linechartdemo2.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.]
 *
 * -------------------
 * LineChartDemo2.java
 * -------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: LineChartDemo2.java,v 1.18 2004/04/26 19:11:55 taqua Exp $
 *
 * Changes
 * -------
 * 08-Apr-2002 : Version 1 (DG);
 * 10-Nov-2003 : Added axis offsets and changed colors (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardLegend;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.labels.ItemLabelAnchor;
import org.jfree.chart.labels.ItemLabelPosition;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.StandardXYItemRenderer;
import org.jfree.data.XYDataset;
import org.jfree.data.XYSeries;
import org.jfree.data.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.Spacer;
import org.jfree.ui.TextAnchor;

/**
 * A simple demonstration application showing how to create a line chart using data from an
 * {@link XYDataset}.
 *
 */
public class LineChartDemo2 extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public LineChartDemo2(final String title) {

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

    }
    
    /**
     * Creates a sample dataset.
     * 
     * @return a sample dataset.
     */
    private XYDataset createDataset() {
        
        final XYSeries series1 = new XYSeries("First");
        series1.add(1.0, 1.0);
        series1.add(2.0, 4.0);
        series1.add(3.0, 3.0);
        series1.add(4.0, 5.0);
        series1.add(5.0, 5.0);
        series1.add(6.0, 7.0);
        series1.add(7.0, 7.0);
        series1.add(8.0, 8.0);

        final XYSeries series2 = new XYSeries("Second");
        series2.add(1.0, 5.0);
        series2.add(2.0, 7.0);
        series2.add(3.0, 6.0);
        series2.add(4.0, 8.0);
        series2.add(5.0, 4.0);
        series2.add(6.0, 4.0);
        series2.add(7.0, 2.0);
        series2.add(8.0, 1.0);

        final XYSeries series3 = new XYSeries("Third");
        series3.add(3.0, 4.0);
        series3.add(4.0, 3.0);
        series3.add(5.0, 2.0);
        series3.add(6.0, 3.0);
        series3.add(7.0, 6.0);
        series3.add(8.0, 3.0);
        series3.add(9.0, 4.0);
        series3.add(10.0, 3.0);

        final XYSeriesCollection dataset = new XYSeriesCollection();
        dataset.addSeries(series1);
        dataset.addSeries(series2);
        dataset.addSeries(series3);
                
        return dataset;
        
    }
    
    /**
     * Creates a chart.
     * 
     * @param dataset  the data for the chart.
     * 
     * @return a chart.
     */
    private JFreeChart createChart(final XYDataset dataset) {
        
        // create the chart...
        final JFreeChart chart = ChartFactory.createXYLineChart(
            "Line Chart Demo 2",      // chart title
            "X",                      // x axis label
            "Y",                      // y axis label
            dataset,                  // data
            PlotOrientation.HORIZONTAL,
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );

        // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
        chart.setBackgroundPaint(Color.white);

        final StandardLegend legend = (StandardLegend) chart.getLegend();
        legend.setDisplaySeriesShapes(true);
        
        // get a reference to the plot for further customisation...
        final XYPlot plot = chart.getXYPlot();
        plot.setBackgroundPaint(Color.lightGray);
        plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinePaint(Color.white);
        
        plot.setDomainCrosshairLockedOnData(true);
        plot.setDomainCrosshairVisible(true);
        plot.setRangeCrosshairLockedOnData(true);
        plot.setRangeCrosshairVisible(true);
        
        final StandardXYItemRenderer renderer = (StandardXYItemRenderer) plot.getRenderer();
        renderer.setPlotShapes(true);
        renderer.setShapesFilled(true);
        renderer.setItemLabelsVisible(true);
        final ItemLabelPosition p = new ItemLabelPosition(
            ItemLabelAnchor.OUTSIDE12, TextAnchor.BOTTOM_CENTER, TextAnchor.CENTER, Math.PI / 4
        );
        renderer.setPositiveItemLabelPosition(p);

        // change the auto tick unit selection to integer units only...
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        // OPTIONAL CUSTOMISATION COMPLETED.
                
        return chart;
        
    }

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

        final LineChartDemo2 demo = new LineChartDemo2("Line Chart Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}