mousezoomdemo.java

JfreeChart 常用图表例子

/* ===========================================================
 * 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.]
 *
 * ------------------
 * MouseZoomDemo.java
 * ------------------
 * (C) Copyright 2002-2004, by Viktor Rajewski and Contributors.
 *
 * Original Author:  Viktor Rajewski;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: MouseZoomDemo.java,v 1.13 2004/06/03 08:52:15 mungady Exp $
 * 
 * Changes
 * -------
 * 12-Aug-2002 : Version 1, based on XYSeriesDemo (VR);
 * 11-Oct-2002 : Renamed XYSeriesMouseZoomDemo --> MouseZoomDemo, altered layout, and fixed errors
 *               reported by Checkstyle (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.BorderLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;

import javax.swing.JCheckBox;
import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.jfree.util.Log;
import org.jfree.util.PrintStreamLogTarget;

/**
 * A simple demo showing mouse zooming.
 *
 * @author Viktor Rajewski
 */
public class MouseZoomDemo extends ApplicationFrame {

    /** The chart panel. */
    private ChartPanel chartPanel;

    /** X zoom. */
    private JCheckBox xzoom;

    /** Y zoom. */
    private JCheckBox yzoom;

    /**
     * A demonstration of mouse zooming.
     *
     * @param title  the frame title.
     */
    public MouseZoomDemo(final String title) {

        super(title);
        final SampleXYDataset data = new SampleXYDataset();
        final JFreeChart chart = ChartFactory.createXYLineChart(
            "Mouse Zoom Demo",
            "X", 
            "Y", 
            data, 
            PlotOrientation.VERTICAL,
            true, 
            true, 
            false
        );

        this.chartPanel = new ChartPanel(chart);
//        this.chartPanel.setHorizontalZoom(false);
  //      this.chartPanel.setVerticalZoom(false);
        this.chartPanel.setHorizontalAxisTrace(false);
        this.chartPanel.setVerticalAxisTrace(false);
        this.chartPanel.setFillZoomRectangle(true);
        this.chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));

        final JPanel main = new JPanel(new BorderLayout());
        final JPanel checkpanel = new JPanel();
        this.xzoom = new JCheckBox("Horizontal Mouse Zooming");
        this.xzoom.setSelected(false);
        this.yzoom = new JCheckBox("Vertical Mouse Zooming");
        this.yzoom.setSelected(false);
        final CheckListener clisten = new CheckListener();
        this.xzoom.addItemListener(clisten);
        this.yzoom.addItemListener(clisten);
        checkpanel.add(this.xzoom);
        checkpanel.add(this.yzoom);
        main.add(checkpanel, BorderLayout.SOUTH);
        main.add(this.chartPanel);
        setContentPane(main);

    }

    // ****************************************************************************
    // * 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) {

        Log.getInstance().addTarget(new PrintStreamLogTarget(System.out));
        final MouseZoomDemo demo = new MouseZoomDemo("Mouse Zoom Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

    /**
     * An item listener.
     *
     * @author VR
     */
    class CheckListener implements ItemListener {

        /**
         * Receives change events.
         *
         * @param e  the event.
         */
        public void itemStateChanged(final ItemEvent e) {
            final Object source = e.getItemSelectable();
            if (source == xzoom) {
                if (e.getStateChange() == ItemEvent.DESELECTED) {
//                    chartPanel.setHorizontalZoom(false);
                    chartPanel.setHorizontalAxisTrace(false);
                    chartPanel.repaint();
                }
                else {
  //                  chartPanel.setHorizontalZoom(true);
                    chartPanel.setHorizontalAxisTrace(true);
                }
            }
            else if (source == yzoom) {
                if (e.getStateChange() == ItemEvent.DESELECTED) {
    //                chartPanel.setVerticalZoom(false);
                    chartPanel.setVerticalAxisTrace(false);
                    chartPanel.repaint();
                }
                else {
      //              chartPanel.setVerticalZoom(true);
                    chartPanel.setVerticalAxisTrace(true);
                }
            }
       }
    }

}