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 mouse motion events.
30 * The methods in this class are empty. This class exists as
31 * convenience for creating listener objects.
32 * <P>
33 * Mouse motion events occur when a mouse is moved or dragged.
34 * (Many such events will be generated in a normal program.
35 * To track clicks and other mouse events, use the MouseAdapter.)
36 * <P>
37 * Extend this class to create a <code>MouseEvent</code> listener
38 * and override the methods for the events of interest. (If you implement the
39 * <code>MouseMotionListener</code> interface, you have to define all of
40 * the methods in it. This abstract class defines null methods for them
41 * all, so you can only have to define methods for events you care about.)
42 * <P>
43 * Create a listener object using the extended class and then register it with
44 * a component using the component's <code>addMouseMotionListener</code>
45 * method. When the mouse is moved or dragged, the relevant method in the
46 * listener object is invoked and the <code>MouseEvent</code> is passed to it.
47 *
48 * @author Amy Fowler
49 *
50 * @see MouseEvent
51 * @see MouseMotionListener
52 * @see <a href="http://java.sun.com/docs/books/tutorial/post1.0/ui/mousemotionlistener.html">Tutorial: Writing a Mouse Motion Listener</a>
53 *
54 * @since 1.1
55 */
56 public abstract class MouseMotionAdapter implements MouseMotionListener {
57 /**
58 * Invoked when a mouse button is pressed on a component and then
59 * dragged. Mouse drag events will continue to be delivered to
60 * the component where the first originated until the mouse button is
61 * released (regardless of whether the mouse position is within the
62 * bounds of the component).
63 */
64 public void mouseDragged(MouseEvent e) {}
65
66 /**
67 * Invoked when the mouse button has been moved on a component
68 * (with no buttons no down).
69 */
70 public void mouseMoved(MouseEvent e) {}
71 }
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