waterfallchartdemo2.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.]
 *
 * ------------------------
 * WaterfallChartDemo2.java
 * ------------------------
 * (C) Copyright 2003, 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  Darshan Shah;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: WaterfallChartDemo2.java,v 1.11 2004/05/10 16:45:23 mungady Exp $
 *
 * Changes
 * -------
 * 20-Oct-2003 : Version 1, based on code contributed by Darshan Shah (DG);
 *
 */

package org.jfree.chart.demo;

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

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.TickUnits;
import org.jfree.chart.labels.StandardCategoryLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.ValueMarker;
import org.jfree.chart.renderer.WaterfallBarRenderer;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DefaultCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.Layer;
import org.jfree.ui.RefineryUtilities;

/**
 * A sample waterfall chart.
 */
public class WaterfallChartDemo2 extends ApplicationFrame {

    /**
     * Creates a new WaterFall Chart demo.
     * 
     * @param title  the frame title.
     */
    public WaterfallChartDemo2(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(-890.76, "S1", "PY OM");
        dataset.addValue(-3021.51, "S1", "Vol CM");
        dataset.addValue(-218.32, "S1", "Price");
        dataset.addValue(221.75, "S1", "Mat Inf");
        dataset.addValue(-1504.1, "S1", "Oth Inf");
        dataset.addValue(7103.8, "S1", "VCP");
        dataset.addValue(3503.3, "S1", "CM FX");
        dataset.addValue(-6561.97, "S1", "Base");
        dataset.addValue(-824.25, "S1", "OM");

        return dataset;
        
    }
    
    /**
     * Returns the chart.
     *
     * @param dataset  the dataset.
     * 
     * @return The chart.
     */
    private JFreeChart createChart(final CategoryDataset dataset) {
        
        final CategoryAxis xAxis = new CategoryAxis("Category");
        final NumberAxis yAxis = new NumberAxis("$ in Thousands");
        yAxis.setLowerMargin(0.10);
        yAxis.setUpperMargin(0.10);
        
        // create a custom tick unit collection...
        final DecimalFormat formatter = new DecimalFormat("##,###");
        formatter.setNegativePrefix("(");
        formatter.setNegativeSuffix(")");
        final TickUnits standardUnits = new TickUnits();
        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));

        yAxis.setStandardTickUnits(standardUnits);

        // ****************************************************************************
        // * 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.             *
        // ****************************************************************************
        
        final DecimalFormat labelFormatter = new DecimalFormat("##,###");
        labelFormatter.setNegativePrefix("(");
        labelFormatter.setNegativeSuffix(")");

        final WaterfallBarRenderer renderer = new WaterfallBarRenderer();
        renderer.setLabelGenerator(
            new StandardCategoryLabelGenerator("{2}", labelFormatter)
        );
        renderer.setItemLabelsVisible(Boolean.TRUE);

        final CategoryPlot plot = new CategoryPlot(dataset, xAxis, yAxis, renderer);
        plot.setBackgroundPaint(Color.lightGray);
        plot.setRangeGridlinePaint(Color.white);
        plot.setRangeGridlinesVisible(true);
        final ValueMarker baseline = new ValueMarker(0.0);
        baseline.setPaint(Color.blue);
        baseline.setStroke(new BasicStroke(1.1f));
        plot.addRangeMarker(baseline, Layer.FOREGROUND);

        final JFreeChart chart = new JFreeChart("OM WaterFall Chart",
                                          JFreeChart.DEFAULT_TITLE_FONT, plot, false);
        chart.setBackgroundPaint(Color.white);
        return chart;
    }

    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final WaterfallChartDemo2 demo = new WaterfallChartDemo2("Waterfall Chart Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
}