crosshairdemo3.java

在软件开发中用来绘制各种图表的源码

/* -------------------
 * CrosshairDemo3.java
 * -------------------
 * (C) Copyright 2003-2005, by Object Refinery Limited.
 *
 */

package demo;

import java.awt.BorderLayout;
import java.awt.Color;
import java.text.SimpleDateFormat;

import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.Range;
import org.jfree.data.time.Month;
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;

/**
 * A crosshair demo.
 */
public class CrosshairDemo3 extends ApplicationFrame {

    static class DemoPanel extends JPanel implements ChangeListener {
        
        private JFreeChart chart;
        
        private JSlider slider;
        
        /**
         * Creates a new demo panel.
         */
        public DemoPanel() {
            super(new BorderLayout());
            XYDataset dataset = createDataset();
            this.chart = createChart(dataset);
            ChartPanel chartPanel = new ChartPanel(this.chart);
            chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
            chartPanel.setMouseZoomable(true, false);
            
            JPanel controls = new JPanel(new BorderLayout());
            this.slider = new JSlider(0, 100, 50);
            this.slider.addChangeListener(this);
            controls.add(this.slider);
            
            add(chartPanel);
            add(controls, BorderLayout.SOUTH);
        }
        
        /**
         * Creates a chart.
         * 
         * @param dataset  a dataset.
         * 
         * @return A chart.
         */
        private JFreeChart createChart(XYDataset dataset) {

            JFreeChart c = ChartFactory.createTimeSeriesChart(
                "Legal & General Unit Trust Prices",
                "Date", "Price Per Unit",
                dataset,
                true,
                true,
                false
            );

            c.setBackgroundPaint(Color.white);

            XYPlot plot = (XYPlot) c.getPlot();
            plot.setBackgroundPaint(Color.lightGray);
            plot.setDomainGridlinePaint(Color.white);
            plot.setRangeGridlinePaint(Color.white);
            plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
            plot.setDomainCrosshairVisible(true);
            plot.setRangeCrosshairVisible(true);
            
            XYItemRenderer renderer = plot.getRenderer();
            if (renderer instanceof XYLineAndShapeRenderer) {
                XYLineAndShapeRenderer rr = (XYLineAndShapeRenderer) renderer;
                rr.setShapesVisible(true);
                rr.setShapesFilled(true);
            }
            
            DateAxis axis = (DateAxis) plot.getDomainAxis();
            axis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy"));
            
            return c;

        }
        
        /**
         * Creates a dataset, consisting of two series of monthly data.
         *
         * @return the dataset.
         */
        private XYDataset createDataset() {

            TimeSeries s1 = new TimeSeries(
                "L&G European Index Trust", Month.class
            );
            s1.add(new Month(2, 2001), 181.8);
            s1.add(new Month(3, 2001), 167.3);
            s1.add(new Month(4, 2001), 153.8);
            s1.add(new Month(5, 2001), 167.6);
            s1.add(new Month(6, 2001), 158.8);
            s1.add(new Month(7, 2001), 148.3);
            s1.add(new Month(8, 2001), 153.9);
            s1.add(new Month(9, 2001), 142.7);
            s1.add(new Month(10, 2001), 123.2);
            s1.add(new Month(11, 2001), 131.8);
            s1.add(new Month(12, 2001), 139.6);
            s1.add(new Month(1, 2002), 142.9);
            s1.add(new Month(2, 2002), 138.7);
            s1.add(new Month(3, 2002), 137.3);
            s1.add(new Month(4, 2002), 143.9);
            s1.add(new Month(5, 2002), 139.8);
            s1.add(new Month(6, 2002), 137.0);
            s1.add(new Month(7, 2002), 132.8);

            TimeSeries s2 = new TimeSeries("L&G UK Index Trust", Month.class);
            s2.add(new Month(2, 2001), 129.6);
            s2.add(new Month(3, 2001), 123.2);
            s2.add(new Month(4, 2001), 117.2);
            s2.add(new Month(5, 2001), 124.1);
            s2.add(new Month(6, 2001), 122.6);
            s2.add(new Month(7, 2001), 119.2);
            s2.add(new Month(8, 2001), 116.5);
            s2.add(new Month(9, 2001), 112.7);
            s2.add(new Month(10, 2001), 101.5);
            s2.add(new Month(11, 2001), 106.1);
            s2.add(new Month(12, 2001), 110.3);
            s2.add(new Month(1, 2002), 111.7);
            s2.add(new Month(2, 2002), 111.0);
            s2.add(new Month(3, 2002), 109.6);
            s2.add(new Month(4, 2002), 113.2);
            s2.add(new Month(5, 2002), 111.6);
            s2.add(new Month(6, 2002), 108.8);
            s2.add(new Month(7, 2002), 101.6);

            TimeSeriesCollection dataset = new TimeSeriesCollection();
            dataset.addSeries(s1);
            dataset.addSeries(s2);

            dataset.setDomainIsPointsInTime(true);

            return dataset;

        }
        
        /**
         * Handles a state change event.
         * 
         * @param event  the event.
         */
        public void stateChanged(ChangeEvent event) {
            int value = this.slider.getValue();
            XYPlot plot = this.chart.getXYPlot();
            ValueAxis domainAxis = plot.getDomainAxis();
            Range range = domainAxis.getRange();
            double c = domainAxis.getLowerBound() 
                + (value / 100.0) * range.getLength();    
            plot.setDomainCrosshairValue(c);
        }

    }
    
    /**
     * A demonstration application showing how to create a simple time series 
     * chart.  This example uses monthly data.
     *
     * @param title  the frame title.
     */
    public CrosshairDemo3(String title) {
        super(title);
        setContentPane(new DemoPanel());
    }
    
    /**
     * Creates a panel for the demo (used by SuperDemo.java).
     * 
     * @return A panel.
     */
    public static JPanel createDemoPanel() {
        return new DemoPanel();
    }
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        CrosshairDemo3 demo = new CrosshairDemo3("Crosshair Demo 3");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}