multiplepiechartdemo2.java

这是一个segy数据显示程序

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------------
 * MultiplePieChartDemo2.java
 * --------------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: MultiplePieChartDemo2.java,v 1.6 2004/04/26 19:12:00 taqua Exp $
 *
 * Changes
 * -------
 * 23-Jan-2003 : Version 1 (DG);
 * 30-Jan-2004 : Renamed MultiPieChartDemo2 --> MultiplePieChartDemo2, and refactored to
 *               use the new MultiplePiePlot class (DG);
 * 
 */

package org.jfree.chart.demo;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.text.NumberFormat;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.labels.StandardPieItemLabelGenerator;
import org.jfree.chart.plot.MultiplePiePlot;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DatasetUtilities;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.TableOrder;

/**
 * This example is similar to {@link MultiplePieChartDemo1}, but slices the dataset by column
 * rather than by row.
 *
 */
public class MultiplePieChartDemo2 extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public MultiplePieChartDemo2(final String title) {

        super(title);
        final CategoryDataset dataset = createDataset();
        final JFreeChart chart = createChart(dataset);
        final ChartPanel chartPanel = new ChartPanel(chart, true, true, true, false, true);
        chartPanel.setPreferredSize(new java.awt.Dimension(600, 380));
        setContentPane(chartPanel);

    }

    // ****************************************************************************
    // * JFREECHART DEVELOPER GUIDE                                               *
    // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
    // * to purchase from Object Refinery Limited:                                *
    // *                                                                          *
    // * http://www.object-refinery.com/jfreechart/guide.html                     *
    // *                                                                          *
    // * Sales are used to provide funding for the JFreeChart project - please    * 
    // * support us so that we can continue developing free software.             *
    // ****************************************************************************
    
    /**
     * Creates a sample dataset.
     * 
     * @return A sample dataset.
     */
    private CategoryDataset createDataset() {
        final double[][] data = new double[][] {
                {3.0, 4.0, 3.0, 5.0},
                {5.0, 7.0, 6.0, 8.0},
                {5.0, 7.0, 3.0, 8.0},
                {1.0, 2.0, 3.0, 4.0},
                {2.0, 3.0, 2.0, 3.0}
        };
        final CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
                "Region ",
                "Sales/Q",
                data
        );
        return dataset;
    }

    /**
     * Creates a sample chart with the given dataset.
     * 
     * @param dataset  the dataset.
     * 
     * @return A sample chart.
     */
    private JFreeChart createChart(final CategoryDataset dataset) {
        final JFreeChart chart = ChartFactory.createMultiplePieChart(
            "Multiple Pie Chart",  // chart title
            dataset,               // dataset
            TableOrder.BY_COLUMN,
            true,                  // include legend
            true,
            false
        );
        final MultiplePiePlot plot = (MultiplePiePlot) chart.getPlot();
        plot.setBackgroundPaint(Color.white);
        plot.setOutlineStroke(new BasicStroke(1.0f));
        final JFreeChart subchart = plot.getPieChart();
        final PiePlot p = (PiePlot) subchart.getPlot();
        p.setBackgroundPaint(null);
        p.setOutlineStroke(null);
        p.setLabelGenerator(new StandardPieItemLabelGenerator(
            "{0} ({2})", NumberFormat.getNumberInstance(), NumberFormat.getPercentInstance()
        ));
        p.setMaximumLabelWidth(0.35);
        p.setLabelFont(new Font("SansSerif", Font.PLAIN, 9));
        p.setInteriorGap(0.30);
        return chart;
    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {

        final MultiplePieChartDemo2 demo = new MultiplePieChartDemo2("Multiple Pie Chart Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}