DynamicDataDemo.java Source code

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Here is the source code for DynamicDataDemo.java

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/* ===========================================================
 * 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.]
 *
 * --------------------
 * DynamicDataDemo.java
 * --------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited).
 * Contributor(s):   -;
 *
 * $Id: DynamicDataDemo.java,v 1.12 2004/05/07 16:09:03 mungady Exp $
 *
 * Changes
 * -------
 * 28-Mar-2002 : Version 1 (DG);
 *
 */

import java.awt.BorderLayout;
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.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.time.Millisecond;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;

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

    /** The time series data. */
    private TimeSeries series;
    final JPanel content;
    /** The most recent value added. */
    private double lastValue = 0.0;

    /**
     * Constructs a new demonstration application.
     *
     * @param title  the frame title.
     */
    public DynamicDataDemo(final String title, String xcoor, String ycoor, String data) {

        super(title);
        this.series = new TimeSeries(data, Millisecond.class);
        final TimeSeriesCollection dataset = new TimeSeriesCollection(this.series);
        final JFreeChart chart = createChart(dataset, title, xcoor, ycoor);

        final ChartPanel chartPanel = new ChartPanel(chart);
        final JButton button = new JButton("Add New Data Item");
        button.setActionCommand("ADD_DATA");
        button.addActionListener(this);

        content = new JPanel(new BorderLayout());
        content.add(chartPanel);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        //setContentPane(content);

    }

    public void updateParam(double value) {
        this.lastValue = value;
    }

    /**
     * Creates a sample chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return A sample chart.
     */
    private JFreeChart createChart(final XYDataset dataset, String title, String xcoor, String ycoor) {
        final JFreeChart result = ChartFactory.createTimeSeriesChart(title, xcoor, ycoor, dataset, true, true,
                false);
        final XYPlot plot = result.getXYPlot();
        ValueAxis axis = plot.getDomainAxis();
        axis.setAutoRange(true);
        axis.setFixedAutoRange(60000.0); // 60 seconds
        axis = plot.getRangeAxis();
        axis.setRange(0.0, 500.0);
        return result;
    }

    /**
     * Handles a click on the button by adding new (random) data.
     *
     * @param e  the action event.
     */
    public void actionPerformed(final ActionEvent e) {
        if (e.getActionCommand().equals("ADD_DATA")) {
            final double factor = 0.90 + 0.2 * Math.random();
            this.lastValue = this.lastValue * factor;
            final Millisecond now = new Millisecond();
            System.out.println("Now = " + now.toString());
            this.series.add(new Millisecond(), this.lastValue);
        }
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        while (true) {
            final Millisecond now = new Millisecond();
            // System.out.println("Now = " + now.toString());
            this.series.add(new Millisecond(), this.lastValue);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */

}