A demo showing how to create an HTML image map for a 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.]
*
* ------------------
* ImageMapDemo2.java
* ------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): Richard Atkinson (richard_c_atkinson@ntlworld.com);
*
* $Id: ImageMapDemo2.java,v 1.15 2004/04/26 19:11:55 taqua Exp $
*
* Changes
* -------
* 26-Jun-2002 : Version 1 (DG);
* 05-Aug-2002 : Modified to demonstrate hrefs and alt tags in image map (RA);
* 10-Oct-2002 : Fixed errors reported by Checkstyle (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Insets;
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.PiePlot;
import org.jfree.chart.urls.StandardPieURLGenerator;
import org.jfree.data.general.DefaultPieDataset;
/**
* A demo showing how to create an HTML image map for a pie chart.
*
*/
public class ImageMapDemo2 {
/**
* Default constructor.
*/
public ImageMapDemo2() {
super();
}
/**
* The starting point for the demo.
*
* @param args ignored.
*/
public static void main(final String[] args) {
// create a chart
final DefaultPieDataset data = new DefaultPieDataset();
data.setValue("One", new Double(43.2));
data.setValue("Two", new Double(10.0));
data.setValue("Three", new Double(27.5));
data.setValue("Four", new Double(17.5));
data.setValue("Five", new Double(11.0));
data.setValue("Six", new Double(19.4));
JFreeChart chart = null;
final boolean drilldown = true;
// create the chart...
if (drilldown) {
final PiePlot plot = new PiePlot(data);
// plot.setInsets(new Insets(0, 5, 5, 5));
plot.setToolTipGenerator(new StandardPieItemLabelGenerator());
plot.setURLGenerator(new StandardPieURLGenerator("pie_chart_detail.jsp"));
chart = new JFreeChart("Pie Chart Demo 1", JFreeChart.DEFAULT_TITLE_FONT, plot, true);
}
else {
chart = ChartFactory.createPieChart(
"Pie Chart Demo 1", // chart title
data, // data
true, // include legend
true,
false
);
}
chart.setBackgroundPaint(java.awt.Color.white);
// ****************************************************************************
// * 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("piechart100.png");
ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);
// write an HTML page incorporating the image with an image map
final File file2 = new File("piechart100.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 2</TITLE></HEAD>");
writer.println("<BODY>");
// ChartUtilities.writeImageMap(writer, "chart", info);
writer.println("<IMG SRC=\"piechart100.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());
}
}
}
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