ToggleActionPropertyChangeListener


1   /*
2    * $Id: ToggleActionPropertyChangeListener.java,v 1.1.1.1 2004/06/16 01:43:39 davidson1 Exp $
3    *
4    * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
5    * Santa Clara, California 95054, U.S.A. All rights reserved.
6    */
7   
8   /**
9    * @(#)ToggleActionPropertyChangeListener.java  1.5 02/10/07
10   *
11   * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
12   *
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14   * without modification, are permitted provided that the following
15   * conditions are met:
16   * 
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18   * notice, this list of conditions and the following disclaimer.
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20   * - Redistribution in binary form must reproduce the above
21   * copyright notice, this list of conditions and the following
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25   * Neither the name of Sun Microsystems, Inc. or the names of
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48  
49  package org.jdesktop.swing.actions;
50  
51  import java.beans.PropertyChangeListener  ;
52  import java.beans.PropertyChangeEvent  ;
53  
54  import javax.swing.AbstractButton  ;
55  
56  /**
57   * Added to the Toggle type buttons and menu items so that various components
58   * which have been created from a single StateChangeAction can be in synch
59   */
60  class ToggleActionPropertyChangeListener implements PropertyChangeListener   {
61  
62      // XXX - Should be a WeakRef since it's unreachable! 
63      // this is a potential memory leak but we don't really have to
64      // worry about it since the most of the time the buttons will be
65      // loaded for the lifetime of the application. Should make it
66      // weak referenced for a general purpose toolkit.
67      private AbstractButton   button; 
68  
69      public ToggleActionPropertyChangeListener(AbstractButton   button) {
70      this.button = button;
71      }
72  
73      public void propertyChange(PropertyChangeEvent   evt) {
74      String   propertyName = evt.getPropertyName();
75  
76      if (propertyName.equals("selected")) {
77          Boolean   selected = (Boolean  )evt.getNewValue();
78          button.setSelected(selected.booleanValue());
79      }
80      }
81  }
82
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