01 /*
02 * Copyright 2002-2006 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package javax.swing.plaf.synth;
27
28 import javax.swing.*;
29 import javax.swing.plaf.UIResource;
30
31 import java.awt.Container;
32 import java.awt.Dimension;
33
34 /**
35 * The default layout manager for Popup menus and menubars. This
36 * class is an extension of BoxLayout which adds the UIResource tag
37 * so that plauggable L&Fs can distinguish it from user-installed
38 * layout managers on menus.
39 *
40 * Derived from javax.swing.plaf.basic.DefaultMenuLayout
41 *
42 * @version 1.16 05/05/07
43 * @author Georges Saab
44 */
45
46 class DefaultMenuLayout extends BoxLayout implements UIResource {
47 public DefaultMenuLayout(Container target, int axis) {
48 super (target, axis);
49 }
50
51 public void invalidateLayout(Container target) {
52 if (target instanceof JPopupMenu) {
53 SynthPopupMenuUI popupUI = (SynthPopupMenuUI) ((JPopupMenu) target)
54 .getUI();
55 popupUI.resetAlignmentHints();
56 }
57 super .invalidateLayout(target);
58 }
59
60 public Dimension preferredLayoutSize(Container target) {
61 if (target instanceof JPopupMenu
62 && target.getComponentCount() == 0) {
63 return new Dimension(0, 0);
64 }
65 return super.preferredLayoutSize(target);
66 }
67 }
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