1. /*

  2.  * @(#)HierarchyBoundsAdapter.java	1.4 00/02/02

  3.  *

  4.  * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.

  5.  * 

  6.  * This software is the proprietary information of Sun Microsystems, Inc.  

  7.  * Use is subject to license terms.

  8.  * 

  9.  */

  10. 

  11. package java.awt.event;

  12. 

  13. /**

  14.  * An abstract adapter class for receiving ancestor moved and resized events.

  15.  * The methods in this class are empty. This class exists as a

  16.  * convenience for creating listener objects.

  17.  * <p>

  18.  * Extend this class and override the method for the event of interest. (If

  19.  * you implement the <code>HierarchyBoundsListener</code> interface, you have

  20.  * to define both methods in it. This abstract class defines null methods for

  21.  * them both, so you only have to define the method for the event you care

  22.  * about.)

  23.  * <p>

  24.  * Create a listener object using your class and then register it with a

  25.  * Component using the Component's <code>addHierarchyBoundsListener</code> 

  26.  * method. When the hierarchy to which the Component belongs changes by

  27.  * resize or movement of an ancestor, the relevant method in the listener

  28.  * object is invoked, and the <code>HierarchyEvent</code> is passed to it.

  29.  *

  30.  * @author	David Mendenhall

  31.  * @version	1.4, 02/02/00

  32.  * @see		HierarchyBoundsListener

  33.  * @see		HierarchyEvent

  34.  * @since 	1.3

  35.  */

  36. public abstract class HierarchyBoundsAdapter implements HierarchyBoundsListener

  37. {

  38.     /**

  39.      * Called when an ancestor of the source is moved.

  40.      */

  41.     public void ancestorMoved(HierarchyEvent e) {}

  42. 

  43.     /**

  44.      * Called when an ancestor of the source is resized.

  45.      */

  46.     public void ancestorResized(HierarchyEvent e) {}

  47. }