    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
    006     *
    007     * Project Info:  http://www.jfree.org/jfreechart/index.html
    008     *
    009     * This library is free software; you can redistribute it and/or modify it
    010     * under the terms of the GNU Lesser General Public License as published by
    011     * the Free Software Foundation; either version 2.1 of the License, or
    012     * (at your option) any later version.
    013     *
    014     * This library is distributed in the hope that it will be useful, but
    015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017     * License for more details.
    018     *
    019     * You should have received a copy of the GNU Lesser General Public
    020     * License along with this library; if not, write to the Free Software
    021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022     * USA.
    023     *
    024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025     * in the United States and other countries.]
    026     *
    027     * ------------------
    028     * BarChartDemo1.java
    029     * ------------------
    030     * (C) Copyright 2003-2009, by Object Refinery Limited and Contributors.
    031     *
    032     * Original Author:  David Gilbert (for Object Refinery Limited);
    033     * Contributor(s):   ;
    034     *
    035     * Changes
    036     * -------
    037     * 09-Mar-2005 : Version 1 (DG);
    038     *
    039     */
    040
    041    package org.jfree.chart.demo;
    042
    043    import java.awt.Color;
    044    import java.awt.Dimension;
    045    import java.awt.GradientPaint;
    046
    047    import org.jfree.chart.ChartFactory;
    048    import org.jfree.chart.ChartPanel;
    049    import org.jfree.chart.JFreeChart;
    050    import org.jfree.chart.axis.CategoryAxis;
    051    import org.jfree.chart.axis.CategoryLabelPositions;
    052    import org.jfree.chart.axis.NumberAxis;
    053    import org.jfree.chart.plot.CategoryPlot;
    054    import org.jfree.chart.plot.PlotOrientation;
    055    import org.jfree.chart.renderer.category.BarRenderer;
    056    import org.jfree.data.category.CategoryDataset;
    057    import org.jfree.data.category.DefaultCategoryDataset;
    058    import org.jfree.ui.ApplicationFrame;
    059    import org.jfree.ui.RefineryUtilities;
    060
    061    /**
    062     * A simple demonstration application showing how to create a bar chart.
    063     */
    064    public class BarChartDemo1 extends ApplicationFrame {
    065
    066        /**
    067         * Creates a new demo instance.
    068         *
    069         * @param title  the frame title.
    070         */
    071        public BarChartDemo1(String title) {
    072            super(title);
    073            CategoryDataset dataset = createDataset();
    074            JFreeChart chart = createChart(dataset);
    075            ChartPanel chartPanel = new ChartPanel(chart);
    076            chartPanel.setFillZoomRectangle(true);
    077            chartPanel.setMouseWheelEnabled(true);
    078            chartPanel.setPreferredSize(new Dimension(500, 270));
    079            setContentPane(chartPanel);
    080        }
    081
    082        /**
    083         * Returns a sample dataset.
    084         *
    085         * @return The dataset.
    086         */
    087        private static CategoryDataset createDataset() {
    088
    089            // row keys...
    090            String series1 = "First";
    091            String series2 = "Second";
    092            String series3 = "Third";
    093
    094            // column keys...
    095            String category1 = "Category 1";
    096            String category2 = "Category 2";
    097            String category3 = "Category 3";
    098            String category4 = "Category 4";
    099            String category5 = "Category 5";
    100
    101            // create the dataset...
    102            DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    103
    104            dataset.addValue(1.0, series1, category1);
    105            dataset.addValue(4.0, series1, category2);
    106            dataset.addValue(3.0, series1, category3);
    107            dataset.addValue(5.0, series1, category4);
    108            dataset.addValue(5.0, series1, category5);
    109
    110            dataset.addValue(5.0, series2, category1);
    111            dataset.addValue(7.0, series2, category2);
    112            dataset.addValue(6.0, series2, category3);
    113            dataset.addValue(8.0, series2, category4);
    114            dataset.addValue(4.0, series2, category5);
    115
    116            dataset.addValue(4.0, series3, category1);
    117            dataset.addValue(3.0, series3, category2);
    118            dataset.addValue(2.0, series3, category3);
    119            dataset.addValue(3.0, series3, category4);
    120            dataset.addValue(6.0, series3, category5);
    121
    122            return dataset;
    123
    124        }
    125
    126        /**
    127         * Creates a sample chart.
    128         *
    129         * @param dataset  the dataset.
    130         *
    131         * @return The chart.
    132         */
    133        private static JFreeChart createChart(CategoryDataset dataset) {
    134
    135            // create the chart...
    136            JFreeChart chart = ChartFactory.createBarChart(
    137                "Bar Chart Demo 1",       // chart title
    138                "Category",               // domain axis label
    139                "Value",                  // range axis label
    140                dataset,                  // data
    141                PlotOrientation.VERTICAL, // orientation
    142                true,                     // include legend
    143                true,                     // tooltips?
    144                false                     // URLs?
    145            );
    146
    147            // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
    148
    149            // set the background color for the chart...
    150            chart.setBackgroundPaint(Color.white);
    151
    152            // get a reference to the plot for further customisation...
    153            CategoryPlot plot = (CategoryPlot) chart.getPlot();
    154
    155            // ******************************************************************
    156            //  More than 150 demo applications are included with the JFreeChart
    157            //  Developer Guide...for more information, see:
    158            //
    159            //  >   http://www.object-refinery.com/jfreechart/guide.html
    160            //
    161            // ******************************************************************
    162
    163            // set the range axis to display integers only...
    164            NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    165            rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    166
    167            // disable bar outlines...
    168            BarRenderer renderer = (BarRenderer) plot.getRenderer();
    169            renderer.setDrawBarOutline(false);
    170
    171            // set up gradient paints for series...
    172            GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue,
    173                    0.0f, 0.0f, new Color(0, 0, 64));
    174            GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green,
    175                    0.0f, 0.0f, new Color(0, 64, 0));
    176            GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red,
    177                    0.0f, 0.0f, new Color(64, 0, 0));
    178            renderer.setSeriesPaint(0, gp0);
    179            renderer.setSeriesPaint(1, gp1);
    180            renderer.setSeriesPaint(2, gp2);
    181
    182            CategoryAxis domainAxis = plot.getDomainAxis();
    183            domainAxis.setCategoryLabelPositions(
    184                    CategoryLabelPositions.createUpRotationLabelPositions(
    185                            Math.PI / 6.0));
    186            // OPTIONAL CUSTOMISATION COMPLETED.
    187
    188            return chart;
    189
    190        }
    191
    192        /**
    193         * Starting point for the demonstration application.
    194         *
    195         * @param args  ignored.
    196         */
    197        public static void main(String[] args) {
    198            BarChartDemo1 demo = new BarChartDemo1("Bar Chart Demo 1");
    199            demo.pack();
    200            RefineryUtilities.centerFrameOnScreen(demo);
    201            demo.setVisible(true);
    202        }
    203
    204    }