HierarchyBoundsListener


1   /*
2    * @(#)HierarchyBoundsListener.java 1.7 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package java.awt.event;
9   
10  import java.util.EventListener  ;
11  
12  /**
13   * The listener interface for receiving ancestor moved and resized events.
14   * The class that is interested in processing these events either implements
15   * this interface (and all the methods it contains) or extends the abstract
16   * <code>HierarchyBoundsAdapter</code> class (overriding only the method of
17   * interest).
18   * The listener object created from that class is then registered with a
19   * Component using the Component's <code>addHierarchyBoundsListener</code> 
20   * method. When the hierarchy to which the Component belongs changes by
21   * the resizing or movement of an ancestor, the relevant method in the listener
22   * object is invoked, and the <code>HierarchyEvent</code> is passed to it.
23   * <p>
24   * Hierarchy events are provided for notification purposes ONLY;
25   * The AWT will automatically handle changes to the hierarchy internally so
26   * that GUI layout works properly regardless of whether a
27   * program registers an <code>HierarchyBoundsListener</code> or not.
28   *
29   * @author  David Mendenhall
30   * @version 1.7, 12/19/03
31   * @see     HierarchyBoundsAdapter
32   * @see     HierarchyEvent
33   * @since   1.3
34   */
35  public interface HierarchyBoundsListener extends EventListener   {
36      /**
37       * Called when an ancestor of the source is moved.
38       */
39      public void ancestorMoved(HierarchyEvent   e);
40  
41      /**
42       * Called when an ancestor of the source is resized.
43       */
44      public void ancestorResized(HierarchyEvent   e);
45  }
46
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