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.] * * -------------------------- * SecondaryDatasetDemo1.java * -------------------------- * (C) Copyright 2004, by Object Refinery Limited. * * Original Author: David Gilbert (for Object Refinery Limited). * Contributor(s): -; * * $Id: SecondaryDatasetDemo1.java,v 1.3 2004/03/25 13:45:04 mungady Exp $ * * Changes * ------- * 30-Jan-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.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.StandardXYItemRenderer; import org.jfree.data.time.Day; import org.jfree.data.time.RegularTimePeriod; 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 demo showing the addition and removal of secondary datasets / renderers. * * @author David Gilbert */ public class SecondaryDatasetDemo1 extends ApplicationFrame implements ActionListener { /** The plot. */ private XYPlot plot; /** The index of the last dataset added. */ private int secondaryDatasetIndex = -1; /** * Constructs a new demonstration application. * * @param title the frame title. */ public SecondaryDatasetDemo1(String title) { super(title); TimeSeriesCollection dataset1 = createRandomDataset("Series 1"); JFreeChart chart = ChartFactory.createTimeSeriesChart("Secondary Dataset Demo 1", "Time", "Value", dataset1, true, true, false); chart.setBackgroundPaint(Color.white); this.plot = chart.getXYPlot(); this.plot.setBackgroundPaint(Color.lightGray); this.plot.setDomainGridlinePaint(Color.white); this.plot.setRangeGridlinePaint(Color.white); this.plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 4, 4, 4, 4)); ValueAxis axis = this.plot.getDomainAxis(); axis.setAutoRange(true); NumberAxis rangeAxis2 = new NumberAxis("Range Axis 2"); rangeAxis2.setAutoRangeIncludesZero(false); JPanel content = new JPanel(new BorderLayout()); ChartPanel chartPanel = new ChartPanel(chart); content.add(chartPanel); JButton button1 = new JButton("Add Dataset"); button1.setActionCommand("ADD_DATASET"); button1.addActionListener(this); JButton button2 = new JButton("Remove Dataset"); button2.setActionCommand("REMOVE_DATASET"); button2.addActionListener(this); JPanel buttonPanel = new JPanel(new FlowLayout()); buttonPanel.add(button1); buttonPanel.add(button2); content.add(buttonPanel, BorderLayout.SOUTH); chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); setContentPane(content); } /** * Creates a random dataset. * * @param name the series name. * * @return The dataset. */ private TimeSeriesCollection createRandomDataset(String name) { TimeSeries series = new TimeSeries(name); double value = 100.0; RegularTimePeriod t = new Day(); for (int i = 0; i < 50; i++) { series.add(t, value); t = t.next(); value = value * (1.0 + Math.random() / 100); } return new TimeSeriesCollection(series); } // **************************************************************************** // * 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(ActionEvent e) { if (e.getActionCommand().equals("ADD_DATASET")) { if (this.secondaryDatasetIndex < 19) { this.secondaryDatasetIndex++; this.plot.setSecondaryDataset(this.secondaryDatasetIndex, createRandomDataset("S" + this.secondaryDatasetIndex)); this.plot.setSecondaryRenderer(this.secondaryDatasetIndex, new StandardXYItemRenderer()); } } else if (e.getActionCommand().equals("REMOVE_DATASET")) { if (this.secondaryDatasetIndex >= 0) { this.plot.setSecondaryDataset(this.secondaryDatasetIndex, null); this.plot.setSecondaryRenderer(this.secondaryDatasetIndex, null); this.secondaryDatasetIndex--; } } } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(String[] args) { SecondaryDatasetDemo1 demo = new SecondaryDatasetDemo1("Secondary Dataset Demo 1"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }