001 /*
002 * Copyright 2002-2003 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package javax.swing.plaf.synth;
027
028 import java.awt.*;
029 import java.beans.*;
030 import javax.swing.*;
031 import javax.swing.border.*;
032 import javax.swing.plaf.*;
033 import java.awt.*;
034 import java.awt.event.*;
035 import sun.swing.plaf.synth.SynthUI;
036
037 /**
038 * Synth's ViewportUI.
039 *
040 * @version 1.18, 05/05/07
041 */
042 class SynthViewportUI extends ViewportUI implements
043 PropertyChangeListener, SynthUI {
044 private SynthStyle style;
045
046 public static ComponentUI createUI(JComponent c) {
047 return new SynthViewportUI();
048 }
049
050 public void installUI(JComponent c) {
051 super .installUI(c);
052 installDefaults(c);
053 installListeners(c);
054 }
055
056 public void uninstallUI(JComponent c) {
057 super .uninstallUI(c);
058 uninstallListeners(c);
059 uninstallDefaults(c);
060 }
061
062 protected void installDefaults(JComponent c) {
063 updateStyle(c);
064 }
065
066 private void updateStyle(JComponent c) {
067 SynthContext context = getContext(c, ENABLED);
068
069 // Note: JViewport is special cased as it does not allow for
070 // a border to be set. JViewport.setBorder is overriden to throw
071 // an IllegalArgumentException. Refer to SynthScrollPaneUI for
072 // details of this.
073 SynthStyle newStyle = SynthLookAndFeel.getStyle(context
074 .getComponent(), context.getRegion());
075 SynthStyle oldStyle = context.getStyle();
076
077 if (newStyle != oldStyle) {
078 if (oldStyle != null) {
079 oldStyle.uninstallDefaults(context);
080 }
081 context.setStyle(newStyle);
082 newStyle.installDefaults(context);
083 }
084 this .style = newStyle;
085 context.dispose();
086 }
087
088 protected void installListeners(JComponent c) {
089 c.addPropertyChangeListener(this );
090 }
091
092 protected void uninstallListeners(JComponent c) {
093 c.removePropertyChangeListener(this );
094 }
095
096 protected void uninstallDefaults(JComponent c) {
097 SynthContext context = getContext(c, ENABLED);
098 style.uninstallDefaults(context);
099 context.dispose();
100 style = null;
101 }
102
103 public SynthContext getContext(JComponent c) {
104 return getContext(c, getComponentState(c));
105 }
106
107 private SynthContext getContext(JComponent c, int state) {
108 return SynthContext.getContext(SynthContext.class, c,
109 getRegion(c), style, state);
110 }
111
112 private Region getRegion(JComponent c) {
113 return SynthLookAndFeel.getRegion(c);
114 }
115
116 private int getComponentState(JComponent c) {
117 return SynthLookAndFeel.getComponentState(c);
118 }
119
120 public void update(Graphics g, JComponent c) {
121 SynthContext context = getContext(c);
122
123 SynthLookAndFeel.update(context, g);
124 context.getPainter().paintViewportBackground(context, g, 0, 0,
125 c.getWidth(), c.getHeight());
126 paint(context, g);
127 context.dispose();
128 }
129
130 public void paintBorder(SynthContext context, Graphics g, int x,
131 int y, int w, int h) {
132 // This does nothing on purpose, JViewport doesn't allow a border
133 // and therefor this will NEVER be called.
134 }
135
136 public void paint(Graphics g, JComponent c) {
137 SynthContext context = getContext(c);
138
139 paint(context, g);
140 context.dispose();
141 }
142
143 protected void paint(SynthContext context, Graphics g) {
144 }
145
146 public void propertyChange(PropertyChangeEvent e) {
147 if (SynthLookAndFeel.shouldUpdateStyle(e)) {
148 updateStyle((JComponent) e.getSource());
149 }
150 }
151 }
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