AWTEventListenerProxy


1   /*
2    * @(#)AWTEventListenerProxy.java   1.6 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  import java.util.EventListenerProxy  ;
11  import java.awt.AWTEvent  ;
12  import java.awt.event.AWTEventListener  ;
13  
14  /**
15   * A class which extends the <code>EventListenerProxy</code>, specifically 
16   * for adding an <code>AWTEventListener</code> for a specific event mask.
17   * Instances of this class can be added as <code>AWTEventListener</code>s to
18   * a Toolkit object. 
19   * <p>
20   * The <code>getAWTEventListeners</code> method of Toolkit can 
21   * return a mixture of <code>AWTEventListener</code> and
22   * <code>AWTEventListenerProxy</code> objects.
23   * 
24   * @see java.awt.Toolkit
25   * @see java.util.EventListenerProxy
26   * @since 1.4
27   */
28  public class AWTEventListenerProxy extends java.util.EventListenerProxy  
29          implements AWTEventListener   {
30  
31      private long eventMask;
32  
33      /**
34       * Constructor which binds the AWTEventListener to a specific
35       * event mask.
36       * 
37       * @param listener The listener object
38       * @param eventMask The bitmap of event types to receive
39       */ 
40      public AWTEventListenerProxy (long eventMask, 
41              AWTEventListener   listener) {
42          super(listener);
43          this.eventMask = eventMask;
44      }
45  
46      /**
47       * Forwards the property change event to the listener delegate.
48       *
49       * @param evt the property change event
50       */
51      public void eventDispatched(AWTEvent   evt) {
52          ((AWTEventListener  )getListener()).eventDispatched(evt);
53      }
54  
55      /**
56       * Returns the event mask associated with the
57       * listener.
58       */
59      public long getEventMask() {
60          return eventMask;
61      }
62  }
63
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