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1: /* BasicMenuBarUI.java -- 2: Copyright (C) 2002, 2004, 2005 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: 39: package javax.swing.plaf.basic; 40: 41: import java.awt.Dimension; 42: import java.awt.event.ContainerEvent; 43: import java.awt.event.ContainerListener; 44: import java.beans.PropertyChangeEvent; 45: import java.beans.PropertyChangeListener; 46: 47: import javax.swing.BoxLayout; 48: import javax.swing.JComponent; 49: import javax.swing.JMenuBar; 50: import javax.swing.UIDefaults; 51: import javax.swing.UIManager; 52: import javax.swing.event.ChangeEvent; 53: import javax.swing.event.ChangeListener; 54: import javax.swing.plaf.ComponentUI; 55: import javax.swing.plaf.MenuBarUI; 56: 57: /** 58: * UI Delegate for JMenuBar. 59: */ 60: public class BasicMenuBarUI extends MenuBarUI 61: { 62: protected ChangeListener changeListener; 63: 64: /*ContainerListener that listens to the ContainerEvents fired from menu bar*/ 65: protected ContainerListener containerListener; 66: 67: /*Property change listeners that listener to PropertyChangeEvent from menu bar*/ 68: protected PropertyChangeListener propertyChangeListener; 69: 70: /* menu bar for which this UI delegate is for*/ 71: protected JMenuBar menuBar; 72: 73: /** 74: * Creates a new BasicMenuBarUI object. 75: */ 76: public BasicMenuBarUI() 77: { 78: changeListener = createChangeListener(); 79: containerListener = createContainerListener(); 80: propertyChangeListener = new PropertyChangeHandler(); 81: } 82: 83: /** 84: * Creates ChangeListener 85: * 86: * @return The ChangeListener 87: */ 88: protected ChangeListener createChangeListener() 89: { 90: return new ChangeHandler(); 91: } 92: 93: /** 94: * Creates ContainerListener() to listen for ContainerEvents 95: * fired by JMenuBar. 96: * 97: * @return The ContainerListener 98: */ 99: protected ContainerListener createContainerListener() 100: { 101: return new ContainerHandler(); 102: } 103: 104: /** 105: * Factory method to create a BasicMenuBarUI for the given {@link 106: * JComponent}, which should be a {@link JMenuBar}. 107: * 108: * @param x The {@link JComponent} a UI is being created for. 109: * 110: * @return A BasicMenuBarUI for the {@link JComponent}. 111: */ 112: public static ComponentUI createUI(JComponent x) 113: { 114: return new BasicMenuBarUI(); 115: } 116: 117: /** 118: * Returns maximum size for the specified menu bar 119: * 120: * @param c component for which to get maximum size 121: * 122: * @return Maximum size for the specified menu bar 123: */ 124: public Dimension getMaximumSize(JComponent c) 125: { 126: // let layout manager calculate its size 127: return null; 128: } 129: 130: /** 131: * Returns maximum allowed size of JMenuBar. 132: * 133: * @param c menuBar for which to return maximum size 134: * 135: * @return Maximum size of the give menu bar. 136: */ 137: public Dimension getMinimumSize(JComponent c) 138: { 139: // let layout manager calculate its size 140: return null; 141: } 142: 143: /** 144: * Returns preferred size of JMenuBar. 145: * 146: * @param c menuBar for which to return preferred size 147: * 148: * @return Preferred size of the give menu bar. 149: */ 150: public Dimension getPreferredSize(JComponent c) 151: { 152: // let layout manager calculate its size 153: return null; 154: } 155: 156: /** 157: * Initializes any default properties that this UI has from the defaults for 158: * the Basic look and feel. 159: */ 160: protected void installDefaults() 161: { 162: UIDefaults defaults = UIManager.getLookAndFeelDefaults(); 163: 164: menuBar.setBackground(defaults.getColor("MenuBar.background")); 165: menuBar.setBorder(defaults.getBorder("MenuBar.border")); 166: menuBar.setFont(defaults.getFont("MenuBar.font")); 167: menuBar.setForeground(defaults.getColor("MenuBar.foreground")); 168: menuBar.setOpaque(true); 169: } 170: 171: /** 172: * This method installs the keyboard actions for the JMenuBar. 173: */ 174: protected void installKeyboardActions() 175: { 176: // FIXME: implement 177: } 178: 179: /** 180: * This method installs the listeners needed for this UI to function. 181: */ 182: protected void installListeners() 183: { 184: menuBar.addContainerListener(containerListener); 185: menuBar.addPropertyChangeListener(propertyChangeListener); 186: } 187: 188: /** 189: * Installs and initializes all fields for this UI delegate. Any properties 190: * of the UI that need to be initialized and/or set to defaults will be 191: * done now. It will also install any listeners necessary. 192: * 193: * @param c The {@link JComponent} that is having this UI installed. 194: */ 195: public void installUI(JComponent c) 196: { 197: super.installUI(c); 198: menuBar = (JMenuBar) c; 199: menuBar.setLayout(new BoxLayout(menuBar, BoxLayout.X_AXIS)); 200: installDefaults(); 201: installListeners(); 202: installKeyboardActions(); 203: } 204: 205: /** 206: * This method uninstalls the defaults and nulls any objects created during 207: * install. 208: */ 209: protected void uninstallDefaults() 210: { 211: menuBar.setBackground(null); 212: menuBar.setBorder(null); 213: menuBar.setFont(null); 214: menuBar.setForeground(null); 215: } 216: 217: /** 218: * This method reverses the work done in installKeyboardActions. 219: */ 220: protected void uninstallKeyboardActions() 221: { 222: // FIXME: implement. 223: } 224: 225: /** 226: * Unregisters all the listeners that this UI delegate was using. 227: */ 228: protected void uninstallListeners() 229: { 230: menuBar.removeContainerListener(containerListener); 231: menuBar.removePropertyChangeListener(propertyChangeListener); 232: } 233: 234: /** 235: * Performs the opposite of installUI. Any properties or resources that need 236: * to be cleaned up will be done now. It will also uninstall any listeners 237: * it has. In addition, any properties of this UI will be nulled. 238: * 239: * @param c The {@link JComponent} that is having this UI uninstalled. 240: */ 241: public void uninstallUI(JComponent c) 242: { 243: uninstallDefaults(); 244: uninstallListeners(); 245: uninstallKeyboardActions(); 246: menuBar = null; 247: } 248: 249: protected class ChangeHandler implements ChangeListener 250: { 251: public void stateChanged(ChangeEvent event) 252: { 253: } 254: } 255: 256: /** 257: * This class handles ContainerEvents fired by JMenuBar. It revalidates 258: * and repaints menu bar whenever menu is added or removed from it. 259: */ 260: protected class ContainerHandler implements ContainerListener 261: { 262: /** 263: * This method is called whenever menu is added to the menu bar 264: * 265: * @param e The ContainerEvent. 266: */ 267: public void componentAdded(ContainerEvent e) 268: { 269: menuBar.revalidate(); 270: menuBar.repaint(); 271: } 272: 273: /** 274: * This method is called whenever menu is removed from the menu bar. 275: * 276: * @param e The ContainerEvent. 277: */ 278: public void componentRemoved(ContainerEvent e) 279: { 280: menuBar.revalidate(); 281: menuBar.repaint(); 282: } 283: } 284: 285: /** 286: * This class handles PropertyChangeEvents fired from the JMenuBar 287: */ 288: protected class PropertyChangeHandler implements PropertyChangeListener 289: { 290: /** 291: * This method is called whenever one of the properties of the MenuBar 292: * changes. 293: * 294: * @param e The PropertyChangeEvent. 295: */ 296: public void propertyChange(PropertyChangeEvent e) 297: { 298: if (e.getPropertyName().equals("borderPainted")) 299: menuBar.repaint(); 300: if (e.getPropertyName().equals("margin")) 301: menuBar.repaint(); 302: } 303: } 304: }
GNU Classpath (0.17) |