scatterplotdemo2.java

在软件开发中用来绘制各种图表的源码

/* ---------------------
 * ScatterPlotDemo2.java
 * ---------------------
 * (C) Copyright 2002-2006, by Object Refinery Limited.
 *
 */

package demo;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYDotRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A demo scatter plot.
 */
public class ScatterPlotDemo2 extends ApplicationFrame {

    /**
     * A demonstration application showing a scatter plot.
     *
     * @param title  the frame title.
     */
    public ScatterPlotDemo2(String title) {
        super(title);
        JPanel chartPanel = createDemoPanel();
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);
    }

    private static JFreeChart createChart(XYDataset dataset) {
        JFreeChart chart = ChartFactory.createScatterPlot("Scatter Plot Demo 2",
                "X", "Y", dataset, PlotOrientation.VERTICAL, true, true, false);
 
        XYPlot plot = chart.getXYPlot();
        plot.setRenderer(new XYDotRenderer());
        NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis();
        domainAxis.setAutoRangeIncludesZero(false);
        return chart;
    }

    /**
     * Creates a panel for the demo (used by SuperDemo.java).
     * 
     * @return A panel.
     */
    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(new SampleXYDataset2());
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setVerticalAxisTrace(true);
        chartPanel.setHorizontalAxisTrace(true);
        // popup menu conflicts with axis trace
        chartPanel.setPopupMenu(null);
        chartPanel.setDomainZoomable(true);
        chartPanel.setRangeZoomable(true);
        return chartPanel;
    }
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        ScatterPlotDemo2 demo = new ScatterPlotDemo2("Scatter Plot Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}