dynamicdatademo2.java

JfreeChart 常用图表例子

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------------
 * DynamicDataDemo2.java
 * ---------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited).
 * Contributor(s):   -;
 *
 * $Id: DynamicDataDemo2.java,v 1.10 2004/04/27 14:53:09 mungady Exp $
 *
 * Changes
 * -------
 * 01-Sep-2003 : Version 1, based on DynamicDataDemo (DG);
 * 27-Apr-2004 : Updated for changes to the XYPlot class (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
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.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.DefaultXYItemRenderer;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.Spacer;

/**
 * A demonstration application showing a time series chart where you can dynamically add
 * (random) data by clicking on a button.
 *
 */
public class DynamicDataDemo2 extends ApplicationFrame implements ActionListener {

    /** Series 1. */
    private TimeSeries series1;
    
    /** Series 2. */
    private TimeSeries series2;

    /** The most recent value added to series 1. */
    private double lastValue1 = 100.0;

    /** The most recent value added to series 2. */
    private double lastValue2 = 500.0;

    /**
     * Constructs a new demonstration application.
     *
     * @param title  the frame title.
     */
    public DynamicDataDemo2(final String title) {

        super(title);
        this.series1 = new TimeSeries("Random 1", Millisecond.class);
        this.series2 = new TimeSeries("Random 2", Millisecond.class);
        final TimeSeriesCollection dataset1 = new TimeSeriesCollection(this.series1);
        final TimeSeriesCollection dataset2 = new TimeSeriesCollection(this.series2);
        final JFreeChart chart = ChartFactory.createTimeSeriesChart(
            "Dynamic Data Demo 2", "Time", "Value", dataset1, true, true, false
        );
        chart.setBackgroundPaint(Color.white);
        
        final XYPlot plot = chart.getXYPlot();
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinePaint(Color.white);
  //      plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 4, 4, 4, 4));
        final ValueAxis axis = plot.getDomainAxis();
        axis.setAutoRange(true);
        axis.setFixedAutoRange(60000.0);  // 60 seconds

        plot.setDataset(1, dataset2);
        final NumberAxis rangeAxis2 = new NumberAxis("Range Axis 2");
        rangeAxis2.setAutoRangeIncludesZero(false);
        plot.setRenderer(1, new DefaultXYItemRenderer());
        plot.setRangeAxis(1, rangeAxis2);
        plot.mapDatasetToRangeAxis(1, 1);
        
        final JPanel content = new JPanel(new BorderLayout());

        final ChartPanel chartPanel = new ChartPanel(chart);
        content.add(chartPanel);
        
        final JButton button1 = new JButton("Add To Series 1");
        button1.setActionCommand("ADD_DATA_1");
        button1.addActionListener(this);
        
        final JButton button2 = new JButton("Add To Series 2");
        button2.setActionCommand("ADD_DATA_2");
        button2.addActionListener(this);

        final JButton button3 = new JButton("Add To Both");
        button3.setActionCommand("ADD_BOTH");
        button3.addActionListener(this);

        final JPanel buttonPanel = new JPanel(new FlowLayout());
        buttonPanel.add(button1);
        buttonPanel.add(button2);
        buttonPanel.add(button3);
        
        content.add(buttonPanel, BorderLayout.SOUTH);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(content);

    }

    // ****************************************************************************
    // * JFREECHART DEVELOPER GUIDE                                               *
    // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
    // * to purchase from Object Refinery Limited:                                *
    // *                                                                          *
    // * http://www.object-refinery.com/jfreechart/guide.html                     *
    // *                                                                          *
    // * Sales are used to provide funding for the JFreeChart project - please    * 
    // * support us so that we can continue developing free software.             *
    // ****************************************************************************
    
    /**
     * Handles a click on the button by adding new (random) data.
     *
     * @param e  the action event.
     */
    public void actionPerformed(final ActionEvent e) {
        boolean add1 = false;
        boolean add2 = false;
        if (e.getActionCommand().equals("ADD_DATA_1")) {
            add1 = true;
        }
        else if (e.getActionCommand().equals("ADD_DATA_2")) {
            add2 = true;
        }
        else if (e.getActionCommand().equals("ADD_BOTH")) {
            add1 = true;
            add2 = true;
        }
        if (add1) {
            final double factor = 0.90 + 0.2 * Math.random();
            this.lastValue1 = this.lastValue1 * factor;
            final Millisecond now = new Millisecond();
            System.out.println("Now = " + now.toString());
            this.series1.add(new Millisecond(), this.lastValue1);
        }
        if (add2) {
            final double factor = 0.90 + 0.2 * Math.random();
            this.lastValue2 = this.lastValue2 * factor;
            final Millisecond now = new Millisecond();
            System.out.println("Now = " + now.toString());
            this.series2.add(new Millisecond(), this.lastValue2);
        }
    }

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

        final DynamicDataDemo2 demo = new DynamicDataDemo2("Dynamic Data Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}