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Creates an HTML image map for a multiple pie chart
/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------------
* ImageMapDemo6.java
* ------------------
* (C) Copyright 2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: ImageMapDemo6.java,v 1.2 2004/04/26 19:11:55 taqua Exp $
*
* Changes
* -------
* 31-Mar-2004 : Version 1 (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Font;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.labels.StandardPieItemLabelGenerator;
import org.jfree.chart.plot.MultiplePiePlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.util.TableOrder;
/**
* Creates an HTML image map for a multiple pie chart.
*/
public class ImageMapDemo6 {
/**
* Default constructor.
*/
public ImageMapDemo6() {
super();
}
/**
* Saves the chart image and HTML.
*/
public void saveImageAndHTML() {
final CategoryDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
// ****************************************************************************
// * JFREECHART DEVELOPER GUIDE *
// * The JFreeChart Developer Guide, written by David Gilbert, is available *
// * to purchase from Object Refinery Limited: *
// * *
// * http://www.object-refinery.com/jfreechart/guide.html *
// * *
// * Sales are used to provide funding for the JFreeChart project - please *
// * support us so that we can continue developing free software. *
// ****************************************************************************
// save it to an image
try {
final ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
final File file1 = new File("multipiechart100.png");
ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);
// write an HTML page incorporating the image with an image map
final File file2 = new File("multipiechart100.html");
final OutputStream out = new BufferedOutputStream(new FileOutputStream(file2));
final PrintWriter writer = new PrintWriter(out);
writer.println("<HTML>");
writer.println("<HEAD><TITLE>JFreeChart Image Map Demo</TITLE></HEAD>");
writer.println("<BODY>");
// ChartUtilities.writeImageMap(writer, "chart", info);
writer.println("<IMG SRC="multipiechart100.png" "
+ "WIDTH="600" HEIGHT="400" BORDER="0" USEMAP="#chart">");
writer.println("</BODY>");
writer.println("</HTML>");
writer.close();
}
catch (IOException e) {
System.out.println(e.toString());
}
}
/**
* Creates a sample dataset.
*
* @return A sample dataset.
*/
private CategoryDataset createDataset() {
final double[][] data = new double[][] {
{3.0, 4.0, 3.0, 5.0},
{5.0, 7.0, 6.0, 8.0},
{5.0, 7.0, 3.0, 8.0},
{1.0, 2.0, 3.0, 4.0},
{2.0, 3.0, 2.0, 3.0}
};
final CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
"Region ",
"Sales/Q",
data
);
return dataset;
}
/**
* Creates a sample chart with the given dataset.
*
* @param dataset the dataset.
*
* @return A sample chart.
*/
private JFreeChart createChart(final CategoryDataset dataset) {
final JFreeChart chart = ChartFactory.createMultiplePieChart(
"Multiple Pie Chart", // chart title
dataset, // dataset
TableOrder.BY_ROW,
true, // include legend
true,
true
);
final MultiplePiePlot plot = (MultiplePiePlot) chart.getPlot();
final JFreeChart subchart = plot.getPieChart();
final PiePlot p = (PiePlot) subchart.getPlot();
p.setLabelGenerator(new StandardPieItemLabelGenerator("{0}"));
p.setLabelFont(new Font("SansSerif", Font.PLAIN, 8));
p.setInteriorGap(0.30);
return chart;
}
/**
* Starting point for the demo.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final ImageMapDemo6 demo = new ImageMapDemo6();
demo.saveImageAndHTML();
}
}
