1. /*

  2.  * @(#)HierarchyBoundsListener.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. import java.util.EventListener;

  14. 

  15. /**

  16.  * The listener interface for receiving ancestor moved and resized events.

  17.  * The class that is interested in processing these events either implements

  18.  * this interface (and all the methods it contains) or extends the abstract

  19.  * <code>HierarchyBoundsAdapter</code> class (overriding only the method of

  20.  * interest).

  21.  * The listener object created from that class is then registered with a

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

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

  24.  * the resizing or movement of an ancestor, the relevant method in the listener

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

  26.  * <p>

  27.  * Hierarchy events are provided for notification purposes ONLY;

  28.  * The AWT will automatically handle changes to the hierarchy internally so

  29.  * that GUI layout works properly regardless of whether a

  30.  * program registers an <code>HierarchyBoundsListener</code> or not.

  31.  *

  32.  * @author	David Mendenhall

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

  34.  * @see		HierarchyBoundsAdapter

  35.  * @see		HierarchyEvent

  36.  * @since 	1.3

  37.  */

  38. public interface HierarchyBoundsListener extends EventListener {

  39.     /**

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

  41.      */

  42.     public void ancestorMoved(HierarchyEvent e);

  43. 

  44.     /**

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

  46.      */

  47.     public void ancestorResized(HierarchyEvent e);

  48. }