scatterplotdemo3.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.]
 *
 * ---------------------
 * ScatterPlotDemo3.java
 * ---------------------
 * (C) Copyright 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: ScatterPlotDemo3.java,v 1.12 2004/05/11 14:56:17 mungady Exp $
 *
 * Changes
 * -------
 * 11-May-2004 : Version 1 (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Point;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.Legend;
import org.jfree.chart.StandardLegend;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * A demo scatter plot with some code showing how to convert between Java2D coordinates and
 * (x, y) coordinates.
 */
public class ScatterPlotDemo3 extends ApplicationFrame implements ChartMouseListener {

    /** The panel used to display the chart. */
    private ChartPanel chartPanel;
    
    /**
     * A demonstration application showing a scatter plot.
     *
     * @param title  the frame title.
     */
    public ScatterPlotDemo3(final String title) {
        super(title);
        final XYDataset dataset = new SampleXYDataset2();
        JFreeChart chart = createChart(dataset);
        chartPanel = new ChartPanel(chart);
        chartPanel.addChartMouseListener(this);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        chartPanel.setVerticalAxisTrace(true);
        chartPanel.setHorizontalAxisTrace(true);
        chartPanel.setVerticalZoom(true);
        chartPanel.setHorizontalZoom(true);
        setContentPane(chartPanel);
    }

    /**
     * Creates a sample chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return A dataset.
     */
    private JFreeChart createChart(XYDataset dataset) {
        final JFreeChart chart = ChartFactory.createScatterPlot(
            "Scatter Plot Demo",
            "X", "Y", 
            dataset, 
            PlotOrientation.VERTICAL,
            true, 
            true, 
            false
        );
        final Legend legend = chart.getLegend();
        if (legend instanceof StandardLegend) {
            final StandardLegend sl = (StandardLegend) legend;
            sl.setDisplaySeriesShapes(true);
        }
        final NumberAxis domainAxis = (NumberAxis) chart.getXYPlot().getDomainAxis();
        domainAxis.setAutoRangeIncludesZero(false);
        return chart;
    }
    
    /**
     * Callback method for receiving notification of a mouse click on a chart.
     *
     * @param event  information about the event.
     */
    public void chartMouseClicked(ChartMouseEvent event) {
        int x = event.getTrigger().getX(); 
        int y = event.getTrigger().getY();
        
        // the following translation takes account of the fact that the chart image may 
        // have been scaled up or down to fit the panel...
        Point2D p = chartPanel.translateScreenToJava2D(new Point(x, y));
        
        // now convert the Java2D coordinate to axis coordinates...
        XYPlot plot = chartPanel.getChart().getXYPlot();
        Rectangle2D dataArea = chartPanel.getChartRenderingInfo().getPlotInfo().getDataArea();
        double xx = plot.getDomainAxis().java2DToValue(
            p.getX(), dataArea, plot.getDomainAxisEdge()
        );
        double yy = plot.getRangeAxis().java2DToValue(
            p.getY(), dataArea, plot.getRangeAxisEdge()
        );
        
        // just for fun, lets convert the axis coordinates back to component coordinates...
        double xxx = plot.getDomainAxis().valueToJava2D(xx, dataArea, plot.getDomainAxisEdge());
        double yyy = plot.getRangeAxis().valueToJava2D(yy, dataArea, plot.getRangeAxisEdge());
        
        Point2D p2 = chartPanel.translateJava2DToScreen(new Point2D.Double(xxx, yyy));
        System.out.println("Mouse coordinates are (" + x + ", " + y 
            + "), in data space = (" + xx + ", " + yy + ").");
        System.out.println("--> (" + p2.getX() + ", " + p2.getY() + ")");
    }

    /**
     * Callback method for receiving notification of a mouse movement on a chart.
     *
     * @param event  information about the event.
     */
    public void chartMouseMoved(ChartMouseEvent event) {  
        // ignore
    }
    
    // ****************************************************************************
    // * 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 ScatterPlotDemo3 demo = new ScatterPlotDemo3("Scatter Plot Demo 3");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }

}