Java tutorial
/* =========================================================== * 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.] * * --------------------- * DynamicDataDemo3.java * --------------------- * (C) Copyright 2004, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited). * Contributor(s): -; * * $Id: DynamicDataDemo3.java,v 1.5 2004/04/26 19:11:54 taqua Exp $ * * Changes * ------- * 02-Mar-2004 : Version 1 (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.BorderFactory; import javax.swing.JButton; import javax.swing.JPanel; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.CombinedDomainXYPlot; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; 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 DynamicDataDemo3 extends ApplicationFrame implements ActionListener { /** The number of subplots. */ public static final int SUBPLOT_COUNT = 3; /** The datasets. */ private TimeSeriesCollection[] datasets; /** The most recent value added to series 1. */ private double[] lastValue = new double[SUBPLOT_COUNT]; /** * Constructs a new demonstration application. * * @param title the frame title. */ public DynamicDataDemo3(final String title) { super(title); final CombinedDomainXYPlot plot = new CombinedDomainXYPlot(new DateAxis("Time")); this.datasets = new TimeSeriesCollection[SUBPLOT_COUNT]; for (int i = 0; i < SUBPLOT_COUNT; i++) { this.lastValue[i] = 100.0; final TimeSeries series = new TimeSeries("Random " + i, Millisecond.class); this.datasets[i] = new TimeSeriesCollection(series); final NumberAxis rangeAxis = new NumberAxis("Y" + i); rangeAxis.setAutoRangeIncludesZero(false); final XYPlot subplot = new XYPlot(this.datasets[i], null, rangeAxis, new StandardXYItemRenderer()); subplot.setBackgroundPaint(Color.lightGray); subplot.setDomainGridlinePaint(Color.white); subplot.setRangeGridlinePaint(Color.white); plot.add(subplot); } final JFreeChart chart = new JFreeChart("Dynamic Data Demo 3", plot); // chart.getLegend().setAnchor(Legend.EAST); chart.setBorderPaint(Color.black); chart.setBorderVisible(true); chart.setBackgroundPaint(Color.white); 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 final JPanel content = new JPanel(new BorderLayout()); final ChartPanel chartPanel = new ChartPanel(chart); content.add(chartPanel); final JPanel buttonPanel = new JPanel(new FlowLayout()); for (int i = 0; i < SUBPLOT_COUNT; i++) { final JButton button = new JButton("Series " + i); button.setActionCommand("ADD_DATA_" + i); button.addActionListener(this); buttonPanel.add(button); } final JButton buttonAll = new JButton("ALL"); buttonAll.setActionCommand("ADD_ALL"); buttonAll.addActionListener(this); buttonPanel.add(buttonAll); content.add(buttonPanel, BorderLayout.SOUTH); chartPanel.setPreferredSize(new java.awt.Dimension(500, 470)); chartPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); 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) { for (int i = 0; i < SUBPLOT_COUNT; i++) { if (e.getActionCommand().endsWith(String.valueOf(i))) { final Millisecond now = new Millisecond(); System.out.println("Now = " + now.toString()); this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random()); this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]); } } if (e.getActionCommand().equals("ADD_ALL")) { final Millisecond now = new Millisecond(); System.out.println("Now = " + now.toString()); for (int i = 0; i < SUBPLOT_COUNT; i++) { this.lastValue[i] = this.lastValue[i] * (0.90 + 0.2 * Math.random()); this.datasets[i].getSeries(0).add(new Millisecond(), this.lastValue[i]); } } } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final DynamicDataDemo3 demo = new DynamicDataDemo3("Dynamic Data Demo 3"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }