| /* AbstractSpinnerModel.java -- |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.swing; |
| |
| import java.util.EventListener; |
| |
| import javax.swing.event.ChangeEvent; |
| import javax.swing.event.ChangeListener; |
| import javax.swing.event.EventListenerList; |
| |
| /** |
| * Provides standard implementations for some of the methods in |
| * {@link SpinnerModel}. |
| * |
| * @author Ka-Hing Cheung |
| */ |
| public abstract class AbstractSpinnerModel implements SpinnerModel |
| { |
| private ChangeEvent changeEvent = new ChangeEvent(this); |
| |
| protected EventListenerList listenerList = new EventListenerList(); |
| |
| /** |
| * Creates an <code>AbstractSpinnerModel</code>. |
| */ |
| public AbstractSpinnerModel() |
| { |
| // Nothing to do here. |
| } |
| |
| /** |
| * Adds a <code>ChangeListener</code>. |
| * |
| * @param listener the listener to add |
| */ |
| public void addChangeListener(ChangeListener listener) |
| { |
| listenerList.add(ChangeListener.class, listener); |
| } |
| |
| /** |
| * Gets all the listeners that are of a particular type. |
| * |
| * @param c the type of listener |
| * @return the listeners that are of the specific type |
| */ |
| public EventListener[] getListeners(Class c) |
| { |
| return listenerList.getListeners(c); |
| } |
| |
| /** |
| * Gets all the <code>ChangeListener</code>s. |
| * |
| * @return all the <code>ChangeListener</code>s |
| */ |
| public ChangeListener[] getChangeListeners() |
| { |
| return (ChangeListener[]) listenerList.getListeners(ChangeListener.class); |
| } |
| |
| /** |
| * Remove a particular listener. |
| * |
| * @param listener the listener to remove |
| */ |
| public void removeChangeListener(ChangeListener listener) |
| { |
| listenerList.remove(ChangeListener.class, listener); |
| } |
| |
| /** |
| * Fires a <code>ChangeEvent</code> to all the <code>ChangeListener</code>s |
| * added to this model |
| */ |
| protected void fireStateChanged() |
| { |
| ChangeListener[] listeners = getChangeListeners(); |
| |
| for (int i = 0; i < listeners.length; ++i) |
| listeners[i].stateChanged(changeEvent); |
| } |
| } |