1 /* 2 * Copyright (c) 1997, 2018, 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.basic; 27 28 import sun.swing.DefaultLookup; 29 import sun.swing.UIAction; 30 import java.awt.*; 31 import java.awt.event.*; 32 import java.beans.*; 33 import javax.swing.*; 34 import javax.swing.event.*; 35 import javax.swing.plaf.ActionMapUIResource; 36 import javax.swing.plaf.ButtonUI; 37 import javax.swing.plaf.ComponentInputMapUIResource; 38 39 /** 40 * Button Listener 41 * 42 * @author Jeff Dinkins 43 * @author Arnaud Weber (keyboard UI support) 44 */ 45 46 public class BasicButtonListener implements MouseListener, MouseMotionListener, 47 FocusListener, ChangeListener, PropertyChangeListener 48 { 49 private long lastPressedTimestamp = -1; 50 private boolean shouldDiscardRelease = false; 51 52 /** 53 * Populates Buttons actions. 54 */ 55 static void loadActionMap(LazyActionMap map) { 56 map.put(new Actions(Actions.PRESS)); 57 map.put(new Actions(Actions.RELEASE)); 58 } 59 60 61 /** 62 * Constructs a new instance of {@code BasicButtonListener}. 63 * 64 * @param b an abstract button 65 */ 66 public BasicButtonListener(AbstractButton b) { 67 } 68 69 public void propertyChange(PropertyChangeEvent e) { 70 String prop = e.getPropertyName(); 71 if(prop == AbstractButton.MNEMONIC_CHANGED_PROPERTY) { 72 updateMnemonicBinding((AbstractButton)e.getSource()); 73 } 74 else if(prop == AbstractButton.CONTENT_AREA_FILLED_CHANGED_PROPERTY) { 75 checkOpacity((AbstractButton) e.getSource() ); 76 } 77 else if(prop == AbstractButton.TEXT_CHANGED_PROPERTY || "font" == prop 78 || "foreground" == prop || "graphicsConfiguration" == prop) { 79 AbstractButton b = (AbstractButton) e.getSource(); 80 BasicHTML.updateRenderer(b, b.getText()); 81 } 82 } 83 84 /** 85 * Checks the opacity of the {@code AbstractButton}. 86 * 87 * @param b an abstract button 88 */ 89 protected void checkOpacity(AbstractButton b) { 90 b.setOpaque( b.isContentAreaFilled() ); 91 } 92 93 /** 94 * Register default key actions: pressing space to "click" a 95 * button and registering the keyboard mnemonic (if any). 96 * 97 * @param c a component 98 */ 99 public void installKeyboardActions(JComponent c) { 100 AbstractButton b = (AbstractButton)c; 101 // Update the mnemonic binding. 102 updateMnemonicBinding(b); 103 104 LazyActionMap.installLazyActionMap(c, BasicButtonListener.class, 105 "Button.actionMap"); 106 107 InputMap km = getInputMap(JComponent.WHEN_FOCUSED, c); 108 109 SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_FOCUSED, km); 110 } 111 112 /** 113 * Unregister default key actions. 114 * 115 * @param c a component 116 */ 117 public void uninstallKeyboardActions(JComponent c) { 118 SwingUtilities.replaceUIInputMap(c, JComponent. 119 WHEN_IN_FOCUSED_WINDOW, null); 120 SwingUtilities.replaceUIInputMap(c, JComponent.WHEN_FOCUSED, null); 121 SwingUtilities.replaceUIActionMap(c, null); 122 } 123 124 /** 125 * Returns the InputMap for condition <code>condition</code>. Called as 126 * part of <code>installKeyboardActions</code>. 127 */ 128 InputMap getInputMap(int condition, JComponent c) { 129 if (condition == JComponent.WHEN_FOCUSED) { 130 BasicButtonUI ui = (BasicButtonUI)BasicLookAndFeel.getUIOfType( 131 ((AbstractButton)c).getUI(), BasicButtonUI.class); 132 if (ui != null) { 133 return (InputMap)DefaultLookup.get( 134 c, ui, ui.getPropertyPrefix() + "focusInputMap"); 135 } 136 } 137 return null; 138 } 139 140 /** 141 * Resets the binding for the mnemonic in the WHEN_IN_FOCUSED_WINDOW 142 * UI InputMap. 143 */ 144 void updateMnemonicBinding(AbstractButton b) { 145 int m = b.getMnemonic(); 146 if(m != 0) { 147 InputMap map = SwingUtilities.getUIInputMap( 148 b, JComponent.WHEN_IN_FOCUSED_WINDOW); 149 150 if (map == null) { 151 map = new ComponentInputMapUIResource(b); 152 SwingUtilities.replaceUIInputMap(b, 153 JComponent.WHEN_IN_FOCUSED_WINDOW, map); 154 } 155 map.clear(); 156 map.put(KeyStroke.getKeyStroke(m, BasicLookAndFeel.getFocusAcceleratorKeyMask(), false), 157 "pressed"); 158 map.put(KeyStroke.getKeyStroke(m, BasicLookAndFeel.getFocusAcceleratorKeyMask(), true), 159 "released"); 160 map.put(KeyStroke.getKeyStroke(m, 0, true), "released"); 161 } 162 else { 163 InputMap map = SwingUtilities.getUIInputMap(b, JComponent. 164 WHEN_IN_FOCUSED_WINDOW); 165 if (map != null) { 166 map.clear(); 167 } 168 } 169 } 170 171 public void stateChanged(ChangeEvent e) { 172 AbstractButton b = (AbstractButton) e.getSource(); 173 b.repaint(); 174 } 175 176 public void focusGained(FocusEvent e) { 177 AbstractButton b = (AbstractButton) e.getSource(); 178 if (b instanceof JButton && ((JButton)b).isDefaultCapable()) { 179 JRootPane root = b.getRootPane(); 180 if (root != null) { 181 BasicButtonUI ui = (BasicButtonUI)BasicLookAndFeel.getUIOfType( 182 b.getUI(), BasicButtonUI.class); 183 if (ui != null && DefaultLookup.getBoolean(b, ui, 184 ui.getPropertyPrefix() + 185 "defaultButtonFollowsFocus", true)) { 186 root.putClientProperty("temporaryDefaultButton", b); 187 root.setDefaultButton((JButton)b); 188 root.putClientProperty("temporaryDefaultButton", null); 189 } 190 } 191 } 192 b.repaint(); 193 } 194 195 public void focusLost(FocusEvent e) { 196 AbstractButton b = (AbstractButton) e.getSource(); 197 JRootPane root = b.getRootPane(); 198 if (root != null) { 199 JButton initialDefault = (JButton)root.getClientProperty("initialDefaultButton"); 200 if (b != initialDefault) { 201 BasicButtonUI ui = (BasicButtonUI)BasicLookAndFeel.getUIOfType( 202 b.getUI(), BasicButtonUI.class); 203 if (ui != null && DefaultLookup.getBoolean(b, ui, 204 ui.getPropertyPrefix() + 205 "defaultButtonFollowsFocus", true)) { 206 root.setDefaultButton(initialDefault); 207 } 208 } 209 } 210 211 ButtonModel model = b.getModel(); 212 model.setPressed(false); 213 model.setArmed(false); 214 b.repaint(); 215 } 216 217 public void mouseMoved(MouseEvent e) { 218 } 219 220 221 public void mouseDragged(MouseEvent e) { 222 } 223 224 public void mouseClicked(MouseEvent e) { 225 } 226 227 public void mousePressed(MouseEvent e) { 228 if (SwingUtilities.isLeftMouseButton(e) ) { 229 AbstractButton b = (AbstractButton) e.getSource(); 230 231 if(b.contains(e.getX(), e.getY())) { 232 long lastTime = lastPressedTimestamp; 233 lastPressedTimestamp = e.getWhen(); 234 long timeSinceLastClick = lastPressedTimestamp - lastTime; 235 if (lastTime != -1 && 236 timeSinceLastClick > 0 && 237 timeSinceLastClick < b.getMultiClickThreshhold()) { 238 239 shouldDiscardRelease = true; 240 return; 241 } 242 243 ButtonModel model = b.getModel(); 244 if (!model.isEnabled()) { 245 // Disabled buttons ignore all input... 246 return; 247 } 248 if (!model.isArmed()) { 249 // button not armed, should be 250 model.setArmed(true); 251 } 252 model.setPressed(true); 253 if(!b.hasFocus() && b.isRequestFocusEnabled()) { 254 b.requestFocus(); 255 } 256 } 257 } 258 } 259 260 public void mouseReleased(MouseEvent e) { 261 if (SwingUtilities.isLeftMouseButton(e)) { 262 // Support for multiClickThreshhold 263 if (shouldDiscardRelease) { 264 shouldDiscardRelease = false; 265 return; 266 } 267 AbstractButton b = (AbstractButton) e.getSource(); 268 ButtonModel model = b.getModel(); 269 model.setPressed(false); 270 model.setArmed(false); 271 } 272 } 273 274 public void mouseEntered(MouseEvent e) { 275 AbstractButton b = (AbstractButton) e.getSource(); 276 ButtonModel model = b.getModel(); 277 if (b.isRolloverEnabled() && !SwingUtilities.isLeftMouseButton(e)) { 278 model.setRollover(true); 279 } 280 if (model.isPressed()) 281 model.setArmed(true); 282 } 283 284 public void mouseExited(MouseEvent e) { 285 AbstractButton b = (AbstractButton) e.getSource(); 286 ButtonModel model = b.getModel(); 287 if(b.isRolloverEnabled()) { 288 model.setRollover(false); 289 } 290 model.setArmed(false); 291 } 292 293 294 /** 295 * Actions for Buttons. Two types of action are supported: 296 * pressed: Moves the button to a pressed state 297 * released: Disarms the button. 298 */ 299 private static class Actions extends UIAction { 300 private static final String PRESS = "pressed"; 301 private static final String RELEASE = "released"; 302 303 Actions(String name) { 304 super(name); 305 } 306 307 public void actionPerformed(ActionEvent e) { 308 AbstractButton b = (AbstractButton)e.getSource(); 309 String key = getName(); 310 if (key == PRESS) { 311 ButtonModel model = b.getModel(); 312 model.setArmed(true); 313 model.setPressed(true); 314 if(!b.hasFocus()) { 315 b.requestFocus(); 316 } 317 } 318 else if (key == RELEASE) { 319 ButtonModel model = b.getModel(); 320 model.setPressed(false); 321 model.setArmed(false); 322 } 323 } 324 325 @Override 326 public boolean accept(Object sender) { 327 return !((sender instanceof AbstractButton) && 328 !((AbstractButton)sender).getModel().isEnabled()); 329 } 330 } 331 }