?? piechart3ddemo3.java
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/* --------------------
* PieChart3DDemo3.java
* --------------------
* (C) Copyright 2004, by Object Refinery Limited.
*
*/
package demo;
import java.text.AttributedString;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.PieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot3D;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.Rotation;
/**
* A pie chart with a custom label generator.
*/
public class PieChart3DDemo3 extends ApplicationFrame {
/**
* Creates a new demo.
*
* @param title the frame title.
*/
public PieChart3DDemo3(String title) {
super(title);
PieDataset dataset = createDataset();
JFreeChart chart = createChart(dataset);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
}
/**
* Creates a sample dataset for the demo.
*
* @return A sample dataset.
*/
private static PieDataset createDataset() {
DefaultPieDataset result = new DefaultPieDataset();
result.setValue("Java", new Double(43.2));
result.setValue("Visual Basic", new Double(10.0));
result.setValue("C/C++", new Double(17.5));
result.setValue("PHP", new Double(32.5));
result.setValue("Perl", new Double(1.0));
return result;
}
/**
* Creates a sample chart.
*
* @param dataset the dataset.
*
* @return A chart.
*/
private static JFreeChart createChart(PieDataset dataset) {
JFreeChart chart = ChartFactory.createPieChart3D(
"Pie Chart 3D Demo 3", // chart title
dataset, // data
true, // include legend
true,
false
);
PiePlot3D plot = (PiePlot3D) chart.getPlot();
plot.setStartAngle(290);
plot.setDirection(Rotation.CLOCKWISE);
plot.setForegroundAlpha(0.5f);
plot.setNoDataMessage("No data to display");
plot.setLabelGenerator(new CustomLabelGenerator());
return chart;
}
/**
* Creates a panel for the demo (used by SuperDemo.java).
*
* @return A panel.
*/
public static JPanel createDemoPanel() {
JFreeChart chart = createChart(createDataset());
return new ChartPanel(chart);
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(String[] args) {
PieChart3DDemo3 demo = new PieChart3DDemo3("Pie Chart 3D Demo 3");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
/**
* A custom label generator (returns null for one item as a test).
*/
static class CustomLabelGenerator implements PieSectionLabelGenerator {
/**
* Generates a label for a pie section.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param key the section key (<code>null</code> not permitted).
*
* @return the label (possibly <code>null</code>).
*/
public String generateSectionLabel(PieDataset dataset, Comparable key) {
String result = null;
if (dataset != null) {
if (!key.equals("PHP")) {
result = key.toString();
}
}
return result;
}
public AttributedString generateAttributedSectionLabel(
PieDataset dataset, Comparable key) {
return null;
}
}
}
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