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.] * * ------------------------ * XYStepAreaChartDemo.java * ------------------------ * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors. * * Original Author: Matthias Rose (for Ablay & Fodi GmbH); * Contributor(s): David Gilbert (for Object Refinery Limited); * * $Id: XYStepAreaChartDemo.java,v 1.12 2004/04/26 19:12:04 taqua Exp $ * * Changes * ------- * 26-Sep-2003 : Copied XYAreaChartDemo --> XYStepAreaChartDemo * and adapted to test XYStepAreaRenderer (MR); * */ package org.jfree.chart.demo; import java.awt.BasicStroke; import java.awt.BorderLayout; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextField; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.Plot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYStepAreaRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; /** * A simple demonstration application showing how to create a step area chart. * * @author Matthias Rose */ public class XYStepAreaChartDemo extends ApplicationFrame implements ActionListener { /** Vertical orientation. */ private static final String ORIENT_VERT = "Plot vertical"; /** Horizontal orientation. */ private static final String ORIENT_HORIZ = "Plot horizontal"; /** Problem data. */ private static final Object[][] TEST_DATA = { // domain values, range values, may be null? { new Integer(1), new Integer(500), Boolean.TRUE }, { new Integer(2), new Integer(694) }, { new Integer(3), new Integer(-734) }, { new Integer(4), new Integer(453) }, { new Integer(5), new Integer(500), Boolean.TRUE }, { new Integer(6), new Integer(200) }, { new Integer(7), new Integer(550), Boolean.TRUE }, { new Integer(8), new Integer(-150), Boolean.TRUE }, { new Integer(9), new Integer(232) }, { new Integer(10), new Integer(734) }, { new Integer(11), new Integer(400), Boolean.TRUE }, }; /** The chart panel. */ private ChartPanel chartPanel; /** The data series. */ private XYSeries xySeries; /** The null values checkbox. */ private JCheckBox nullValuesCheckBox; /** The outline checkbox. */ private JCheckBox outlineCheckBox; /** The range base text field. */ private JTextField rangeBaseTextField; /** The orientation combobox. */ private JComboBox orientationComboBox; /** * Creates a new demo. * * @param title the frame title. */ public XYStepAreaChartDemo(final String title) { super(title); this.xySeries = new XYSeries("Some data"); for (int i = 0; i < TEST_DATA.length; i++) { this.xySeries.add((Integer) TEST_DATA[i][0], (Integer) TEST_DATA[i][1]); } final XYSeriesCollection dataset = new XYSeriesCollection(this.xySeries); final JFreeChart chart = createChart(dataset); this.chartPanel = new ChartPanel(chart); // allow zooming // this.chartPanel.setHorizontalZoom(true); // this.chartPanel.setVerticalZoom(true); // size this.chartPanel.setPreferredSize(new java.awt.Dimension(500, 270)); // make stroke more striking final Plot plot = this.chartPanel.getChart().getPlot(); plot.setOutlineStroke(new BasicStroke(2)); plot.setOutlinePaint(Color.magenta); // add some components to make options changable final JPanel main = new JPanel(new BorderLayout()); final JPanel optionsPanel = new JPanel(); final String[] options = { ORIENT_VERT, ORIENT_HORIZ }; this.orientationComboBox = new JComboBox(options); this.orientationComboBox.addActionListener(this); optionsPanel.add(this.orientationComboBox); this.outlineCheckBox = new JCheckBox("Outline"); this.outlineCheckBox.addActionListener(this); optionsPanel.add(this.outlineCheckBox); optionsPanel.add(new JLabel("Base")); this.rangeBaseTextField = new JTextField("0", 5); this.rangeBaseTextField.addActionListener(this); optionsPanel.add(this.rangeBaseTextField); this.nullValuesCheckBox = new JCheckBox("NULL values"); this.nullValuesCheckBox.addActionListener(this); optionsPanel.add(this.nullValuesCheckBox); main.add(optionsPanel, BorderLayout.SOUTH); main.add(this.chartPanel); setContentPane(main); } // **************************************************************************** // * 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. * // **************************************************************************** /** * Creates a chart. * * @param dataset the dataset. * * @return A chart. */ private JFreeChart createChart(final XYDataset dataset) { final JFreeChart chart = ChartFactory.createXYStepAreaChart("XY Step Area Chart Demo", "Domain (X)", "Range (Y)", dataset, PlotOrientation.VERTICAL, true, // legend true, // tool tips false // URLs ); // color final XYPlot plot = chart.getXYPlot(); plot.getRenderer().setSeriesPaint(0, Color.green); // fill shapes final XYStepAreaRenderer rend = (XYStepAreaRenderer) plot.getRenderer(); rend.setShapesFilled(true); return chart; } /** * Change options according to settings. * * @param evt the event. */ public void actionPerformed(final ActionEvent evt) { final Object source = evt.getSource(); if (source == this.nullValuesCheckBox) { final boolean withNulls = this.nullValuesCheckBox.isSelected(); for (int i = 0; i < TEST_DATA.length; i++) { Integer yVal = (Integer) TEST_DATA[i][1]; if (withNulls && TEST_DATA[i].length > 2) { yVal = null; } this.xySeries.getDataItem(i).setY(yVal); } } else if (source == this.outlineCheckBox) { final XYPlot plot = (XYPlot) this.chartPanel.getChart().getPlot(); ((XYStepAreaRenderer) plot.getRenderer()).setOutline(this.outlineCheckBox.isSelected()); } else if (source == this.rangeBaseTextField) { final double val = Double.parseDouble(this.rangeBaseTextField.getText()); final XYPlot plot = (XYPlot) this.chartPanel.getChart().getPlot(); final XYStepAreaRenderer rend = (XYStepAreaRenderer) plot.getRenderer(); rend.setRangeBase(val); } else if (source == this.orientationComboBox) { final XYPlot plot = (XYPlot) this.chartPanel.getChart().getPlot(); if (this.orientationComboBox.getSelectedItem() == ORIENT_HORIZ) { plot.setOrientation(PlotOrientation.HORIZONTAL); } else if (this.orientationComboBox.getSelectedItem() == ORIENT_VERT) { plot.setOrientation(PlotOrientation.VERTICAL); } } this.chartPanel.repaint(); } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args) { final XYStepAreaChartDemo demo = new XYStepAreaChartDemo("Step Area XY Chart Demo"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); } }