GNU Classpath (0.18) | ||
Frames | No Frames |
1: /* AbstractSpinnerModel.java -- 2: Copyright (C) 2004 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; 40: 41: import java.util.EventListener; 42: 43: import javax.swing.event.ChangeEvent; 44: import javax.swing.event.ChangeListener; 45: import javax.swing.event.EventListenerList; 46: 47: /** 48: * Provides standard implementations for some of the methods in 49: * {@link SpinnerModel}. 50: * 51: * @author Ka-Hing Cheung 52: */ 53: public abstract class AbstractSpinnerModel implements SpinnerModel 54: { 55: private ChangeEvent changeEvent = new ChangeEvent(this); 56: 57: protected EventListenerList listenerList = new EventListenerList(); 58: 59: /** 60: * Creates an <code>AbstractSpinnerModel</code>. 61: */ 62: public AbstractSpinnerModel() 63: { 64: } 65: 66: /** 67: * Adds a <code>ChangeListener</code>. 68: * 69: * @param listener the listener to add 70: */ 71: public void addChangeListener(ChangeListener listener) 72: { 73: listenerList.add(ChangeListener.class, listener); 74: } 75: 76: /** 77: * Gets all the listeners that are of a particular type. 78: * 79: * @param c the type of listener 80: * @return the listeners that are of the specific type 81: */ 82: public EventListener[] getListeners(Class c) 83: { 84: return listenerList.getListeners(c); 85: } 86: 87: /** 88: * Gets all the <code>ChangeListener</code>s. 89: * 90: * @return all the <code>ChangeListener</code>s 91: */ 92: public ChangeListener[] getChangeListeners() 93: { 94: return (ChangeListener[]) listenerList.getListeners(ChangeListener.class); 95: } 96: 97: /** 98: * Remove a particular listener. 99: * 100: * @param listener the listener to remove 101: */ 102: public void removeChangeListener(ChangeListener listener) 103: { 104: listenerList.remove(ChangeListener.class, listener); 105: } 106: 107: /** 108: * Fires a <code>ChangeEvent</code> to all the <code>ChangeListener</code>s 109: * added to this model 110: */ 111: protected void fireStateChanged() 112: { 113: ChangeListener[] listeners = getChangeListeners(); 114: 115: for(int i = 0; i < listeners.length; ++i) 116: listeners[i].stateChanged(changeEvent); 117: } 118: }
GNU Classpath (0.18) |