imagemapdemo5.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.]
 *
 * ------------------
 * ImageMapDemo5.java
 * ------------------
 * (C) Copyright 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ImageMapDemo5.java,v 1.7 2004/04/30 08:09:44 mungady Exp $
 *
 * Changes
 * -------
 * 22-Jan-2004 : Version 1 (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;
import java.awt.Font;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardLegend;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.entity.StandardEntityCollection;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.CategoryDataset;
import org.jfree.data.DatasetUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.Spacer;
import org.jfree.ui.VerticalAlignment;

/**
 * Creates an HTML image map for an area chart.  This demo was put together as a test for
 * bug report 815817.
 *
 */
public class ImageMapDemo5 {

    /**
     * Default constructor.
     */
    public ImageMapDemo5() {
        super();
    }
    
    /**
     * Saves the chart image and HTML.
     */
    public void saveImageAndHTML() {
        
        // create a dataset
        final double[][] data = new double[][] {
                {56.0, -12.0, 34.0, 76.0, 56.0, 100.0, 67.0, 45.0},
                {37.0, 45.0, 67.0, 25.0, 34.0, 34.0, 100.0, 53.0},
                {43.0, 54.0, 34.0, 34.0, 87.0, 64.0, 73.0, 12.0}
        };
        final CategoryDataset dataset = DatasetUtilities.createCategoryDataset(
            "Series ", "Type ", data
        );

        final JFreeChart chart = createChart(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.             *
        // ****************************************************************************
        
        // save it to an image
        try {
            final ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection());
            final File file1 = new File("areachart100.png");
            ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info);

            // write an HTML page incorporating the image with an image map
            final File file2 = new File("areachart100.html");
            final OutputStream out = new BufferedOutputStream(new FileOutputStream(file2));
            final PrintWriter writer = new PrintWriter(out);
            writer.println("<HTML>");
            writer.println("<HEAD><TITLE>JFreeChart Image Map Demo</TITLE></HEAD>");
            writer.println("<BODY>");
            ChartUtilities.writeImageMap(writer, "chart", info);
            writer.println("<IMG SRC=\"areachart100.png\" "
                    + "WIDTH=\"600\" HEIGHT=\"400\" BORDER=\"0\" USEMAP=\"#chart\">");
            writer.println("</BODY>");
            writer.println("</HTML>");
            writer.close();

        }
        catch (IOException e) {
            System.out.println(e.toString());
        }
    }

    /**
     * Creates a chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return The chart.
     */
    private JFreeChart createChart(final CategoryDataset dataset) {
        
        final JFreeChart chart = ChartFactory.createAreaChart(
            "Area Chart",             // chart title
            "Category",               // domain axis label
            "Value",                  // range axis label
            dataset,                  // data
            PlotOrientation.VERTICAL, // orientation
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );
        
        // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

        // set the background color for the chart...
        final StandardLegend legend = (StandardLegend) chart.getLegend();
        legend.setAnchor(StandardLegend.SOUTH);

        chart.setBackgroundPaint(Color.white);
        final TextTitle subtitle = new TextTitle(
            "An area chart demonstration.  We use this subtitle "
            + " as an example of what happens when you get a really long title or subtitle."
        );
        subtitle.setFont(new Font("SansSerif", Font.PLAIN, 12));
        subtitle.setPosition(RectangleEdge.TOP);
        subtitle.setSpacer(new Spacer(Spacer.RELATIVE, 0.05, 0.05, 0.05, 0.05));
        subtitle.setVerticalAlignment(VerticalAlignment.BOTTOM);
        chart.addSubtitle(subtitle);

        final CategoryPlot plot = chart.getCategoryPlot();
        plot.setForegroundAlpha(0.5f);
        
        plot.setAxisOffset(new Spacer(Spacer.ABSOLUTE, 5.0, 5.0, 5.0, 5.0));
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinesVisible(true);
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinesVisible(true);
        plot.setRangeGridlinePaint(Color.white);
        
        final CategoryAxis domainAxis = plot.getDomainAxis();
        domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);
        domainAxis.setLowerMargin(0.0);
        domainAxis.setUpperMargin(0.0);
        
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
        rangeAxis.setLabelAngle(0 * Math.PI / 2.0);
        // OPTIONAL CUSTOMISATION COMPLETED.
        
        return chart;
        
    }

    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final ImageMapDemo5 demo = new ImageMapDemo5();
        demo.saveImageAndHTML();
    }

}