barchart3ddemo3.java

在软件开发中用来绘制各种图表的源码

/* --------------------
 * BarChart3DDemo3.java
 * --------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited.
 *
 */

package demo;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.BarRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * This demonstration shows a 3D bar chart with item labels displayed.
 */
public class BarChart3DDemo3 extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public BarChart3DDemo3(String title) {

        super(title);
        
        CategoryDataset dataset = createDataset();
        JFreeChart chart = createChart(dataset);
        ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);

    }

    /**
     * Creates a sample dataset.
     *
     * @return A sample dataset.
     */
   private static CategoryDataset createDataset() {

        DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(25.0, "Series 1", "Category 1");   
        dataset.addValue(34.0, "Series 1", "Category 2");   
        dataset.addValue(19.0, "Series 2", "Category 1");   
        dataset.addValue(29.0, "Series 2", "Category 2");   
        dataset.addValue(41.0, "Series 3", "Category 1");   
        dataset.addValue(33.0, "Series 3", "Category 2");   
        return dataset;

    }
    
    /**
     * Creates a chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return The chart.
     */
    private static JFreeChart createChart(CategoryDataset dataset) {
        
        JFreeChart chart = ChartFactory.createBarChart3D(
            "3D Bar Chart Demo",      // chart title
            "Category",               // domain axis label
            "Value",                  // range axis label
            dataset,                  // data
            PlotOrientation.VERTICAL, // orientation
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );

        CategoryPlot plot = chart.getCategoryPlot();
        CategoryAxis axis = plot.getDomainAxis();
        axis.setCategoryLabelPositions(
            CategoryLabelPositions.createUpRotationLabelPositions(Math.PI / 8.0)
        );
        
        CategoryItemRenderer renderer = plot.getRenderer();
        renderer.setItemLabelsVisible(true);
        BarRenderer r = (BarRenderer) renderer;
        r.setMaximumBarWidth(0.05);
        
        return chart;

    }
    
    /**
     * Creates a panel for the demo (used by SuperDemo.java).
     * 
     * @return A panel.
     */
    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(createDataset());
        return new ChartPanel(chart);
    }
        
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        BarChart3DDemo3 demo = new BarChart3DDemo3("3D Bar Chart Demo 3");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}