001/* ===========================================================
002 * Orson Charts : a 3D chart library for the Java(tm) platform
003 * ===========================================================
004 * 
005 * (C)opyright 2013-2022, by David Gilbert.  All rights reserved.
006 * 
007 * https://github.com/jfree/orson-charts
008 * 
009 * This program is free software: you can redistribute it and/or modify
010 * it under the terms of the GNU General Public License as published by
011 * the Free Software Foundation, either version 3 of the License, or
012 * (at your option) any later version.
013 *
014 * This program is distributed in the hope that it will be useful,
015 * but WITHOUT ANY WARRANTY; without even the implied warranty of
016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
017 * GNU General Public License for more details.
018 *
019 * You should have received a copy of the GNU General Public License
020 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
021 * 
022 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
023 * Other names may be trademarks of their respective owners.]
024 * 
025 * If you do not wish to be bound by the terms of the GPL, an alternative
026 * commercial license can be purchased.  For details, please see visit the
027 * Orson Charts home page:
028 * 
029 * http://www.object-refinery.com/orsoncharts/index.html
030 * 
031 */
032
033package org.jfree.chart3d;
034
035import java.util.EventObject;
036
037import org.jfree.chart3d.internal.Args;
038
039/**
040 * An event indicating some change in the attributes of a chart.  Typically 
041 * this indicates that the chart needs to be redrawn.  Any object that 
042 * implements the {@link Chart3DChangeListener} interface can register
043 * with a chart to receive change event notification.
044 * <br><br>
045 * NOTE: This class is serializable, but the serialization format is subject 
046 * to change in future releases and should not be relied upon for persisting 
047 * instances of this class.
048 */
049@SuppressWarnings("serial")
050public class Chart3DChangeEvent extends EventObject {
051
052    /** The chart that is the source of the event. */
053    private Chart3D chart;
054  
055    /**
056     * Creates a new event.
057     * 
058     * @param chart  the chart that is the source of the event ({@code null} 
059     *     not permitted). 
060     */
061    public Chart3DChangeEvent(Chart3D chart) {
062        this(chart, chart);
063    }
064    
065    /**
066     * Creates a new event.
067     * 
068     * @param source  the source.
069     * @param chart  the chart that is the source of the event ({@code null} 
070     *     not permitted).
071     */
072    public Chart3DChangeEvent(Object source, Chart3D chart) {
073        super(source);
074        Args.nullNotPermitted(chart, "chart");
075        this.chart = chart;
076    }
077  
078    /**
079     * Returns the chart that this event is associated with.
080     * 
081     * @return The chart (never {@code null}). 
082     */
083    public Chart3D getChart() {
084        return this.chart;
085    }
086}