multipleaxisdemo2.java

在软件开发中用来绘制各种图表的源码

/* ----------------------
 * MultipleAxisDemo2.java
 * ----------------------
 * (C) Copyright 2003-2005, by Object Refinery Limited.
 *
 */

package demo;

import java.awt.Color;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.time.Minute;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.RefineryUtilities;

/**
 * An example of....
 */
public class MultipleAxisDemo2 extends ApplicationFrame {

    /**
     * A demonstration application showing how to create a time series chart 
     * with muliple axes.
     *
     * @param title  the frame title.
     */
    public MultipleAxisDemo2(String title) {

        super(title);
        JFreeChart chart = createChart();
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(600, 270));
        setContentPane(chartPanel);

    }

    /**
     * Creates the demo chart.
     * 
     * @return The chart.
     */
    private JFreeChart createChart() {

        XYDataset dataset1 = createDataset(
            "Series 1", 100.0, new Minute(), 200
        );
        
        JFreeChart chart = ChartFactory.createTimeSeriesChart(
            "Multiple Axis Demo 2", 
            "Time of Day", 
            "Primary Range Axis",
            dataset1, 
            true, 
            true, 
            false
        );

        chart.setBackgroundPaint(Color.white);
        XYPlot plot = chart.getXYPlot();
        plot.setOrientation(PlotOrientation.VERTICAL);
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinePaint(Color.white);
        plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
        
        XYItemRenderer renderer = plot.getRenderer();
        renderer.setPaint(Color.black);
       
        // DOMAIN AXIS 2
        NumberAxis xAxis2 = new NumberAxis("Domain Axis 2");
        xAxis2.setAutoRangeIncludesZero(false);
        plot.setDomainAxis(1, xAxis2);
       
        // RANGE AXIS 2
        NumberAxis yAxis2 = new NumberAxis("Range Axis 2");
        plot.setRangeAxis(1, yAxis2);
        plot.setRangeAxisLocation(1, AxisLocation.BOTTOM_OR_RIGHT);

        XYDataset dataset2 = createDataset(
            "Series 2", 1000.0, new Minute(), 170
        );
        plot.setDataset(1, dataset2);    
        plot.mapDatasetToDomainAxis(1, 1);
        plot.mapDatasetToRangeAxis(1, 1);    
        
        return chart;
        
    }
    
    /**
     * Creates a sample dataset.
     * 
     * @param name  the dataset name.
     * @param base  the starting value.
     * @param start  the starting period.
     * @param count  the number of values to generate.
     *
     * @return The dataset.
     */
    private XYDataset createDataset(String name, double base, 
                                    RegularTimePeriod start, int count) {

        TimeSeries series = new TimeSeries(name, start.getClass());
        RegularTimePeriod period = start;
        double value = base;
        for (int i = 0; i < count; i++) {
            series.add(period, value);    
            period = period.next();
            value = value * (1 + (Math.random() - 0.495) / 10.0);
        }

        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(series);

        return dataset;

    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        MultipleAxisDemo2 demo = new MultipleAxisDemo2("Multiple Axis Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}