1 /*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package javax.swing.plaf.synth;
27
28 import javax.swing.*;
29 import javax.swing.plaf.*;
30 import javax.swing.plaf.basic.*;
31 import java.awt.Graphics;
32 import java.beans.PropertyChangeListener;
33 import java.beans.PropertyChangeEvent;
34
35 /**
36 * Provides the Synth L&F UI delegate for
37 * {@link javax.swing.JPopupMenu}.
38 *
39 * @author Georges Saab
40 * @author David Karlton
41 * @author Arnaud Weber
42 * @since 1.7
43 */
44 public class SynthPopupMenuUI extends BasicPopupMenuUI
45 implements PropertyChangeListener, SynthUI {
46 private SynthStyle style;
47
48 /**
49 * Creates a new UI object for the given component.
50 *
51 * @param x component to create UI object for
52 * @return the UI object
53 */
54 public static ComponentUI createUI(JComponent x) {
55 return new SynthPopupMenuUI();
56 }
57
58 /**
59 * @inheritDoc
60 */
61 @Override
62 public void installDefaults() {
63 if (popupMenu.getLayout() == null ||
64 popupMenu.getLayout() instanceof UIResource) {
65 popupMenu.setLayout(new SynthMenuLayout(popupMenu, BoxLayout.Y_AXIS));
66 }
67 updateStyle(popupMenu);
68 }
69
70 private void updateStyle(JComponent c) {
71 SynthContext context = getContext(c, ENABLED);
72 SynthStyle oldStyle = style;
73 style = SynthLookAndFeel.updateStyle(context, this);
74 if (style != oldStyle) {
75 if (oldStyle != null) {
76 uninstallKeyboardActions();
77 installKeyboardActions();
78 }
79 }
80 context.dispose();
81 }
82
83 /**
84 * @inheritDoc
85 */
86 @Override
87 protected void installListeners() {
88 super.installListeners();
89 popupMenu.addPropertyChangeListener(this);
90 }
91
92 /**
93 * @inheritDoc
94 */
95 @Override
96 protected void uninstallDefaults() {
97 SynthContext context = getContext(popupMenu, ENABLED);
98
99 style.uninstallDefaults(context);
100 context.dispose();
101 style = null;
102
103 if (popupMenu.getLayout() instanceof UIResource) {
104 popupMenu.setLayout(null);
105 }
106 }
107
108 /**
109 * @inheritDoc
110 */
111 @Override
112 protected void uninstallListeners() {
113 super.uninstallListeners();
114 popupMenu.removePropertyChangeListener(this);
115 }
116
117 /**
118 * @inheritDoc
119 */
120 @Override
121 public SynthContext getContext(JComponent c) {
122 return getContext(c, getComponentState(c));
123 }
124
125 private SynthContext getContext(JComponent c, int state) {
126 return SynthContext.getContext(SynthContext.class, c,
127 SynthLookAndFeel.getRegion(c), style, state);
128 }
129
130 private int getComponentState(JComponent c) {
131 return SynthLookAndFeel.getComponentState(c);
132 }
133
134 /**
135 * Notifies this UI delegate to repaint the specified component.
136 * This method paints the component background, then calls
137 * the {@link #paint(SynthContext,Graphics)} method.
138 *
139 * <p>In general, this method does not need to be overridden by subclasses.
140 * All Look and Feel rendering code should reside in the {@code paint} method.
141 *
142 * @param g the {@code Graphics} object used for painting
143 * @param c the component being painted
144 * @see #paint(SynthContext,Graphics)
145 */
146 @Override
147 public void update(Graphics g, JComponent c) {
148 SynthContext context = getContext(c);
149
150 SynthLookAndFeel.update(context, g);
151 context.getPainter().paintPopupMenuBackground(context,
152 g, 0, 0, c.getWidth(), c.getHeight());
153 paint(context, g);
154 context.dispose();
155 }
156
157 /**
158 * Paints the specified component according to the Look and Feel.
159 * <p>This method is not used by Synth Look and Feel.
160 * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.
161 *
162 * @param g the {@code Graphics} object used for painting
163 * @param c the component being painted
164 * @see #paint(SynthContext,Graphics)
165 */
166 @Override
167 public void paint(Graphics g, JComponent c) {
168 SynthContext context = getContext(c);
169
170 paint(context, g);
171 context.dispose();
172 }
173
174 /**
175 * Paints the specified component. This implementation does nothing.
176 *
177 * @param context context for the component being painted
178 * @param g the {@code Graphics} object used for painting
179 * @see #update(Graphics,JComponent)
180 */
181 protected void paint(SynthContext context, Graphics g) {
182 }
183
184 /**
185 * @inheritDoc
186 */
187 @Override
188 public void paintBorder(SynthContext context, Graphics g, int x,
189 int y, int w, int h) {
190 context.getPainter().paintPopupMenuBorder(context, g, x, y, w, h);
191 }
192
193 /**
194 * @inheritDoc
195 */
196 @Override
197 public void propertyChange(PropertyChangeEvent e) {
198 if (SynthLookAndFeel.shouldUpdateStyle(e)) {
199 updateStyle(popupMenu);
200 }
201 }
202 }