/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation; either version 2.1 of the License, or 
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public 
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ------------------------
 * ChartChangeListener.java
 * ------------------------
 * (C) Copyright 2000-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ChartChangeListener.java,v 1.2.2.1 2005/10/25 20:42:25 mungady Exp $
 *
 * Changes (from 24-Aug-2001)
 * --------------------------
 * 24-Aug-2001 : Added standard source header. Fixed DOS encoding problem (DG);
 * 07-Nov-2001 : Updated header (DG);
 * 09-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 14-Oct-2002 : Now extends java.util.EventListener (DG);
 *
 */

package org.jfree.chart.event;

import java.util.EventListener;

/**
 * The interface that must be supported by classes that wish to receive 
 * notification of chart events.
 * <P>
 * The {@link org.jfree.chart.ChartPanel} class registers itself with the 
 * chart it displays, and whenever the chart changes, the panel redraws itself.
 *
 */
public interface ChartChangeListener extends EventListener {

    /**
     * Receives notification of a chart change event.
     *
     * @param event  the event.
     */
    public void chartChanged(ChartChangeEvent event);

}
