| /* AbstractListModel.java -- |
| Copyright (C) 2002, 2004, 2006, 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.io.Serializable; |
| import java.util.EventListener; |
| |
| import javax.swing.event.EventListenerList; |
| import javax.swing.event.ListDataEvent; |
| import javax.swing.event.ListDataListener; |
| |
| /** |
| * Provides standard implementations of some methods in {@link ListModel}. |
| * |
| * @author Ronald Veldema |
| * @author Andrew Selkirk |
| */ |
| public abstract class AbstractListModel implements ListModel, Serializable |
| { |
| private static final long serialVersionUID = -3285184064379168730L; |
| |
| /** List of ListDataListeners called for each change to the list. */ |
| protected EventListenerList listenerList; |
| |
| /** |
| * Creates a new model instance - initialises the event listener list. |
| */ |
| public AbstractListModel() |
| { |
| listenerList = new EventListenerList(); |
| } |
| |
| /** |
| * Add a listener object to this model. The listener will be called |
| * any time the set of elements in the model is changed. |
| * |
| * @param listener The listener to add |
| */ |
| public void addListDataListener(ListDataListener listener) |
| { |
| listenerList.add(ListDataListener.class, listener); |
| } |
| |
| /** |
| * Add a listener object to this model. The listener will no longer be |
| * called when the set of elements in the model is changed. |
| * |
| * @param listener The listener to remove |
| */ |
| public void removeListDataListener(ListDataListener listener) |
| { |
| listenerList.remove(ListDataListener.class, listener); |
| } |
| |
| /** |
| * Call {@link ListDataListener#contentsChanged} on each element of the |
| * {@link #listenerList} which is a {@link ListDataListener}. The event |
| * fired has type {@link ListDataEvent#CONTENTS_CHANGED} and represents a |
| * change to the data elements in the range [startIndex, endIndex] |
| * inclusive. |
| * |
| * @param source The source of the change, typically <code>this</code> |
| * @param startIndex The index of the first element which changed |
| * @param endIndex The index of the last element which changed |
| */ |
| protected void fireContentsChanged(Object source, int startIndex, |
| int endIndex) |
| { |
| ListDataEvent event = new ListDataEvent(source, ListDataEvent.CONTENTS_CHANGED, |
| startIndex, endIndex); |
| ListDataListener[] listeners = getListDataListeners(); |
| |
| for (int index = 0; index < listeners.length; index++) |
| listeners[index].contentsChanged(event); |
| } |
| |
| /** |
| * Call {@link ListDataListener#intervalAdded} on each element of the |
| * {@link #listenerList} which is a {@link ListDataListener}. The event |
| * fired has type {@link ListDataEvent#INTERVAL_ADDED} and represents an |
| * addition of the data elements in the range [startIndex, endIndex] |
| * inclusive. |
| * |
| * @param source The source of the change, typically <code>this</code> |
| * @param startIndex The index of the first new element |
| * @param endIndex The index of the last new element |
| */ |
| protected void fireIntervalAdded(Object source, int startIndex, int endIndex) |
| { |
| ListDataEvent event = |
| new ListDataEvent(source, ListDataEvent.INTERVAL_ADDED, |
| startIndex, endIndex); |
| ListDataListener[] listeners = getListDataListeners(); |
| |
| for (int index = 0; index < listeners.length; index++) |
| listeners[index].intervalAdded(event); |
| } |
| |
| /** |
| * Call {@link ListDataListener#intervalRemoved} on each element of the |
| * {@link #listenerList} which is a {@link ListDataListener}. The event |
| * fired has type {@link ListDataEvent#INTERVAL_REMOVED} and represents a |
| * removal of the data elements in the range [startIndex, endIndex] |
| * inclusive. |
| * |
| * @param source The source of the change, typically <code>this</code> |
| * @param startIndex The index of the first element removed |
| * @param endIndex The index of the last element removed |
| */ |
| protected void fireIntervalRemoved(Object source, int startIndex, |
| int endIndex) |
| { |
| ListDataEvent event = |
| new ListDataEvent(source, ListDataEvent.INTERVAL_REMOVED, |
| startIndex, endIndex); |
| ListDataListener[] listeners = getListDataListeners(); |
| |
| for (int index = 0; index < listeners.length; index++) |
| listeners[index].intervalRemoved(event); |
| } |
| |
| /** |
| * Return the subset of {@link EventListener} objects found in this |
| * object's {@link #listenerList} which are elements of the specified |
| * type. |
| * |
| * @param listenerType The type of listeners to select |
| * |
| * @return The set of listeners of the specified type |
| */ |
| public EventListener[] getListeners(Class listenerType) |
| { |
| return listenerList.getListeners(listenerType); |
| } |
| |
| /** |
| * A synonym for <code>getListeners(ListDataListener.class)</code>. |
| * |
| * @return The set of ListDataListeners found in the {@link #listenerList} |
| */ |
| public ListDataListener[] getListDataListeners() |
| { |
| return (ListDataListener[]) getListeners(ListDataListener.class); |
| } |
| } |