1/*
2 * Copyright (c) 2002, 2013, 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 */
25package javax.swing.plaf.synth;
26
27import javax.swing.*;
28import java.awt.Graphics;
29import java.beans.PropertyChangeEvent;
30import java.beans.PropertyChangeListener;
31import javax.swing.plaf.*;
32import javax.swing.plaf.basic.*;
33
34/**
35 * Provides the Synth L&F UI delegate for
36 * {@link javax.swing.JMenuBar}.
37 *
38 * @author Scott Violet
39 * @since 1.7
40 */
41public class SynthMenuBarUI extends BasicMenuBarUI
42                            implements PropertyChangeListener, SynthUI {
43    private SynthStyle style;
44
45    /**
46     * Creates a new UI object for the given component.
47     *
48     * @param x component to create UI object for
49     * @return the UI object
50     */
51    public static ComponentUI createUI(JComponent x) {
52        return new SynthMenuBarUI();
53    }
54
55    /**
56     * {@inheritDoc}
57     */
58    @Override
59    protected void installDefaults() {
60        if (menuBar.getLayout() == null ||
61            menuBar.getLayout() instanceof UIResource) {
62            menuBar.setLayout(new SynthMenuLayout(menuBar,BoxLayout.LINE_AXIS));
63        }
64        updateStyle(menuBar);
65    }
66
67    /**
68     * {@inheritDoc}
69     */
70    @Override
71    protected void installListeners() {
72        super.installListeners();
73        menuBar.addPropertyChangeListener(this);
74    }
75
76    private void updateStyle(JMenuBar c) {
77        SynthContext context = getContext(c, ENABLED);
78        SynthStyle oldStyle = style;
79        style = SynthLookAndFeel.updateStyle(context, this);
80        if (style != oldStyle) {
81            if (oldStyle != null) {
82                uninstallKeyboardActions();
83                installKeyboardActions();
84            }
85        }
86    }
87
88    /**
89     * {@inheritDoc}
90     */
91    @Override
92    protected void uninstallDefaults() {
93        SynthContext context = getContext(menuBar, ENABLED);
94
95        style.uninstallDefaults(context);
96        style = null;
97    }
98
99    /**
100     * {@inheritDoc}
101     */
102    @Override
103    protected void uninstallListeners() {
104        super.uninstallListeners();
105        menuBar.removePropertyChangeListener(this);
106    }
107
108    /**
109     * {@inheritDoc}
110     */
111    @Override
112    public SynthContext getContext(JComponent c) {
113        return getContext(c, getComponentState(c));
114    }
115
116    private SynthContext getContext(JComponent c, int state) {
117        return SynthContext.getContext(c, style, state);
118    }
119
120    private int getComponentState(JComponent c) {
121        return SynthLookAndFeel.getComponentState(c);
122    }
123
124    /**
125     * Notifies this UI delegate to repaint the specified component.
126     * This method paints the component background, then calls
127     * the {@link #paint(SynthContext,Graphics)} method.
128     *
129     * <p>In general, this method does not need to be overridden by subclasses.
130     * All Look and Feel rendering code should reside in the {@code paint} method.
131     *
132     * @param g the {@code Graphics} object used for painting
133     * @param c the component being painted
134     * @see #paint(SynthContext,Graphics)
135     */
136    @Override
137    public void update(Graphics g, JComponent c) {
138        SynthContext context = getContext(c);
139
140        SynthLookAndFeel.update(context, g);
141        context.getPainter().paintMenuBarBackground(context,
142                          g, 0, 0, c.getWidth(), c.getHeight());
143        paint(context, g);
144    }
145
146    /**
147     * Paints the specified component according to the Look and Feel.
148     * <p>This method is not used by Synth Look and Feel.
149     * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.
150     *
151     * @param g the {@code Graphics} object used for painting
152     * @param c the component being painted
153     * @see #paint(SynthContext,Graphics)
154     */
155    @Override
156    public void paint(Graphics g, JComponent c) {
157        SynthContext context = getContext(c);
158
159        paint(context, g);
160    }
161
162    /**
163     * Paints the specified component. This implementation does nothing.
164     *
165     * @param context context for the component being painted
166     * @param g the {@code Graphics} object used for painting
167     * @see #update(Graphics,JComponent)
168     */
169    protected void paint(SynthContext context, Graphics g) {
170    }
171
172    /**
173     * {@inheritDoc}
174     */
175    @Override
176    public void paintBorder(SynthContext context, Graphics g, int x,
177                            int y, int w, int h) {
178        context.getPainter().paintMenuBarBorder(context, g, x, y, w, h);
179    }
180
181    /**
182     * {@inheritDoc}
183     */
184    @Override
185    public void propertyChange(PropertyChangeEvent e) {
186        if (SynthLookAndFeel.shouldUpdateStyle(e)) {
187            updateStyle((JMenuBar)e.getSource());
188        }
189    }
190}
191