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.BasicPanelUI; 31 import java.awt.*; 32 import java.beans.*; 33 34 /** 35 * Provides the Synth L&F UI delegate for 36 * {@link javax.swing.JPanel}. 37 * 38 * @author Steve Wilson 39 * @since 1.7 40 */ 41 public class SynthPanelUI extends BasicPanelUI 42 implements PropertyChangeListener, SynthUI { 43 private SynthStyle style; 44 45 /** 46 * Creates a new UI object for the given component. 47 * 48 * @param c component to create UI object for 49 * @return the UI object 50 */ 51 public static ComponentUI createUI(JComponent c) { 52 return new SynthPanelUI(); 53 } 54 55 /** 56 * @inheritDoc 57 */ 58 @Override 59 public void installUI(JComponent c) { 60 JPanel p = (JPanel)c; 61 62 super.installUI(c); 63 installListeners(p); 64 } 65 66 /** 67 * @inheritDoc 68 */ 69 @Override 70 public void uninstallUI(JComponent c) { 71 JPanel p = (JPanel)c; 72 73 uninstallListeners(p); 74 super.uninstallUI(c); 75 } 76 77 /** 78 * Installs listeners into the panel. 79 * 80 * @param p the {@code JPanel} object 81 */ 82 protected void installListeners(JPanel p) { 83 p.addPropertyChangeListener(this); 84 } 85 86 /** 87 * Uninstalls listeners from the panel. 88 * 89 * @param p the {@code JPanel} object 90 */ 91 protected void uninstallListeners(JPanel p) { 92 p.removePropertyChangeListener(this); 93 } 94 95 /** 96 * @inheritDoc 97 */ 98 @Override 99 protected void installDefaults(JPanel p) { 100 updateStyle(p); 101 } 102 103 /** 104 * @inheritDoc 105 */ 106 @Override 107 protected void uninstallDefaults(JPanel p) { 108 SynthContext context = getContext(p, ENABLED); 109 110 style.uninstallDefaults(context); 111 context.dispose(); 112 style = null; 113 } 114 115 private void updateStyle(JPanel c) { 116 SynthContext context = getContext(c, ENABLED); 117 style = SynthLookAndFeel.updateStyle(context, this); 118 context.dispose(); 119 } 120 121 /** 122 * @inheritDoc 123 */ 124 @Override 125 public SynthContext getContext(JComponent c) { 126 return getContext(c, getComponentState(c)); 127 } 128 129 private SynthContext getContext(JComponent c, int state) { 130 return SynthContext.getContext(SynthContext.class, c, 131 SynthLookAndFeel.getRegion(c), style, state); 132 } 133 134 private int getComponentState(JComponent c) { 135 return SynthLookAndFeel.getComponentState(c); 136 } 137 138 /** 139 * Notifies this UI delegate to repaint the specified component. 140 * This method paints the component background, then calls 141 * the {@link #paint(SynthContext,Graphics)} method. 142 * 143 * <p>In general, this method does not need to be overridden by subclasses. 144 * All Look and Feel rendering code should reside in the {@code paint} method. 145 * 146 * @param g the {@code Graphics} object used for painting 147 * @param c the component being painted 148 * @see #paint(SynthContext,Graphics) 149 */ 150 @Override 151 public void update(Graphics g, JComponent c) { 152 SynthContext context = getContext(c); 153 154 SynthLookAndFeel.update(context, g); 155 context.getPainter().paintPanelBackground(context, 156 g, 0, 0, c.getWidth(), c.getHeight()); 157 paint(context, g); 158 context.dispose(); 159 } 160 161 /** 162 * Paints the specified component according to the Look and Feel. 163 * <p>This method is not used by Synth Look and Feel. 164 * Painting is handled by the {@link #paint(SynthContext,Graphics)} method. 165 * 166 * @param g the {@code Graphics} object used for painting 167 * @param c the component being painted 168 * @see #paint(SynthContext,Graphics) 169 */ 170 @Override 171 public void paint(Graphics g, JComponent c) { 172 SynthContext context = getContext(c); 173 174 paint(context, g); 175 context.dispose(); 176 } 177 178 /** 179 * Paints the specified component. This implementation does nothing. 180 * 181 * @param context context for the component being painted 182 * @param g the {@code Graphics} object used for painting 183 * @see #update(Graphics,JComponent) 184 */ 185 protected void paint(SynthContext context, Graphics g) { 186 // do actual painting 187 } 188 189 /** 190 * @inheritDoc 191 */ 192 @Override 193 public void paintBorder(SynthContext context, Graphics g, int x, 194 int y, int w, int h) { 195 context.getPainter().paintPanelBorder(context, g, x, y, w, h); 196 } 197 198 /** 199 * @inheritDoc 200 */ 201 @Override 202 public void propertyChange(PropertyChangeEvent pce) { 203 if (SynthLookAndFeel.shouldUpdateStyle(pce)) { 204 updateStyle((JPanel)pce.getSource()); 205 } 206 } 207 }