1 /*
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * 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.metal;
27
28 import java.awt;
29 import javax.swing;
30 import javax.swing.plaf.ComponentUI;
31 import javax.swing.plaf.UIResource;
32 import javax.swing.plaf.basic;
33
34 /**
35 * Metal implementation of <code>MenuBarUI</code>. This class is responsible
36 * for providing the metal look and feel for <code>JMenuBar</code>s.
37 *
38 * @see javax.swing.plaf.MenuBarUI
39 * @since 1.5
40 */
41 public class MetalMenuBarUI extends BasicMenuBarUI {
42 /**
43 * Creates the <code>ComponentUI</code> implementation for the passed
44 * in component.
45 *
46 * @param x JComponent to create the ComponentUI implementation for
47 * @return ComponentUI implementation for <code>x</code>
48 * @throws NullPointerException if <code>x</code> is null
49 */
50 public static ComponentUI createUI(JComponent x) {
51 if (x == null) {
52 throw new NullPointerException("Must pass in a non-null component");
53 }
54 return new MetalMenuBarUI();
55 }
56
57 /**
58 * Configures the specified component appropriate for the metal look and
59 * feel.
60 *
61 * @param c the component where this UI delegate is being installed
62 * @throws NullPointerException if <code>c</code> is null.
63 */
64 public void installUI(JComponent c) {
65 super.installUI(c);
66 MetalToolBarUI.register(c);
67 }
68
69 /**
70 * Reverses configuration which was done on the specified component during
71 * <code>installUI</code>.
72 *
73 * @param c the component where this UI delegate is being installed
74 * @throws NullPointerException if <code>c</code> is null.
75 */
76 public void uninstallUI(JComponent c) {
77 super.uninstallUI(c);
78 MetalToolBarUI.unregister(c);
79 }
80
81 /**
82 * If necessary paints the background of the component, then
83 * invokes <code>paint</code>.
84 *
85 * @param g Graphics to paint to
86 * @param c JComponent painting on
87 * @throws NullPointerException if <code>g</code> or <code>c</code> is
88 * null
89 * @see javax.swing.plaf.ComponentUI#update
90 * @see javax.swing.plaf.ComponentUI#paint
91 * @since 1.5
92 */
93 public void update(Graphics g, JComponent c) {
94 boolean isOpaque = c.isOpaque();
95 if (g == null) {
96 throw new NullPointerException("Graphics must be non-null");
97 }
98 if (isOpaque && (c.getBackground() instanceof UIResource) &&
99 UIManager.get("MenuBar.gradient") != null) {
100 if (MetalToolBarUI.doesMenuBarBorderToolBar((JMenuBar)c)) {
101 JToolBar tb = (JToolBar)MetalToolBarUI.
102 findRegisteredComponentOfType(c, JToolBar.class);
103 if (tb.isOpaque() &&tb.getBackground() instanceof UIResource) {
104 MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
105 c.getWidth(), c.getHeight() +
106 tb.getHeight(), true);
107 paint(g, c);
108 return;
109 }
110 }
111 MetalUtils.drawGradient(c, g, "MenuBar.gradient", 0, 0,
112 c.getWidth(), c.getHeight(),true);
113 paint(g, c);
114 }
115 else {
116 super.update(g, c);
117 }
118 }
119 }
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