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Java > Open Source Codes > org > netbeans > modules > tasklist > usertasks > actions > UTViewAction


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.tasklist.usertasks.actions;
21
22 import javax.swing.AbstractAction JavaDoc;
23 import javax.swing.event.ListSelectionListener JavaDoc;
24 import javax.swing.tree.TreePath JavaDoc;
25 import org.netbeans.modules.tasklist.usertasks.UserTaskTreeTableNode;
26 import org.netbeans.modules.tasklist.usertasks.UserTaskView;
27 import org.netbeans.modules.tasklist.usertasks.model.UserTask;
28
29 /**
30  * An action that is aware of selected nodes in a UserTaskView.
31  *
32  * @author tl
33  */
34 public abstract class UTViewAction extends AbstractAction JavaDoc implements
35 ListSelectionListener JavaDoc {
36     /** view for this action */
37     protected UserTaskView utv;
38     
39     /**
40      * Constructor.
41      *
42      * @param utv a user task view.
43      * @param name Action.NAME
44      */
45     public UTViewAction(UserTaskView utv, String JavaDoc name) {
46         super(name);
47         putValue(AbstractAction.SHORT_DESCRIPTION, name);
48         this.utv = utv;
49         utv.getTreeTable().getSelectionModel().addListSelectionListener(this);
50         this.valueChanged(null);
51     }
52     
53     /**
54      * Returns the selected task. If more than one task is selected returns null.
55      *
56      * @return selected task or null
57      */
58     protected UserTask getSingleSelectedTask() {
59         TreePath JavaDoc[] tp = utv.getTreeTable().getSelectedPaths();
60         
61         // tp[0] is sometimes null if "Expand All" is called...
62 if (tp.length == 1 && tp[0] != null) {
63             Object JavaDoc last = tp[0].getLastPathComponent();
64             if (last instanceof UserTaskTreeTableNode) {
65                 return ((UserTaskTreeTableNode) last).getUserTask();
66             }
67         }
68         return null;
69     }
70 }
71
72
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