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Java > Open Source Codes > org > netbeans > modules > tasklist > timerwin > AlwaysOnTop


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.timerwin;
21
22 import java.awt.Window JavaDoc;
23 import java.lang.reflect.Method JavaDoc;
24 import javax.swing.JDialog JavaDoc;
25
26 /**
27  * "Always on top" attribute for dialogs.
28  *
29  * @author tl
30  */
31 public class AlwaysOnTop {
32     private static boolean libLoaded;
33     private static Method JavaDoc setAlwaysOnTopMethod;
34
35     static {
36         try {
37             setAlwaysOnTopMethod = Window JavaDoc.class.getDeclaredMethod(
38                     "setAlwaysOnTop", // NOI18N
39 new Class JavaDoc[] {Boolean.TYPE});
40         } catch (Throwable JavaDoc t) {
41             // ignore
42 }
43         
44         if (setAlwaysOnTopMethod == null) {
45             try {
46                 System.loadLibrary("alwaysontop"); // NOI18N
47 libLoaded = true;
48             } catch (Throwable JavaDoc t) {
49                 libLoaded = false;
50             }
51         }
52     }
53     
54     /**
55      * Sets the "always on top" attribute for a dialog.
56      * Works on JDK 5.0 or Win32.
57      *
58      * @param d a dialog
59      * @return true = success
60      */
61     public static boolean setAlwaysOnTop(JDialog JavaDoc d) {
62         if (setAlwaysOnTopMethod != null) {
63             try {
64                 setAlwaysOnTopMethod.invoke(d, new Object JavaDoc[] {Boolean.TRUE});
65                 return true;
66             } catch (Throwable JavaDoc ex) {
67                 // ignore
68 }
69         }
70         if (libLoaded) {
71             return setAlwaysOnTopWin32(d);
72         }
73         
74         return false;
75     }
76     
77     /**
78      * Sets the "always on top" attribute for a dialog on win32
79      *
80      * @param d a dialog
81      * @return true = success
82      */
83     private static native boolean setAlwaysOnTopWin32(JDialog JavaDoc d);
84 }
85
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