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Java > Open Source Codes > org > netbeans > modules > refactoring > spi > impl > UndoAction


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19
20 package org.netbeans.modules.refactoring.spi.impl;
21
22 import java.beans.PropertyChangeEvent JavaDoc;
23 import java.beans.PropertyChangeListener JavaDoc;
24 import javax.swing.Action JavaDoc;
25 import javax.swing.SwingUtilities JavaDoc;
26 import org.openide.util.HelpCtx;
27 import org.openide.util.NbBundle;
28 import org.openide.util.actions.CallableSystemAction;
29
30 public class UndoAction extends CallableSystemAction implements PropertyChangeListener JavaDoc {
31
32     private UndoManager undoManager;
33
34     public UndoAction() {
35         putValue(Action.NAME, getString("LBL_Undo")); //NOI18N
36 putValue("noIconInMenu", Boolean.TRUE); // NOI18N
37 undoManager = UndoManager.getDefault();
38         undoManager.addPropertyChangeListener(this);
39         updateState();
40     }
41     
42     public void propertyChange (PropertyChangeEvent JavaDoc event) {
43         updateState();
44     }
45     
46     private void updateState() {
47         String JavaDoc desc = undoManager.getUndoDescription();
48         String JavaDoc name = getString("LBL_Undo"); //NOI18N
49 if (desc != null) {
50             name += " [" + desc + "]"; //NOI18N
51 }
52
53         final String JavaDoc n = name;
54         Runnable JavaDoc r = new Runnable JavaDoc() {
55             public void run() {
56                 setEnabled(undoManager.isUndoAvailable());
57                 putValue(Action.NAME, n);
58             }
59         };
60
61         if (SwingUtilities.isEventDispatchThread()) {
62             r.run();
63         } else {
64             SwingUtilities.invokeLater(r);
65         }
66     }
67     
68     private static final String JavaDoc getString(String JavaDoc key) {
69         return NbBundle.getMessage(UndoAction.class, key);
70     }
71     
72     public void performAction() {
73         undoManager.undo();
74         undoManager.saveAll();
75     }
76     
77     public org.openide.util.HelpCtx getHelpCtx() {
78         return HelpCtx.DEFAULT_HELP;
79     }
80     
81     public String JavaDoc getName() {
82         return (String JavaDoc) getValue(Action.NAME);
83     }
84
85     protected boolean asynchronous() {
86         return true;
87     }
88 }
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