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1   /*
2    * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package java.awt.event;
27  
28  import java.util.EventListener;
29  
30  /**
31   * The listener interface for receiving ancestor moved and resized events.
32   * The class that is interested in processing these events either implements
33   * this interface (and all the methods it contains) or extends the abstract
34   * <code>HierarchyBoundsAdapter</code> class (overriding only the method of
35   * interest).
36   * The listener object created from that class is then registered with a
37   * Component using the Component's <code>addHierarchyBoundsListener</code>
38   * method. When the hierarchy to which the Component belongs changes by
39   * the resizing or movement of an ancestor, the relevant method in the listener
40   * object is invoked, and the <code>HierarchyEvent</code> is passed to it.
41   * <p>
42   * Hierarchy events are provided for notification purposes ONLY;
43   * The AWT will automatically handle changes to the hierarchy internally so
44   * that GUI layout works properly regardless of whether a
45   * program registers an <code>HierarchyBoundsListener</code> or not.
46   *
47   * @author      David Mendenhall
48   * @see         HierarchyBoundsAdapter
49   * @see         HierarchyEvent
50   * @since       1.3
51   */
52  public interface HierarchyBoundsListener extends EventListener {
53      /**
54       * Called when an ancestor of the source is moved.
55       */
56      public void ancestorMoved(HierarchyEvent e);
57  
58      /**
59       * Called when an ancestor of the source is resized.
60       */
61      public void ancestorResized(HierarchyEvent e);
62  }