001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ------------------------
028 * ChartChangeListener.java
029 * ------------------------
030 * (C) Copyright 2000-2008, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): -;
034 *
035 * Changes (from 24-Aug-2001)
036 * --------------------------
037 * 24-Aug-2001 : Added standard source header. Fixed DOS encoding problem (DG);
038 * 07-Nov-2001 : Updated header (DG);
039 * 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
040 * 14-Oct-2002 : Now extends java.util.EventListener (DG);
041 *
042 */
043
044 package org.jfree.chart.event;
045
046 import java.util.EventListener;
047
048 /**
049 * The interface that must be supported by classes that wish to receive
050 * notification of chart events.
051 * <P>
052 * The {@link org.jfree.chart.ChartPanel} class registers itself with the
053 * chart it displays, and whenever the chart changes, the panel redraws itself.
054 *
055 */
056 public interface ChartChangeListener extends EventListener {
057
058 /**
059 * Receives notification of a chart change event.
060 *
061 * @param event the event.
062 */
063 public void chartChanged(ChartChangeEvent event);
064
065 }