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1: /* SwingButtonPeer.java -- A Swing based peer for AWT buttons 2: Copyright (C) 2006, 2007 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: package gnu.java.awt.peer.swing; 39: 40: import java.awt.Button; 41: import java.awt.Container; 42: import java.awt.Graphics; 43: import java.awt.Image; 44: import java.awt.Point; 45: import java.awt.event.ActionEvent; 46: import java.awt.event.ActionListener; 47: import java.awt.event.FocusEvent; 48: import java.awt.event.KeyEvent; 49: import java.awt.event.MouseEvent; 50: import java.awt.peer.ButtonPeer; 51: 52: import javax.swing.JButton; 53: import javax.swing.JComponent; 54: 55: /** 56: * A Swing based peer for the AWT button. 57: * 58: * @author Roman Kennke (kennke@aicas.com) 59: */ 60: public class SwingButtonPeer 61: extends SwingComponentPeer 62: implements ButtonPeer 63: { 64: 65: /** 66: * A specialized Swing button to be used as AWT button. 67: * 68: * @author Roman Kennke (kennke@aicas.com) 69: */ 70: class SwingButton 71: extends JButton 72: implements SwingComponent 73: { 74: Button button; 75: 76: SwingButton(Button button) 77: { 78: this.button = button; 79: } 80: 81: /** 82: * Overridden so that this method returns the correct value even without a 83: * peer. 84: * 85: * @return the screen location of the button 86: */ 87: public Point getLocationOnScreen() 88: { 89: return SwingButtonPeer.this.getLocationOnScreen(); 90: } 91: 92: /** 93: * Overridden so that the isShowing method returns the correct value for the 94: * swing button, even if it has no peer on its own. 95: * 96: * @return <code>true</code> if the button is currently showing, 97: * <code>false</code> otherwise 98: */ 99: public boolean isShowing() 100: { 101: boolean retVal = false; 102: if (button != null) 103: retVal = button.isShowing(); 104: return retVal; 105: } 106: 107: /** 108: * Overridden, so that the Swing button can create an Image without its 109: * own peer. 110: * 111: * @param w the width of the image 112: * @param h the height of the image 113: * 114: * @return an image 115: */ 116: public Image createImage(int w, int h) 117: { 118: return SwingButtonPeer.this.createImage(w, h); 119: } 120: 121: /** 122: * Overridden, so that the Swing button can create a Graphics without its 123: * own peer. 124: * 125: * @return a graphics instance for the button 126: */ 127: public Graphics getGraphics() 128: { 129: return SwingButtonPeer.this.getGraphics(); 130: } 131: 132: /** 133: * Returns this button. 134: * 135: * @return this button 136: */ 137: public JComponent getJComponent() 138: { 139: return this; 140: } 141: 142: /** 143: * Handles mouse events by forwarding it to 144: * <code>processMouseEvent()</code> after having retargetted it to this 145: * button. 146: * 147: * @param ev the mouse event 148: */ 149: public void handleMouseEvent(MouseEvent ev) 150: { 151: ev.setSource(this); 152: processMouseEvent(ev); 153: } 154: 155: /** 156: * Handles mouse motion events by forwarding it to 157: * <code>processMouseMotionEvent()</code> after having retargetted it to 158: * this button. 159: * 160: * @param ev the mouse motion event 161: */ 162: public void handleMouseMotionEvent(MouseEvent ev) 163: { 164: ev.setSource(this); 165: processMouseMotionEvent(ev); 166: } 167: 168: /** 169: * Handles key events by forwarding it to 170: * <code>processKeyEvent()</code> after having retargetted it to this 171: * button. 172: * 173: * @param ev the mouse event 174: */ 175: public void handleKeyEvent(KeyEvent ev) 176: { 177: ev.setSource(this); 178: processKeyEvent(ev); 179: } 180: 181: public Container getParent() 182: { 183: Container par = null; 184: if (button != null) 185: par = button.getParent(); 186: return par; 187: } 188: 189: /** 190: * Handles focus events by forwarding it to 191: * <code>processFocusEvent()</code>. 192: * 193: * @param ev the Focus event 194: */ 195: public void handleFocusEvent(FocusEvent ev) 196: { 197: processFocusEvent(ev); 198: } 199: 200: public void requestFocus() { 201: SwingButtonPeer.this.requestFocus(awtComponent, false, true, 0); 202: } 203: 204: public boolean requestFocus(boolean temporary) { 205: return SwingButtonPeer.this.requestFocus(awtComponent, temporary, 206: true, 0); 207: } 208: } 209: 210: /** 211: * Listens for ActionEvents on the Swing button and triggers corresponding 212: * ActionEvents on the AWT button. 213: * 214: * @author Roman Kennke (kennke@aicas.com) 215: */ 216: class SwingButtonListener implements ActionListener 217: { 218: 219: /** 220: * Receives notification when an action was performend on the button. 221: * 222: * @param event the action event 223: */ 224: public void actionPerformed(ActionEvent event) 225: { 226: Button b = (Button) SwingButtonPeer.this.awtComponent; 227: ActionListener[] l = b.getActionListeners(); 228: if (l.length == 0) 229: return; 230: ActionEvent ev = new ActionEvent(b, ActionEvent.ACTION_PERFORMED, 231: b.getActionCommand()); 232: for (int i = 0; i < l.length; ++i) 233: l[i].actionPerformed(ev); 234: } 235: 236: } 237: 238: /** 239: * Constructs a new SwingButtonPeer. 240: * 241: * @param theButton the AWT button for this peer 242: */ 243: public SwingButtonPeer(Button theButton) 244: { 245: SwingButton button = new SwingButton(theButton); 246: button.setText(theButton.getLabel()); 247: button.addActionListener(new SwingButtonListener()); 248: init(theButton, button); 249: } 250: 251: /** 252: * Sets the label of the button. This call is forwarded to the setText method 253: * of the managed Swing button. 254: * 255: * @param label the label to set 256: */ 257: public void setLabel(String label) 258: { 259: ((SwingButton) swingComponent).setText(label); 260: } 261: }