1 /*
2
3 dsh-identify Lightweight components for identifiable beans.
4 Copyright (c) 2003-2019 held jointly by the individual authors.
5
6 This library is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 3 of the License, or (at
9 your option) any later version.
10
11 This library is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
14 License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with this library; if not, write to the Free Software Foundation,
18 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19
20 > http://www.fsf.org/licensing/licenses/lgpl.html
21 > http://www.opensource.org/licenses/lgpl-license.php
22
23 */
24 package org.dishevelled.identify;
25
26 import java.awt.event.MouseAdapter;
27 import java.awt.event.MouseEvent;
28 import java.awt.event.MouseListener;
29
30 import javax.swing.ImageIcon;
31 import javax.swing.JButton;
32 import javax.swing.JPopupMenu;
33
34 /**
35 * Context menu button.
36 *
37 * @author Michael Heuer
38 */
39 public final class ContextMenuButton
40 extends JButton
41 {
42 /** Context menu. */
43 private final JPopupMenu contextMenu;
44
45 /** Mouse listener. */
46 private final MouseListener listener = new MouseAdapter()
47 {
48 @Override
49 public void mousePressed(final MouseEvent event)
50 {
51 contextMenu.show(event.getComponent(), 0, event.getComponent().getHeight());
52 }
53 };
54
55 /** Default image icon. */
56 private static final ImageIcon DEFAULT_ICON = new ImageIcon(ContextMenuButton.class.getResource("context-menu.png"));
57
58 /** GTK look and feel image icon. */
59 private static final ImageIcon GTK_ICON = new ImageIcon(ContextMenuButton.class.getResource("context-menu-gtk.png"));
60
61
62 /**
63 * Create a new context menu button with the specified context menu.
64 *
65 * @param contextMenu context menu, must not be null
66 */
67 public ContextMenuButton(final JPopupMenu contextMenu)
68 {
69 super();
70 if (contextMenu == null)
71 {
72 throw new IllegalArgumentException("contextMenu must not be null");
73 }
74 this.contextMenu = contextMenu;
75 setIcon(IdentifyUtils.isGTKLookAndFeel() ? GTK_ICON : DEFAULT_ICON);
76 setToolTipText("View menu");
77 addMouseListener(listener);
78 }
79
80
81 /**
82 * Release the resources consumed by this context menu button so that it may eventually be garbage collected.
83 */
84 public void dispose()
85 {
86 removeMouseListener(listener);
87 }
88 }