, KeyStroke>(strokes.length);
                 putClientProperty(WHEN_IN_FOCUSED_WINDOW_BINDINGS, registered);
             }
             for (int counter = strokes.length - 1; counter >= 0; counter--) {
                 registered.put(strokes[counter], strokes[counter]);
             }
         }
         else {
             putClientProperty(WHEN_IN_FOCUSED_WINDOW_BINDINGS, null);
         }
     }
 
     /**
      * Unregisters all the previously registered
      * <code>WHEN_IN_FOCUSED_WINDOW</code> <code>KeyStroke</code> bindings.
      */
     private void unregisterWithKeyboardManager() {
         Hashtable registered = (Hashtable)getClientProperty
                                 (WHEN_IN_FOCUSED_WINDOW_BINDINGS);
 
         if (registered != null && registered.size() > 0) {
             Enumeration keys = registered.keys();
 
             while (keys.hasMoreElements()) {
                 KeyStroke ks = (KeyStroke)keys.nextElement();
                 unregisterWithKeyboardManager(ks);
             }
         }
         putClientProperty(WHEN_IN_FOCUSED_WINDOW_BINDINGS, null);
     }
 
     /**
      * Invoked from <code>ComponentInputMap</code> when its bindings change.
      * If <code>inputMap</code> is the current <code>windowInputMap</code>
      * (or a parent of the window <code>InputMap</code>)
      * the <code>KeyboardManager</code> is notified of the new bindings.
      *
      * @param inputMap the map containing the new bindings
      */
     void componentInputMapChanged(ComponentInputMap inputMap) {
         InputMap km = getInputMap(WHEN_IN_FOCUSED_WINDOW, false);
 
         while (km != inputMap && km != null) {
             km = km.getParent();
         }
         if (km != null) {
             registerWithKeyboardManager(false);
         }
     }
 
     private void registerWithKeyboardManager(KeyStroke aKeyStroke) {
         KeyboardManager.getCurrentManager().registerKeyStroke(aKeyStroke,this);
     }
 
     private void unregisterWithKeyboardManager(KeyStroke aKeyStroke) {
         KeyboardManager.getCurrentManager().unregisterKeyStroke(aKeyStroke,
                                                                 this);
     }
 
     /**
      * This method is now obsolete, please use a combination of
      * <code>getActionMap()</code> and <code>getInputMap()</code> for
      * similiar behavior.
      */
     public void registerKeyboardAction(ActionListener anAction,KeyStroke aKeyStroke,int aCondition) {
         registerKeyboardAction(anAction,null,aKeyStroke,aCondition);
     }
 
     /**
      * This method is now obsolete. To unregister an existing binding
      * you can either remove the binding from the
      * <code>ActionMap/InputMap</code>, or place a dummy binding the
      * <code>InputMap</code>. Removing the binding from the
      * <code>InputMap</code> allows bindings in parent <code>InputMap</code>s
      * to be active, whereas putting a dummy binding in the
      * <code>InputMap</code> effectively disables
      * the binding from ever happening.
      * <p>
      * Unregisters a keyboard action.
      * This will remove the binding from the <code>ActionMap</code>
      * (if it exists) as well as the <code>InputMap</code>s.
      */
     public void unregisterKeyboardAction(KeyStroke aKeyStroke) {
         ActionMap am = getActionMap(false);
         for (int counter = 0; counter < 3; counter++) {
             InputMap km = getInputMap(counter, false);
             if (km != null) {
                 Object actionID = km.get(aKeyStroke);
 
                 if (am != null && actionID != null) {
                     am.remove(actionID);
                 }
                 km.remove(aKeyStroke);
             }
         }
     }
 
     /**
      * Returns the <code>KeyStrokes</code> that will initiate
      * registered actions.
      *
      * @return an array of <code>KeyStroke</code> objects
      * @see #registerKeyboardAction
      */
     public KeyStroke[] getRegisteredKeyStrokes() {
         int[] counts = new int[3];
         KeyStroke[][] strokes = new KeyStroke[3][];
 
         for (int counter = 0; counter < 3; counter++) {
             InputMap km = getInputMap(counter, false);
             strokes[counter] = (km != null) ? km.allKeys() : null;
             counts[counter] = (strokes[counter] != null) ?
                                strokes[counter].length : 0;
         }
         KeyStroke[] retValue = new KeyStroke[counts[0] + counts[1] +
                                             counts[2]];
         for (int counter = 0, last = 0; counter < 3; counter++) {
             if (counts[counter] > 0) {
                 System.arraycopy(strokes[counter], 0, retValue, last,
                                  counts[counter]);
                 last += counts[counter];
             }
         }
         return retValue;
     }
 
     /**
      * Returns the condition that determines whether a registered action
      * occurs in response to the specified keystroke.
      * <p>
      * For Java 2 platform v1.3, a <code>KeyStroke</code> can be associated
      * with more than one condition.
      * For example, 'a' could be bound for the two
      * conditions <code>WHEN_FOCUSED</code> and
      * <code>WHEN_IN_FOCUSED_WINDOW</code> condition.
      *
      * @return the action-keystroke condition
      */
     public int getConditionForKeyStroke(KeyStroke aKeyStroke) {
         for (int counter = 0; counter < 3; counter++) {
             InputMap inputMap = getInputMap(counter, false);
             if (inputMap != null && inputMap.get(aKeyStroke) != null) {
                 return counter;
             }
         }
         return UNDEFINED_CONDITION;
     }
 
     /**
      * Returns the object that will perform the action registered for a
      * given keystroke.
      *
      * @return the <code>ActionListener</code>
      *          object invoked when the keystroke occurs
      */
     public ActionListener getActionForKeyStroke(KeyStroke aKeyStroke) {
         ActionMap am = getActionMap(false);
 
         if (am == null) {
             return null;
         }
         for (int counter = 0; counter < 3; counter++) {
             InputMap inputMap = getInputMap(counter, false);
             if (inputMap != null) {
                 Object actionBinding = inputMap.get(aKeyStroke);
 
                 if (actionBinding != null) {
                     Action action = am.get(actionBinding);
                     if (action instanceof ActionStandin) {
                         return ((ActionStandin)action).actionListener;
                     }
                     return action;
                 }
             }
         }
         return null;
     }
 
     /**
      * Unregisters all the bindings in the first tier <code>InputMaps</code>
      * and <code>ActionMap</code>. This has the effect of removing any
      * local bindings, and allowing the bindings defined in parent
      * <code>InputMap/ActionMaps</code>
      * (the UI is usually defined in the second tier) to persist.
      */
     public void resetKeyboardActions() {
         // Keys
         for (int counter = 0; counter < 3; counter++) {
             InputMap inputMap = getInputMap(counter, false);
 
             if (inputMap != null) {
                 inputMap.clear();
             }
         }
 
         // Actions
         ActionMap am = getActionMap(false);
 
         if (am != null) {
             am.clear();
         }
     }
 
     /**
      * Sets the <code>InputMap</code> to use under the condition
      * <code>condition</code> to
      * <code>map</code>. A <code>null</code> value implies you
      * do not want any bindings to be used, even from the UI. This will
      * not reinstall the UI <code>InputMap</code> (if there was one).
      * <code>condition</code> has one of the following values:
      * <ul>
      * <li><code>WHEN_IN_FOCUSED_WINDOW</code>
      * <li><code>WHEN_FOCUSED</code>
      * <li><code>WHEN_ANCESTOR_OF_FOCUSED_COMPONENT</code>
      * </ul>
      * If <code>condition</code> is <code>WHEN_IN_FOCUSED_WINDOW</code>
      * and <code>map</code> is not a <code>ComponentInputMap</code>, an
      * <code>IllegalArgumentException</code> will be thrown.
      * Similarly, if <code>condition</code> is not one of the values
      * listed, an <code>IllegalArgumentException</code> will be thrown.
      *
      * @param condition one of the values listed above
      * @param map  the <code>InputMap</code> to use for the given condition
      * @exception IllegalArgumentException if <code>condition</code> is
      *          <code>WHEN_IN_FOCUSED_WINDOW</code> and <code>map</code>
      *          is not an instance of <code>ComponentInputMap</code>; or
      *          if <code>condition</code> is not one of the legal values
      *          specified above
      * @since 1.3
      */
     public final void setInputMap(int condition, InputMap map) {
         switch (condition) {
         case WHEN_IN_FOCUSED_WINDOW:
             if (map != null && !(map instanceof ComponentInputMap)) {
                 throw new IllegalArgumentException("WHEN_IN_FOCUSED_WINDOW InputMaps must be of type ComponentInputMap");
             }
             windowInputMap = (ComponentInputMap)map;
             setFlag(WIF_INPUTMAP_CREATED, true);
             registerWithKeyboardManager(false);
             break;
         case WHEN_ANCESTOR_OF_FOCUSED_COMPONENT:
             ancestorInputMap = map;
             setFlag(ANCESTOR_INPUTMAP_CREATED, true);
             break;
         case WHEN_FOCUSED:
             focusInputMap = map;
             setFlag(FOCUS_INPUTMAP_CREATED, true);
             break;
         default:
             throw new IllegalArgumentException("condition must be one of JComponent.WHEN_IN_FOCUSED_WINDOW, JComponent.WHEN_FOCUSED or JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT");
         }
     }
 
     /**
      * Returns the <code>InputMap</code> that is used during
      * <code>condition</code>.
      *
      * @param condition one of WHEN_IN_FOCUSED_WINDOW, WHEN_FOCUSED,
      *        WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
      * @return the <code>InputMap</code> for the specified
      *          <code>condition</code>
      * @since 1.3
      */
     public final InputMap getInputMap(int condition) {
         return getInputMap(condition, true);
     }
 
     /**
      * Returns the <code>InputMap</code> that is used when the
      * component has focus.
      * This is convenience method for <code>getInputMap(WHEN_FOCUSED)</code>.
      *
      * @return the <code>InputMap</code> used when the component has focus
      * @since 1.3
      */
     public final InputMap getInputMap() {
         return getInputMap(WHEN_FOCUSED, true);
     }
 
     /**
      * Sets the <code>ActionMap</code> to <code>am</code>. This does not set
      * the parent of the <code>am</code> to be the <code>ActionMap</code>
      * from the UI (if there was one), it is up to the caller to have done this.
      *
      * @param am  the new <code>ActionMap</code>
      * @since 1.3
      */
     public final void setActionMap(ActionMap am) {
         actionMap = am;
         setFlag(ACTIONMAP_CREATED, true);
     }
 
     /**
      * Returns the <code>ActionMap</code> used to determine what
      * <code>Action</code> to fire for particular <code>KeyStroke</code>
      * binding. The returned <code>ActionMap</code>, unless otherwise
      * set, will have the <code>ActionMap</code> from the UI set as the parent.
      *
      * @return the <code>ActionMap</code> containing the key/action bindings
      * @since 1.3
      */
     public final ActionMap getActionMap() {
         return getActionMap(true);
     }
 
     /**
      * Returns the <code>InputMap</code> to use for condition
      * <code>condition</code>.  If the <code>InputMap</code> hasn't
      * been created, and <code>create</code> is
      * true, it will be created.
      *
      * @param condition one of the following values:
      * <ul>
      * <li>JComponent.FOCUS_INPUTMAP_CREATED
      * <li>JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
      * <li>JComponent.WHEN_IN_FOCUSED_WINDOW
      * </ul>
      * @param create if true, create the <code>InputMap</code> if it
      *          is not already created
      * @return the <code>InputMap</code> for the given <code>condition</code>;
      *          if <code>create</code> is false and the <code>InputMap</code>
      *          hasn't been created, returns <code>null</code>
      * @exception IllegalArgumentException if <code>condition</code>
      *          is not one of the legal values listed above
      */
     final InputMap getInputMap(int condition, boolean create) {
         switch (condition) {
         case WHEN_FOCUSED:
             if (getFlag(FOCUS_INPUTMAP_CREATED)) {
                 return focusInputMap;
             }
             // Hasn't been created yet.
             if (create) {
                 InputMap km = new InputMap();
                 setInputMap(condition, km);
                 return km;
             }
             break;
         case WHEN_ANCESTOR_OF_FOCUSED_COMPONENT:
             if (getFlag(ANCESTOR_INPUTMAP_CREATED)) {
                 return ancestorInputMap;
             }
             // Hasn't been created yet.
             if (create) {
                 InputMap km = new InputMap();
                 setInputMap(condition, km);
                 return km;
             }
             break;
         case WHEN_IN_FOCUSED_WINDOW:
             if (getFlag(WIF_INPUTMAP_CREATED)) {
                 return windowInputMap;
             }
             // Hasn't been created yet.
             if (create) {
                 ComponentInputMap km = new ComponentInputMap(this);
                 setInputMap(condition, km);
                 return km;
             }
             break;
         default:
             throw new IllegalArgumentException("condition must be one of JComponent.WHEN_IN_FOCUSED_WINDOW, JComponent.WHEN_FOCUSED or JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT");
         }
         return null;
     }
 
     /**
      * Finds and returns the appropriate <code>ActionMap</code>.
      *
      * @param create if true, create the <code>ActionMap</code> if it
      *          is not already created
      * @return the <code>ActionMap</code> for this component; if the
      *          <code>create</code> flag is false and there is no
      *          current <code>ActionMap</code>, returns <code>null</code>
      */
     final ActionMap getActionMap(boolean create) {
         if (getFlag(ACTIONMAP_CREATED)) {
             return actionMap;
         }
         // Hasn't been created.
         if (create) {
             ActionMap am = new ActionMap();
             setActionMap(am);
             return am;
         }
         return null;
     }
 
     /**
      * 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>
      * This method calls into the <code>ComponentUI</code> method of the
      * same name.  If this component does not have a <code>ComponentUI</code>
      * -1 will be returned.  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.
      *
      * @throws IllegalArgumentException {@inheritDoc}
      * @see #getBaselineResizeBehavior
      * @see java.awt.FontMetrics
      * @since 1.6
      */
     public int getBaseline(int width, int height) {
         // check size.
         super.getBaseline(width, height);
         if (ui != null) {
             return ui.getBaseline(this, width, height);
         }
         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>
      * This method calls into the <code>ComponentUI</code> method of
      * the same name.  If this component does not have a
      * <code>ComponentUI</code>
      * <code>BaselineResizeBehavior.OTHER</code> will be
      * returned.  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.
      *
      * @see #getBaseline(int, int)
      * @since 1.6
      */
     public BaselineResizeBehavior getBaselineResizeBehavior() {
         if (ui != null) {
             return ui.getBaselineResizeBehavior(this);
         }
         return BaselineResizeBehavior.OTHER;
     }
 
     /**
      * In release 1.4, the focus subsystem was rearchitected.
      * For more information, 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>.
      * <p>
      * Requests focus on this <code>JComponent</code>'s
      * <code>FocusTraversalPolicy</code>'s default <code>Component</code>.
      * If this <code>JComponent</code> is a focus cycle root, then its
      * <code>FocusTraversalPolicy</code> is used. Otherwise, the
      * <code>FocusTraversalPolicy</code> of this <code>JComponent</code>'s
      * focus-cycle-root ancestor is used.
      *
      * @see java.awt.FocusTraversalPolicy#getDefaultComponent
      * @deprecated As of 1.4, replaced by
      * <code>FocusTraversalPolicy.getDefaultComponent(Container).requestFocus()</code>
      */
     @Deprecated
     public boolean requestDefaultFocus() {
         Container nearestRoot =
             (isFocusCycleRoot()) ? this : getFocusCycleRootAncestor();
         if (nearestRoot == null) {
             return false;
         }
         Component comp = nearestRoot.getFocusTraversalPolicy().
             getDefaultComponent(nearestRoot);
         if (comp != null) {
             comp.requestFocus();
             return true;
         } else {
             return false;
         }
     }
 
     /**
      * Makes the component visible or invisible.
      * Overrides <code>Component.setVisible</code>.
      *
      * @param aFlag  true to make the component visible; false to
      *          make it invisible
      *
      * @beaninfo
      *    attribute: visualUpdate true
      */
     public void setVisible(boolean aFlag) {
         if(aFlag != isVisible()) {
             super.setVisible(aFlag);
             Container parent = getParent();
             if(parent != null) {
                 Rectangle r = getBounds();
                 parent.repaint(r.x,r.y,r.width,r.height);
             }
             // Some (all should) LayoutManagers do not consider components
             // that are not visible. As such we need to revalidate when the
             // visible bit changes.
             revalidate();
         }
     }
 
     /**
      * Sets whether or not this component is enabled.
      * A component that is enabled may respond to user input,
      * while a component that is not enabled cannot respond to
      * user input.  Some components may alter their visual
      * representation when they are disabled in order to
      * provide feedback to the user that they cannot take input.
      * <p>Note: Disabling a component does not disable its children.
      *
      * <p>Note: Disabling a lightweight component does not prevent it from
      * receiving MouseEvents.
      *
      * @param enabled true if this component should be enabled, false otherwise
      * @see java.awt.Component#isEnabled
      * @see java.awt.Component#isLightweight
      *
      * @beaninfo
      *    preferred: true
      *        bound: true
      *    attribute: visualUpdate true
      *  description: The enabled state of the component.
      */
     public void setEnabled(boolean enabled) {
         boolean oldEnabled = isEnabled();
         super.setEnabled(enabled);
         firePropertyChange("enabled", oldEnabled, enabled);
         if (enabled != oldEnabled) {
             repaint();
         }
     }
 
     /**
      * Sets the foreground color of this component.  It is up to the
      * look and feel to honor this property, some may choose to ignore
      * it.
      *
      * @param fg  the desired foreground <code>Color</code>
      * @see java.awt.Component#getForeground
      *
      * @beaninfo
      *    preferred: true
      *        bound: true
      *    attribute: visualUpdate true
      *  description: The foreground color of the component.
      */
     public void setForeground(Color fg) {
         Color oldFg = getForeground();
         super.setForeground(fg);
         if ((oldFg != null) ? !oldFg.equals(fg) : ((fg != null) && !fg.equals(oldFg))) {
             // foreground already bound in AWT1.2
             repaint();
         }
     }
 
     /**
      * Sets the background color of this component.  The background
      * color is used only if the component is opaque, and only
      * by subclasses of <code>JComponent</code> or
      * <code>ComponentUI</code> implementations.  Direct subclasses of
      * <code>JComponent</code> must override
      * <code>paintComponent</code> to honor this property.
      * <p>
      * It is up to the look and feel to honor this property, some may
      * choose to ignore it.
      *
      * @param bg the desired background <code>Color</code>
      * @see java.awt.Component#getBackground
      * @see #setOpaque
      *
      * @beaninfo
      *    preferred: true
      *        bound: true
      *    attribute: visualUpdate true
      *  description: The background color of the component.
      */
     public void setBackground(Color bg) {
         Color oldBg = getBackground();
         super.setBackground(bg);
         if ((oldBg != null) ? !oldBg.equals(bg) : ((bg != null) && !bg.equals(oldBg))) {
             // background already bound in AWT1.2
             repaint();
         }
     }
 
     /**
      * Sets the font for this component.
      *
      * @param font the desired <code>Font</code> for this component
      * @see java.awt.Component#getFont
      *
      * @beaninfo
      *    preferred: true
      *        bound: true
      *    attribute: visualUpdate true
      *  description: The font for the component.
      */
     public void setFont(Font font) {
         Font oldFont = getFont();
         super.setFont(font);
         // font already bound in AWT1.2
         if (font != oldFont) {
             revalidate();
             repaint();
         }
     }
 
     /**
      * Returns the default locale used to initialize each JComponent's
      * locale property upon creation.
      *
      * The default locale has "AppContext" scope so that applets (and
      * potentially multiple lightweight applications running in a single VM)
      * can have their own setting. An applet can safely alter its default
      * locale because it will have no affect on other applets (or the browser).
      *
      * @return the default <code>Locale</code>.
      * @see #setDefaultLocale
      * @see java.awt.Component#getLocale
      * @see #setLocale
      * @since 1.4
      */
     static public Locale getDefaultLocale() {
         Locale l = (Locale) SwingUtilities.appContextGet(defaultLocale);
         if( l == null ) {
             //REMIND(bcb) choosing the default value is more complicated
             //than this.
             l = Locale.getDefault();
             JComponent.setDefaultLocale( l );
         }
         return l;
     }
 
 
     /**
      * Sets the default locale used to initialize each JComponent's locale
      * property upon creation.  The initial value is the VM's default locale.
      *
      * The default locale has "AppContext" scope so that applets (and
      * potentially multiple lightweight applications running in a single VM)
      * can have their own setting. An applet can safely alter its default
      * locale because it will have no affect on other applets (or the browser).
      *
      * @param l the desired default <code>Locale</code> for new components.
      * @see #getDefaultLocale
      * @see java.awt.Component#getLocale
      * @see #setLocale
      * @since 1.4
      */
     static public void setDefaultLocale( Locale l ) {
         SwingUtilities.appContextPut(defaultLocale, l);
     }
 
 
     /**
      * Processes any key events that the component itself
      * recognizes.  This is called after the focus
      * manager and any interested listeners have been
      * given a chance to steal away the event.  This
      * method is called only if the event has not
      * yet been consumed.  This method is called prior
      * to the keyboard UI logic.
      * <p>
      * This method is implemented to do nothing.  Subclasses would
      * normally override this method if they process some
      * key events themselves.  If the event is processed,
      * it should be consumed.
      */
     protected void processComponentKeyEvent(KeyEvent e) {
     }
 
     /** Overrides <code>processKeyEvent</code> to process events. **/
     protected void processKeyEvent(KeyEvent e) {
       boolean result;
       boolean shouldProcessKey;
 
       // This gives the key event listeners a crack at the event
       super.processKeyEvent(e);
 
       // give the component itself a crack at the event
       if (! e.isConsumed()) {
           processComponentKeyEvent(e);
       }
 
       shouldProcessKey = KeyboardState.shouldProcess(e);
 
       if(e.isConsumed()) {
         return;
       }
 
       if (shouldProcessKey && processKeyBindings(e, e.getID() ==
                                                  KeyEvent.KEY_PRESSED)) {
           e.consume();
       }
     }
 
     /**
      * Invoked to process the key bindings for <code>ks</code> as the result
      * of the <code>KeyEvent</code> <code>e</code>. This obtains
      * the appropriate <code>InputMap</code>,
      * gets the binding, gets the action from the <code>ActionMap</code>,
      * and then (if the action is found and the component
      * is enabled) invokes <code>notifyAction</code> to notify the action.
      *
      * @param ks  the <code>KeyStroke</code> queried
      * @param e the <code>KeyEvent</code>
      * @param condition one of the following values:
      * <ul>
      * <li>JComponent.WHEN_FOCUSED
      * <li>JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT
      * <li>JComponent.WHEN_IN_FOCUSED_WINDOW
      * </ul>
      * @param pressed true if the key is pressed
      * @return true if there was a binding to an action, and the action
      *         was enabled
      *
      * @since 1.3
      */
     protected boolean processKeyBinding(KeyStroke ks, KeyEvent e,
                                         int condition, boolean pressed) {
         InputMap map = getInputMap(condition, false);
         ActionMap am = getActionMap(false);
 
         if(map != null && am != null && isEnabled()) {
             Object binding = map.get(ks);
             Action action = (binding == null) ? null : am.get(binding);
             if (action != null) {
                 return SwingUtilities.notifyAction(action, ks, e, this,
                                                    e.getModifiers());
             }
         }
         return false;
     }
 
     /**
      * This is invoked as the result of a <code>KeyEvent</code>
      * that was not consumed by the <code>FocusManager</code>,
      * <code>KeyListeners</code>, or the component. It will first try
      * <code>WHEN_FOCUSED</code> bindings,
      * then <code>WHEN_ANCESTOR_OF_FOCUSED_COMPONENT</code> bindings,
      * and finally <code>WHEN_IN_FOCUSED_WINDOW</code> bindings.
      *
      * @param e the unconsumed <code>KeyEvent</code>
      * @param pressed true if the key is pressed
      * @return true if there is a key binding for <code>e</code>
      */
     boolean processKeyBindings(KeyEvent e, boolean pressed) {
       if (!SwingUtilities.isValidKeyEventForKeyBindings(e)) {
           return false;
       }
       // Get the KeyStroke
       // There may be two keystrokes associated with a low-level key event;
       // in this case a keystroke made of an extended key code has a priority.
       KeyStroke ks;
       KeyStroke ksE = null;
 
       if (e.getID() == KeyEvent.KEY_TYPED) {
           ks = KeyStroke.getKeyStroke(e.getKeyChar());
       }
       else {
           ks = KeyStroke.getKeyStroke(e.getKeyCode(),e.getModifiers(),
                                     (pressed ? false:true));
           if (e.getKeyCode() != e.getExtendedKeyCode()) {
               ksE = KeyStroke.getKeyStroke(e.getExtendedKeyCode(),e.getModifiers(),
                                     (pressed ? false:true));
           }
       }
 
       // Do we have a key binding for e?
       // If we have a binding by an extended code, use it.
       // If not, check for regular code binding.
       if(ksE != null && processKeyBinding(ksE, e, WHEN_FOCUSED, pressed)) {
           return true;
       }
       if(processKeyBinding(ks, e, WHEN_FOCUSED, pressed))
           return true;
 
       /* We have no key binding. Let's try the path from our parent to the
        * window excluded. We store the path components so we can avoid
        * asking the same component twice.
        */
       Container parent = this;
       while (parent != null && !(parent instanceof Window) &&
              !(parent instanceof Applet)) {
           if(parent instanceof JComponent) {
               if(ksE != null && ((JComponent)parent).processKeyBinding(ksE, e,
                                WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, pressed))
                   return true;
               if(((JComponent)parent).processKeyBinding(ks, e,
                                WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, pressed))
                   return true;
           }
           // This is done so that the children of a JInternalFrame are
           // given precedence for WHEN_IN_FOCUSED_WINDOW bindings before
           // other components WHEN_IN_FOCUSED_WINDOW bindings. This also gives
           // more precedence to the WHEN_IN_FOCUSED_WINDOW bindings of the
           // JInternalFrame's children vs the
           // WHEN_ANCESTOR_OF_FOCUSED_COMPONENT bindings of the parents.
           // maybe generalize from JInternalFrame (like isFocusCycleRoot).
           if ((parent instanceof JInternalFrame) &&
               JComponent.processKeyBindingsForAllComponents(e,parent,pressed)){
               return true;
           }
           parent = parent.getParent();
       }
 
       /* No components between the focused component and the window is
        * actually interested by the key event. Let's try the other
        * JComponent in this window.
        */
       if(parent != null) {
         return JComponent.processKeyBindingsForAllComponents(e,parent,pressed);
       }
       return false;
     }
 
     static boolean processKeyBindingsForAllComponents(KeyEvent e,
                                       Container container, boolean pressed) {
         while (true) {
             if (KeyboardManager.getCurrentManager().fireKeyboardAction(
                                 e, pressed, container)) {
                 return true;
             }
             if (container instanceof Popup.HeavyWeightWindow) {
                 container = ((Window)container).getOwner();
             }
             else {
                 return false;
             }
         }
     }
 
     /**
      * Registers the text to display in a tool tip.
      * The text displays when the cursor lingers over the component.
      * <p>
      * See <a href="http://java.sun.com/docs/books/tutorial/uiswing/components/tooltip.html">How to Use Tool Tips</a>
      * in <em>The Java Tutorial</em>
      * for further documentation.
      *
      * @param text  the string to display; if the text is <code>null</code>,
      *              the tool tip is turned off for this component
      * @see #TOOL_TIP_TEXT_KEY
      * @beaninfo
      *   preferred: true
      * description: The text to display in a tool tip.
      */
     public void setToolTipText(String text) {
         String oldText = getToolTipText();
         putClientProperty(TOOL_TIP_TEXT_KEY, text);
         ToolTipManager toolTipManager = ToolTipManager.sharedInstance();
         if (text != null) {
             if (oldText == null) {
                 toolTipManager.registerComponent(this);
             }
         } else {
             toolTipManager.unregisterComponent(this);
         }
     }
 
     /**
      * Returns the tooltip string that has been set with
      * <code>setToolTipText</code>.
      *
      * @return the text of the tool tip
      * @see #TOOL_TIP_TEXT_KEY
      */
     public String getToolTipText() {
         return (String)getClientProperty(TOOL_TIP_TEXT_KEY);
     }
 
 
     /**
      * Returns the string to be used as the tooltip for <i>event</i>.
      * By default this returns any string set using
      * <code>setToolTipText</code>.  If a component provides
      * more extensive API to support differing tooltips at different locations,
      * this method should be overridden.
      */
     public String getToolTipText(MouseEvent event) {
         return getToolTipText();
     }
 
     /**
      * Returns the tooltip location in this component's coordinate system.
      * If <code>null</code> is returned, Swing will choose a location.
      * The default implementation returns <code>null</code>.
      *
      * @param event  the <code>MouseEvent</code> that caused the
      *          <code>ToolTipManager</code> to show the tooltip
      * @return always returns <code>null</code>
      */
     public Point getToolTipLocation(MouseEvent event) {
         return null;
     }
 
     /**
      * Returns the preferred location to display the popup menu in this
      * component's coordinate system. It is up to the look and feel to
      * honor this property, some may choose to ignore it.
      * If {@code null}, the look and feel will choose a suitable location.
      *
      * @param event the {@code MouseEvent} that triggered the popup to be
      *        shown, or {@code null} if the popup is not being shown as the
      *        result of a mouse event
      * @return location to display the {@code JPopupMenu}, or {@code null}
      * @since 1.5
      */
     public Point getPopupLocation(MouseEvent event) {
         return null;
     }
 
 
     /**
      * Returns the instance of <code>JToolTip</code> that should be used
      * to display the tooltip.
      * Components typically would not override this method,
      * but it can be used to
      * cause different tooltips to be displayed differently.
      *
      * @return the <code>JToolTip</code> used to display this toolTip
      */
     public JToolTip createToolTip() {
         JToolTip tip = new JToolTip();
         tip.setComponent(this);
         return tip;
     }
 
     /**
      * Forwards the <code>scrollRectToVisible()</code> message to the
      * <code>JComponent</code>'s parent. Components that can service
      * the request, such as <code>JViewport</code>,
      * override this method and perform the scrolling.
      *
      * @param aRect the visible <code>Rectangle</code>
      * @see JViewport
      */
     public void scrollRectToVisible(Rectangle aRect) {
         Container parent;
         int dx = getX(), dy = getY();
 
         for (parent = getParent();
                  !(parent == null) &&
                  !(parent instanceof JComponent) &&
                  !(parent instanceof CellRendererPane);
              parent = parent.getParent()) {
              Rectangle bounds = parent.getBounds();
 
              dx += bounds.x;
              dy += bounds.y;
         }
 
         if (!(parent == null) && !(parent instanceof CellRendererPane)) {
             aRect.x += dx;
             aRect.y += dy;
 
             ((JComponent)parent).scrollRectToVisible(aRect);
             aRect.x -= dx;
             aRect.y -= dy;
         }
     }
 
     /**
      * Sets the <code>autoscrolls</code> property.
      * If <code>true</code> mouse dragged events will be
      * synthetically generated when the mouse is dragged
      * outside of the component's bounds and mouse motion
      * has paused (while the button continues to be held
      * down). The synthetic events make it appear that the
      * drag gesture has resumed in the direction established when
      * the component's boundary was crossed.  Components that
      * support autoscrolling must handle <code>mouseDragged</code>
      * events by calling <code>scrollRectToVisible</code> with a
      * rectangle that contains the mouse event's location.  All of
      * the Swing components that support item selection and are
      * typically displayed in a <code>JScrollPane</code>
      * (<code>JTable</code>, <code>JList</code>, <code>JTree</code>,
      * <code>JTextArea</code>, and <code>JEditorPane</code>)
      * already handle mouse dragged events in this way.  To enable
      * autoscrolling in any other component, add a mouse motion
      * listener that calls <code>scrollRectToVisible</code>.
      * For example, given a <code>JPanel</code>, <code>myPanel</code>:
      * <pre>
      * MouseMotionListener doScrollRectToVisible = new MouseMotionAdapter() {
      *     public void mouseDragged(MouseEvent e) {
      *        Rectangle r = new Rectangle(e.getX(), e.getY(), 1, 1);
      *        ((JPanel)e.getSource()).scrollRectToVisible(r);
      *    }
      * };
      * myPanel.addMouseMotionListener(doScrollRectToVisible);
      * </pre>
      * The default value of the <code>autoScrolls</code>
      * property is <code>false</code>.
      *
      * @param autoscrolls if true, synthetic mouse dragged events
      *   are generated when the mouse is dragged outside of a component's
      *   bounds and the mouse button continues to be held down; otherwise
      *   false
      * @see #getAutoscrolls
      * @see JViewport
      * @see JScrollPane
      *
      * @beaninfo
      *      expert: true
      * description: Determines if this component automatically scrolls its contents when dragged.
      */
     public void setAutoscrolls(boolean autoscrolls) {
         setFlag(AUTOSCROLLS_SET, true);
         if (this.autoscrolls != autoscrolls) {
             this.autoscrolls = autoscrolls;
             if (autoscrolls) {
                 enableEvents(AWTEvent.MOUSE_EVENT_MASK);
                 enableEvents(AWTEvent.MOUSE_MOTION_EVENT_MASK);
             }
             else {
                 Autoscroller.stop(this);
             }
         }
     }
 
     /**
      * Gets the <code>autoscrolls</code> property.
      *
      * @return the value of the <code>autoscrolls</code> property
      * @see JViewport
      * @see #setAutoscrolls
      */
     public boolean getAutoscrolls() {
         return autoscrolls;
     }
 
     /**
      * Sets the {@code TransferHandler}, which provides support for transfer
      * of data into and out of this component via cut/copy/paste and drag
      * and drop. This may be {@code null} if the component does not support
      * data transfer operations.
      * <p>
      * If the new {@code TransferHandler} is not {@code null}, this method
      * also installs a <b>new</b> {@code DropTarget} on the component to
      * activate drop handling through the {@code TransferHandler} and activate
      * any built-in support (such as calculating and displaying potential drop
      * locations). If you do not wish for this component to respond in any way
      * to drops, you can disable drop support entirely either by removing the
      * drop target ({@code setDropTarget(null)}) or by de-activating it
      * ({@code getDropTaget().setActive(false)}).
      * <p>
      * If the new {@code TransferHandler} is {@code null}, this method removes
      * the drop target.
      * <p>
      * Under two circumstances, this method does not modify the drop target:
      * First, if the existing drop target on this component was explicitly
      * set by the developer to a {@code non-null} value. Second, if the
      * system property {@code suppressSwingDropSupport} is {@code true}. The
      * default value for the system property is {@code false}.
      * <p>
      * Please see
      * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/dnd.html">
      * How to Use Drag and Drop and Data Transfer</a>,
      * a section in <em>The Java Tutorial</em>, for more information.
      *
      * @param newHandler the new {@code TransferHandler}
      *
      * @see TransferHandler
      * @see #getTransferHandler
      * @since 1.4
      * @beaninfo
      *        bound: true
      *       hidden: true
      *  description: Mechanism for transfer of data to and from the component
      */
     public void setTransferHandler(TransferHandler newHandler) {
         TransferHandler oldHandler = (TransferHandler)getClientProperty(
                                       JComponent_TRANSFER_HANDLER);
         putClientProperty(JComponent_TRANSFER_HANDLER, newHandler);
 
         SwingUtilities.installSwingDropTargetAsNecessary(this, newHandler);
         firePropertyChange("transferHandler", oldHandler, newHandler);
     }
 
     /**
      * Gets the <code>transferHandler</code> property.
      *
      * @return  the value of the <code>transferHandler</code> property
      *
      * @see TransferHandler
      * @see #setTransferHandler
      * @since 1.4
      */
     public TransferHandler getTransferHandler() {
         return (TransferHandler)getClientProperty(JComponent_TRANSFER_HANDLER);
     }
 
     /**
      * Calculates a custom drop location for this type of component,
      * representing where a drop at the given point should insert data.
      * <code>null</code> is returned if this component doesn't calculate
      * custom drop locations. In this case, <code>TransferHandler</code>
      * will provide a default <code>DropLocation</code> containing just
      * the point.
      *
      * @param p the point to calculate a drop location for
      * @return the drop location, or <code>null</code>
      */
     TransferHandler.DropLocation dropLocationForPoint(Point p) {
         return null;
     }
 
     /**
      * Called to set or clear the drop location during a DnD operation.
      * In some cases, the component may need to use its internal selection
      * temporarily to indicate the drop location. To help facilitate this,
      * this method returns and accepts as a parameter a state object.
      * This state object can be used to store, and later restore, the selection
      * state. Whatever this method returns will be passed back to it in
      * future calls, as the state parameter. If it wants the DnD system to
      * continue storing the same state, it must pass it back every time.
      * Here's how this is used:
      * <p>
      * Let's say that on the first call to this method the component decides
      * to save some state (because it is about to use the selection to show
      * a drop index). It can return a state object to the caller encapsulating
      * any saved selection state. On a second call, let's say the drop location
      * is being changed to something else. The component doesn't need to
      * restore anything yet, so it simply passes back the same state object
      * to have the DnD system continue storing it. Finally, let's say this
      * method is messaged with <code>null</code>. This means DnD
      * is finished with this component for now, meaning it should restore
      * state. At this point, it can use the state parameter to restore
      * said state, and of course return <code>null</code> since there's
      * no longer anything to store.
      *
      * @param location the drop location (as calculated by
      *        <code>dropLocationForPoint</code>) or <code>null</code>
      *        if there's no longer a valid drop location
      * @param state the state object saved earlier for this component,
      *        or <code>null</code>
      * @param forDrop whether or not the method is being called because an
      *        actual drop occurred
      * @return any saved state for this component, or <code>null</code> if none
      */
     Object setDropLocation(TransferHandler.DropLocation location,
                            Object state,
                            boolean forDrop) {
 
         return null;
     }
 
     /**
      * Called to indicate to this component that DnD is done.
      * Needed by <code>JTree</code>.
      */
     void dndDone() {
     }
 
     /**
      * Processes mouse events occurring on this component by
      * dispatching them to any registered
      * <code>MouseListener</code> objects, refer to
      * {@link java.awt.Component#processMouseEvent(MouseEvent)}
      * for a complete description of this method.
      *
      * @param       e the mouse event
      * @see         java.awt.Component#processMouseEvent
      * @since       1.5
      */
     protected void processMouseEvent(MouseEvent e) {
         if (autoscrolls && e.getID() == MouseEvent.MOUSE_RELEASED) {
             Autoscroller.stop(this);
         }
         super.processMouseEvent(e);
     }
 
     /**
      * Processes mouse motion events, such as MouseEvent.MOUSE_DRAGGED.
      *
      * @param e the <code>MouseEvent</code>
      * @see MouseEvent
      */
     protected void processMouseMotionEvent(MouseEvent e) {
         boolean dispatch = true;
         if (autoscrolls && e.getID() == MouseEvent.MOUSE_DRAGGED) {
             // We don't want to do the drags when the mouse moves if we're
             // autoscrolling.  It makes it feel spastic.
             dispatch = !Autoscroller.isRunning(this);
             Autoscroller.processMouseDragged(e);
         }
         if (dispatch) {
             super.processMouseMotionEvent(e);
         }
     }
 
     // Inner classes can't get at this method from a super class
     void superProcessMouseMotionEvent(MouseEvent e) {
         super.processMouseMotionEvent(e);
     }
 
     /**
      * This is invoked by the <code>RepaintManager</code> if
      * <code>createImage</code> is called on the component.
      *
      * @param newValue true if the double buffer image was created from this component
      */
     void setCreatedDoubleBuffer(boolean newValue) {
         setFlag(CREATED_DOUBLE_BUFFER, newValue);
     }
 
     /**
      * Returns true if the <code>RepaintManager</code>
      * created the double buffer image from the component.
      *
      * @return true if this component had a double buffer image, false otherwise
      */
     boolean getCreatedDoubleBuffer() {
         return getFlag(CREATED_DOUBLE_BUFFER);
     }
 
     /**
      * <code>ActionStandin</code> is used as a standin for
      * <code>ActionListeners</code> that are
      * added via <code>registerKeyboardAction</code>.
      */
     final class ActionStandin implements Action {
         private final ActionListener actionListener;
         private final String command;
         // This will be non-null if actionListener is an Action.
         private final Action action;
 
         ActionStandin(ActionListener actionListener, String command) {
             this.actionListener = actionListener;
             if (actionListener instanceof Action) {
                 this.action = (Action)actionListener;
             }
             else {
                 this.action = null;
             }
             this.command = command;
         }
 
         public Object getValue(String key) {
             if (key != null) {
                 if (key.equals(Action.ACTION_COMMAND_KEY)) {
                     return command;
                 }
                 if (action != null) {
                     return action.getValue(key);
                 }
                 if (key.equals(NAME)) {
                     return "ActionStandin";
                 }
             }
             return null;
         }
 
         public boolean isEnabled() {
             if (actionListener == null) {
                 // This keeps the old semantics where
                 // registerKeyboardAction(null) would essentialy remove
                 // the binding. We don't remove the binding from the
                 // InputMap as that would still allow parent InputMaps
                 // bindings to be accessed.
                 return false;
             }
             if (action == null) {
                 return true;
             }
             return action.isEnabled();
         }
 
         public void actionPerformed(ActionEvent ae) {
             if (actionListener != null) {
                 actionListener.actionPerformed(ae);
             }
         }
 
         // We don't allow any values to be added.
         public void putValue(String key, Object value) {}
 
         // Does nothing, our enabledness is determiend from our asociated
         // action.
         public void setEnabled(boolean b) { }
 
         public void addPropertyChangeListener
                     (PropertyChangeListener listener) {}
         public void removePropertyChangeListener
                           (PropertyChangeListener listener) {}
     }
 
 
     // This class is used by the KeyboardState class to provide a single
     // instance that can be stored in the AppContext.
     static final class IntVector {
         int array[] = null;
         int count = 0;
         int capacity = 0;
 
         int size() {
             return count;
         }
 
         int elementAt(int index) {
             return array[index];
         }
 
         void addElement(int value) {
             if (count == capacity) {
                 capacity = (capacity + 2) * 2;
                 int[] newarray = new int[capacity];
                 if (count > 0) {
                     System.arraycopy(array, 0, newarray, 0, count);
                 }
                 array = newarray;
             }
             array[count++] = value;
         }
 
         void setElementAt(int value, int index) {
             array[index] = value;
         }
     }
 
     static class KeyboardState implements Serializable {
         private static final Object keyCodesKey =
             JComponent.KeyboardState.class;
 
         // Get the array of key codes from the AppContext.
         static IntVector getKeyCodeArray() {
             IntVector iv =
                 (IntVector)SwingUtilities.appContextGet(keyCodesKey);
             if (iv == null) {
                 iv = new IntVector();
                 SwingUtilities.appContextPut(keyCodesKey, iv);
             }
             return iv;
         }
 
         static void registerKeyPressed(int keyCode) {
             IntVector kca = getKeyCodeArray();
             int count = kca.size();
             int i;
             for(i=0;i<count;i++) {
                 if(kca.elementAt(i) == -1){
                     kca.setElementAt(keyCode, i);
                     return;
                 }
             }
             kca.addElement(keyCode);
         }
 
         static void registerKeyReleased(int keyCode) {
             IntVector kca = getKeyCodeArray();
             int count = kca.size();
             int i;
             for(i=0;i<count;i++) {
                 if(kca.elementAt(i) == keyCode) {
                     kca.setElementAt(-1, i);
                     return;
                 }
             }
         }
 
         static boolean keyIsPressed(int keyCode) {
             IntVector kca = getKeyCodeArray();
             int count = kca.size();
             int i;
             for(i=0;i<count;i++) {
                 if(kca.elementAt(i) == keyCode) {
                     return true;
                 }
             }
             return false;
         }
 
         /**
          * Updates internal state of the KeyboardState and returns true
          * if the event should be processed further.
          */
         static boolean shouldProcess(KeyEvent e) {
             switch (e.getID()) {
             case KeyEvent.KEY_PRESSED:
                 if (!keyIsPressed(e.getKeyCode())) {
                     registerKeyPressed(e.getKeyCode());
                 }
                 return true;
             case KeyEvent.KEY_RELEASED:
                 // We are forced to process VK_PRINTSCREEN separately because
                 // the Windows doesn't generate the key pressed event for
                 // printscreen and it block the processing of key release
                 // event for printscreen.
                 if (keyIsPressed(e.getKeyCode()) || e.getKeyCode()==KeyEvent.VK_PRINTSCREEN) {
                     registerKeyReleased(e.getKeyCode());
                     return true;
                 }
                 return false;
             case KeyEvent.KEY_TYPED:
                 return true;
             default:
                 // Not a known KeyEvent type, bail.
                 return false;
             }
       }
     }
 
     static final sun.awt.RequestFocusController focusController =
         new sun.awt.RequestFocusController() {
             public boolean acceptRequestFocus(Component from, Component to,
                                               boolean temporary, boolean focusedWindowChangeAllowed,
                                               sun.awt.CausedFocusEvent.Cause cause)
             {
                 if ((to == null) || !(to instanceof JComponent)) {
                     return true;
                 }
 
                 if ((from == null) || !(from instanceof JComponent)) {
                     return true;
                 }
 
                 JComponent target = (JComponent) to;
                 if (!target.getVerifyInputWhenFocusTarget()) {
                     return true;
                 }
 
                 JComponent jFocusOwner = (JComponent)from;
                 InputVerifier iv = jFocusOwner.getInputVerifier();
 
                 if (iv == null) {
                     return true;
                 } else {
                     Object currentSource = SwingUtilities.appContextGet(
                             INPUT_VERIFIER_SOURCE_KEY);
                     if (currentSource == jFocusOwner) {
                         // We're currently calling into the InputVerifier
                         // for this component, so allow the focus change.
                         return true;
                     }
                     SwingUtilities.appContextPut(INPUT_VERIFIER_SOURCE_KEY,
                                                  jFocusOwner);
                     try {
                         return iv.shouldYieldFocus(jFocusOwner);
                     } finally {
                         if (currentSource != null) {
                             // We're already in the InputVerifier for
                             // currentSource. By resetting the currentSource
                             // we ensure that if the InputVerifier for
                             // currentSource does a requestFocus, we don't
                             // try and run the InputVerifier again.
                             SwingUtilities.appContextPut(
                                 INPUT_VERIFIER_SOURCE_KEY, currentSource);
                         } else {
                             SwingUtilities.appContextRemove(
                                 INPUT_VERIFIER_SOURCE_KEY);
                         }
                     }
                 }
             }
         };
 
     /*
      * --- Accessibility Support ---
      */
 
     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>java.awt.Component.setEnabled(boolean)</code>.
      */
     @Deprecated
     public void enable() {
         if (isEnabled() != true) {
             super.enable();
             if (accessibleContext != null) {
                 accessibleContext.firePropertyChange(
                     AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                     null, AccessibleState.ENABLED);
             }
         }
     }
 
     /**
      * @deprecated As of JDK version 1.1,
      * replaced by <code>java.awt.Component.setEnabled(boolean)</code>.
      */
     @Deprecated
     public void disable() {
         if (isEnabled() != false) {
             super.disable();
             if (accessibleContext != null) {
                 accessibleContext.firePropertyChange(
                     AccessibleContext.ACCESSIBLE_STATE_PROPERTY,
                     AccessibleState.ENABLED, null);
             }
         }
     }
 
     /**
      * The <code>AccessibleContext</code> associated with this
      * <code>JComponent</code>.
      */
     protected AccessibleContext accessibleContext = null;
 
     /**
      * Returns the <code>AccessibleContext</code> associated with this
      * <code>JComponent</code>.  The method implemented by this base
      * class returns null.  Classes that extend <code>JComponent</code>
      * should implement this method to return the
      * <code>AccessibleContext</code> associated with the subclass.
      *
      * @return the <code>AccessibleContext</code> of this
      *          <code>JComponent</code>
      */
     public AccessibleContext getAccessibleContext() {
         return accessibleContext;
     }
 
     /**
      * Inner class of JComponent 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>
      * <strong>Warning:</strong>
      * Serialized objects of this class will not be compatible with
      * future Swing releases. The current serialization support is
      * appropriate for short term storage or RMI between applications running
      * the same version of Swing.  As of 1.4, support for long term storage
      * of all JavaBeans<sup><font size="-2">TM</font></sup>
      * has been added to the <code>java.beans</code> package.
      * Please see {@link java.beans.XMLEncoder}.
      */
     public abstract class AccessibleJComponent extends AccessibleAWTContainer
        implements AccessibleExtendedComponent
     {
         /**
          * Though the class is abstract, this should be called by
          * all sub-classes.
          */
         protected AccessibleJComponent() {
             super();
         }
 
         protected ContainerListener accessibleContainerHandler = null;
         protected FocusListener accessibleFocusHandler = null;
 
         /**
          * Fire PropertyChange listener, if one is registered,
          * when children added/removed.
          */
         protected class AccessibleContainerHandler
             implements ContainerListener {
             public void componentAdded(ContainerEvent e) {
                 Component c = e.getChild();
                 if (c != null && c instanceof Accessible) {
                     AccessibleJComponent.this.firePropertyChange(
                         AccessibleContext.ACCESSIBLE_CHILD_PROPERTY,
                         null, c.getAccessibleContext());
                 }
             }
             public void componentRemoved(ContainerEvent e) {
                 Component c = e.getChild();
                 if (c != null && c instanceof Accessible) {
                     AccessibleJComponent.this.firePropertyChange(
                         AccessibleContext.ACCESSIBLE_CHILD_PROPERTY,
                         c.getAccessibleContext(), null);
                 }
             }
         }
 
         /**
          * Fire PropertyChange listener, if one is registered,
          * when focus events happen
          * @since 1.3
          */
         protected class AccessibleFocusHandler 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 AccessibleFocusHandler
 
 
         /**
          * Adds a PropertyChangeListener to the listener list.
          *
          * @param listener  the PropertyChangeListener to be added
          */
         public void addPropertyChangeListener(PropertyChangeListener listener) {
             if (accessibleFocusHandler == null) {
                 accessibleFocusHandler = new AccessibleFocusHandler();
                 JComponent.this.addFocusListener(accessibleFocusHandler);
             }
             if (accessibleContainerHandler == null) {
                 accessibleContainerHandler = new AccessibleContainerHandler();
                 JComponent.this.addContainerListener(accessibleContainerHandler);
             }
             super.addPropertyChangeListener(listener);
         }
 
         /**
          * Removes 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 (accessibleFocusHandler != null) {
                 JComponent.this.removeFocusListener(accessibleFocusHandler);
                 accessibleFocusHandler = null;
             }
             super.removePropertyChangeListener(listener);
         }
 
 
 
         /**
          * Recursively search through the border hierarchy (if it exists)
          * for a TitledBorder with a non-null title.  This does a depth
          * first search on first the inside borders then the outside borders.
          * The assumption is that titles make really pretty inside borders
          * but not very pretty outside borders in compound border situations.
          * It's rather arbitrary, but hopefully decent UI programmers will
          * not create multiple titled borders for the same component.
          */
         protected String getBorderTitle(Border b) {
             String s;
             if (b instanceof TitledBorder) {
                 return ((TitledBorder) b).getTitle();
             } else if (b instanceof CompoundBorder) {
                 s = getBorderTitle(((CompoundBorder) b).getInsideBorder());
                 if (s == null) {
                     s = getBorderTitle(((CompoundBorder) b).getOutsideBorder());
                 }
                 return s;
             } else {
                 return null;
             }
         }
 
         // AccessibleContext methods
         //
         /**
          * Gets the accessible name of this object.  This should almost never
          * return java.awt.Component.getName(), as that generally isn't
          * a localized name, and doesn't have meaning for the user.  If the
          * object is fundamentally a text object (such as a menu item), the
          * accessible name should be the text of the object (for example,
          * "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 null if this
          *         object does not have a name
          * @see AccessibleContext#setAccessibleName
          */
         public String getAccessibleName() {
             String name = accessibleName;
 
             // fallback to the client name property
             //
             if (name == null) {
                 name = (String)getClientProperty(AccessibleContext.ACCESSIBLE_NAME_PROPERTY);
             }
 
             // fallback to the titled border if it exists
             //
             if (name == null) {
                 name = getBorderTitle(getBorder());
             }
 
             // fallback to the label labeling us if it exists
             //
             if (name == null) {
                 Object o = getClientProperty(JLabel.LABELED_BY_PROPERTY);
                 if (o instanceof Accessible) {
                     AccessibleContext ac = ((Accessible) o).getAccessibleContext();
                     if (ac != null) {
                         name = ac.getAccessibleName();
                     }
                 }
             }
             return name;
         }
 
         /**
          * 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 - for example 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 null if
          * this object does not have a description
          * @see AccessibleContext#setAccessibleDescription
          */
         public String getAccessibleDescription() {
             String description = accessibleDescription;
 
             // fallback to the client description property
             //
             if (description == null) {
                 description = (String)getClientProperty(AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY);
             }
 
             // fallback to the tool tip text if it exists
             //
             if (description == null) {
                 try {
                     description = getToolTipText();
                 } catch (Exception e) {
                     // Just in case the subclass overrode the
                     // getToolTipText method and actually
                     // requires a MouseEvent.
                     // [[[FIXME:  WDW - we probably should require this
                     // method to take a MouseEvent and just pass it on
                     // to getToolTipText.  The swing-feedback traffic
                     // leads me to believe getToolTipText might change,
                     // though, so I was hesitant to make this change at
                     // this time.]]]
                 }
             }
 
             // fallback to the label labeling us if it exists
             //
             if (description == null) {
                 Object o = getClientProperty(JLabel.LABELED_BY_PROPERTY);
                 if (o instanceof Accessible) {
                     AccessibleContext ac = ((Accessible) o).getAccessibleContext();
                     if (ac != null) {
                         description = ac.getAccessibleDescription();
                     }
                 }
             }
 
             return description;
         }
 
         /**
          * Gets the role of this object.
          *
          * @return an instance of AccessibleRole describing the role of the
          * object
          * @see AccessibleRole
          */
         public AccessibleRole getAccessibleRole() {
             return AccessibleRole.SWING_COMPONENT;
         }
 
         /**
          * Gets the state of this object.
          *
          * @return an instance of AccessibleStateSet containing the current
          * state set of the object
          * @see AccessibleState
          */
         public AccessibleStateSet getAccessibleStateSet() {
             AccessibleStateSet states = super.getAccessibleStateSet();
             if (JComponent.this.isOpaque()) {
                 states.add(AccessibleState.OPAQUE);
             }
             return states;
         }
 
         /**
          * Returns the number of accessible children in the object.  If all
          * of the children of this object implement Accessible, than this
          * method should return the number of children of this object.
          *
          * @return the number of accessible children in the object.
          */
         public int getAccessibleChildrenCount() {
             return super.getAccessibleChildrenCount();
         }
 
         /**
          * Returns the nth Accessible child of the object.
          *
          * @param i zero-based index of child
          * @return the nth Accessible child of the object
          */
         public Accessible getAccessibleChild(int i) {
             return super.getAccessibleChild(i);
         }
 
         // ----- AccessibleExtendedComponent
 
         /**
          * Returns the AccessibleExtendedComponent
          *
          * @return the AccessibleExtendedComponent
          */
         AccessibleExtendedComponent getAccessibleExtendedComponent() {
             return this;
         }
 
         /**
          * Returns the tool tip text
          *
          * @return the tool tip text, if supported, of the object;
          * otherwise, null
          * @since 1.4
          */
         public String getToolTipText() {
             return JComponent.this.getToolTipText();
         }
 
         /**
          * Returns the titled border text
          *
          * @return the titled border text, if supported, of the object;
          * otherwise, null
          * @since 1.4
          */
         public String getTitledBorderText() {
             Border border = JComponent.this.getBorder();
             if (border instanceof TitledBorder) {
                 return ((TitledBorder)border).getTitle();
             } else {
                 return null;
             }
         }
 
         /**
          * Returns key bindings associated with this object
          *
          * @return the key bindings, if supported, of the object;
          * otherwise, null
          * @see AccessibleKeyBinding
          * @since 1.4
          */
         public AccessibleKeyBinding getAccessibleKeyBinding() {
             return null;
         }
     } // inner class AccessibleJComponent
 
 
     /**
      * Returns an <code>ArrayTable</code> used for
      * key/value "client properties" for this component. If the
      * <code>clientProperties</code> table doesn't exist, an empty one
      * will be created.
      *
      * @return an ArrayTable
      * @see #putClientProperty
      * @see #getClientProperty
      */
     private ArrayTable getClientProperties() {
         if (clientProperties == null) {
             clientProperties = new ArrayTable();
         }
         return clientProperties;
     }
 
 
     /**
      * Returns the value of the property with the specified key.  Only
      * properties added with <code>putClientProperty</code> will return
      * a non-<code>null</code> value.
      *
      * @param key the being queried
      * @return the value of this property or <code>null</code>
      * @see #putClientProperty
      */
     public final Object getClientProperty(Object key) {
         if (key == SwingUtilities2.AA_TEXT_PROPERTY_KEY) {
             return aaTextInfo;
         } else if (key == SwingUtilities2.COMPONENT_UI_PROPERTY_KEY) {
             return ui;
         }
          if(clientProperties == null) {
             return null;
         } else {
             synchronized(clientProperties) {
                 return clientProperties.get(key);
             }
         }
     }
 
     /**
      * Adds an arbitrary key/value "client property" to this component.
      * <p>
      * The <code>get/putClientProperty</code> methods provide access to
      * a small per-instance hashtable. Callers can use get/putClientProperty
      * to annotate components that were created by another module.
      * For example, a
      * layout manager might store per child constraints this way. For example:
      * <pre>
      * componentA.putClientProperty("to the left of", componentB);
      * </pre>
      * If value is <code>null</code> this method will remove the property.
      * Changes to client properties are reported with
      * <code>PropertyChange</code> events.
      * The name of the property (for the sake of PropertyChange
      * events) is <code>key.toString()</code>.
      * <p>
      * The <code>clientProperty</code> dictionary is not intended to
      * support large
      * scale extensions to JComponent nor should be it considered an
      * alternative to subclassing when designing a new component.
      *
      * @param key the new client property key
      * @param value the new client property value; if <code>null</code>
      *          this method will remove the property
      * @see #getClientProperty
      * @see #addPropertyChangeListener
      */
     public final void putClientProperty(Object key, Object value) {
         if (key == SwingUtilities2.AA_TEXT_PROPERTY_KEY) {
             aaTextInfo = value;
             return;
         }
         if (value == null && clientProperties == null) {
             // Both the value and ArrayTable are null, implying we don't
             // have to do anything.
             return;
         }
         ArrayTable clientProperties = getClientProperties();
         Object oldValue;
         synchronized(clientProperties) {
             oldValue = clientProperties.get(key);
             if (value != null) {
                 clientProperties.put(key, value);
             } else if (oldValue != null) {
                 clientProperties.remove(key);
             } else {
                 // old == new == null
                 return;
             }
         }
         clientPropertyChanged(key, oldValue, value);
         firePropertyChange(key.toString(), oldValue, value);
     }
 
     // Invoked from putClientProperty.  This is provided for subclasses
     // in Swing.
     void clientPropertyChanged(Object key, Object oldValue,
                                Object newValue) {
     }
 
 
     /*
      * Sets the property with the specified name to the specified value if
      * the property has not already been set by the client program.
      * This method is used primarily to set UI defaults for properties
      * with primitive types, where the values cannot be marked with
      * UIResource.
      * @see LookAndFeel#installProperty
      * @param propertyName String containing the name of the property
      * @param value Object containing the property value
      */
     void setUIProperty(String propertyName, Object value) {
         if (propertyName == "opaque") {
             if (!getFlag(OPAQUE_SET)) {
                 setOpaque(((Boolean)value).booleanValue());
                 setFlag(OPAQUE_SET, false);
             }
         } else if (propertyName == "autoscrolls") {
             if (!getFlag(AUTOSCROLLS_SET)) {
                 setAutoscrolls(((Boolean)value).booleanValue());
                 setFlag(AUTOSCROLLS_SET, false);
             }
         } else if (propertyName == "focusTraversalKeysForward") {
             if (!getFlag(FOCUS_TRAVERSAL_KEYS_FORWARD_SET)) {
                 super.setFocusTraversalKeys(KeyboardFocusManager.
                                             FORWARD_TRAVERSAL_KEYS,
                                             (Set)value);
             }
         } else if (propertyName == "focusTraversalKeysBackward") {
             if (!getFlag(FOCUS_TRAVERSAL_KEYS_BACKWARD_SET)) {
                 super.setFocusTraversalKeys(KeyboardFocusManager.
                                             BACKWARD_TRAVERSAL_KEYS,
                                             (Set)value);
             }
         } else {
             throw new IllegalArgumentException("property \""+
                                                propertyName+ "\" cannot be set using this method");
         }
     }
 
 
     /**
      * Sets the focus traversal keys for a given traversal operation for this
      * Component.
      * Refer to
      * {@link java.awt.Component#setFocusTraversalKeys}
      * for a complete description of this method.
      *
      * @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 java.awt.KeyboardFocusManager#FORWARD_TRAVERSAL_KEYS
      * @see java.awt.KeyboardFocusManager#BACKWARD_TRAVERSAL_KEYS
      * @see java.awt.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 1.5
      * @beaninfo
      *       bound: true
      */
     public void
         setFocusTraversalKeys(int id, Set<? extends AWTKeyStroke> keystrokes)
     {
         if (id == KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS) {
             setFlag(FOCUS_TRAVERSAL_KEYS_FORWARD_SET,true);
         } else if (id == KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS) {
             setFlag(FOCUS_TRAVERSAL_KEYS_BACKWARD_SET,true);
         }
         super.setFocusTraversalKeys(id,keystrokes);
     }
 
     /* --- Transitional java.awt.Component Support ---
      * The methods and fields in this section will migrate to
      * java.awt.Component in the next JDK release.
      */
 
     /**
      * Returns true if this component is lightweight, that is, if it doesn't
      * have a native window system peer.
      *
      * @return true if this component is lightweight
      */
     public static boolean isLightweightComponent(Component c) {
         return c.getPeer() instanceof LightweightPeer;
     }
 
 
     /**
      * @deprecated As of JDK 5,
      * replaced by <code>Component.setBounds(int, int, int, int)</code>.
      * <p>
      * Moves and resizes this component.
      *
      * @param x  the new horizontal location
      * @param y  the new vertical location
      * @param w  the new width
      * @param h  the new height
      * @see java.awt.Component#setBounds
      */
     @Deprecated
     public void reshape(int x, int y, int w, int h) {
         super.reshape(x, y, w, h);
     }
 
 
     /**
      * Stores the bounds of this component into "return value"
      * <code>rv</code> and returns <code>rv</code>.
      * If <code>rv</code> 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 component's bounds
      * @return <code>rv</code>; if <code>rv</code> is <code>null</code>
      *          return a newly created <code>Rectangle</code> with this
      *          component's bounds
      */
     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"
      * <code>rv</code> and returns <code>rv</code>.
      * If <code>rv</code> 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 component's size
      * @return <code>rv</code>
      */
     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"
      * <code>rv</code> and returns <code>rv</code>.
      * If <code>rv</code> 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 component's location
      * @return <code>rv</code>
      */
     public Point getLocation(Point rv) {
         if (rv == null) {
             return new Point(getX(), getY());
         }
         else {
             rv.setLocation(getX(), getY());
             return rv;
         }
     }
 
 
     /**
      * Returns the current x coordinate of the component's 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 component's origin
      */
     public int getX() { return super.getX(); }
 
 
     /**
      * Returns the current y coordinate of the component's 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 component's origin
      */
     public int getY() { return super.getY(); }
 
 
     /**
      * 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
      */
     public int getWidth() { return super.getWidth(); }
 
 
     /**
      * 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
      */
     public int getHeight() { return super.getHeight(); }
 
     /**
      * Returns true if this component is completely opaque.
      * <p>
      * An opaque component paints every pixel within its
      * rectangular bounds. A non-opaque component paints only a subset of
      * its pixels or none at all, allowing the pixels underneath it to
      * "show through".  Therefore, a component that does not fully paint
      * its pixels 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 #setOpaque
      */
     public boolean isOpaque() {
         return getFlag(IS_OPAQUE);
     }
 
     /**
      * If true the component paints every pixel within its bounds.
      * Otherwise, the component may not paint some or all of its
      * pixels, allowing the underlying pixels to show through.
      * <p>
      * The default value of this property is false for <code>JComponent</code>.
      * However, the default value for this property on most standard
      * <code>JComponent</code> subclasses (such as <code>JButton</code> and
      * <code>JTree</code>) is look-and-feel dependent.
      *
      * @param isOpaque  true if this component should be opaque
      * @see #isOpaque
      * @beaninfo
      *        bound: true
      *       expert: true
      *  description: The component's opacity
      */
     public void setOpaque(boolean isOpaque) {
         boolean oldValue = getFlag(IS_OPAQUE);
         setFlag(IS_OPAQUE, isOpaque);
         setFlag(OPAQUE_SET, true);
         firePropertyChange("opaque", oldValue, isOpaque);
     }
 
 
     /**
      * If the specified rectangle is completely obscured by any of this
      * component's opaque children then returns true.  Only direct children
      * are considered, more distant descendants are ignored.  A
      * <code>JComponent</code> is opaque if
      * <code>JComponent.isOpaque()</code> returns true, other lightweight
      * components are always considered transparent, and heavyweight components
      * are always considered opaque.
      *
      * @param x  x value of specified rectangle
      * @param y  y value of specified rectangle
      * @param width  width of specified rectangle
      * @param height height of specified rectangle
      * @return true if the specified rectangle is obscured by an opaque child
      */
     boolean rectangleIsObscured(int x,int y,int width,int height)
     {
         int numChildren = getComponentCount();
 
         for(int i = 0; i < numChildren; i++) {
             Component child = getComponent(i);
             int cx, cy, cw, ch;
 
             cx = child.getX();
             cy = child.getY();
             cw = child.getWidth();
             ch = child.getHeight();
 
             if (x >= cx && (x + width) <= (cx + cw) &&
                 y >= cy && (y + height) <= (cy + ch) && child.isVisible()) {
 
                 if(child instanceof JComponent) {
 //                  System.out.println("A) checking opaque: " + ((JComponent)child).isOpaque() + "  " + child);
 //                  System.out.print("B) ");
 //                  Thread.dumpStack();
                     return child.isOpaque();
                 } else {
                     /** Sometimes a heavy weight can have a bound larger than its peer size
                      *  so we should always draw under heavy weights
                      */
                     return false;
                 }
             }
         }
 
         return false;
     }
 
 
     /**
      * Returns the <code>Component</code>'s "visible rect rectangle" -  the
      * intersection of the visible rectangles for the component <code>c</code>
      * and all of its ancestors.  The return value is stored in
      * <code>visibleRect</code>.
      *
      * @param c  the component
      * @param visibleRect  a <code>Rectangle</code> computed as the
      *          intersection of all visible rectangles for the component
      *          <code>c</code> and all of its ancestors -- this is the
      *          return value for this method
      * @see #getVisibleRect
      */
     static final void computeVisibleRect(Component c, Rectangle visibleRect) {
         Container p = c.getParent();
         Rectangle bounds = c.getBounds();
 
         if (p == null || p instanceof Window || p instanceof Applet) {
             visibleRect.setBounds(0, 0, bounds.width, bounds.height);
         } else {
             computeVisibleRect(p, visibleRect);
             visibleRect.x -= bounds.x;
             visibleRect.y -= bounds.y;
             SwingUtilities.computeIntersection(0,0,bounds.width,bounds.height,visibleRect);
         }
     }
 
 
     /**
      * Returns the <code>Component</code>'s "visible rect rectangle" -  the
      * intersection of the visible rectangles for this component
      * and all of its ancestors.  The return value is stored in
      * <code>visibleRect</code>.
      *
      * @param visibleRect a <code>Rectangle</code> computed as the
      *          intersection of all visible rectangles for this
      *          component and all of its ancestors -- this is the return
      *          value for this method
      * @see #getVisibleRect
      */
     public void computeVisibleRect(Rectangle visibleRect) {
         computeVisibleRect(this, visibleRect);
     }
 
 
     /**
      * Returns the <code>Component</code>'s "visible rectangle" -  the
      * intersection of this component's visible rectangle,
      * <code>new Rectangle(0, 0, getWidth(), getHeight())</code>,
      * and all of its ancestors' visible rectangles.
      *
      * @return the visible rectangle
      */
     public Rectangle getVisibleRect() {
         Rectangle visibleRect = new Rectangle();
 
         computeVisibleRect(visibleRect);
         return visibleRect;
     }
 
     /**
      * 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
      */
     public void firePropertyChange(String propertyName,
                                    boolean oldValue, boolean newValue) {
         super.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
      */
     public void firePropertyChange(String propertyName,
                                       int oldValue, int newValue) {
         super.firePropertyChange(propertyName, oldValue, newValue);
     }
 
     // XXX This method is implemented as a workaround to a JLS issue with ambiguous
     // methods. This should be removed once 4758654 is resolved.
     public void firePropertyChange(String propertyName, char oldValue, char newValue) {
         super.firePropertyChange(propertyName, oldValue, newValue);
     }
 
     /**
      * Supports reporting constrained property changes.
      * This method can be called when a constrained property has changed
      * and it will send the appropriate <code>PropertyChangeEvent</code>
      * to any registered <code>VetoableChangeListeners</code>.
      *
      * @param propertyName  the name of the property that was listened on
      * @param oldValue  the old value of the property
      * @param newValue  the new value of the property
      * @exception PropertyVetoException when the attempt to set the
      *          property is vetoed by the component
      */
     protected void fireVetoableChange(String propertyName, Object oldValue, Object newValue)
         throws java.beans.PropertyVetoException
     {
         if (vetoableChangeSupport == null) {
             return;
         }
         vetoableChangeSupport.fireVetoableChange(propertyName, oldValue, newValue);
     }
 
 
     /**
      * Adds a <code>VetoableChangeListener</code> to the listener list.
      * The listener is registered for all properties.
      *
      * @param listener  the <code>VetoableChangeListener</code> to be added
      */
     public synchronized void addVetoableChangeListener(VetoableChangeListener listener) {
         if (vetoableChangeSupport == null) {
             vetoableChangeSupport = new java.beans.VetoableChangeSupport(this);
         }
         vetoableChangeSupport.addVetoableChangeListener(listener);
     }
 
 
     /**
      * Removes a <code>VetoableChangeListener</code> from the listener list.
      * This removes a <code>VetoableChangeListener</code> that was registered
      * for all properties.
      *
      * @param listener  the <code>VetoableChangeListener</code> to be removed
      */
     public synchronized void removeVetoableChangeListener(VetoableChangeListener listener) {
         if (vetoableChangeSupport == null) {
             return;
         }
         vetoableChangeSupport.removeVetoableChangeListener(listener);
     }
 
 
     /**
      * Returns an array of all the vetoable change listeners
      * registered on this component.
      *
      * @return all of the component's <code>VetoableChangeListener</code>s
      *         or an empty
      *         array if no vetoable change listeners are currently registered
      *
      * @see #addVetoableChangeListener
      * @see #removeVetoableChangeListener
      *
      * @since 1.4
      */
     public synchronized VetoableChangeListener[] getVetoableChangeListeners() {
         if (vetoableChangeSupport == null) {
             return new VetoableChangeListener[0];
         }
         return vetoableChangeSupport.getVetoableChangeListeners();
     }
 
 
     /**
      * Returns the top-level ancestor of this component (either the
      * containing <code>Window</code> or <code>Applet</code>),
      * or <code>null</code> if this component has not
      * been added to any container.
      *
      * @return the top-level <code>Container</code> that this component is in,
      *          or <code>null</code> if not in any container
      */
     public Container getTopLevelAncestor() {
         for(Container p = this; p != null; p = p.getParent()) {
             if(p instanceof Window || p instanceof Applet) {
                 return p;
             }
         }
         return null;
     }
 
     private AncestorNotifier getAncestorNotifier() {
         return (AncestorNotifier)
             getClientProperty(JComponent_ANCESTOR_NOTIFIER);
     }
 
     /**
      * Registers <code>listener</code> so that it will receive
      * <code>AncestorEvents</code> when it or any of its ancestors
      * move or are made visible or invisible.
      * Events are also sent when the component or its ancestors are added
      * or removed from the containment hierarchy.
      *
      * @param listener  the <code>AncestorListener</code> to register
      * @see AncestorEvent
      */
     public void addAncestorListener(AncestorListener listener) {
         AncestorNotifier ancestorNotifier = getAncestorNotifier();
         if (ancestorNotifier == null) {
             ancestorNotifier = new AncestorNotifier(this);
             putClientProperty(JComponent_ANCESTOR_NOTIFIER,
                               ancestorNotifier);
         }
         ancestorNotifier.addAncestorListener(listener);
     }
 
     /**
      * Unregisters <code>listener</code> so that it will no longer receive
      * <code>AncestorEvents</code>.
      *
      * @param listener  the <code>AncestorListener</code> to be removed
      * @see #addAncestorListener
      */
     public void removeAncestorListener(AncestorListener listener) {
         AncestorNotifier ancestorNotifier = getAncestorNotifier();
         if (ancestorNotifier == null) {
             return;
         }
         ancestorNotifier.removeAncestorListener(listener);
         if (ancestorNotifier.listenerList.getListenerList().length == 0) {
             ancestorNotifier.removeAllListeners();
             putClientProperty(JComponent_ANCESTOR_NOTIFIER, null);
         }
     }
 
     /**
      * Returns an array of all the ancestor listeners
      * registered on this component.
      *
      * @return all of the component's <code>AncestorListener</code>s
      *         or an empty
      *         array if no ancestor listeners are currently registered
      *
      * @see #addAncestorListener
      * @see #removeAncestorListener
      *
      * @since 1.4
      */
     public AncestorListener[] getAncestorListeners() {
         AncestorNotifier ancestorNotifier = getAncestorNotifier();
         if (ancestorNotifier == null) {
             return new AncestorListener[0];
         }
         return ancestorNotifier.getAncestorListeners();
     }
 
     /**
      * Returns an array of all the objects currently registered
      * as <code><em>Foo</em>Listener</code>s
      * upon this <code>JComponent</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>JComponent</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>
      *
      * @since 1.3
      *
      * @see #getVetoableChangeListeners
      * @see #getAncestorListeners
      */
     public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
         T[] result;
         if (listenerType == AncestorListener.class) {
             // AncestorListeners are handled by the AncestorNotifier
             result = (T[])getAncestorListeners();
         }
         else if (listenerType == VetoableChangeListener.class) {
             // VetoableChangeListeners are handled by VetoableChangeSupport
             result = (T[])getVetoableChangeListeners();
         }
         else if (listenerType == PropertyChangeListener.class) {
             // PropertyChangeListeners are handled by PropertyChangeSupport
             result = (T[])getPropertyChangeListeners();
         }
         else {
             result = listenerList.getListeners(listenerType);
         }
 
         if (result.length == 0) {
             return super.getListeners(listenerType);
         }
         return result;
     }
 
     /**
      * Notifies this component that it now has a parent component.
      * When this method is invoked, the chain of parent components is
      * set up with <code>KeyboardAction</code> event listeners.
      * This method is called by the toolkit internally and should
      * not be called directly by programs.
      *
      * @see #registerKeyboardAction
      */
     public void addNotify() {
         super.addNotify();
         firePropertyChange("ancestor", null, getParent());
 
         registerWithKeyboardManager(false);
         registerNextFocusableComponent();
     }
 
 
     /**
      * Notifies this component that it no longer has a parent component.
      * When this method is invoked, any <code>KeyboardAction</code>s
      * set up in the the chain of parent components are removed.
      * This method is called by the toolkit internally and should
      * not be called directly by programs.
      *
      * @see #registerKeyboardAction
      */
     public void removeNotify() {
         super.removeNotify();
         // This isn't strictly correct.  The event shouldn't be
         // fired until *after* the parent is set to null.  But
         // we only get notified before that happens
         firePropertyChange("ancestor", getParent(), null);
 
         unregisterWithKeyboardManager();
         deregisterNextFocusableComponent();
 
         if (getCreatedDoubleBuffer()) {
             RepaintManager.currentManager(this).resetDoubleBuffer();
             setCreatedDoubleBuffer(false);
         }
         if (autoscrolls) {
             Autoscroller.stop(this);
         }
     }
 
 
     /**
      * Adds the specified region to the dirty region list if the component
      * is showing.  The component will be repainted after all of the
      * currently pending events have been dispatched.
      *
      * @param tm  this parameter is not used
      * @param x  the x value of the dirty region
      * @param y  the y value of the dirty region
      * @param width  the width of the dirty region
      * @param height  the height of the dirty region
      * @see #isPaintingOrigin()
      * @see java.awt.Component#isShowing
      * @see RepaintManager#addDirtyRegion
      */
     public void repaint(long tm, int x, int y, int width, int height) {
         RepaintManager.currentManager(this).addDirtyRegion(this, x, y, width, height);
     }
 
 
     /**
      * Adds the specified region to the dirty region list if the component
      * is showing.  The component will be repainted after all of the
      * currently pending events have been dispatched.
      *
      * @param  r a <code>Rectangle</code> containing the dirty region
      * @see #isPaintingOrigin()
      * @see java.awt.Component#isShowing
      * @see RepaintManager#addDirtyRegion
      */
     public void repaint(Rectangle r) {
         repaint(0,r.x,r.y,r.width,r.height);
     }
 
 
     /**
      * Supports deferred automatic layout.
      * <p>
      * Calls <code>invalidate</code> and then adds this component's
      * <code>validateRoot</code> to a list of components that need to be
      * validated.  Validation will occur after all currently pending
      * events have been dispatched.  In other words after this method
      * is called,  the first validateRoot (if any) found when walking
      * up the containment hierarchy of this component will be validated.
      * By default, <code>JRootPane</code>, <code>JScrollPane</code>,
      * and <code>JTextField</code> return true
      * from <code>isValidateRoot</code>.
      * <p>
      * This method will automatically be called on this component
      * when a property value changes such that size, location, or
      * internal layout of this component has been affected.  This automatic
      * updating differs from the AWT because programs generally no
      * longer need to invoke <code>validate</code> to get the contents of the
      * GUI to update.
      * <p>
      *
      * @see java.awt.Component#invalidate
      * @see java.awt.Container#validate
      * @see #isValidateRoot
      * @see RepaintManager#addInvalidComponent
      */
     public void revalidate() {
         if (getParent() == null) {
             // Note: We don't bother invalidating here as once added
             // to a valid parent invalidate will be invoked (addImpl
             // invokes addNotify which will invoke invalidate on the
             // new Component). Also, if we do add a check to isValid
             // here it can potentially be called before the constructor
             // which was causing some people grief.
             return;
         }
         if (SwingUtilities.isEventDispatchThread()) {
             invalidate();
             RepaintManager.currentManager(this).addInvalidComponent(this);
         }
         else {
             // To avoid a flood of Runnables when constructing GUIs off
             // the EDT, a flag is maintained as to whether or not
             // a Runnable has been scheduled.
             synchronized(this) {
                 if (getFlag(REVALIDATE_RUNNABLE_SCHEDULED)) {
                     return;
                 }
                 setFlag(REVALIDATE_RUNNABLE_SCHEDULED, true);
             }
             Runnable callRevalidate = new Runnable() {
                 public void run() {
                     synchronized(JComponent.this) {
                         setFlag(REVALIDATE_RUNNABLE_SCHEDULED, false);
                     }
                     revalidate();
                 }
             };
             SwingUtilities.invokeLater(callRevalidate);
         }
     }
 
     /**
      * If this method returns true, <code>revalidate</code> calls by
      * descendants of this component will cause the entire tree
      * beginning with this root to be validated.
      * Returns false by default.  <code>JScrollPane</code> overrides
      * this method and returns true.
      *
      * @return always returns false
      * @see #revalidate
      * @see java.awt.Component#invalidate
      * @see java.awt.Container#validate
      * @see java.awt.Container#isValidateRoot
      */
     @Override
     public boolean isValidateRoot() {
         return false;
     }
 
 
     /**
      * Returns true if this component tiles its children -- that is, if
      * it can guarantee that the children will not overlap.  The
      * repainting system is substantially more efficient in this
      * common case.  <code>JComponent</code> subclasses that can't make this
      * guarantee, such as <code>JLayeredPane</code>,
      * should override this method to return false.
      *
      * @return always returns true
      */
     public boolean isOptimizedDrawingEnabled() {
         return true;
     }
 
     /**
      * Returns {@code true} if a paint triggered on a child component should cause
      * painting to originate from this Component, or one of its ancestors.
      * <p/>
      * Calling {@link #repaint} or {@link #paintImmediately(int, int, int, int)}
      * on a Swing component will result in calling
      * the {@link JComponent#paintImmediately(int, int, int, int)} method of
      * the first ancestor which {@code isPaintingOrigin()} returns {@code true}, if there are any.
      * <p/>
      * {@code JComponent} subclasses that need to be painted when any of their
      * children are repainted should override this method to return {@code true}.
      *
      * @return always returns {@code false}
      *
      * @see #paintImmediately(int, int, int, int)
      */
     protected boolean isPaintingOrigin() {
         return false;
     }
 
     /**
      * Paints the specified region in this component and all of its
      * descendants that overlap the region, immediately.
      * <p>
      * It's rarely necessary to call this method.  In most cases it's
      * more efficient to call repaint, which defers the actual painting
      * and can collapse redundant requests into a single paint call.
      * This method is useful if one needs to update the display while
      * the current event is being dispatched.
      * <p>
      * This method is to be overridden when the dirty region needs to be changed
      * for components that are painting origins.
      *
      * @param x  the x value of the region to be painted
      * @param y  the y value of the region to be painted
      * @param w  the width of the region to be painted
      * @param h  the height of the region to be painted
      * @see #repaint
      * @see #isPaintingOrigin()
      */
     public void paintImmediately(int x,int y,int w, int h) {
         Component c = this;
         Component parent;
 
         if(!isShowing()) {
             return;
         }
 
         JComponent paintingOigin = SwingUtilities.getPaintingOrigin(this);
         if (paintingOigin != null) {
             Rectangle rectangle = SwingUtilities.convertRectangle(
                     c, new Rectangle(x, y, w, h), paintingOigin);
             paintingOigin.paintImmediately(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
             return;
         }
 
         while(!c.isOpaque()) {
             parent = c.getParent();
             if(parent != null) {
                 x += c.getX();
                 y += c.getY();
                 c = parent;
             } else {
                 break;
             }
 
             if(!(c instanceof JComponent)) {
                 break;
             }
         }
         if(c instanceof JComponent) {
             ((JComponent)c)._paintImmediately(x,y,w,h);
         } else {
             c.repaint(x,y,w,h);
         }
     }
 
     /**
      * Paints the specified region now.
      *
      * @param r a <code>Rectangle</code> containing the region to be painted
      */
     public void paintImmediately(Rectangle r) {
         paintImmediately(r.x,r.y,r.width,r.height);
     }
 
     /**
      * Returns whether this component should be guaranteed to be on top.
      * For example, it would make no sense for <code>Menu</code>s to pop up
      * under another component, so they would always return true.
      * Most components will want to return false, hence that is the default.
      *
      * @return always returns false
      */
     // package private
     boolean alwaysOnTop() {
         return false;
     }
 
     void setPaintingChild(Component paintingChild) {
         this.paintingChild = paintingChild;
     }
 
     void _paintImmediately(int x, int y, int w, int h) {
         Graphics g;
         Container c;
         Rectangle b;
 
         int tmpX, tmpY, tmpWidth, tmpHeight;
         int offsetX=0,offsetY=0;
 
         boolean hasBuffer = false;
 
         JComponent bufferedComponent = null;
         JComponent paintingComponent = this;
 
         RepaintManager repaintManager = RepaintManager.currentManager(this);
         // parent Container's up to Window or Applet. First container is
         // the direct parent. Note that in testing it was faster to
         // alloc a new Vector vs keeping a stack of them around, and gc
         // seemed to have a minimal effect on this.
         java.util.List<Component> path = new java.util.ArrayList<Component>(7);
         int pIndex = -1;
         int pCount = 0;
 
         tmpX = tmpY = tmpWidth = tmpHeight = 0;
 
         Rectangle paintImmediatelyClip = fetchRectangle();
         paintImmediatelyClip.x = x;
         paintImmediatelyClip.y = y;
         paintImmediatelyClip.width = w;
         paintImmediatelyClip.height = h;
 
 
         // System.out.println("1) ************* in _paintImmediately for " + this);
 
         boolean ontop = alwaysOnTop() && isOpaque();
         if (ontop) {
             SwingUtilities.computeIntersection(0, 0, getWidth(), getHeight(),
                                                paintImmediatelyClip);
             if (paintImmediatelyClip.width == 0) {
                 recycleRectangle(paintImmediatelyClip);
                 return;
             }
         }
         Component child;
         for (c = this, child = null;
              c != null && !(c instanceof Window) && !(c instanceof Applet);
              child = c, c = c.getParent()) {
                 JComponent jc = (c instanceof JComponent) ? (JComponent)c :
                                 null;
                 path.add(c);
                 if(!ontop && jc != null && !jc.isOptimizedDrawingEnabled()) {
                     boolean resetPC;
 
                     // Children of c may overlap, three possible cases for the
                     // painting region:
                     // . Completely obscured by an opaque sibling, in which
                     //   case there is no need to paint.
                     // . Partially obscured by a sibling: need to start
                     //   painting from c.
                     // . Otherwise we aren't obscured and thus don't need to
                     //   start painting from parent.
                     if (c != this) {
                         if (jc.isPaintingOrigin()) {
                             resetPC = true;
                         }
                         else {
                             Component[] children = c.getComponents();
                             int i = 0;
                             for (; i<children.length; i++) {
                                 if (children[i] == child) break;
                             }
                             switch (jc.getObscuredState(i,
                                             paintImmediatelyClip.x,
                                             paintImmediatelyClip.y,
                                             paintImmediatelyClip.width,
                                             paintImmediatelyClip.height)) {
                             case NOT_OBSCURED:
                                 resetPC = false;
                                 break;
                             case COMPLETELY_OBSCURED:
                                 recycleRectangle(paintImmediatelyClip);
                                 return;
                             default:
                                 resetPC = true;
                                 break;
                             }
                         }
                     }
                     else {
                         resetPC = false;
                     }
 
                     if (resetPC) {
                         // Get rid of any buffer since we draw from here and
                         // we might draw something larger
                         paintingComponent = jc;
                         pIndex = pCount;
                         offsetX = offsetY = 0;
                         hasBuffer = false;
                     }
                 }
                 pCount++;
 
                 // look to see if the parent (and therefor this component)
                 // is double buffered
                 if(repaintManager.isDoubleBufferingEnabled() && jc != null &&
                                   jc.isDoubleBuffered()) {
                     hasBuffer = true;
                     bufferedComponent = jc;
                 }
 
                 // if we aren't on top, include the parent's clip
                 if (!ontop) {
                     int bx = c.getX();
                     int by = c.getY();
                     tmpWidth = c.getWidth();
                     tmpHeight = c.getHeight();
                     SwingUtilities.computeIntersection(tmpX,tmpY,tmpWidth,tmpHeight,paintImmediatelyClip);
                     paintImmediatelyClip.x += bx;
                     paintImmediatelyClip.y += by;
                     offsetX += bx;
                     offsetY += by;
                 }
         }
 
         // If the clip width or height is negative, don't bother painting
         if(c == null || c.getPeer() == null ||
                         paintImmediatelyClip.width <= 0 ||
                         paintImmediatelyClip.height <= 0) {
             recycleRectangle(paintImmediatelyClip);
             return;
         }
 
         paintingComponent.setFlag(IS_REPAINTING, true);
 
         paintImmediatelyClip.x -= offsetX;
         paintImmediatelyClip.y -= offsetY;
 
         // Notify the Components that are going to be painted of the
         // child component to paint to.
         if(paintingComponent != this) {
             Component comp;
             int i = pIndex;
             for(; i > 0 ; i--) {
                 comp = path.get(i);
                 if(comp instanceof JComponent) {
                     ((JComponent)comp).setPaintingChild(path.get(i-1));
                 }
             }
         }
         try {
             if ((g = safelyGetGraphics(paintingComponent, c)) != null) {
                 try {
                     if (hasBuffer) {
                         RepaintManager rm = RepaintManager.currentManager(
                                 bufferedComponent);
                         rm.beginPaint();
                         try {
                             rm.paint(paintingComponent, bufferedComponent, g,
                                     paintImmediatelyClip.x,
                                     paintImmediatelyClip.y,
                                     paintImmediatelyClip.width,
                                     paintImmediatelyClip.height);
                         } finally {
                             rm.endPaint();
                         }
                     } else {
                         g.setClip(paintImmediatelyClip.x, paintImmediatelyClip.y,
                                 paintImmediatelyClip.width, paintImmediatelyClip.height);
                         paintingComponent.paint(g);
                     }
                 } finally {
                     g.dispose();
                 }
             }
         }
         finally {
             // Reset the painting child for the parent components.
             if(paintingComponent != this) {
                 Component comp;
                 int i = pIndex;
                 for(; i > 0 ; i--) {
                     comp = path.get(i);
                     if(comp instanceof JComponent) {
                         ((JComponent)comp).setPaintingChild(null);
                     }
                 }
             }
             paintingComponent.setFlag(IS_REPAINTING, false);
         }
         recycleRectangle(paintImmediatelyClip);
     }
 
     /**
      * Paints to the specified graphics.  This does not set the clip and it
      * does not adjust the Graphics in anyway, callers must do that first.
      * This method is package-private for RepaintManager.PaintManager and
      * its subclasses to call, it is NOT intended for general use outside
      * of that.
      */
     void paintToOffscreen(Graphics g, int x, int y, int w, int h, int maxX,
                           int maxY) {
         try {
             setFlag(ANCESTOR_USING_BUFFER, true);
             if ((y + h) < maxY || (x + w) < maxX) {
                 setFlag(IS_PAINTING_TILE, true);
             }
             if (getFlag(IS_REPAINTING)) {
                 // Called from paintImmediately (RepaintManager) to fill
                 // repaint request
                 paint(g);
             } else {
                 // Called from paint() (AWT) to repair damage
                 if(!rectangleIsObscured(x, y, w, h)) {
                     paintComponent(g);
                     paintBorder(g);
                 }
                 paintChildren(g);
             }
         } finally {
             setFlag(ANCESTOR_USING_BUFFER, false);
             setFlag(IS_PAINTING_TILE, false);
         }
     }
 
     /**
      * Returns whether or not the region of the specified component is
      * obscured by a sibling.
      *
      * @return NOT_OBSCURED if non of the siblings above the Component obscure
      *         it, COMPLETELY_OBSCURED if one of the siblings completely
      *         obscures the Component or PARTIALLY_OBSCURED if the Comonent is
      *         only partially obscured.
      */
     private int getObscuredState(int compIndex, int x, int y, int width,
                                  int height) {
         int retValue = NOT_OBSCURED;
         Rectangle tmpRect = fetchRectangle();
 
         for (int i = compIndex - 1 ; i >= 0 ; i--) {
             Component sibling = getComponent(i);
             if (!sibling.isVisible()) {
                 continue;
             }
             Rectangle siblingRect;
             boolean opaque;
             if (sibling instanceof JComponent) {
                 opaque = sibling.isOpaque();
                 if (!opaque) {
                     if (retValue == PARTIALLY_OBSCURED) {
                         continue;
                     }
                 }
             }
             else {
                 opaque = true;
             }
             siblingRect = sibling.getBounds(tmpRect);
             if (opaque && x >= siblingRect.x && (x + width) <=
                      (siblingRect.x + siblingRect.width) &&
                      y >= siblingRect.y && (y + height) <=
                      (siblingRect.y + siblingRect.height)) {
                 recycleRectangle(tmpRect);
                 return COMPLETELY_OBSCURED;
             }
             else if (retValue == NOT_OBSCURED &&
                      !((x + width <= siblingRect.x) ||
                        (y + height <= siblingRect.y) ||
                        (x >= siblingRect.x + siblingRect.width) ||
                        (y >= siblingRect.y + siblingRect.height))) {
                 retValue = PARTIALLY_OBSCURED;
             }
         }
         recycleRectangle(tmpRect);
         return retValue;
     }
 
     /**
      * Returns true, which implies that before checking if a child should
      * be painted it is first check that the child is not obscured by another
      * sibling. This is only checked if <code>isOptimizedDrawingEnabled</code>
      * returns false.
      *
      * @return always returns true
      */
     boolean checkIfChildObscuredBySibling() {
         return true;
     }
 
 
     private void setFlag(int aFlag, boolean aValue) {
         if(aValue) {
             flags |= (1 << aFlag);
         } else {
             flags &= ~(1 << aFlag);
         }
     }
     private boolean getFlag(int aFlag) {
         int mask = (1 << aFlag);
         return ((flags & mask) == mask);
     }
     // These functions must be static so that they can be called from
     // subclasses inside the package, but whose inheritance hierarhcy includes
     // classes outside of the package below JComponent (e.g., JTextArea).
     static void setWriteObjCounter(JComponent comp, byte count) {
         comp.flags = (comp.flags & ~(0xFF << WRITE_OBJ_COUNTER_FIRST)) |
                      (count << WRITE_OBJ_COUNTER_FIRST);
     }
     static byte getWriteObjCounter(JComponent comp) {
         return (byte)((comp.flags >> WRITE_OBJ_COUNTER_FIRST) & 0xFF);
     }
 
     /** Buffering **/
 
     /**
      *  Sets whether this component should use a buffer to paint.
      *  If set to true, all the drawing from this component will be done
      *  in an offscreen painting buffer. The offscreen painting buffer will
      *  the be copied onto the screen.
      *  If a <code>Component</code> is buffered and one of its ancestor
      *  is also buffered, the ancestor buffer will be used.
      *
      *  @param aFlag if true, set this component to be double buffered
      */
     public void setDoubleBuffered(boolean aFlag) {
         setFlag(IS_DOUBLE_BUFFERED,aFlag);
     }
 
     /**
      * Returns whether this component should use a buffer to paint.
      *
      * @return true if this component is double buffered, otherwise false
      */
     public boolean isDoubleBuffered() {
         return getFlag(IS_DOUBLE_BUFFERED);
     }
 
     /**
      * Returns the <code>JRootPane</code> ancestor for this component.
      *
      * @return the <code>JRootPane</code> that contains this component,
      *          or <code>null</code> if no <code>JRootPane</code> is found
      */
     public JRootPane getRootPane() {
         return SwingUtilities.getRootPane(this);
     }
 
 
     /** Serialization **/
 
     /**
      * This is called from Component by way of reflection. Do NOT change
      * the name unless you change the code in Component as well.
      */
     void compWriteObjectNotify() {
         byte count = JComponent.getWriteObjCounter(this);
         JComponent.setWriteObjCounter(this, (byte)(count + 1));
         if (count != 0) {
             return;
         }
 
         uninstallUIAndProperties();
 
         /* JTableHeader is in a separate package, which prevents it from
          * being able to override this package-private method the way the
          * other components can.  We don't want to make this method protected
          * because it would introduce public-api for a less-than-desirable
          * serialization scheme, so we compromise with this 'instanceof' hack
          * for now.
          */
         if (getToolTipText() != null ||
             this instanceof javax.swing.table.JTableHeader) {
             ToolTipManager.sharedInstance().unregisterComponent(JComponent.this);
         }
     }
 
     /**
      * This object is the <code>ObjectInputStream</code> callback
      * that's called after a complete graph of objects (including at least
      * one <code>JComponent</code>) has been read.
      *  It sets the UI property of each Swing component
      * that was read to the current default with <code>updateUI</code>.
      * <p>
      * As each  component is read in we keep track of the current set of
      * root components here, in the roots vector.  Note that there's only one
      * <code>ReadObjectCallback</code> per <code>ObjectInputStream</code>,
      * they're stored in the static <code>readObjectCallbacks</code>
      * hashtable.
      *
      * @see java.io.ObjectInputStream#registerValidation
      * @see SwingUtilities#updateComponentTreeUI
      */
     private class ReadObjectCallback implements ObjectInputValidation
     {
         private final Vector<JComponent> roots = new Vector<JComponent>(1);
         private final ObjectInputStream inputStream;
 
         ReadObjectCallback(ObjectInputStream s) throws Exception {
             inputStream = s;
             s.registerValidation(this, 0);
         }
 
         /**
          * This is the method that's called after the entire graph
          * of objects has been read in.  It initializes
          * the UI property of all of the copmonents with
          * <code>SwingUtilities.updateComponentTreeUI</code>.
          */
         public void validateObject() throws InvalidObjectException {
             try {
                 for (JComponent root : roots) {
                     SwingUtilities.updateComponentTreeUI(root);
                 }
             }
             finally {
                 readObjectCallbacks.remove(inputStream);
             }
         }
 
         /**
          * If <code>c</code> isn't a descendant of a component we've already
          * seen, then add it to the roots <code>Vector</code>.
          *
          * @param c the <code>JComponent</code> to add
          */
         private void registerComponent(JComponent c)
         {
             /* If the Component c is a descendant of one of the
              * existing roots (or it IS an existing root), we're done.
              */
             for (JComponent root : roots) {
                 for(Component p = c; p != null; p = p.getParent()) {
                     if (p == root) {
                         return;
                     }
                 }
             }
 
             /* Otherwise: if Component c is an ancestor of any of the
              * existing roots then remove them and add c (the "new root")
              * to the roots vector.
              */
             for(int i = 0; i < roots.size(); i++) {
                 JComponent root = roots.elementAt(i);
                 for(Component p = root.getParent(); p != null; p = p.getParent()) {
                     if (p == c) {
                         roots.removeElementAt(i--); // !!
                         break;
                     }
                 }
             }
 
             roots.addElement(c);
         }
     }
 
 
     /**
      * We use the <code>ObjectInputStream</code> "registerValidation"
      * callback to update the UI for the entire tree of components
      * after they've all been read in.
      *
      * @param s  the <code>ObjectInputStream</code> from which to read
      */
     private void readObject(ObjectInputStream s)
         throws IOException, ClassNotFoundException
     {
         s.defaultReadObject();
 
         /* If there's no ReadObjectCallback for this stream yet, that is, if
          * this is the first call to JComponent.readObject() for this
          * graph of objects, then create a callback and stash it
          * in the readObjectCallbacks table.  Note that the ReadObjectCallback
          * constructor takes care of calling s.registerValidation().
          */
         ReadObjectCallback cb = readObjectCallbacks.get(s);
         if (cb == null) {
             try {
                 readObjectCallbacks.put(s, cb = new ReadObjectCallback(s));
             }
             catch (Exception e) {
                 throw new IOException(e.toString());
             }
         }
         cb.registerComponent(this);
 
         // Read back the client properties.
         int cpCount = s.readInt();
         if (cpCount > 0) {
             clientProperties = new ArrayTable();
             for (int counter = 0; counter < cpCount; counter++) {
                 clientProperties.put(s.readObject(),
                                      s.readObject());
             }
         }
         if (getToolTipText() != null) {
             ToolTipManager.sharedInstance().registerComponent(this);
         }
         setWriteObjCounter(this, (byte)0);
     }
 
 
     /**
      * Before writing a <code>JComponent</code> to an
      * <code>ObjectOutputStream</code> we temporarily uninstall its UI.
      * This is tricky to do because we want to uninstall
      * the UI before any of the <code>JComponent</code>'s children
      * (or its <code>LayoutManager</code> etc.) are written,
      * and we don't want to restore the UI until the most derived
      * <code>JComponent</code> subclass has been been stored.
      *
      * @param s the <code>ObjectOutputStream</code> in which to write
      */
     private void writeObject(ObjectOutputStream s) throws IOException {
         s.defaultWriteObject();
         if (getUIClassID().equals(uiClassID)) {
             byte count = JComponent.getWriteObjCounter(this);
             JComponent.setWriteObjCounter(this, --count);
             if (count == 0 && ui != null) {
                 ui.installUI(this);
             }
         }
         ArrayTable.writeArrayTable(s, clientProperties);
     }
 
 
     /**
      * Returns a string representation of this <code>JComponent</code>.
      * 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 <code>JComponent</code>
      */
     protected String paramString() {
         String preferredSizeString = (isPreferredSizeSet() ?
                                       getPreferredSize().toString() : "");
         String minimumSizeString = (isMinimumSizeSet() ?
                                     getMinimumSize().toString() : "");
         String maximumSizeString = (isMaximumSizeSet() ?
                                     getMaximumSize().toString() : "");
         String borderString = (border == null ? ""
                                : (border == this ? "this" : border.toString()));
 
         return super.paramString() +
         ",alignmentX=" + alignmentX +
         ",alignmentY=" + alignmentY +
         ",border=" + borderString +
         ",flags=" + flags +             // should beef this up a bit
         ",maximumSize=" + maximumSizeString +
         ",minimumSize=" + minimumSizeString +
         ",preferredSize=" + preferredSizeString;
     }
 
 }