waterfallchartdemo.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.]
 *
 * -----------------------
 * WaterfallChartDemo.java
 * -----------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: WaterfallChartDemo.java,v 1.14 2004/05/10 16:45:23 mungady Exp $
 *
 * Changes
 * -------
 * 21-Oct-2003 : Version 1 (DG);
 * 06-Nov-2003 : Modified to use ChartFactory (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;
import java.text.DecimalFormat;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.TickUnits;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.StandardCategoryLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.BarRenderer;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.Spacer;

/**
 * A sample waterfall chart.
 */
public class WaterfallChartDemo extends ApplicationFrame {

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

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

    /**
     * Creates a sample dataset for the demo.
     * 
     * @return A sample dataset.
     */
    private CategoryDataset createDataset() {
        final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
        dataset.addValue(15.76, "Product 1", "Labour");
        dataset.addValue(8.66, "Product 1", "Administration");
        dataset.addValue(4.71, "Product 1", "Marketing");
        dataset.addValue(3.51, "Product 1", "Distribution");
        dataset.addValue(32.64, "Product 1", "Total Expense");
        return dataset;
    }
    
    // ****************************************************************************
    // * 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.             *
    // ****************************************************************************
    
    /**
     * Returns the chart.
     * 
     * @param dataset  the dataset.
     *
     * @return The chart.
     */
    private JFreeChart createChart(final CategoryDataset dataset) {
        
        final JFreeChart chart = ChartFactory.createWaterfallChart(
            "Product Cost Breakdown",
            "Expense Category",
            "Cost Per Unit",
            dataset,
            PlotOrientation.VERTICAL,
            true,
            true,
            false
        );
        chart.setBackgroundPaint(Color.white);

        final CategoryPlot plot = chart.getCategoryPlot();
        plot.setBackgroundPaint(Color.lightGray);
        plot.setRangeGridlinePaint(Color.white);
        plot.setRangeGridlinesVisible(true);
        plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
        
        final ValueAxis rangeAxis = plot.getRangeAxis();
        
        // create a custom tick unit collection...
        final DecimalFormat formatter = new DecimalFormat("##,###");
        formatter.setNegativePrefix("(");
        formatter.setNegativeSuffix(")");
        final TickUnits standardUnits = new TickUnits();
        standardUnits.add(new NumberTickUnit(5, formatter));
        standardUnits.add(new NumberTickUnit(10, formatter));
        standardUnits.add(new NumberTickUnit(20, formatter));
        standardUnits.add(new NumberTickUnit(50, formatter));
        standardUnits.add(new NumberTickUnit(100, formatter));
        standardUnits.add(new NumberTickUnit(200, formatter));
        standardUnits.add(new NumberTickUnit(500, formatter));
        standardUnits.add(new NumberTickUnit(1000, formatter));
        standardUnits.add(new NumberTickUnit(2000, formatter));
        standardUnits.add(new NumberTickUnit(5000, formatter));
        rangeAxis.setStandardTickUnits(standardUnits);

        final BarRenderer renderer = (BarRenderer) plot.getRenderer();
        renderer.setDrawBarOutline(false);

        final DecimalFormat labelFormatter = new DecimalFormat("$##,###.00");
        labelFormatter.setNegativePrefix("(");
        labelFormatter.setNegativeSuffix(")");
        renderer.setLabelGenerator(
            new StandardCategoryLabelGenerator("{2}", labelFormatter)
        );
        renderer.setItemLabelsVisible(true);

        return chart;
    }

    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final WaterfallChartDemo demo = new WaterfallChartDemo("Waterfall Chart Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
    
}