MouseMotionAdapter


1   /*
2    * @(#)MouseMotionAdapter.java  1.15 03/12/19
3    *
4    * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
5    * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6    */
7   
8   package java.awt.event;
9   
10  /**
11   * An abstract adapter class for receiving mouse motion events.
12   * The methods in this class are empty. This class exists as
13   * convenience for creating listener objects.
14   * <P>
15   * Mouse motion events occur when a mouse is moved or dragged.
16   * (Many such events will be generated in a normal program.
17   * To track clicks and other mouse events, use the MouseAdapter.)
18   * <P>
19   * Extend this class to create a <code>MouseEvent</code> listener 
20   * and override the methods for the events of interest. (If you implement the 
21   * <code>MouseMotionListener</code> interface, you have to define all of
22   * the methods in it. This abstract class defines null methods for them
23   * all, so you can only have to define methods for events you care about.)
24   * <P>
25   * Create a listener object using the extended class and then register it with 
26   * a component using the component's <code>addMouseMotionListener</code> 
27   * method. When the mouse is moved or dragged, the relevant method in the 
28   * listener object is invoked and the <code>MouseEvent</code> is passed to it.
29   *
30   * @author Amy Fowler
31   * @version 1.15 12/19/03
32   *
33   * @see MouseEvent
34   * @see MouseMotionListener
35   * @see <a HREF="http://java.sun.com/docs/books/tutorial/post1.0/ui/mousemotionlistener.html">Tutorial: Writing a Mouse Motion Listener</a>
36   * @see <a HREF="http://www.awl.com/cp/javaseries/jcl1_2.html">Reference: The Java Class Libraries (update file)</a>
37   *
38   * @since 1.1
39   */
40  public abstract class MouseMotionAdapter implements MouseMotionListener   {
41      /**
42       * Invoked when a mouse button is pressed on a component and then 
43       * dragged.  Mouse drag events will continue to be delivered to
44       * the component where the first originated until the mouse button is
45       * released (regardless of whether the mouse position is within the
46       * bounds of the component).
47       */
48      public void mouseDragged(MouseEvent   e) {}
49  
50      /**
51       * Invoked when the mouse button has been moved on a component
52       * (with no buttons no down).
53       */
54      public void mouseMoved(MouseEvent   e) {}
55  }
56
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