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1: /* JButton.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: package javax.swing; 39: 40: import javax.accessibility.Accessible; 41: import javax.accessibility.AccessibleContext; 42: import javax.accessibility.AccessibleRole; 43: import javax.swing.plaf.ButtonUI; 44: 45: 46: /** 47: * A general purpose push button. <code>JButton</code>s can display a label, 48: * an {@link Icon} or both. 49: * 50: * @author Ronald Veldema (rveldema@cs.vu.nl) 51: */ 52: public class JButton extends AbstractButton 53: implements Accessible 54: { 55: 56: /** 57: * Accessibility support for JButtons. 58: */ 59: protected class AccessibleJButton 60: extends AbstractButton.AccessibleAbstractButton 61: { 62: /** 63: * Returns the accessible role that this component represents. 64: * This is {@link AccessibleRole#PUSH_BUTTON} for <code>JButton</code>s. 65: * 66: * @return the accessible role that this component represents 67: */ 68: public AccessibleRole getAccessibleRole() 69: { 70: return AccessibleRole.PUSH_BUTTON; 71: } 72: } 73: 74: private static final long serialVersionUID = -1907255238954382202L; 75: boolean def; 76: boolean is_def; 77: 78: public JButton() 79: { 80: this(null, null); 81: } 82: 83: public JButton(Action a) 84: { 85: this(); 86: setAction(a); 87: } 88: 89: public JButton(Icon icon) 90: { 91: this(null, icon); 92: } 93: 94: public JButton(String text) 95: { 96: this(text, null); 97: } 98: 99: public JButton(String text, Icon icon) 100: { 101: super(); 102: init(text, icon); 103: setModel(new DefaultButtonModel()); 104: } 105: 106: public Object[] getSelectedObjects() 107: { 108: return null; 109: } 110: 111: protected void configurePropertiesFromAction(Action a) 112: { 113: // Factory method which sets the AbstractButton's properties according to 114: // values from the Action instance. 115: super.configurePropertiesFromAction(a); 116: } 117: 118: public AccessibleContext getAccessibleContext() 119: { 120: if (accessibleContext == null) 121: accessibleContext = new AccessibleJButton(); 122: return accessibleContext; 123: } 124: 125: public String getUIClassID() 126: { 127: // Returns a string that specifies the name of the L&F class that renders 128: // this component. 129: return "ButtonUI"; 130: } 131: 132: public boolean isDefaultButton() 133: { 134: // Returns whether or not this button is the default button on the 135: // RootPane. 136: return is_def; 137: } 138: 139: public boolean isDefaultCapable() 140: { 141: // Returns whether or not this button is capable of being the default 142: // button on the RootPane. 143: return def; 144: } 145: 146: protected String paramString() 147: { 148: String superParam = super.paramString(); 149: 150: // 41 is the maximum number of chars which may be needed. 151: StringBuffer sb = new StringBuffer(41); 152: sb.append(",defaultButton=").append(is_def); 153: sb.append(",defaultCapable=").append(def); 154: 155: return superParam + sb.toString(); 156: } 157: 158: /** 159: * Overrides JComponent.removeNotify to check if this button is currently 160: * set as the default button on the RootPane, and if so, sets the RootPane's 161: * default button to null to ensure the RootPane doesn't hold onto an invalid 162: * button reference. 163: */ 164: public void removeNotify() 165: { 166: JRootPane root = SwingUtilities.getRootPane(this); 167: if (root != null && root.getDefaultButton() == this) 168: root.setDefaultButton(null); 169: super.removeNotify(); 170: } 171: 172: public void setDefaultCapable(boolean defaultCapable) 173: { 174: def = defaultCapable; 175: } 176: 177: public void updateUI() 178: { 179: setUI((ButtonUI) UIManager.getUI(this)); 180: } 181: }
GNU Classpath (0.20) |