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в 18:01, 31 мая 2010

2010-05-31T18:01:45Z

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== JFreeChart: Polar Chart Demo ==



<source lang="java">

/* ===========================================================
* 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.]
*
* -------------------
* PolarChartDemo.java
* -------------------
* (C) Copyright 2004, by Solution Engineering, Inc. and Contributors.
*
* Original Author: Daniel Bridenbecker, Solution Engineering, Inc.;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: PolarChartDemo.java,v 1.4 2004/04/30 11:19:22 mungady Exp $
*
* Changes
* -------
* 19-Jan-2004 : Version 1, contributed by DB with minor changes by DG (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.Dimension;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.PolarChartPanel;
import org.jfree.chart.plot.PolarPlot;
import org.jfree.chart.renderer.DefaultPolarItemRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* <code>PolarChartDemo</code> demonstrates the capabilities of the {@link PolarPlot}.
*
* @author Daniel Bridenbecker, Solution Engineering, Inc.
*/
public class PolarChartDemo extends ApplicationFrame {

/**
* Creates a new instance of the demo.
*
* @param title the frame title.
*/
public PolarChartDemo(final String title) {
super(title);
final XYDataset dataset = createDataset();
final JFreeChart chart = createChart(dataset);
final ChartPanel chartPanel = new PolarChartPanel(chart);
chartPanel.setPreferredSize(new Dimension(500, 270));
chartPanel.setEnforceFileExtensions(false);
setContentPane(chartPanel);
}

/**
* Creates a sample dataset.
*
* @return A sample dataset.
*/
private XYDataset createDataset() {
final XYSeriesCollection data = new XYSeriesCollection();
final XYSeries series1 = createRandomData("Series 1", 75.0, 10.0);
final XYSeries series2 = createRandomData("Series 2", 50.0, 5.0);
final XYSeries series3 = createRandomData("Series 3", 25.0, 1.0);
data.addSeries(series1);
data.addSeries(series2);
data.addSeries(series3);
return data;
}

/**
* Creates a sample chart.
*
* @param dataset the dataset.
*
* @return A sample chart.
*/
private JFreeChart createChart(final XYDataset dataset) {
final JFreeChart chart = ChartFactory.createPolarChart(
"Polar Chart Demo", dataset, true, true, false
);
final PolarPlot plot = (PolarPlot) chart.getPlot();
final DefaultPolarItemRenderer renderer = (DefaultPolarItemRenderer) plot.getRenderer();
renderer.setSeriesFilled(2, true);
return chart;
}

/**
* Creates a series containing random data.
*
* @param name the series name.
* @param baseRadius the base radius.
* @param thetaInc the angle increment.
*
* @return The series.
*/
private static XYSeries createRandomData(final String name,
final double baseRadius,
final double thetaInc) {
final XYSeries series = new XYSeries(name);
for (double theta = 0.0; theta < 360.0; theta += thetaInc) {
final double radius = baseRadius * (1.0 + Math.random());
series.add(theta, radius);
}
return series;
}

/**
* Main program that creates a thermometer and places it into
* a JFrame.
*
* @param argv Command line arguements - none used.
*/
public static void main(final String[] argv) {

final PolarChartDemo demo = new PolarChartDemo("Polar Chart Demo");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);

}

}

</source>

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в 18:01, 31 мая 2010