001    /* ListDataListener.java --
002       Copyright (C) 2002, 2005 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    package javax.swing.event;
039    
040    import java.util.EventListener;
041    
042    import javax.swing.ListModel;
043    
044    /**
045     * A <code>ListDataListener</code> can register with a {@link ListModel} and
046     * receive notification of updates to the model.
047     * 
048     * @author Andrew Selkirk
049     * @author Ronald Veldema
050     */
051    public interface ListDataListener extends EventListener 
052    {
053    
054      /**
055       * Notifies the listener that the contents of the list have changed
056       * in some way.  This method will be called if the change cannot be
057       * notified via the {@link #intervalAdded(ListDataEvent)} or the
058       * {@link #intervalRemoved(ListDataEvent)} methods.
059       * 
060       * @param event  the event.
061       */
062      void contentsChanged(ListDataEvent event);
063    
064      /**
065       * Notifies the listener that one or more items have been added to the
066       * list.  The <code>event</code> argument can supply the indices for the
067       * range of items added.
068       * 
069       * @param event  the event.
070       */
071      void intervalAdded(ListDataEvent event);
072    
073      /**
074       * Notifies the listener that one or more items have been removed from
075       * the list.  The <code>event</code> argument can supply the indices for 
076       * the range of items removed.
077       * 
078       * @param event  the event.
079       */
080      void intervalRemoved(ListDataEvent event);
081    
082    }