001/* BasicRadioButtonUI.java 002 Copyright (C) 2002, 2004, 2006, Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package javax.swing.plaf.basic; 040 041import java.awt.Color; 042import java.awt.Dimension; 043import java.awt.Font; 044import java.awt.Graphics; 045import java.awt.Insets; 046import java.awt.Rectangle; 047 048import javax.swing.AbstractButton; 049import javax.swing.ButtonModel; 050import javax.swing.Icon; 051import javax.swing.JComponent; 052import javax.swing.SwingUtilities; 053import javax.swing.UIManager; 054import javax.swing.plaf.ComponentUI; 055import javax.swing.text.View; 056 057/** 058 * The BasicLookAndFeel UI implementation for 059 * {@link javax.swing.JRadioButton}s. 060 */ 061public class BasicRadioButtonUI extends BasicToggleButtonUI 062{ 063 /** 064 * The default icon for JRadioButtons. The default icon displays the usual 065 * RadioButton and is sensible to the selection state of the button, 066 * and can be used both as normal icon as well as selectedIcon. 067 */ 068 protected Icon icon; 069 070 /** 071 * Creates and returns a new instance of <code>BasicRadioButtonUI</code>. 072 * 073 * @return a new instance of <code>BasicRadioButtonUI</code> 074 */ 075 public static ComponentUI createUI(final JComponent c) 076 { 077 return new BasicRadioButtonUI(); 078 } 079 080 /** 081 * Creates a new instance of <code>BasicButtonUI</code>. 082 */ 083 public BasicRadioButtonUI() 084 { 085 // nothing to do 086 } 087 088 /** 089 * Installs defaults from the Look & Feel table on the specified 090 * button. 091 * 092 * @param b the button on which to install the defaults 093 */ 094 protected void installDefaults(AbstractButton b) 095 { 096 super.installDefaults(b); 097 icon = UIManager.getIcon(getPropertyPrefix() + "icon"); 098 } 099 100 /** 101 * Returns the prefix used for UIDefaults properties. This is 102 * <code>RadioButton</code> in this case. 103 * 104 * @return the prefix used for UIDefaults properties 105 */ 106 protected String getPropertyPrefix() 107 { 108 return "RadioButton."; 109 } 110 111 /** 112 * Returns the default icon for JRadioButtons. 113 * The default icon displays the usual 114 * RadioButton and is sensible to the selection state of the button, 115 * and can be used both as normal icon as well as selectedIcon. 116 * 117 * @return the default icon for JRadioButtons 118 */ 119 public Icon getDefaultIcon() 120 { 121 return icon; 122 } 123 124 /** 125 * Paints the RadioButton. 126 * 127 * @param g the Graphics context to paint with 128 * @param c the button to paint 129 */ 130 public void paint(Graphics g, JComponent c) 131 { 132 AbstractButton b = (AbstractButton) c; 133 Dimension size = c.getSize(); 134 Insets i = b.getInsets(); 135 textR.x = 0; 136 textR.y = 0; 137 textR.width = 0; 138 textR.height = 0; 139 iconR.x = 0; 140 iconR.y = 0; 141 iconR.width = 0; 142 iconR.height = 0; 143 viewR.x = i.left; 144 viewR.y = i.right; 145 viewR.width = size.width - i.left - i.right; 146 viewR.height = size.height - i.top - i.bottom; 147 148 Font f = c.getFont(); 149 150 g.setFont(f); 151 152 // This is the icon that we use for layout. 153 Icon icon = b.getIcon(); 154 if (icon == null) 155 icon = getDefaultIcon(); 156 157 // Figure out the correct icon. 158 Icon currentIcon = getCurrentIcon(b); 159 160 // Do the layout. 161 String text = SwingUtilities.layoutCompoundLabel(c, g.getFontMetrics(f), 162 b.getText(), currentIcon == null ? getDefaultIcon() : currentIcon, 163 b.getVerticalAlignment(), b.getHorizontalAlignment(), 164 b.getVerticalTextPosition(), b.getHorizontalTextPosition(), 165 viewR, iconR, textR, b.getIconTextGap()); 166 167 // .. and paint it. 168 if (currentIcon != null) 169 currentIcon.paintIcon(c, g, iconR.x, iconR.y); 170 171 // Paint text and focus indicator. 172 if (text != null) 173 { 174 // Maybe render HTML in the radio button. 175 View v = (View) c.getClientProperty(BasicHTML.propertyKey); 176 if (v != null) 177 v.paint(g, textR); 178 else 179 paintText(g, b, textR, text); 180 181 // Paint focus indicator if necessary. 182 if (b.hasFocus() && b.isFocusPainted() 183 && textR.width > 0 && textR.height > 0) 184 paintFocus(g, textR, size); 185 } 186 } 187 188 /** 189 * Determines the icon to be displayed for the specified radio button. 190 * 191 * @param b the radio button 192 * 193 * @return the icon 194 */ 195 private Icon getCurrentIcon(AbstractButton b) 196 { 197 ButtonModel m = b.getModel(); 198 Icon currentIcon = b.getIcon(); 199 200 if (currentIcon == null) 201 { 202 currentIcon = getDefaultIcon(); 203 } 204 else 205 { 206 if (! m.isEnabled()) 207 { 208 if (m.isSelected()) 209 currentIcon = b.getDisabledSelectedIcon(); 210 else 211 currentIcon = b.getDisabledIcon(); 212 } 213 else if (m.isPressed() && m.isArmed()) 214 { 215 currentIcon = b.getPressedIcon(); 216 if (currentIcon == null) 217 currentIcon = b.getSelectedIcon(); 218 } 219 else if (m.isSelected()) 220 { 221 if (b.isRolloverEnabled() && m.isRollover()) 222 { 223 currentIcon = b.getRolloverSelectedIcon(); 224 if (currentIcon == null) 225 currentIcon = b.getSelectedIcon(); 226 } 227 else 228 currentIcon = b.getSelectedIcon(); 229 } 230 else if (b.isRolloverEnabled() && m.isRollover()) 231 { 232 currentIcon = b.getRolloverIcon(); 233 } 234 if (currentIcon == null) 235 currentIcon = b.getIcon(); 236 } 237 return currentIcon; 238 } 239 240 public Dimension getPreferredSize(JComponent c) 241 { 242 // This is basically the same code as in 243 // BasicGraphicsUtils.getPreferredButtonSize() but takes the default icon 244 // property into account. JRadioButton and subclasses always have an icon: 245 // the check box. If the user explicitly changes it with setIcon() that 246 // one will be used for layout calculations and painting instead. 247 // The other icon properties are ignored. 248 AbstractButton b = (AbstractButton) c; 249 250 Insets insets = b.getInsets(); 251 252 String text = b.getText(); 253 Icon i = b.getIcon(); 254 if (i == null) 255 i = getDefaultIcon(); 256 257 textR.x = 0; 258 textR.y = 0; 259 textR.width = 0; 260 textR.height = 0; 261 iconR.x = 0; 262 iconR.y = 0; 263 iconR.width = 0; 264 iconR.height = 0; 265 viewR.x = 0; 266 viewR.y = 0; 267 viewR.width = Short.MAX_VALUE; 268 viewR.height = Short.MAX_VALUE; 269 270 SwingUtilities.layoutCompoundLabel(b, // for the component orientation 271 b.getFontMetrics(b.getFont()), 272 text, i, b.getVerticalAlignment(), 273 b.getHorizontalAlignment(), 274 b.getVerticalTextPosition(), 275 b.getHorizontalTextPosition(), 276 viewR, iconR, textR, 277 text == null ? 0 : b.getIconTextGap()); 278 279 Rectangle r = SwingUtilities.computeUnion(textR.x, textR.y, textR.width, 280 textR.height, iconR); 281 282 return new Dimension(insets.left + r.width + insets.right, 283 insets.top + r.height + insets.bottom); 284 } 285 286 /** 287 * Paints the focus indicator for JRadioButtons. 288 * 289 * @param g the graphics context 290 * @param tr the rectangle for the text label 291 * @param size the size of the <code>JRadioButton</code> component. 292 */ 293 protected void paintFocus(Graphics g, Rectangle tr, Dimension size) 294 { 295 Color focusColor = UIManager.getColor(getPropertyPrefix() + ".focus"); 296 Color saved = g.getColor(); 297 g.setColor(focusColor); 298 g.drawRect(tr.x, tr.y, tr.width, tr.height); 299 g.setColor(saved); 300 } 301}