001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, 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 2003-2005, by Object Refinery Limited and Contributors.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   ;
034     *
035     * $Id: BarChartDemo1.java,v 1.1.2.1 2005/10/25 20:41:32 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 09-Mar-2005 : Version 1, copied from the demo collection that ships with
040     *               the JFreeChart Developer Guide (DG);
041     *
042     */
043    
044    package org.jfree.chart.demo;
045    
046    import java.awt.Color;
047    import java.awt.Dimension;
048    import java.awt.GradientPaint;
049    
050    import org.jfree.chart.ChartFactory;
051    import org.jfree.chart.ChartPanel;
052    import org.jfree.chart.JFreeChart;
053    import org.jfree.chart.axis.CategoryAxis;
054    import org.jfree.chart.axis.CategoryLabelPositions;
055    import org.jfree.chart.axis.NumberAxis;
056    import org.jfree.chart.plot.CategoryPlot;
057    import org.jfree.chart.plot.PlotOrientation;
058    import org.jfree.chart.renderer.category.BarRenderer;
059    import org.jfree.data.category.CategoryDataset;
060    import org.jfree.data.category.DefaultCategoryDataset;
061    import org.jfree.ui.ApplicationFrame;
062    import org.jfree.ui.RefineryUtilities;
063    
064    /**
065     * A simple demonstration application showing how to create a bar chart.
066     */
067    public class BarChartDemo1 extends ApplicationFrame {
068    
069        /**
070         * Creates a new demo instance.
071         *
072         * @param title  the frame title.
073         */
074        public BarChartDemo1(String title) {
075    
076            super(title);
077            CategoryDataset dataset = createDataset();
078            JFreeChart chart = createChart(dataset);
079            ChartPanel chartPanel = new ChartPanel(chart, false);
080            chartPanel.setPreferredSize(new Dimension(500, 270));
081            setContentPane(chartPanel);
082    
083        }
084    
085        /**
086         * Returns a sample dataset.
087         * 
088         * @return The dataset.
089         */
090        private static CategoryDataset createDataset() {
091            
092            // row keys...
093            String series1 = "First";
094            String series2 = "Second";
095            String series3 = "Third";
096    
097            // column keys...
098            String category1 = "Category 1";
099            String category2 = "Category 2";
100            String category3 = "Category 3";
101            String category4 = "Category 4";
102            String category5 = "Category 5";
103    
104            // create the dataset...
105            DefaultCategoryDataset dataset = new DefaultCategoryDataset();
106    
107            dataset.addValue(1.0, series1, category1);
108            dataset.addValue(4.0, series1, category2);
109            dataset.addValue(3.0, series1, category3);
110            dataset.addValue(5.0, series1, category4);
111            dataset.addValue(5.0, series1, category5);
112    
113            dataset.addValue(5.0, series2, category1);
114            dataset.addValue(7.0, series2, category2);
115            dataset.addValue(6.0, series2, category3);
116            dataset.addValue(8.0, series2, category4);
117            dataset.addValue(4.0, series2, category5);
118    
119            dataset.addValue(4.0, series3, category1);
120            dataset.addValue(3.0, series3, category2);
121            dataset.addValue(2.0, series3, category3);
122            dataset.addValue(3.0, series3, category4);
123            dataset.addValue(6.0, series3, category5);
124            
125            return dataset;
126            
127        }
128        
129        /**
130         * Creates a sample chart.
131         * 
132         * @param dataset  the dataset.
133         * 
134         * @return The chart.
135         */
136        private static JFreeChart createChart(CategoryDataset dataset) {
137            
138            // create the chart...
139            JFreeChart chart = ChartFactory.createBarChart(
140                "Bar Chart Demo",         // chart title
141                "Category",               // domain axis label
142                "Value",                  // range axis label
143                dataset,                  // data
144                PlotOrientation.VERTICAL, // orientation
145                true,                     // include legend
146                true,                     // tooltips?
147                false                     // URLs?
148            );
149    
150            // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
151    
152            // set the background color for the chart...
153            chart.setBackgroundPaint(Color.white);
154    
155            // get a reference to the plot for further customisation...
156            CategoryPlot plot = chart.getCategoryPlot();
157            plot.setBackgroundPaint(Color.lightGray);
158            plot.setDomainGridlinePaint(Color.white);
159            plot.setDomainGridlinesVisible(true);
160            plot.setRangeGridlinePaint(Color.white);
161    
162            // set the range axis to display integers only...
163            final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
164            rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
165    
166            // disable bar outlines...
167            BarRenderer renderer = (BarRenderer) plot.getRenderer();
168            renderer.setDrawBarOutline(false);
169            
170            // set up gradient paints for series...
171            GradientPaint gp0 = new GradientPaint(
172                0.0f, 0.0f, Color.blue, 
173                0.0f, 0.0f, new Color(0, 0, 64)
174            );
175            GradientPaint gp1 = new GradientPaint(
176                0.0f, 0.0f, Color.green, 
177                0.0f, 0.0f, new Color(0, 64, 0)
178            );
179            GradientPaint gp2 = new GradientPaint(
180                0.0f, 0.0f, Color.red, 
181                0.0f, 0.0f, new Color(64, 0, 0)
182            );
183            renderer.setSeriesPaint(0, gp0);
184            renderer.setSeriesPaint(1, gp1);
185            renderer.setSeriesPaint(2, gp2);
186    
187            CategoryAxis domainAxis = plot.getDomainAxis();
188            domainAxis.setCategoryLabelPositions(
189                CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 6.0)
190            );
191            // OPTIONAL CUSTOMISATION COMPLETED.
192            
193            return chart;
194            
195        }
196        
197        /**
198         * Starting point for the demonstration application.
199         *
200         * @param args  ignored.
201         */
202        public static void main(String[] args) {
203    
204            BarChartDemo1 demo = new BarChartDemo1("Bar Chart Demo");
205            demo.pack();
206            RefineryUtilities.centerFrameOnScreen(demo);
207            demo.setVisible(true);
208    
209        }
210    
211    }