cyclicxyplotdemo.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.]
 *
 * ---------------------
 * CyclicXYPlotDemo.java
 * ---------------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  Nicolas Brodu
 * Contributor(s):   -;
 *
 * $Id: CyclicXYPlotDemo.java,v 1.7 2004/04/26 19:11:54 taqua Exp $
 *
 * Changes
 * -------
 * 20-Nov-2003 : Creation Date (NB)
 *
 */

package org.jfree.chart.demo;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.Timer;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CyclicNumberAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.CyclicXYItemRenderer;
import org.jfree.data.XYSeries;
import org.jfree.data.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * Demo for an XY plot, with a cyclic axis and renderer  
 *
 * @author Nicolas Brodu
 */
public class CyclicXYPlotDemo extends ApplicationFrame implements ActionListener {

    /** The series. */
    XYSeries series;
    
    /** The x value. */
    long x = 0;
    
    /** The y value. */
    double y = 50;
    
    /** A timer. */
    Timer timer;
    
    /**
     * A demonstration application showing an XY plot, with a cyclic axis and renderer
     *
     * @param title  the frame title.
     */
    public CyclicXYPlotDemo(final String title) {

        super(title);

        this.series = new XYSeries("Random Data");
        this.series.setMaximumItemCount(50); // Only 50 items are visible at the same time. 
                                             // Keep more as a mean to test this.
        final XYSeriesCollection data = new XYSeriesCollection(this.series);
        
        final JFreeChart chart = ChartFactory.createXYLineChart(
            "Cyclic XY Plot Demo",
            "X", 
            "Y", 
            data,
            PlotOrientation.VERTICAL,
            true,
            true,
            false
        );

        final XYPlot plot = chart.getXYPlot();
        plot.setDomainAxis(new CyclicNumberAxis(10, 0));
        plot.setRenderer(new CyclicXYItemRenderer());

        final NumberAxis axis = (NumberAxis) plot.getRangeAxis();
        axis.setAutoRangeIncludesZero(false);
        axis.setAutoRangeMinimumSize(1.0);

        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(400, 300));
        final JPanel content = new JPanel(new BorderLayout());
        content.add(chartPanel, BorderLayout.CENTER);

        final JButton button1 = new JButton("Start");
        button1.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                timer.start();
            }
        });
        
        final JButton button2 = new JButton("Stop");
        button2.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                timer.stop();
            }
        });

        final JButton button3 = new JButton("Step by step");
        button3.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                CyclicXYPlotDemo.this.actionPerformed(null);
            }
        });

        final JPanel buttonPanel = new JPanel(new FlowLayout());
        buttonPanel.add(button1);
        buttonPanel.add(button2);
        buttonPanel.add(button3);
        
        content.add(buttonPanel, BorderLayout.SOUTH);
        setContentPane(content);

        this.timer = new Timer(200, this);            
    }

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

        final CyclicXYPlotDemo demo = new CyclicXYPlotDemo("Cyclic XY Plot Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

        //.start(); // Calls ourselves each half of a second
    }

    /**
     * Receives notification of an action event.
     * 
     * @param e  the event.
     */
    public void actionPerformed(final ActionEvent e) {
        double delta = Math.random() * 10 - 5;
        if (delta == -5.0) {
            delta = 0; // balance chances
        }
        this.y += delta;
        this.series.add(this.x++ / 4.0, this.y);
    }

}