1 /*
2 * Copyright 1999 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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 }
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