001 /* ======================================================
002 * Orson : a free chart beans library based on JFreeChart
003 * ======================================================
004 *
005 * (C) Copyright 2007, by Object Refinery Limited.
006 *
007 * Project Info: not-yet-released
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
029 package org.jfree.beans;
030
031 import java.awt.Color;
032 import java.beans.PropertyChangeEvent;
033
034 import org.jfree.chart.ChartFactory;
035 import org.jfree.chart.JFreeChart;
036 import org.jfree.chart.plot.PlotOrientation;
037 import org.jfree.chart.plot.XYPlot;
038 import org.jfree.data.xy.XYDataset;
039 import org.jfree.data.xy.XYSeries;
040 import org.jfree.data.xy.XYSeriesCollection;
041 import org.jfree.ui.RectangleInsets;
042
043 /**
044 * A JavaBean that displays an area chart.
045 */
046 public class JAreaChart extends NumericalXYChart {
047
048 /**
049 * Creates a new pie chart bean.
050 */
051 public JAreaChart() {
052 super();
053 }
054
055 /**
056 * Creates a default chart.
057 *
058 * @return The default chart.
059 */
060 protected JFreeChart createDefaultChart() {
061 XYSeriesCollection dataset = new XYSeriesCollection();
062 XYSeries s1 = new XYSeries("Series 1");
063 s1.add(1.0, 5.0);
064 s1.add(2.0, 7.0);
065 s1.add(3.0, 3.0);
066 s1.add(4.0, 6.0);
067 dataset.addSeries(s1);
068 JFreeChart chart = ChartFactory.createXYAreaChart("JAreaChart - Title",
069 "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false);
070 XYPlot plot = (XYPlot) chart.getPlot();
071 plot.setBackgroundPaint(Color.lightGray);
072 plot.setDomainGridlinePaint(Color.white);
073 plot.setRangeGridlinePaint(Color.white);
074 plot.setAxisOffset(new RectangleInsets(4, 4, 4, 4));
075
076 return chart;
077 }
078
079 /**
080 * Returns the dataset used by the chart.
081 *
082 * @return The dataset (possibly <code>null</code>).
083 *
084 * @see #setDataset(XYDataset)
085 */
086 public XYDataset getDataset() {
087 XYDataset result = null;
088 XYPlot plot = (XYPlot) this.chart.getPlot();
089 if (plot != null) {
090 result = plot.getDataset();
091 }
092 return result;
093 }
094
095 /**
096 * Sets the dataset used by the chart and sends a
097 * {@link PropertyChangeEvent} for the <code>dataset</code> property to all
098 * registered listeners.
099 *
100 * @param dataset the dataset (<code>null</code> permitted).
101 *
102 * @see #getDataset()
103 */
104 public void setDataset(XYDataset dataset) {
105 XYPlot plot = (XYPlot) this.chart.getPlot();
106 if (plot != null) {
107 XYDataset old = plot.getDataset();
108 plot.setDataset(dataset);
109 firePropertyChange("dataset", old, dataset);
110 }
111 }
112
113 }