1 /*
2 * Copyright 1996-2006 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 window events.
30 * The methods in this class are empty. This class exists as
31 * convenience for creating listener objects.
32 * <P>
33 * Extend this class to create a <code>WindowEvent</code> listener
34 * and override the methods for the events of interest. (If you implement the
35 * <code>WindowListener</code> interface, you have to define all of
36 * the methods in it. This abstract class defines null methods for them
37 * all, so you can only have to define methods for events you care about.)
38 * <P>
39 * Create a listener object using the extended class and then register it with
40 * a Window using the window's <code>addWindowListener</code>
41 * method. When the window's status changes by virtue of being opened,
42 * closed, activated or deactivated, iconified or deiconified,
43 * the relevant method in the listener
44 * object is invoked, and the <code>WindowEvent</code> is passed to it.
45 *
46 * @see WindowEvent
47 * @see WindowListener
48 * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/windowlistener.html">Tutorial: Writing a Window Listener</a>
49 *
50 * @author Carl Quinn
51 * @author Amy Fowler
52 * @author David Mendenhall
53 * @since 1.1
54 */
55 public abstract class WindowAdapter
56 implements WindowListener, WindowStateListener, WindowFocusListener
57 {
58 /**
59 * Invoked when a window has been opened.
60 */
61 public void windowOpened(WindowEvent e) {}
62
63 /**
64 * Invoked when a window is in the process of being closed.
65 * The close operation can be overridden at this point.
66 */
67 public void windowClosing(WindowEvent e) {}
68
69 /**
70 * Invoked when a window has been closed.
71 */
72 public void windowClosed(WindowEvent e) {}
73
74 /**
75 * Invoked when a window is iconified.
76 */
77 public void windowIconified(WindowEvent e) {}
78
79 /**
80 * Invoked when a window is de-iconified.
81 */
82 public void windowDeiconified(WindowEvent e) {}
83
84 /**
85 * Invoked when a window is activated.
86 */
87 public void windowActivated(WindowEvent e) {}
88
89 /**
90 * Invoked when a window is de-activated.
91 */
92 public void windowDeactivated(WindowEvent e) {}
93
94 /**
95 * Invoked when a window state is changed.
96 * @since 1.4
97 */
98 public void windowStateChanged(WindowEvent e) {}
99
100 /**
101 * Invoked when the Window is set to be the focused Window, which means
102 * that the Window, or one of its subcomponents, will receive keyboard
103 * events.
104 *
105 * @since 1.4
106 */
107 public void windowGainedFocus(WindowEvent e) {}
108
109 /**
110 * Invoked when the Window is no longer the focused Window, which means
111 * that keyboard events will no longer be delivered to the Window or any of
112 * its subcomponents.
113 *
114 * @since 1.4
115 */
116 public void windowLostFocus(WindowEvent e) {}
117 }
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