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 /**
29 * An abstract adapter class for receiving ancestor moved and resized events.
30 * The methods in this class are empty. This class exists as a
31 * convenience for creating listener objects.
32 * <p>
33 * Extend this class and override the method for the event of interest. (If
34 * you implement the <code>HierarchyBoundsListener</code> interface, you have
35 * to define both methods in it. This abstract class defines null methods for
36 * them both, so you only have to define the method for the event you care
37 * about.)
38 * <p>
39 * Create a listener object using your class and then register it with a
40 * Component using the Component's <code>addHierarchyBoundsListener</code>
41 * method. When the hierarchy to which the Component belongs changes by
42 * resize or movement of an ancestor, the relevant method in the listener
43 * object is invoked, and the <code>HierarchyEvent</code> is passed to it.
44 *
45 * @author David Mendenhall
46 * @see HierarchyBoundsListener
47 * @see HierarchyEvent
48 * @since 1.3
49 */
50 public abstract class HierarchyBoundsAdapter implements HierarchyBoundsListener
51 {
52 /**
53 * Called when an ancestor of the source is moved.
54 */
55 public void ancestorMoved(HierarchyEvent e) {}
56
57 /**
58 * Called when an ancestor of the source is resized.
59 */
60 public void ancestorResized(HierarchyEvent e) {}
61 }
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