fastscatterplot.java

java图形利器

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2007, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
 * USA.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * --------------------
 * FastScatterPlot.java
 * --------------------
 * (C) Copyright 2002-2007, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Arnaud Lelievre;
 *
 * $Id: FastScatterPlot.java,v 1.11.2.5 2007/01/11 11:06:04 mungady Exp $
 *
 * Changes (from 29-Oct-2002)
 * --------------------------
 * 29-Oct-2002 : Added standard header (DG);
 * 07-Nov-2002 : Fixed errors reported by Checkstyle (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 19-Aug-2003 : Implemented Cloneable (DG);
 * 08-Sep-2003 : Added internationalization via use of properties 
 *               resourceBundle (RFE 690236) (AL); 
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 12-Nov-2003 : Implemented zooming (DG);
 * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
 * 26-Jan-2004 : Added domain and range grid lines (DG);
 * 25-Feb-2004 : Replaced CrosshairInfo with CrosshairState (DG);
 * 29-Sep-2004 : Removed hard-coded color (DG);
 * 04-Oct-2004 : Reworked equals() method and renamed ArrayUtils 
 *               --> ArrayUtilities (DG);
 * 12-Nov-2004 : Implemented the new Zoomable interface (DG);
 * 05-May-2005 : Updated draw() method parameters (DG);
 * 16-Jun-2005 : Added get/setData() methods (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 10-Nov-2006 : Fixed bug 1593150, by not allowing null axes, and added
 *               setDomainAxis() and setRangeAxis() methods (DG);
 *
 */

package org.jfree.chart.plot;

import java.awt.AlphaComposite;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Composite;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Iterator;
import java.util.List;
import java.util.ResourceBundle;

import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.axis.AxisState;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.axis.ValueTick;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.data.Range;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ArrayUtilities;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;

/**
 * A fast scatter plot.
 */
public class FastScatterPlot extends Plot implements ValueAxisPlot, 
                                                     Zoomable, 
                                                     Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 7871545897358563521L;
    
    /** The default grid line stroke. */
    public static final Stroke DEFAULT_GRIDLINE_STROKE = new BasicStroke(0.5f,
            BasicStroke.CAP_BUTT,
            BasicStroke.JOIN_BEVEL,
            0.0f,
            new float[] {2.0f, 2.0f},
            0.0f);

    /** The default grid line paint. */
    public static final Paint DEFAULT_GRIDLINE_PAINT = Color.lightGray;

    /** The data. */
    private float[][] data;

    /** The x data range. */
    private Range xDataRange;

    /** The y data range. */
    private Range yDataRange;

    /** The domain axis (used for the x-values). */
    private ValueAxis domainAxis;

    /** The range axis (used for the y-values). */
    private ValueAxis rangeAxis;

    /** The paint used to plot data points. */
    private transient Paint paint;

    /** A flag that controls whether the domain grid-lines are visible. */
    private boolean domainGridlinesVisible;

    /** The stroke used to draw the domain grid-lines. */
    private transient Stroke domainGridlineStroke;

    /** The paint used to draw the domain grid-lines. */
    private transient Paint domainGridlinePaint;

    /** A flag that controls whether the range grid-lines are visible. */
    private boolean rangeGridlinesVisible;

    /** The stroke used to draw the range grid-lines. */
    private transient Stroke rangeGridlineStroke;

    /** The paint used to draw the range grid-lines. */
    private transient Paint rangeGridlinePaint;

    /** The resourceBundle for the localization. */
    protected static ResourceBundle localizationResources = 
        ResourceBundle.getBundle("org.jfree.chart.plot.LocalizationBundle");

    /**
     * Creates a new instance of <code>FastScatterPlot</code> with default 
     * axes.
     */
    public FastScatterPlot() {
        this(null, new NumberAxis("X"), new NumberAxis("Y"));    
    }
    
    /**
     * Creates a new fast scatter plot.
     * <p>
     * The data is an array of x, y values:  data[0][i] = x, data[1][i] = y.
     * 
     * @param data  the data (<code>null</code> permitted).
     * @param domainAxis  the domain (x) axis (<code>null</code> not permitted).
     * @param rangeAxis  the range (y) axis (<code>null</code> not permitted).
     */
    public FastScatterPlot(float[][] data, 
                           ValueAxis domainAxis, ValueAxis rangeAxis) {

        super();
        if (domainAxis == null) {
            throw new IllegalArgumentException("Null 'domainAxis' argument.");
        }
        if (rangeAxis == null) {
            throw new IllegalArgumentException("Null 'rangeAxis' argument.");
        }
        
        this.data = data;
        this.xDataRange = calculateXDataRange(data);
        this.yDataRange = calculateYDataRange(data);
        this.domainAxis = domainAxis;
        this.domainAxis.setPlot(this);
        this.domainAxis.addChangeListener(this);
        this.rangeAxis = rangeAxis;
        this.rangeAxis.setPlot(this);
        this.rangeAxis.addChangeListener(this);

        this.paint = Color.red;
        
        this.domainGridlinesVisible = true;
        this.domainGridlinePaint = FastScatterPlot.DEFAULT_GRIDLINE_PAINT;
        this.domainGridlineStroke = FastScatterPlot.DEFAULT_GRIDLINE_STROKE;

        this.rangeGridlinesVisible = true;
        this.rangeGridlinePaint = FastScatterPlot.DEFAULT_GRIDLINE_PAINT;
        this.rangeGridlineStroke = FastScatterPlot.DEFAULT_GRIDLINE_STROKE;
    
    }

    /**
     * Returns a short string describing the plot type.
     *
     * @return A short string describing the plot type.
     */
    public String getPlotType() {
        return localizationResources.getString("Fast_Scatter_Plot");
    }

    /**
     * Returns the data array used by the plot.
     * 
     * @return The data array (possibly <code>null</code>).
     * 
     * @see #setData(float[][])
     */
    public float[][] getData() {
        return this.data;   
    }
    
    /**
     * Sets the data array used by the plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     * 
     * @param data  the data array (<code>null</code> permitted).
     * 
     * @see #getData()
     */
    public void setData(float[][] data) {
        this.data = data;
        notifyListeners(new PlotChangeEvent(this));
    }
    
    /**
     * Returns the orientation of the plot.
     * 
     * @return The orientation (always {@link PlotOrientation#VERTICAL}).
     */
    public PlotOrientation getOrientation() {
        return PlotOrientation.VERTICAL;    
    }
    
    /**
     * Returns the domain axis for the plot.
     *
     * @return The domain axis (never <code>null</code>).
     * 
     * @see #setDomainAxis(ValueAxis)
     */
    public ValueAxis getDomainAxis() {
        return this.domainAxis;
    }
    
    /**
     * Sets the domain axis and sends a {@link PlotChangeEvent} to all 
     * registered listeners.
     * 
     * @param axis  the axis (<code>null</code> not permitted).
     * 
     * @since 1.0.3
     * 
     * @see #getDomainAxis()
     */
    public void setDomainAxis(ValueAxis axis) {
        if (axis == null) {
            throw new IllegalArgumentException("Null 'axis' argument.");
        }
        this.domainAxis = axis;
        notifyListeners(new PlotChangeEvent(this));
    }

    /**
     * Returns the range axis for the plot.
     *
     * @return The range axis (never <code>null</code>).
     * 
     * @see #setRangeAxis(ValueAxis)
     */
    public ValueAxis getRangeAxis() {
        return this.rangeAxis;
    }

    /**
     * Sets the range axis and sends a {@link PlotChangeEvent} to all 
     * registered listeners.
     * 
     * @param axis  the axis (<code>null</code> not permitted).
     * 
     * @since 1.0.3
     * 
     * @see #getRangeAxis()
     */
    public void setRangeAxis(ValueAxis axis) {
        if (axis == null) {
            throw new IllegalArgumentException("Null 'axis' argument.");
        }
        this.rangeAxis = axis;
        notifyListeners(new PlotChangeEvent(this));
    }

    /**
     * Returns the paint used to plot data points.  The default is 
     * <code>Color.red</code>.
     *
     * @return The paint.
     * 
     * @see #setPaint(Paint)
     */
    public Paint getPaint() {
        return this.paint;
    }

    /**