01: /*
02: * Copyright (c) 2001-2007 JGoodies Karsten Lentzsch. All Rights Reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * o Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: *
10: * o Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * o Neither the name of JGoodies Karsten Lentzsch nor the names of
15: * its contributors may be used to endorse or promote products derived
16: * from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20: * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
27: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28: * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: package com.jgoodies.looks.common;
32:
33: import java.awt.Container;
34:
35: import javax.swing.BoxLayout;
36: import javax.swing.JPopupMenu;
37: import javax.swing.plaf.UIResource;
38:
39: /**
40: * The JGoodies implementation of a layout manager for Popup menus.
41: * In comparison to the JDK's implementation it flushes the values of the client
42: * properties <code>maxTextWidth</code> and <code>maxAccWidth</code> in
43: * the method {@link #invalidateLayout(Container)} and not in the method
44: * {@link #preferredLayoutSize(Container)}.
45: *
46: * @author Andrej Golovnin
47: * @version $Revision: 1.2 $
48: */
49: public final class PopupMenuLayout extends BoxLayout implements
50: UIResource {
51:
52: /**
53: * Creates a layout manager that will lay out components along
54: * the given axis.
55: *
56: * @param target the container that needs to be laid out
57: * @param axis the axis to lay out components along
58: */
59: public PopupMenuLayout(Container target, int axis) {
60: super (target, axis);
61: }
62:
63: /**
64: * Indicates that a child has changed its layout related information,
65: * and thus any cached calculations should be flushed.
66: * <p>
67: * In case the target is an instance of JPopupMenu it flushes the values of
68: * the client properties <code>maxTextWidth</code> and <code>maxAccWidth</code>.
69: *
70: * @param target the affected container
71: */
72: public synchronized void invalidateLayout(Container target) {
73: if (target instanceof JPopupMenu) {
74: JPopupMenu menu = (JPopupMenu) target;
75: menu.putClientProperty(MenuItemRenderer.MAX_TEXT_WIDTH,
76: null);
77: menu
78: .putClientProperty(MenuItemRenderer.MAX_ACC_WIDTH,
79: null);
80: }
81: super.invalidateLayout(target);
82: }
83:
84: }
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