    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2007, 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 2003-2007, 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, false);
    076            chartPanel.setPreferredSize(new Dimension(500, 270));
    077            setContentPane(chartPanel);
    078        }
    079
    080        /**
    081         * Returns a sample dataset.
    082         *
    083         * @return The dataset.
    084         */
    085        private static CategoryDataset createDataset() {
    086
    087            // row keys...
    088            String series1 = "First";
    089            String series2 = "Second";
    090            String series3 = "Third";
    091
    092            // column keys...
    093            String category1 = "Category 1";
    094            String category2 = "Category 2";
    095            String category3 = "Category 3";
    096            String category4 = "Category 4";
    097            String category5 = "Category 5";
    098
    099            // create the dataset...
    100            DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    101
    102            dataset.addValue(1.0, series1, category1);
    103            dataset.addValue(4.0, series1, category2);
    104            dataset.addValue(3.0, series1, category3);
    105            dataset.addValue(5.0, series1, category4);
    106            dataset.addValue(5.0, series1, category5);
    107
    108            dataset.addValue(5.0, series2, category1);
    109            dataset.addValue(7.0, series2, category2);
    110            dataset.addValue(6.0, series2, category3);
    111            dataset.addValue(8.0, series2, category4);
    112            dataset.addValue(4.0, series2, category5);
    113
    114            dataset.addValue(4.0, series3, category1);
    115            dataset.addValue(3.0, series3, category2);
    116            dataset.addValue(2.0, series3, category3);
    117            dataset.addValue(3.0, series3, category4);
    118            dataset.addValue(6.0, series3, category5);
    119
    120            return dataset;
    121
    122        }
    123
    124        /**
    125         * Creates a sample chart.
    126         *
    127         * @param dataset  the dataset.
    128         *
    129         * @return The chart.
    130         */
    131        private static JFreeChart createChart(CategoryDataset dataset) {
    132
    133            // create the chart...
    134            JFreeChart chart = ChartFactory.createBarChart(
    135                "Bar Chart Demo 1",       // chart title
    136                "Category",               // domain axis label
    137                "Value",                  // range axis label
    138                dataset,                  // data
    139                PlotOrientation.VERTICAL, // orientation
    140                true,                     // include legend
    141                true,                     // tooltips?
    142                false                     // URLs?
    143            );
    144
    145            // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
    146
    147            // set the background color for the chart...
    148            chart.setBackgroundPaint(Color.white);
    149
    150            // get a reference to the plot for further customisation...
    151            CategoryPlot plot = (CategoryPlot) chart.getPlot();
    152            plot.setBackgroundPaint(Color.lightGray);
    153            plot.setDomainGridlinePaint(Color.white);
    154            plot.setDomainGridlinesVisible(true);
    155            plot.setRangeGridlinePaint(Color.white);
    156
    157            // ******************************************************************
    158            //  More than 150 demo applications are included with the JFreeChart
    159            //  Developer Guide...for more information, see:
    160            //
    161            //  >   http://www.object-refinery.com/jfreechart/guide.html
    162            //
    163            // ******************************************************************
    164
    165            // set the range axis to display integers only...
    166            final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
    167            rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    168
    169            // disable bar outlines...
    170            BarRenderer renderer = (BarRenderer) plot.getRenderer();
    171            renderer.setDrawBarOutline(false);
    172
    173            // set up gradient paints for series...
    174            GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue,
    175                    0.0f, 0.0f, new Color(0, 0, 64));
    176            GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green,
    177                    0.0f, 0.0f, new Color(0, 64, 0));
    178            GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red,
    179                    0.0f, 0.0f, new Color(64, 0, 0));
    180            renderer.setSeriesPaint(0, gp0);
    181            renderer.setSeriesPaint(1, gp1);
    182            renderer.setSeriesPaint(2, gp2);
    183
    184            CategoryAxis domainAxis = plot.getDomainAxis();
    185            domainAxis.setCategoryLabelPositions(
    186                    CategoryLabelPositions.createUpRotationLabelPositions(
    187                            Math.PI / 6.0));
    188            // OPTIONAL CUSTOMISATION COMPLETED.
    189
    190            return chart;
    191
    192        }
    193
    194        /**
    195         * Starting point for the demonstration application.
    196         *
    197         * @param args  ignored.
    198         */
    199        public static void main(String[] args) {
    200            BarChartDemo1 demo = new BarChartDemo1("Bar Chart Demo 1");
    201            demo.pack();
    202            RefineryUtilities.centerFrameOnScreen(demo);
    203            demo.setVisible(true);
    204        }
    205
    206    }