Java tutorial
package edu.utexas.ece.pharos.proteus3.sensors; /* =========================================================== * 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.] * * ------------------- * LineChartDemo6.java * ------------------- * (C) Copyright 2004, by Object Refinery Limited and Contributors. * * Original Author: David Gilbert (for Object Refinery Limited); * Contributor(s): -; * * $Id: LineChartDemo6.java,v 1.5 2004/04/26 19:11:55 taqua Exp $ * * Changes * ------- * 27-Jan-2004 : Version 1 (DG); * */ import java.awt.Color; 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.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.data.Range; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; //import org.jfree.ui.Spacer; import org.ros.message.MessageListener; //import edu.utexas.ece.pharos.logger.Logger; import proteus3_compass.CompassMsg; /** * A simple demonstration application showing how to create a line chart using data from an * {@link XYDataset}. * */ public class CompassChartGUI extends ApplicationFrame implements MessageListener<CompassMsg> { private static final long serialVersionUID = 4854956736415948890L; XYSeries dataSeries; long startTime = System.currentTimeMillis(); /** * Creates a new demo. * * @param title the frame title. */ public CompassChartGUI(final String title) { super(title); final XYDataset dataset = createDataset(); final JFreeChart chart = createChart(dataset); final XYPlot plot = chart.getXYPlot(); ValueAxis axis = plot.getDomainAxis(); axis.setAutoRange(true); axis.setFixedAutoRange(60); // 60 seconds final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); setContentPane(chartPanel); // new Thread(new ChartUpdater(chart.getXYPlot())).start(); } @Override public void onNewMessage(CompassMsg message) { double time = (System.currentTimeMillis() - startTime) / 1000.0; dataSeries.add(time, message.getHeading()); } // public void addData(double time, double value) { // dataSeries.add(time, value); // } // private class ChartUpdater implements Runnable { // XYPlot plot; // // public ChartUpdater(XYPlot plot) { // this.plot = plot; // } // // public void run() { // synchronized(this) { // try { // this.wait(1000*4); // } catch (InterruptedException e) { // e.printStackTrace(); // } // } // // XYSeries series1 = new XYSeries("First"); // series1.add(1.0, 8.0); // series1.add(2.0, 7.0); // series1.add(3.0, 6.0); // series1.add(4.0, 5.0); // series1.add(5.0, 4.0); // series1.add(6.0, 3.0); // series1.add(7.0, 2.0); // series1.add(8.0, 1.0); // XYSeriesCollection dataset = new XYSeriesCollection(); // dataset.addSeries(series1); // plot.setDataset(dataset); // series1.add(9.0,2.0); // series1.add(50,1.4); // } // } /** * Creates a sample dataset. * * @return a sample dataset. */ private XYDataset createDataset() { dataSeries = new XYSeries("Compass Measurements"); // series1.add(2.0, 1.0); // series1.add(3.0, 2.0); // series1.add(4.0, 3.0); // series1.add(5.0, 4.0); // series1.add(6.0, 5.0); // series1.add(7.0, 6.0); // series1.add(8.0, 7.0); // series1.add(9.0, 8.0); final XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(dataSeries); return dataset; } /** * Creates a chart. * * @param dataset the data for the chart. * * @return a chart. */ private JFreeChart createChart(final XYDataset dataset) { // create the chart... final JFreeChart chart = ChartFactory.createXYLineChart("Proteus III Compass Measurements", // chart title "Time (s)", // x axis label "Angle (degrees)", // y axis label dataset, // data PlotOrientation.VERTICAL, false, // include legend true, // tooltips false // urls ); // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART... chart.setBackgroundPaint(Color.white); // final StandardLegend legend = (StandardLegend) chart.getLegend(); // legend.setDisplaySeriesShapes(true); // get a reference to the plot for further customization... final XYPlot plot = chart.getXYPlot(); plot.setBackgroundPaint(Color.lightGray); // plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0)); plot.setDomainGridlinePaint(Color.white); plot.setRangeGridlinePaint(Color.white); final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(); renderer.setSeriesLinesVisible(0, false); renderer.setSeriesShapesVisible(1, false); plot.setRenderer(renderer); final NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis(); domainAxis.setRange(new Range(0, 140)); final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis(); // change the auto tick unit selection to integer units only... // rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); //rangeAxis.setRange(new Range(-Math.PI, Math.PI)); rangeAxis.setRange(new Range(-180, 180)); return chart; } // **************************************************************************** // * 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. * // **************************************************************************** /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final CompassChartGUI demo = new CompassChartGUI("Proteus III Compass Data vs. Time"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }