fastscatterplotdemo.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.]
 *
 * ------------------------
 * FastScatterPlotDemo.java
 * ------------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: FastScatterPlotDemo.java,v 1.13 2004/04/26 19:11:54 taqua Exp $
 *
 * Changes (from 29-Oct-2002)
 * --------------------------
 * 29-Oct-2002 : Added standard header and Javadocs (DG);
 * 12-Nov-2003 : Enabled zooming (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.RenderingHints;

import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.FastScatterPlot;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A demo of the fast scatter plot.
 *
 */
public class FastScatterPlotDemo extends ApplicationFrame {

    /** A constant for the number of items in the sample dataset. */
    private static final int COUNT = 500000;

    /** The data. */
    private float[][] data = new float[2][COUNT];

    /**
     * Creates a new fast scatter plot demo.
     *
     * @param title  the frame title.
     */
    public FastScatterPlotDemo(final String title) {

        super(title);
        populateData();
        final NumberAxis domainAxis = new NumberAxis("X");
        domainAxis.setAutoRangeIncludesZero(false);
        final NumberAxis rangeAxis = new NumberAxis("Y");
        rangeAxis.setAutoRangeIncludesZero(false);
        final FastScatterPlot plot = new FastScatterPlot(this.data, domainAxis, rangeAxis);
        final JFreeChart chart = new JFreeChart("Fast Scatter Plot", plot);
        chart.setLegend(null);

        // force aliasing of the rendered content..
        chart.getRenderingHints().put
            (RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        final ChartPanel panel = new ChartPanel(chart, true);
        panel.setPreferredSize(new java.awt.Dimension(500, 270));
        panel.setHorizontalZoom(true);
        panel.setVerticalZoom(true);
        panel.setMinimumDrawHeight(10);
        panel.setMaximumDrawHeight(2000);
        panel.setMinimumDrawWidth(20);
        panel.setMaximumDrawWidth(2000);
        
        setContentPane(panel);

    }

    // ****************************************************************************
    // * 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.             *
    // ****************************************************************************
    
    /**
     * Populates the data array with random values.
     */
    private void populateData() {

        for (int i = 0; i < this.data[0].length; i++) {
            final float x = (float) i + 100000;
            this.data[0][i] = x;
            this.data[1][i] = 100000 + (float) Math.random() * COUNT;
        }

    }

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

        final FastScatterPlotDemo demo = new FastScatterPlotDemo("Fast Scatter Plot Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}