piechartdemo7.java

来自「Jfreechart 源码例子 是和jfreechart developmen」· Java 代码 · 共 82 行

package demo;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.NumberFormat;
import javax.swing.JPanel;
import javax.swing.Timer;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieSectionLabelGenerator;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

public class PieChartDemo7 extends ApplicationFrame
{
  public PieChartDemo7(String paramString)
  {
    super(paramString);
    setContentPane(createDemoPanel());
  }

  private static PieDataset createDataset(int paramInt)
  {
    DefaultPieDataset localDefaultPieDataset = new DefaultPieDataset();
    for (int i = 0; i < paramInt; ++i)
    {
      double d = 100.0D * Math.random();
      localDefaultPieDataset.setValue("Section " + i, d);
    }
    return localDefaultPieDataset;
  }

  public static JPanel createDemoPanel()
  {
    PieDataset localPieDataset = createDataset(14);
    JFreeChart localJFreeChart = ChartFactory.createPieChart("Pie Chart Demo 7", localPieDataset, false, true, false);
    PiePlot localPiePlot = (PiePlot)localJFreeChart.getPlot();
    localPiePlot.setCircular(true);
    localPiePlot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0} = {2}", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance()));
    localPiePlot.setNoDataMessage("No data available");
    ChartPanel localChartPanel = new ChartPanel(localJFreeChart);
    localChartPanel.setPreferredSize(new Dimension(500, 270));
    Rotator localRotator = new Rotator(localPiePlot);
    localRotator.start();
    return localChartPanel;
  }

  public static void main(String[] paramArrayOfString)
  {
    PieChartDemo7 localPieChartDemo7 = new PieChartDemo7("JFreeChart: PieChartDemo7.java");
    localPieChartDemo7.pack();
    RefineryUtilities.centerFrameOnScreen(localPieChartDemo7);
    localPieChartDemo7.setVisible(true);
  }

  static class Rotator extends Timer
  implements ActionListener
  {
    private PiePlot plot;
    private int angle = 270;

    Rotator(PiePlot paramPiePlot)
    {
      super(100, null);
      this.plot = paramPiePlot;
      addActionListener(this);
    }

    public void actionPerformed(ActionEvent paramActionEvent)
    {
      this.plot.setStartAngle(this.angle);
      this.angle += 1;
      if (this.angle == 360)
        this.angle = 0;
    }
  }
}