barchart3ddemo2.java

在软件开发中用来绘制各种图表的源码

/* --------------------
 * BarChart3DDemo2.java
 * --------------------
 * (C) Copyright 2002-2004, 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.CategoryLabelPosition;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.CategoryLabelWidthType;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.text.TextBlockAnchor;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleAnchor;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.TextAnchor;
import org.jfree.util.Log;
import org.jfree.util.PrintStreamLogTarget;

/**
 * A simple demonstration application showing how to create a horizontal 3D bar chart using data
 * from a {@link CategoryDataset}.
 */
public class BarChart3DDemo2 extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public BarChart3DDemo2(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(23.0, "Series 1", "London");
        dataset.addValue(14.0, "Series 1", "New York");
        dataset.addValue(14.0, "Series 1", "Istanbul");
        dataset.addValue(14.0, "Series 1", "Cairo");
        dataset.addValue(13.0, "Series 2", "London");
        dataset.addValue(19.0, "Series 2", "New York");
        dataset.addValue(19.0, "Series 2", "Istanbul");
        dataset.addValue(19.0, "Series 2", "Cairo");
        dataset.addValue(7.0, "Series 3", "London");
        dataset.addValue(9.0, "Series 3", "New York");
        dataset.addValue(9.0, "Series 3", "Istanbul");
        dataset.addValue(9.0, "Series 3", "Cairo");
        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 2",       // chart title
            "Category",                  // domain axis label
            "Value",                     // range axis label
            dataset,                     // data
            PlotOrientation.HORIZONTAL,  // orientation
            true,                        // include legend
            true,                        // tooltips
            false                        // urls
        );

        CategoryPlot plot = chart.getCategoryPlot();
        plot.setForegroundAlpha(1.0f);

        // left align the category labels...
        CategoryAxis axis = plot.getDomainAxis();
        CategoryLabelPositions p = axis.getCategoryLabelPositions();
        
        CategoryLabelPosition left = new CategoryLabelPosition(
            RectangleAnchor.LEFT, TextBlockAnchor.CENTER_LEFT, 
            TextAnchor.CENTER_LEFT, 0.0,
            CategoryLabelWidthType.RANGE, 0.30f
        );
        axis.setCategoryLabelPositions(CategoryLabelPositions.replaceLeftPosition(p, left));
        
        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) {

        Log.getInstance().addTarget(new PrintStreamLogTarget());
        BarChart3DDemo2 demo = new BarChart3DDemo2("3D Bar Chart Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}