JFreeChart: XML Pie Chart Demo
/* ===========================================================
* 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.]
*
* --------------------
* XMLPieChartDemo.java
* --------------------
* (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* $Id: XMLPieChartDemo.java,v 1.14 2004/04/26 19:12:04 taqua Exp $
*
* Changes
* -------
* 20-Nov-2002 : Version 1 (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Color;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.text.NumberFormat;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieItemLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.PieDataset;
import org.jfree.data.xml.DatasetReader;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A simple demonstration application showing how to create a pie chart from data in an
* XML file.
*
*/
public class XMLPieChartDemo extends ApplicationFrame {
/**
* Default constructor.
*
* @param title the frame title.
*/
public XMLPieChartDemo(final String title) {
super(title);
// create a dataset...
PieDataset dataset = null;
final URL url = getClass().getResource("/org/jfree/chart/demo/piedata.xml");
try {
final InputStream in = url.openStream();
dataset = DatasetReader.readPieDatasetFromXML(in);
}
catch (IOException ioe) {
System.out.println(ioe.getMessage());
}
// create the chart...
final JFreeChart chart = ChartFactory.createPieChart(
"Pie Chart Demo 1", // chart title
dataset, // data
true, // include legend
true,
false
);
// set the background color for the chart...
chart.setBackgroundPaint(Color.yellow);
final PiePlot plot = (PiePlot) chart.getPlot();
plot.setLabelGenerator(new StandardPieItemLabelGenerator(
"{0} = {2}", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance()
));
plot.setNoDataMessage("No data available");
// add the chart to a panel...
final ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
// ****************************************************************************
// * 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. *
// ****************************************************************************
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(final String[] args) {
final XMLPieChartDemo demo = new XMLPieChartDemo("XML Pie Chart Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
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