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jfreechart example source code file (CategoryPlot.java)

This example jfreechart source code file (CategoryPlot.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

awt, categoryaxis, categoryitemrenderer, collection, geometry, illegalargumentexception, illegalargumentexception, integer, integer, io, list, list, null, paint, stroke, util, valueaxis, valueaxis

The jfreechart CategoryPlot.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2009, 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.]
 *
 * -----------------
 * CategoryPlot.java
 * -----------------
 * (C) Copyright 2000-2009, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   Jeremy Bowman;
 *                   Arnaud Lelievre;
 *                   Richard West, Advanced Micro Devices, Inc.;
 *                   Ulrich Voigt - patch 2686040;
 *                   Peter Kolb - patch 2603321;
 *
 * Changes
 * -------
 * 21-Jun-2001 : Removed redundant JFreeChart parameter from constructors (DG);
 * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
 * 18-Sep-2001 : Updated header (DG);
 * 15-Oct-2001 : Data source classes moved to com.jrefinery.data.* (DG);
 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
 * 23-Oct-2001 : Changed intro and trail gaps on bar plots to use percentage of
 *               available space rather than a fixed number of units (DG);
 * 12-Dec-2001 : Changed constructors to protected (DG);
 * 13-Dec-2001 : Added tooltips (DG);
 * 16-Jan-2002 : Increased maximum intro and trail gap percents, plus added
 *               some argument checking code.  Thanks to Taoufik Romdhane for
 *               suggesting this (DG);
 * 05-Feb-2002 : Added accessor methods for the tooltip generator, incorporated
 *               alpha-transparency for Plot and subclasses (DG);
 * 06-Mar-2002 : Updated import statements (DG);
 * 14-Mar-2002 : Renamed BarPlot.java --> CategoryPlot.java, and changed code
 *               to use the CategoryItemRenderer interface (DG);
 * 22-Mar-2002 : Dropped the getCategories() method (DG);
 * 23-Apr-2002 : Moved the dataset from the JFreeChart class to the Plot
 *               class (DG);
 * 29-Apr-2002 : New methods to support printing values at the end of bars,
 *               contributed by Jeremy Bowman (DG);
 * 11-May-2002 : New methods for label visibility and overlaid plot support,
 *               contributed by Jeremy Bowman (DG);
 * 06-Jun-2002 : Removed the tooltip generator, this is now stored with the
 *               renderer.  Moved constants into the CategoryPlotConstants
 *               interface.  Updated Javadoc comments (DG);
 * 10-Jun-2002 : Overridden datasetChanged() method to update the upper and
 *               lower bound on the range axis (if necessary), updated
 *               Javadocs (DG);
 * 25-Jun-2002 : Removed redundant imports (DG);
 * 20-Aug-2002 : Changed the constructor for Marker (DG);
 * 28-Aug-2002 : Added listener notification to setDomainAxis() and
 *               setRangeAxis() (DG);
 * 23-Sep-2002 : Added getLegendItems() method and fixed errors reported by
 *               Checkstyle (DG);
 * 28-Oct-2002 : Changes to the CategoryDataset interface (DG);
 * 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);
 * 07-Nov-2002 : Renamed labelXXX as valueLabelXXX (DG);
 * 18-Nov-2002 : Added grid settings for both domain and range axis (previously
 *               these were set in the axes) (DG);
 * 19-Nov-2002 : Added axis location parameters to constructor (DG);
 * 17-Jan-2003 : Moved to com.jrefinery.chart.plot package (DG);
 * 14-Feb-2003 : Fixed bug in auto-range calculation for secondary axis (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 02-May-2003 : Moved render() method up from subclasses. Added secondary
 *               range markers. Added an attribute to control the dataset
 *               rendering order.  Added a drawAnnotations() method.  Changed
 *               the axis location from an int to an AxisLocation (DG);
 * 07-May-2003 : Merged HorizontalCategoryPlot and VerticalCategoryPlot into
 *               this class (DG);
 * 02-Jun-2003 : Removed check for range axis compatibility (DG);
 * 04-Jul-2003 : Added a domain gridline position attribute (DG);
 * 21-Jul-2003 : Moved DrawingSupplier to Plot superclass (DG);
 * 19-Aug-2003 : Added equals() method and implemented Cloneable (DG);
 * 01-Sep-2003 : Fixed bug 797466 (no change event when secondary dataset
 *               changes) (DG);
 * 02-Sep-2003 : Fixed bug 795209 (wrong dataset checked in render2 method) and
 *               790407 (initialise method) (DG);
 * 08-Sep-2003 : Added internationalization via use of properties
 *               resourceBundle (RFE 690236) (AL);
 * 08-Sep-2003 : Fixed bug (wrong secondary range axis being used).  Changed
 *               ValueAxis API (DG);
 * 10-Sep-2003 : Fixed bug in setRangeAxis() method (DG);
 * 15-Sep-2003 : Fixed two bugs in serialization, implemented
 *               PublicCloneable (DG);
 * 23-Oct-2003 : Added event notification for changes to renderer (DG);
 * 26-Nov-2003 : Fixed bug (849645) in clearRangeMarkers() method (DG);
 * 03-Dec-2003 : Modified draw method to accept anchor (DG);
 * 21-Jan-2004 : Update for renamed method in ValueAxis (DG);
 * 10-Mar-2004 : Fixed bug in axis range calculation when secondary renderer is
 *               stacked (DG);
 * 12-May-2004 : Added fixed legend items (DG);
 * 19-May-2004 : Added check for null legend item from renderer (DG);
 * 02-Jun-2004 : Updated the DatasetRenderingOrder class (DG);
 * 05-Nov-2004 : Renamed getDatasetsMappedToRangeAxis()
 *               --> datasetsMappedToRangeAxis(), and ensured that returned
 *               list doesn't contain null datasets (DG);
 * 12-Nov-2004 : Implemented new Zoomable interface (DG);
 * 07-Jan-2005 : Renamed getRangeExtent() --> findRangeBounds() in
 *               CategoryItemRenderer (DG);
 * 04-May-2005 : Fixed serialization of range markers (DG);
 * 05-May-2005 : Updated draw() method parameters (DG);
 * 20-May-2005 : Added setDomainAxes() and setRangeAxes() methods, as per
 *               RFE 1183100 (DG);
 * 01-Jun-2005 : Upon deserialization, register plot as a listener with its
 *               axes, dataset(s) and renderer(s) - see patch 1209475 (DG);
 * 02-Jun-2005 : Added support for domain markers (DG);
 * 06-Jun-2005 : Fixed equals() method for use with GradientPaint (DG);
 * 09-Jun-2005 : Added setRenderers(), as per RFE 1183100 (DG);
 * 16-Jun-2005 : Added getDomainAxisCount() and getRangeAxisCount() methods, to
 *               match XYPlot (see RFE 1220495) (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 11-Jan-2006 : Added configureRangeAxes() to rendererChanged(), since the
 *               renderer might influence the axis range (DG);
 * 27-Jan-2006 : Added various null argument checks (DG);
 * 18-Aug-2006 : Added getDatasetCount() method, plus a fix for bug drawing
 *               category labels, thanks to Adriaan Joubert (1277726) (DG);
 * 05-Sep-2006 : Added MarkerChangeEvent support (DG);
 * 30-Oct-2006 : Added getDomainAxisIndex(), datasetsMappedToDomainAxis() and
 *               getCategoriesForAxis() methods (DG);
 * 22-Nov-2006 : Fire PlotChangeEvent from setColumnRenderingOrder() and
 *               setRowRenderingOrder() (DG);
 * 29-Nov-2006 : Fix for bug 1605207 (IntervalMarker exceeds bounds of data
 *               area) (DG);
 * 26-Feb-2007 : Fix for bug 1669218 (setDomainAxisLocation() notify argument
 *               ignored) (DG);
 * 13-Mar-2007 : Added null argument checks for setRangeCrosshairPaint() and
 *               setRangeCrosshairStroke(), fixed clipping for
 *               annotations (DG);
 * 07-Jun-2007 : Override drawBackground() for new GradientPaint handling (DG);
 * 10-Jul-2007 : Added getRangeAxisIndex(ValueAxis) method (DG);
 * 24-Sep-2007 : Implemented new zoom methods (DG);
 * 25-Oct-2007 : Added some argument checks (DG);
 * 05-Nov-2007 : Applied patch 1823697, by Richard West, for removal of domain
 *               and range markers (DG);
 * 14-Nov-2007 : Added missing event notifications (DG);
 * 25-Mar-2008 : Added new methods with optional notification - see patch
 *               1913751 (DG);
 * 07-Apr-2008 : Fixed NPE in removeDomainMarker() and
 *               removeRangeMarker() (DG);
 * 23-Apr-2008 : Fixed equals() and clone() methods (DG);
 * 26-Jun-2008 : Fixed crosshair support (DG);
 * 10-Jul-2008 : Fixed outline visibility for 3D renderers (DG);
 * 12-Aug-2008 : Added rendererCount() method (DG);
 * 25-Nov-2008 : Added facility to map datasets to multiples axes (DG);
 * 15-Dec-2008 : Cleaned up grid drawing methods (DG);
 * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
 *               Jess Thrysoee (DG);
 * 21-Jan-2009 : Added rangeMinorGridlinesVisible flag (DG);
 * 18-Mar-2009 : Modified anchored zoom behaviour (DG);
 * 19-Mar-2009 : Implemented Pannable interface - see patch 2686040 (DG);
 * 19-Mar-2009 : Added entity support - see patch 2603321 by Peter Kolb (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.Font;
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.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.TreeMap;

import org.jfree.chart.LegendItem;
import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.annotations.CategoryAnnotation;
import org.jfree.chart.axis.Axis;
import org.jfree.chart.axis.AxisCollection;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.AxisSpace;
import org.jfree.chart.axis.AxisState;
import org.jfree.chart.axis.CategoryAnchor;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.TickType;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.axis.ValueTick;
import org.jfree.chart.event.ChartChangeEventType;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.event.RendererChangeListener;
import org.jfree.chart.renderer.category.AbstractCategoryItemRenderer;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.chart.util.ResourceBundleWrapper;
import org.jfree.data.Range;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.general.Dataset;
import org.jfree.data.general.DatasetChangeEvent;
import org.jfree.data.general.DatasetUtilities;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.Layer;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectList;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;
import org.jfree.util.SortOrder;

/**
 * A general plotting class that uses data from a {@link CategoryDataset} and
 * renders each data item using a {@link CategoryItemRenderer}.
 */
public class CategoryPlot extends Plot implements ValueAxisPlot, Pannable,
        Zoomable, RendererChangeListener, Cloneable, PublicCloneable,
        Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -3537691700434728188L;

    /**
     * The default visibility of the grid lines plotted against the domain
     * axis.
     */
    public static final boolean DEFAULT_DOMAIN_GRIDLINES_VISIBLE = false;

    /**
     * The default visibility of the grid lines plotted against the range
     * axis.
     */
    public static final boolean DEFAULT_RANGE_GRIDLINES_VISIBLE = true;

    /** 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 default value label font. */
    public static final Font DEFAULT_VALUE_LABEL_FONT = new Font("SansSerif",
            Font.PLAIN, 10);

    /**
     * The default crosshair visibility.
     *
     * @since 1.0.5
     */
    public static final boolean DEFAULT_CROSSHAIR_VISIBLE = false;

    /**
     * The default crosshair stroke.
     *
     * @since 1.0.5
     */
    public static final Stroke DEFAULT_CROSSHAIR_STROKE
            = DEFAULT_GRIDLINE_STROKE;

    /**
     * The default crosshair paint.
     *
     * @since 1.0.5
     */
    public static final Paint DEFAULT_CROSSHAIR_PAINT = Color.blue;

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

    /** The plot orientation. */
    private PlotOrientation orientation;

    /** The offset between the data area and the axes. */
    private RectangleInsets axisOffset;

    /** Storage for the domain axes. */
    private ObjectList domainAxes;

    /** Storage for the domain axis locations. */
    private ObjectList domainAxisLocations;

    /**
     * A flag that controls whether or not the shared domain axis is drawn
     * (only relevant when the plot is being used as a subplot).
     */
    private boolean drawSharedDomainAxis;

    /** Storage for the range axes. */
    private ObjectList rangeAxes;

    /** Storage for the range axis locations. */
    private ObjectList rangeAxisLocations;

    /** Storage for the datasets. */
    private ObjectList datasets;

    /** Storage for keys that map datasets to domain axes. */
    private TreeMap datasetToDomainAxesMap;

    /** Storage for keys that map datasets to range axes. */
    private TreeMap datasetToRangeAxesMap;

    /** Storage for the renderers. */
    private ObjectList renderers;

    /** The dataset rendering order. */
    private DatasetRenderingOrder renderingOrder
            = DatasetRenderingOrder.REVERSE;

    /**
     * Controls the order in which the columns are traversed when rendering the
     * data items.
     */
    private SortOrder columnRenderingOrder = SortOrder.ASCENDING;

    /**
     * Controls the order in which the rows are traversed when rendering the
     * data items.
     */
    private SortOrder rowRenderingOrder = SortOrder.ASCENDING;

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

    /** The position of the domain gridlines relative to the category. */
    private CategoryAnchor domainGridlinePosition;

    /** 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 or not the zero baseline against the range
     * axis is visible.
     *
     * @since 1.0.13
     */
    private boolean rangeZeroBaselineVisible;

    /**
     * The stroke used for the zero baseline against the range axis.
     *
     * @since 1.0.13
     */
    private transient Stroke rangeZeroBaselineStroke;

    /**
     * The paint used for the zero baseline against the range axis.
     *
     * @since 1.0.13
     */
    private transient Paint rangeZeroBaselinePaint;

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

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

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

    /**
     * A flag that controls whether or not gridlines are shown for the minor
     * tick values on the primary range axis.
     *
     * @since 1.0.13
     */
    private boolean rangeMinorGridlinesVisible;

    /**
     * The stroke used to draw the range minor grid-lines.
     *
     * @since 1.0.13
     */
    private transient Stroke rangeMinorGridlineStroke;

    /**
     * The paint used to draw the range minor grid-lines.
     *
     * @since 1.0.13
     */
    private transient Paint rangeMinorGridlinePaint;

    /** The anchor value. */
    private double anchorValue;

    /**
     * The index for the dataset that the crosshairs are linked to (this
     * determines which axes the crosshairs are plotted against).
     *
     * @since 1.0.11
     */
    private int crosshairDatasetIndex;

    /**
     * A flag that controls the visibility of the domain crosshair.
     *
     * @since 1.0.11
     */
    private boolean domainCrosshairVisible;

    /**
     * The row key for the crosshair point.
     *
     * @since 1.0.11
     */
    private Comparable domainCrosshairRowKey;

    /**
     * The column key for the crosshair point.
     *
     * @since 1.0.11
     */
    private Comparable domainCrosshairColumnKey;

    /**
     * The stroke used to draw the domain crosshair if it is visible.
     *
     * @since 1.0.11
     */
    private transient Stroke domainCrosshairStroke;

    /**
     * The paint used to draw the domain crosshair if it is visible.
     *
     * @since 1.0.11
     */
    private transient Paint domainCrosshairPaint;

    /** A flag that controls whether or not a range crosshair is drawn. */
    private boolean rangeCrosshairVisible;

    /** The range crosshair value. */
    private double rangeCrosshairValue;

    /** The pen/brush used to draw the crosshair (if any). */
    private transient Stroke rangeCrosshairStroke;

    /** The color used to draw the crosshair (if any). */
    private transient Paint rangeCrosshairPaint;

    /**
     * A flag that controls whether or not the crosshair locks onto actual
     * data points.
     */
    private boolean rangeCrosshairLockedOnData = true;

    /** A map containing lists of markers for the domain axes. */
    private Map foregroundDomainMarkers;

    /** A map containing lists of markers for the domain axes. */
    private Map backgroundDomainMarkers;

    /** A map containing lists of markers for the range axes. */
    private Map foregroundRangeMarkers;

    /** A map containing lists of markers for the range axes. */
    private Map backgroundRangeMarkers;

    /**
     * A (possibly empty) list of annotations for the plot.  The list should
     * be initialised in the constructor and never allowed to be
     * <code>null.
     */
    private List annotations;

    /**
     * The weight for the plot (only relevant when the plot is used as a subplot
     * within a combined plot).
     */
    private int weight;

    /** The fixed space for the domain axis. */
    private AxisSpace fixedDomainAxisSpace;

    /** The fixed space for the range axis. */
    private AxisSpace fixedRangeAxisSpace;

    /**
     * An optional collection of legend items that can be returned by the
     * getLegendItems() method.
     */
    private LegendItemCollection fixedLegendItems;

    /**
     * A flag that controls whether or not panning is enabled for the 
     * range axis/axes.
     *
     * @since 1.0.13
     */
    private boolean rangePannable;

    /**
     * Default constructor.
     */
    public CategoryPlot() {
        this(null, null, null, null);
    }

    /**
     * Creates a new plot.
     *
     * @param dataset  the dataset (<code>null permitted).
     * @param domainAxis  the domain axis (<code>null permitted).
     * @param rangeAxis  the range axis (<code>null permitted).
     * @param renderer  the item renderer (<code>null permitted).
     *
     */
    public CategoryPlot(CategoryDataset dataset,
                        CategoryAxis domainAxis,
                        ValueAxis rangeAxis,
                        CategoryItemRenderer renderer) {

        super();

        this.orientation = PlotOrientation.VERTICAL;

        // allocate storage for dataset, axes and renderers
        this.domainAxes = new ObjectList();
        this.domainAxisLocations = new ObjectList();
        this.rangeAxes = new ObjectList();
        this.rangeAxisLocations = new ObjectList();

        this.datasetToDomainAxesMap = new TreeMap();
        this.datasetToRangeAxesMap = new TreeMap();

        this.renderers = new ObjectList();

        this.datasets = new ObjectList();
        this.datasets.set(0, dataset);
        if (dataset != null) {
            dataset.addChangeListener(this);
        }

        this.axisOffset = RectangleInsets.ZERO_INSETS;

        setDomainAxisLocation(AxisLocation.BOTTOM_OR_LEFT, false);
        setRangeAxisLocation(AxisLocation.TOP_OR_LEFT, false);

        this.renderers.set(0, renderer);
        if (renderer != null) {
            renderer.setPlot(this);
            renderer.addChangeListener(this);
        }

        this.domainAxes.set(0, domainAxis);
        this.mapDatasetToDomainAxis(0, 0);
        if (domainAxis != null) {
            domainAxis.setPlot(this);
            domainAxis.addChangeListener(this);
        }
        this.drawSharedDomainAxis = false;

        this.rangeAxes.set(0, rangeAxis);
        this.mapDatasetToRangeAxis(0, 0);
        if (rangeAxis != null) {
            rangeAxis.setPlot(this);
            rangeAxis.addChangeListener(this);
        }

        configureDomainAxes();
        configureRangeAxes();

        this.domainGridlinesVisible = DEFAULT_DOMAIN_GRIDLINES_VISIBLE;
        this.domainGridlinePosition = CategoryAnchor.MIDDLE;
        this.domainGridlineStroke = DEFAULT_GRIDLINE_STROKE;
        this.domainGridlinePaint = DEFAULT_GRIDLINE_PAINT;

        this.rangeZeroBaselineVisible = false;
        this.rangeZeroBaselinePaint = Color.black;
        this.rangeZeroBaselineStroke = new BasicStroke(0.5f);

        this.rangeGridlinesVisible = DEFAULT_RANGE_GRIDLINES_VISIBLE;
        this.rangeGridlineStroke = DEFAULT_GRIDLINE_STROKE;
        this.rangeGridlinePaint = DEFAULT_GRIDLINE_PAINT;

        this.rangeMinorGridlinesVisible = false;
        this.rangeMinorGridlineStroke = DEFAULT_GRIDLINE_STROKE;
        this.rangeMinorGridlinePaint = Color.white;

        this.foregroundDomainMarkers = new HashMap();
        this.backgroundDomainMarkers = new HashMap();
        this.foregroundRangeMarkers = new HashMap();
        this.backgroundRangeMarkers = new HashMap();

        this.anchorValue = 0.0;

        this.domainCrosshairVisible = false;
        this.domainCrosshairStroke = DEFAULT_CROSSHAIR_STROKE;
        this.domainCrosshairPaint = DEFAULT_CROSSHAIR_PAINT;

        this.rangeCrosshairVisible = DEFAULT_CROSSHAIR_VISIBLE;
        this.rangeCrosshairValue = 0.0;
        this.rangeCrosshairStroke = DEFAULT_CROSSHAIR_STROKE;
        this.rangeCrosshairPaint = DEFAULT_CROSSHAIR_PAINT;

        this.annotations = new java.util.ArrayList();
        
        this.rangePannable = false;
    }

    /**
     * Returns a string describing the type of plot.
     *
     * @return The type.
     */
    public String getPlotType() {
        return localizationResources.getString("Category_Plot");
    }

    /**
     * Returns the orientation of the plot.
     *
     * @return The orientation of the plot (never <code>null).
     *
     * @see #setOrientation(PlotOrientation)
     */
    public PlotOrientation getOrientation() {
        return this.orientation;
    }

    /**
     * Sets the orientation for the plot and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param orientation  the orientation (<code>null not permitted).
     *
     * @see #getOrientation()
     */
    public void setOrientation(PlotOrientation orientation) {
        if (orientation == null) {
            throw new IllegalArgumentException("Null 'orientation' argument.");
        }
        this.orientation = orientation;
        fireChangeEvent();
    }

    /**
     * Returns the axis offset.
     *
     * @return The axis offset (never <code>null).
     *
     * @see #setAxisOffset(RectangleInsets)
     */
    public RectangleInsets getAxisOffset() {
        return this.axisOffset;
    }

    /**
     * Sets the axis offsets (gap between the data area and the axes) and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param offset  the offset (<code>null not permitted).
     *
     * @see #getAxisOffset()
     */
    public void setAxisOffset(RectangleInsets offset) {
        if (offset == null) {
            throw new IllegalArgumentException("Null 'offset' argument.");
        }
        this.axisOffset = offset;
        fireChangeEvent();
    }

    /**
     * Returns the domain axis for the plot.  If the domain axis for this plot
     * is <code>null, then the method will return the parent plot's
     * domain axis (if there is a parent plot).
     *
     * @return The domain axis (<code>null permitted).
     *
     * @see #setDomainAxis(CategoryAxis)
     */
    public CategoryAxis getDomainAxis() {
        return getDomainAxis(0);
    }

    /**
     * Returns a domain axis.
     *
     * @param index  the axis index.
     *
     * @return The axis (<code>null possible).
     *
     * @see #setDomainAxis(int, CategoryAxis)
     */
    public CategoryAxis getDomainAxis(int index) {
        CategoryAxis result = null;
        if (index < this.domainAxes.size()) {
            result = (CategoryAxis) this.domainAxes.get(index);
        }
        if (result == null) {
            Plot parent = getParent();
            if (parent instanceof CategoryPlot) {
                CategoryPlot cp = (CategoryPlot) parent;
                result = cp.getDomainAxis(index);
            }
        }
        return result;
    }

    /**
     * Sets the domain axis for the plot and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param axis  the axis (<code>null permitted).
     *
     * @see #getDomainAxis()
     */
    public void setDomainAxis(CategoryAxis axis) {
        setDomainAxis(0, axis);
    }

    /**
     * Sets a domain axis and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param index  the axis index.
     * @param axis  the axis (<code>null permitted).
     *
     * @see #getDomainAxis(int)
     */
    public void setDomainAxis(int index, CategoryAxis axis) {
        setDomainAxis(index, axis, true);
    }

    /**
     * Sets a domain axis and, if requested, sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param index  the axis index.
     * @param axis  the axis (<code>null permitted).
     * @param notify  notify listeners?
     */
    public void setDomainAxis(int index, CategoryAxis axis, boolean notify) {
        CategoryAxis existing = (CategoryAxis) this.domainAxes.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }
        if (axis != null) {
            axis.setPlot(this);
        }
        this.domainAxes.set(index, axis);
        if (axis != null) {
            axis.configure();
            axis.addChangeListener(this);
        }
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Sets the domain axes for this plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param axes  the axes (<code>null not permitted).
     *
     * @see #setRangeAxes(ValueAxis[])
     */
    public void setDomainAxes(CategoryAxis[] axes) {
        for (int i = 0; i < axes.length; i++) {
            setDomainAxis(i, axes[i], false);
        }
        fireChangeEvent();
    }

    /**
     * Returns the index of the specified axis, or <code>-1 if the axis
     * is not assigned to the plot.
     *
     * @param axis  the axis (<code>null not permitted).
     *
     * @return The axis index.
     *
     * @see #getDomainAxis(int)
     * @see #getRangeAxisIndex(ValueAxis)
     *
     * @since 1.0.3
     */
    public int getDomainAxisIndex(CategoryAxis axis) {
        if (axis == null) {
            throw new IllegalArgumentException("Null 'axis' argument.");
        }
        return this.domainAxes.indexOf(axis);
    }

    /**
     * Returns the domain axis location for the primary domain axis.
     *
     * @return The location (never <code>null).
     *
     * @see #getRangeAxisLocation()
     */
    public AxisLocation getDomainAxisLocation() {
        return getDomainAxisLocation(0);
    }

    /**
     * Returns the location for a domain axis.
     *
     * @param index  the axis index.
     *
     * @return The location.
     *
     * @see #setDomainAxisLocation(int, AxisLocation)
     */
    public AxisLocation getDomainAxisLocation(int index) {
        AxisLocation result = null;
        if (index < this.domainAxisLocations.size()) {
            result = (AxisLocation) this.domainAxisLocations.get(index);
        }
        if (result == null) {
            result = AxisLocation.getOpposite(getDomainAxisLocation(0));
        }
        return result;
    }

    /**
     * Sets the location of the domain axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param location  the axis location (<code>null not permitted).
     *
     * @see #getDomainAxisLocation()
     * @see #setDomainAxisLocation(int, AxisLocation)
     */
    public void setDomainAxisLocation(AxisLocation location) {
        // delegate...
        setDomainAxisLocation(0, location, true);
    }

    /**
     * Sets the location of the domain axis and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param location  the axis location (<code>null not permitted).
     * @param notify  a flag that controls whether listeners are notified.
     */
    public void setDomainAxisLocation(AxisLocation location, boolean notify) {
        // delegate...
        setDomainAxisLocation(0, location, notify);
    }

    /**
     * Sets the location for a domain axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param index  the axis index.
     * @param location  the location.
     *
     * @see #getDomainAxisLocation(int)
     * @see #setRangeAxisLocation(int, AxisLocation)
     */
    public void setDomainAxisLocation(int index, AxisLocation location) {
        // delegate...
        setDomainAxisLocation(index, location, true);
    }

    /**
     * Sets the location for a domain axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param index  the axis index.
     * @param location  the location.
     * @param notify  notify listeners?
     *
     * @since 1.0.5
     *
     * @see #getDomainAxisLocation(int)
     * @see #setRangeAxisLocation(int, AxisLocation, boolean)
     */
    public void setDomainAxisLocation(int index, AxisLocation location,
            boolean notify) {
        if (index == 0 && location == null) {
            throw new IllegalArgumentException(
                    "Null 'location' for index 0 not permitted.");
        }
        this.domainAxisLocations.set(index, location);
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the domain axis edge.  This is derived from the axis location
     * and the plot orientation.
     *
     * @return The edge (never <code>null).
     */
    public RectangleEdge getDomainAxisEdge() {
        return getDomainAxisEdge(0);
    }

    /**
     * Returns the edge for a domain axis.
     *
     * @param index  the axis index.
     *
     * @return The edge (never <code>null).
     */
    public RectangleEdge getDomainAxisEdge(int index) {
        RectangleEdge result = null;
        AxisLocation location = getDomainAxisLocation(index);
        if (location != null) {
            result = Plot.resolveDomainAxisLocation(location, this.orientation);
        }
        else {
            result = RectangleEdge.opposite(getDomainAxisEdge(0));
        }
        return result;
    }

    /**
     * Returns the number of domain axes.
     *
     * @return The axis count.
     */
    public int getDomainAxisCount() {
        return this.domainAxes.size();
    }

    /**
     * Clears the domain axes from the plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     */
    public void clearDomainAxes() {
        for (int i = 0; i < this.domainAxes.size(); i++) {
            CategoryAxis axis = (CategoryAxis) this.domainAxes.get(i);
            if (axis != null) {
                axis.removeChangeListener(this);
            }
        }
        this.domainAxes.clear();
        fireChangeEvent();
    }

    /**
     * Configures the domain axes.
     */
    public void configureDomainAxes() {
        for (int i = 0; i < this.domainAxes.size(); i++) {
            CategoryAxis axis = (CategoryAxis) this.domainAxes.get(i);
            if (axis != null) {
                axis.configure();
            }
        }
    }

    /**
     * Returns the range axis for the plot.  If the range axis for this plot is
     * null, then the method will return the parent plot's range axis (if there
     * is a parent plot).
     *
     * @return The range axis (possibly <code>null).
     */
    public ValueAxis getRangeAxis() {
        return getRangeAxis(0);
    }

    /**
     * Returns a range axis.
     *
     * @param index  the axis index.
     *
     * @return The axis (<code>null possible).
     */
    public ValueAxis getRangeAxis(int index) {
        ValueAxis result = null;
        if (index < this.rangeAxes.size()) {
            result = (ValueAxis) this.rangeAxes.get(index);
        }
        if (result == null) {
            Plot parent = getParent();
            if (parent instanceof CategoryPlot) {
                CategoryPlot cp = (CategoryPlot) parent;
                result = cp.getRangeAxis(index);
            }
        }
        return result;
    }

    /**
     * Sets the range axis for the plot and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param axis  the axis (<code>null permitted).
     */
    public void setRangeAxis(ValueAxis axis) {
        setRangeAxis(0, axis);
    }

    /**
     * Sets a range axis and sends a {@link PlotChangeEvent} to all registered
     * listeners.
     *
     * @param index  the axis index.
     * @param axis  the axis.
     */
    public void setRangeAxis(int index, ValueAxis axis) {
        setRangeAxis(index, axis, true);
    }

    /**
     * Sets a range axis and, if requested, sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param index  the axis index.
     * @param axis  the axis.
     * @param notify  notify listeners?
     */
    public void setRangeAxis(int index, ValueAxis axis, boolean notify) {
        ValueAxis existing = (ValueAxis) this.rangeAxes.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }
        if (axis != null) {
            axis.setPlot(this);
        }
        this.rangeAxes.set(index, axis);
        if (axis != null) {
            axis.configure();
            axis.addChangeListener(this);
        }
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Sets the range axes for this plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param axes  the axes (<code>null not permitted).
     *
     * @see #setDomainAxes(CategoryAxis[])
     */
    public void setRangeAxes(ValueAxis[] axes) {
        for (int i = 0; i < axes.length; i++) {
            setRangeAxis(i, axes[i], false);
        }
        fireChangeEvent();
    }

    /**
     * Returns the index of the specified axis, or <code>-1 if the axis
     * is not assigned to the plot.
     *
     * @param axis  the axis (<code>null not permitted).
     *
     * @return The axis index.
     *
     * @see #getRangeAxis(int)
     * @see #getDomainAxisIndex(CategoryAxis)
     *
     * @since 1.0.7
     */
    public int getRangeAxisIndex(ValueAxis axis) {
        if (axis == null) {
            throw new IllegalArgumentException("Null 'axis' argument.");
        }
        int result = this.rangeAxes.indexOf(axis);
        if (result < 0) { // try the parent plot
            Plot parent = getParent();
            if (parent instanceof CategoryPlot) {
                CategoryPlot p = (CategoryPlot) parent;
                result = p.getRangeAxisIndex(axis);
            }
        }
        return result;
    }

    /**
     * Returns the range axis location.
     *
     * @return The location (never <code>null).
     */
    public AxisLocation getRangeAxisLocation() {
        return getRangeAxisLocation(0);
    }

    /**
     * Returns the location for a range axis.
     *
     * @param index  the axis index.
     *
     * @return The location.
     *
     * @see #setRangeAxisLocation(int, AxisLocation)
     */
    public AxisLocation getRangeAxisLocation(int index) {
        AxisLocation result = null;
        if (index < this.rangeAxisLocations.size()) {
            result = (AxisLocation) this.rangeAxisLocations.get(index);
        }
        if (result == null) {
            result = AxisLocation.getOpposite(getRangeAxisLocation(0));
        }
        return result;
    }

    /**
     * Sets the location of the range axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param location  the location (<code>null not permitted).
     *
     * @see #setRangeAxisLocation(AxisLocation, boolean)
     * @see #setDomainAxisLocation(AxisLocation)
     */
    public void setRangeAxisLocation(AxisLocation location) {
        // defer argument checking...
        setRangeAxisLocation(location, true);
    }

    /**
     * Sets the location of the range axis and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param location  the location (<code>null not permitted).
     * @param notify  notify listeners?
     *
     * @see #setDomainAxisLocation(AxisLocation, boolean)
     */
    public void setRangeAxisLocation(AxisLocation location, boolean notify) {
        setRangeAxisLocation(0, location, notify);
    }

    /**
     * Sets the location for a range axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param index  the axis index.
     * @param location  the location.
     *
     * @see #getRangeAxisLocation(int)
     * @see #setRangeAxisLocation(int, AxisLocation, boolean)
     */
    public void setRangeAxisLocation(int index, AxisLocation location) {
        setRangeAxisLocation(index, location, true);
    }

    /**
     * Sets the location for a range axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param index  the axis index.
     * @param location  the location.
     * @param notify  notify listeners?
     *
     * @see #getRangeAxisLocation(int)
     * @see #setDomainAxisLocation(int, AxisLocation, boolean)
     */
    public void setRangeAxisLocation(int index, AxisLocation location,
                                     boolean notify) {
        if (index == 0 && location == null) {
            throw new IllegalArgumentException(
                    "Null 'location' for index 0 not permitted.");
        }
        this.rangeAxisLocations.set(index, location);
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the edge where the primary range axis is located.
     *
     * @return The edge (never <code>null).
     */
    public RectangleEdge getRangeAxisEdge() {
        return getRangeAxisEdge(0);
    }

    /**
     * Returns the edge for a range axis.
     *
     * @param index  the axis index.
     *
     * @return The edge.
     */
    public RectangleEdge getRangeAxisEdge(int index) {
        AxisLocation location = getRangeAxisLocation(index);
        RectangleEdge result = Plot.resolveRangeAxisLocation(location,
                this.orientation);
        if (result == null) {
            result = RectangleEdge.opposite(getRangeAxisEdge(0));
        }
        return result;
    }

    /**
     * Returns the number of range axes.
     *
     * @return The axis count.
     */
    public int getRangeAxisCount() {
        return this.rangeAxes.size();
    }

    /**
     * Clears the range axes from the plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     */
    public void clearRangeAxes() {
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis axis = (ValueAxis) this.rangeAxes.get(i);
            if (axis != null) {
                axis.removeChangeListener(this);
            }
        }
        this.rangeAxes.clear();
        fireChangeEvent();
    }

    /**
     * Configures the range axes.
     */
    public void configureRangeAxes() {
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis axis = (ValueAxis) this.rangeAxes.get(i);
            if (axis != null) {
                axis.configure();
            }
        }
    }

    /**
     * Returns the primary dataset for the plot.
     *
     * @return The primary dataset (possibly <code>null).
     *
     * @see #setDataset(CategoryDataset)
     */
    public CategoryDataset getDataset() {
        return getDataset(0);
    }

    /**
     * Returns the dataset at the given index.
     *
     * @param index  the dataset index.
     *
     * @return The dataset (possibly <code>null).
     *
     * @see #setDataset(int, CategoryDataset)
     */
    public CategoryDataset getDataset(int index) {
        CategoryDataset result = null;
        if (this.datasets.size() > index) {
            result = (CategoryDataset) this.datasets.get(index);
        }
        return result;
    }

    /**
     * Sets the dataset for the plot, replacing the existing dataset, if there
     * is one.  This method also calls the
     * {@link #datasetChanged(DatasetChangeEvent)} method, which adjusts the
     * axis ranges if necessary and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param dataset  the dataset (<code>null permitted).
     *
     * @see #getDataset()
     */
    public void setDataset(CategoryDataset dataset) {
        setDataset(0, dataset);
    }

    /**
     * Sets a dataset for the plot.
     *
     * @param index  the dataset index.
     * @param dataset  the dataset (<code>null permitted).
     *
     * @see #getDataset(int)
     */
    public void setDataset(int index, CategoryDataset dataset) {

        CategoryDataset existing = (CategoryDataset) this.datasets.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }
        this.datasets.set(index, dataset);
        if (dataset != null) {
            dataset.addChangeListener(this);
        }

        // send a dataset change event to self...
        DatasetChangeEvent event = new DatasetChangeEvent(this, dataset);
        datasetChanged(event);

    }

    /**
     * Returns the number of datasets.
     *
     * @return The number of datasets.
     *
     * @since 1.0.2
     */
    public int getDatasetCount() {
        return this.datasets.size();
    }

    /**
     * Returns the index of the specified dataset, or <code>-1 if the
     * dataset does not belong to the plot.
     *
     * @param dataset  the dataset (<code>null not permitted).
     *
     * @return The index.
     *
     * @since 1.0.11
     */
    public int indexOf(CategoryDataset dataset) {
        int result = -1;
        for (int i = 0; i < this.datasets.size(); i++) {
            if (dataset == this.datasets.get(i)) {
                result = i;
                break;
            }
        }
        return result;
    }

    /**
     * Maps a dataset to a particular domain axis.
     *
     * @param index  the dataset index (zero-based).
     * @param axisIndex  the axis index (zero-based).
     *
     * @see #getDomainAxisForDataset(int)
     */
    public void mapDatasetToDomainAxis(int index, int axisIndex) {
        List axisIndices = new java.util.ArrayList(1);
        axisIndices.add(new Integer(axisIndex));
        mapDatasetToDomainAxes(index, axisIndices);
    }

    /**
     * Maps the specified dataset to the axes in the list.  Note that the
     * conversion of data values into Java2D space is always performed using
     * the first axis in the list.
     *
     * @param index  the dataset index (zero-based).
     * @param axisIndices  the axis indices (<code>null permitted).
     *
     * @since 1.0.12
     */
    public void mapDatasetToDomainAxes(int index, List axisIndices) {
        if (index < 0) {
            throw new IllegalArgumentException("Requires 'index' >= 0.");
        }
        checkAxisIndices(axisIndices);
        Integer key = new Integer(index);
        this.datasetToDomainAxesMap.put(key, new ArrayList(axisIndices));
        // fake a dataset change event to update axes...
        datasetChanged(new DatasetChangeEvent(this, getDataset(index)));
    }

    /**
     * This method is used to perform argument checking on the list of
     * axis indices passed to mapDatasetToDomainAxes() and
     * mapDatasetToRangeAxes().
     *
     * @param indices  the list of indices (<code>null permitted).
     */
    private void checkAxisIndices(List indices) {
        // axisIndices can be:
        // 1.  null;
        // 2.  non-empty, containing only Integer objects that are unique.
        if (indices == null) {
            return;  // OK
        }
        int count = indices.size();
        if (count == 0) {
            throw new IllegalArgumentException("Empty list not permitted.");
        }
        HashSet set = new HashSet();
        for (int i = 0; i < count; i++) {
            Object item = indices.get(i);
            if (!(item instanceof Integer)) {
                throw new IllegalArgumentException(
                        "Indices must be Integer instances.");
            }
            if (set.contains(item)) {
                throw new IllegalArgumentException("Indices must be unique.");
            }
            set.add(item);
        }
    }

    /**
     * Returns the domain axis for a dataset.  You can change the axis for a
     * dataset using the {@link #mapDatasetToDomainAxis(int, int)} method.
     *
     * @param index  the dataset index.
     *
     * @return The domain axis.
     *
     * @see #mapDatasetToDomainAxis(int, int)
     */
    public CategoryAxis getDomainAxisForDataset(int index) {
        if (index < 0) {
            throw new IllegalArgumentException("Negative 'index'.");
        }
        CategoryAxis axis = null;
        List axisIndices = (List) this.datasetToDomainAxesMap.get(
                new Integer(index));
        if (axisIndices != null) {
            // the first axis in the list is used for data <--> Java2D
            Integer axisIndex = (Integer) axisIndices.get(0);
            axis = getDomainAxis(axisIndex.intValue());
        }
        else {
            axis = getDomainAxis(0);
        }
        return axis;
    }

    /**
     * Maps a dataset to a particular range axis.
     *
     * @param index  the dataset index (zero-based).
     * @param axisIndex  the axis index (zero-based).
     *
     * @see #getRangeAxisForDataset(int)
     */
    public void mapDatasetToRangeAxis(int index, int axisIndex) {
        List axisIndices = new java.util.ArrayList(1);
        axisIndices.add(new Integer(axisIndex));
        mapDatasetToRangeAxes(index, axisIndices);
    }

    /**
     * Maps the specified dataset to the axes in the list.  Note that the
     * conversion of data values into Java2D space is always performed using
     * the first axis in the list.
     *
     * @param index  the dataset index (zero-based).
     * @param axisIndices  the axis indices (<code>null permitted).
     *
     * @since 1.0.12
     */
    public void mapDatasetToRangeAxes(int index, List axisIndices) {
        if (index < 0) {
            throw new IllegalArgumentException("Requires 'index' >= 0.");
        }
        checkAxisIndices(axisIndices);
        Integer key = new Integer(index);
        this.datasetToRangeAxesMap.put(key, new ArrayList(axisIndices));
        // fake a dataset change event to update axes...
        datasetChanged(new DatasetChangeEvent(this, getDataset(index)));
    }

    /**
     * Returns the range axis for a dataset.  You can change the axis for a
     * dataset using the {@link #mapDatasetToRangeAxis(int, int)} method.
     *
     * @param index  the dataset index.
     *
     * @return The range axis.
     *
     * @see #mapDatasetToRangeAxis(int, int)
     */
    public ValueAxis getRangeAxisForDataset(int index) {
        if (index < 0) {
            throw new IllegalArgumentException("Negative 'index'.");
        }
        ValueAxis axis = null;
        List axisIndices = (List) this.datasetToRangeAxesMap.get(
                new Integer(index));
        if (axisIndices != null) {
            // the first axis in the list is used for data <--> Java2D
            Integer axisIndex = (Integer) axisIndices.get(0);
            axis = getRangeAxis(axisIndex.intValue());
        }
        else {
            axis = getRangeAxis(0);
        }
        return axis;
    }

    /**
     * Returns the number of renderer slots for this plot.
     *
     * @return The number of renderer slots.
     *
     * @since 1.0.11
     */
    public int getRendererCount() {
        return this.renderers.size();
    }

    /**
     * Returns a reference to the renderer for the plot.
     *
     * @return The renderer.
     *
     * @see #setRenderer(CategoryItemRenderer)
     */
    public CategoryItemRenderer getRenderer() {
        return getRenderer(0);
    }

    /**
     * Returns the renderer at the given index.
     *
     * @param index  the renderer index.
     *
     * @return The renderer (possibly <code>null).
     *
     * @see #setRenderer(int, CategoryItemRenderer)
     */
    public CategoryItemRenderer getRenderer(int index) {
        CategoryItemRenderer result = null;
        if (this.renderers.size() > index) {
            result = (CategoryItemRenderer) this.renderers.get(index);
        }
        return result;
    }

    /**
     * Sets the renderer at index 0 (sometimes referred to as the "primary"
     * renderer) and sends a {@link PlotChangeEvent} to all registered
     * listeners.
     *
     * @param renderer  the renderer (<code>null permitted.
     *
     * @see #getRenderer()
     */
    public void setRenderer(CategoryItemRenderer renderer) {
        setRenderer(0, renderer, true);
    }

    /**
     * Sets the renderer at index 0 (sometimes referred to as the "primary"
     * renderer) and, if requested, sends a {@link PlotChangeEvent} to all
     * registered listeners.
     * <p>
     * You can set the renderer to <code>null, but this is not
     * recommended because:
     * <ul>
     *   <li>no data will be displayed;
     *   <li>the plot background will not be painted;
     * </ul>
     *
     * @param renderer  the renderer (<code>null permitted).
     * @param notify  notify listeners?
     *
     * @see #getRenderer()
     */
    public void setRenderer(CategoryItemRenderer renderer, boolean notify) {
        setRenderer(0, renderer, notify);
    }

    /**
     * Sets the renderer at the specified index and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index  the index.
     * @param renderer  the renderer (<code>null permitted).
     *
     * @see #getRenderer(int)
     * @see #setRenderer(int, CategoryItemRenderer, boolean)
     */
    public void setRenderer(int index, CategoryItemRenderer renderer) {
        setRenderer(index, renderer, true);
    }

    /**
     * Sets a renderer.  A {@link PlotChangeEvent} is sent to all registered
     * listeners.
     *
     * @param index  the index.
     * @param renderer  the renderer (<code>null permitted).
     * @param notify  notify listeners?
     *
     * @see #getRenderer(int)
     */
    public void setRenderer(int index, CategoryItemRenderer renderer,
                            boolean notify) {

        // stop listening to the existing renderer...
        CategoryItemRenderer existing
            = (CategoryItemRenderer) this.renderers.get(index);
        if (existing != null) {
            existing.removeChangeListener(this);
        }

        // register the new renderer...
        this.renderers.set(index, renderer);
        if (renderer != null) {
            renderer.setPlot(this);
            renderer.addChangeListener(this);
        }

        configureDomainAxes();
        configureRangeAxes();

        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Sets the renderers for this plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param renderers  the renderers.
     */
    public void setRenderers(CategoryItemRenderer[] renderers) {
        for (int i = 0; i < renderers.length; i++) {
            setRenderer(i, renderers[i], false);
        }
        fireChangeEvent();
    }

    /**
     * Returns the renderer for the specified dataset.  If the dataset doesn't
     * belong to the plot, this method will return <code>null.
     *
     * @param dataset  the dataset (<code>null permitted).
     *
     * @return The renderer (possibly <code>null).
     */
    public CategoryItemRenderer getRendererForDataset(CategoryDataset dataset) {
        CategoryItemRenderer result = null;
        for (int i = 0; i < this.datasets.size(); i++) {
            if (this.datasets.get(i) == dataset) {
                result = (CategoryItemRenderer) this.renderers.get(i);
                break;
            }
        }
        return result;
    }

    /**
     * Returns the index of the specified renderer, or <code>-1 if the
     * renderer is not assigned to this plot.
     *
     * @param renderer  the renderer (<code>null permitted).
     *
     * @return The renderer index.
     */
    public int getIndexOf(CategoryItemRenderer renderer) {
        return this.renderers.indexOf(renderer);
    }

    /**
     * Returns the dataset rendering order.
     *
     * @return The order (never <code>null).
     *
     * @see #setDatasetRenderingOrder(DatasetRenderingOrder)
     */
    public DatasetRenderingOrder getDatasetRenderingOrder() {
        return this.renderingOrder;
    }

    /**
     * Sets the rendering order and sends a {@link PlotChangeEvent} to all
     * registered listeners.  By default, the plot renders the primary dataset
     * last (so that the primary dataset overlays the secondary datasets).  You
     * can reverse this if you want to.
     *
     * @param order  the rendering order (<code>null not permitted).
     *
     * @see #getDatasetRenderingOrder()
     */
    public void setDatasetRenderingOrder(DatasetRenderingOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");
        }
        this.renderingOrder = order;
        fireChangeEvent();
    }

    /**
     * Returns the order in which the columns are rendered.  The default value
     * is <code>SortOrder.ASCENDING.
     *
     * @return The column rendering order (never <code>null not permitted).
     *
     * @see #getColumnRenderingOrder()
     * @see #setRowRenderingOrder(SortOrder)
     */
    public void setColumnRenderingOrder(SortOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");
        }
        this.columnRenderingOrder = order;
        fireChangeEvent();
    }

    /**
     * Returns the order in which the rows should be rendered.  The default
     * value is <code>SortOrder.ASCENDING.
     *
     * @return The order (never <code>null).
     *
     * @see #setRowRenderingOrder(SortOrder)
     */
    public SortOrder getRowRenderingOrder() {
        return this.rowRenderingOrder;
    }

    /**
     * Sets the row order in which the items in each dataset should be
     * rendered and sends a {@link PlotChangeEvent} to all registered
     * listeners.  Note that this affects the order in which items are drawn,
     * NOT their position in the chart.
     *
     * @param order  the order (<code>null not permitted).
     *
     * @see #getRowRenderingOrder()
     * @see #setColumnRenderingOrder(SortOrder)
     */
    public void setRowRenderingOrder(SortOrder order) {
        if (order == null) {
            throw new IllegalArgumentException("Null 'order' argument.");
        }
        this.rowRenderingOrder = order;
        fireChangeEvent();
    }

    /**
     * Returns the flag that controls whether the domain grid-lines are visible.
     *
     * @return The <code>true or false.
     *
     * @see #setDomainGridlinesVisible(boolean)
     */
    public boolean isDomainGridlinesVisible() {
        return this.domainGridlinesVisible;
    }

    /**
     * Sets the flag that controls whether or not grid-lines are drawn against
     * the domain axis.
     * <p>
     * If the flag value changes, a {@link PlotChangeEvent} is sent to all
     * registered listeners.
     *
     * @param visible  the new value of the flag.
     *
     * @see #isDomainGridlinesVisible()
     */
    public void setDomainGridlinesVisible(boolean visible) {
        if (this.domainGridlinesVisible != visible) {
            this.domainGridlinesVisible = visible;
            fireChangeEvent();
        }
    }

    /**
     * Returns the position used for the domain gridlines.
     *
     * @return The gridline position (never <code>null).
     *
     * @see #setDomainGridlinePosition(CategoryAnchor)
     */
    public CategoryAnchor getDomainGridlinePosition() {
        return this.domainGridlinePosition;
    }

    /**
     * Sets the position used for the domain gridlines and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param position  the position (<code>null not permitted).
     *
     * @see #getDomainGridlinePosition()
     */
    public void setDomainGridlinePosition(CategoryAnchor position) {
        if (position == null) {
            throw new IllegalArgumentException("Null 'position' argument.");
        }
        this.domainGridlinePosition = position;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used to draw grid-lines against the domain axis.
     *
     * @return The stroke (never <code>null).
     *
     * @see #setDomainGridlineStroke(Stroke)
     */
    public Stroke getDomainGridlineStroke() {
        return this.domainGridlineStroke;
    }

    /**
     * Sets the stroke used to draw grid-lines against the domain axis and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @see #getDomainGridlineStroke()
     */
    public void setDomainGridlineStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' not permitted.");
        }
        this.domainGridlineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to draw grid-lines against the domain axis.
     *
     * @return The paint (never <code>null).
     *
     * @see #setDomainGridlinePaint(Paint)
     */
    public Paint getDomainGridlinePaint() {
        return this.domainGridlinePaint;
    }

    /**
     * Sets the paint used to draw the grid-lines (if any) against the domain
     * axis and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getDomainGridlinePaint()
     */
    public void setDomainGridlinePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.domainGridlinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns a flag that controls whether or not a zero baseline is
     * displayed for the range axis.
     *
     * @return A boolean.
     *
     * @see #setRangeZeroBaselineVisible(boolean)
     *
     * @since 1.0.13
     */
    public boolean isRangeZeroBaselineVisible() {
        return this.rangeZeroBaselineVisible;
    }

    /**
     * Sets the flag that controls whether or not the zero baseline is
     * displayed for the range axis, and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param visible  the flag.
     *
     * @see #isRangeZeroBaselineVisible()
     *
     * @since 1.0.13
     */
    public void setRangeZeroBaselineVisible(boolean visible) {
        this.rangeZeroBaselineVisible = visible;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used for the zero baseline against the range axis.
     *
     * @return The stroke (never <code>null).
     *
     * @see #setRangeZeroBaselineStroke(Stroke)
     *
     * @since 1.0.13
     */
    public Stroke getRangeZeroBaselineStroke() {
        return this.rangeZeroBaselineStroke;
    }

    /**
     * Sets the stroke for the zero baseline for the range axis,
     * and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @see #getRangeZeroBaselineStroke()
     *
     * @since 1.0.13
     */
    public void setRangeZeroBaselineStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.rangeZeroBaselineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the paint for the zero baseline (if any) plotted against the
     * range axis.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRangeZeroBaselinePaint(Paint)
     *
     * @since 1.0.13
     */
    public Paint getRangeZeroBaselinePaint() {
        return this.rangeZeroBaselinePaint;
    }

    /**
     * Sets the paint for the zero baseline plotted against the range axis and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRangeZeroBaselinePaint()
     *
     * @since 1.0.13
     */
    public void setRangeZeroBaselinePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.rangeZeroBaselinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the flag that controls whether the range grid-lines are visible.
     *
     * @return The flag.
     *
     * @see #setRangeGridlinesVisible(boolean)
     */
    public boolean isRangeGridlinesVisible() {
        return this.rangeGridlinesVisible;
    }

    /**
     * Sets the flag that controls whether or not grid-lines are drawn against
     * the range axis.  If the flag changes value, a {@link PlotChangeEvent} is
     * sent to all registered listeners.
     *
     * @param visible  the new value of the flag.
     *
     * @see #isRangeGridlinesVisible()
     */
    public void setRangeGridlinesVisible(boolean visible) {
        if (this.rangeGridlinesVisible != visible) {
            this.rangeGridlinesVisible = visible;
            fireChangeEvent();
        }
    }

    /**
     * Returns the stroke used to draw the grid-lines against the range axis.
     *
     * @return The stroke (never <code>null).
     *
     * @see #setRangeGridlineStroke(Stroke)
     */
    public Stroke getRangeGridlineStroke() {
        return this.rangeGridlineStroke;
    }

    /**
     * Sets the stroke used to draw the grid-lines against the range axis and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @see #getRangeGridlineStroke()
     */
    public void setRangeGridlineStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.rangeGridlineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to draw the grid-lines against the range axis.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRangeGridlinePaint(Paint)
     */
    public Paint getRangeGridlinePaint() {
        return this.rangeGridlinePaint;
    }

    /**
     * Sets the paint used to draw the grid lines against the range axis and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRangeGridlinePaint()
     */
    public void setRangeGridlinePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.rangeGridlinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns <code>true if the range axis minor grid is visible, and
     * <code>false otherwise.
     *
     * @return A boolean.
     *
     * @see #setRangeMinorGridlinesVisible(boolean)
     *
     * @since 1.0.13
     */
    public boolean isRangeMinorGridlinesVisible() {
        return this.rangeMinorGridlinesVisible;
    }

    /**
     * Sets the flag that controls whether or not the range axis minor grid
     * lines are visible.
     * <p>
     * If the flag value is changed, a {@link PlotChangeEvent} is sent to all
     * registered listeners.
     *
     * @param visible  the new value of the flag.
     *
     * @see #isRangeMinorGridlinesVisible()
     *
     * @since 1.0.13
     */
    public void setRangeMinorGridlinesVisible(boolean visible) {
        if (this.rangeMinorGridlinesVisible != visible) {
            this.rangeMinorGridlinesVisible = visible;
            fireChangeEvent();
        }
    }

    /**
     * Returns the stroke for the minor grid lines (if any) plotted against the
     * range axis.
     *
     * @return The stroke (never <code>null).
     *
     * @see #setRangeMinorGridlineStroke(Stroke)
     *
     * @since 1.0.13
     */
    public Stroke getRangeMinorGridlineStroke() {
        return this.rangeMinorGridlineStroke;
    }

    /**
     * Sets the stroke for the minor grid lines plotted against the range axis,
     * and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @see #getRangeMinorGridlineStroke()
     *
     * @since 1.0.13
     */
    public void setRangeMinorGridlineStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.rangeMinorGridlineStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the paint for the minor grid lines (if any) plotted against the
     * range axis.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRangeMinorGridlinePaint(Paint)
     *
     * @since 1.0.13
     */
    public Paint getRangeMinorGridlinePaint() {
        return this.rangeMinorGridlinePaint;
    }

    /**
     * Sets the paint for the minor grid lines plotted against the range axis
     * and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRangeMinorGridlinePaint()
     *
     * @since 1.0.13
     */
    public void setRangeMinorGridlinePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.rangeMinorGridlinePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the fixed legend items, if any.
     *
     * @return The legend items (possibly <code>null).
     *
     * @see #setFixedLegendItems(LegendItemCollection)
     */
    public LegendItemCollection getFixedLegendItems() {
        return this.fixedLegendItems;
    }

    /**
     * Sets the fixed legend items for the plot.  Leave this set to
     * <code>null if you prefer the legend items to be created
     * automatically.
     *
     * @param items  the legend items (<code>null permitted).
     *
     * @see #getFixedLegendItems()
     */
    public void setFixedLegendItems(LegendItemCollection items) {
        this.fixedLegendItems = items;
        fireChangeEvent();
    }

    /**
     * Returns the legend items for the plot.  By default, this method creates
     * a legend item for each series in each of the datasets.  You can change
     * this behaviour by overriding this method.
     *
     * @return The legend items.
     */
    public LegendItemCollection getLegendItems() {
        LegendItemCollection result = this.fixedLegendItems;
        if (result == null) {
            result = new LegendItemCollection();
            // get the legend items for the datasets...
            int count = this.datasets.size();
            for (int datasetIndex = 0; datasetIndex < count; datasetIndex++) {
                CategoryDataset dataset = getDataset(datasetIndex);
                if (dataset != null) {
                    CategoryItemRenderer renderer = getRenderer(datasetIndex);
                    if (renderer != null) {
                        int seriesCount = dataset.getRowCount();
                        for (int i = 0; i < seriesCount; i++) {
                            LegendItem item = renderer.getLegendItem(
                                    datasetIndex, i);
                            if (item != null) {
                                result.add(item);
                            }
                        }
                    }
                }
            }
        }
        return result;
    }

    /**
     * Handles a 'click' on the plot by updating the anchor value.
     *
     * @param x  x-coordinate of the click (in Java2D space).
     * @param y  y-coordinate of the click (in Java2D space).
     * @param info  information about the plot's dimensions.
     *
     */
    public void handleClick(int x, int y, PlotRenderingInfo info) {

        Rectangle2D dataArea = info.getDataArea();
        if (dataArea.contains(x, y)) {
            // set the anchor value for the range axis...
            double java2D = 0.0;
            if (this.orientation == PlotOrientation.HORIZONTAL) {
                java2D = x;
            }
            else if (this.orientation == PlotOrientation.VERTICAL) {
                java2D = y;
            }
            RectangleEdge edge = Plot.resolveRangeAxisLocation(
                    getRangeAxisLocation(), this.orientation);
            double value = getRangeAxis().java2DToValue(
                    java2D, info.getDataArea(), edge);
            setAnchorValue(value);
            setRangeCrosshairValue(value);
        }

    }

    /**
     * Zooms (in or out) on the plot's value axis.
     * <p>
     * If the value 0.0 is passed in as the zoom percent, the auto-range
     * calculation for the axis is restored (which sets the range to include
     * the minimum and maximum data values, thus displaying all the data).
     *
     * @param percent  the zoom amount.
     */
    public void zoom(double percent) {

        if (percent > 0.0) {
            double range = getRangeAxis().getRange().getLength();
            double scaledRange = range * percent;
            getRangeAxis().setRange(this.anchorValue - scaledRange / 2.0,
                    this.anchorValue + scaledRange / 2.0);
        }
        else {
            getRangeAxis().setAutoRange(true);
        }

    }

    /**
     * Receives notification of a change to the plot's dataset.
     * <P>
     * The range axis bounds will be recalculated if necessary.
     *
     * @param event  information about the event (not used here).
     */
    public void datasetChanged(DatasetChangeEvent event) {

        int count = this.rangeAxes.size();
        for (int axisIndex = 0; axisIndex < count; axisIndex++) {
            ValueAxis yAxis = getRangeAxis(axisIndex);
            if (yAxis != null) {
                yAxis.configure();
            }
        }
        if (getParent() != null) {
            getParent().datasetChanged(event);
        }
        else {
            PlotChangeEvent e = new PlotChangeEvent(this);
            e.setType(ChartChangeEventType.DATASET_UPDATED);
            notifyListeners(e);
        }

    }

    /**
     * Receives notification of a renderer change event.
     *
     * @param event  the event.
     */
    public void rendererChanged(RendererChangeEvent event) {
        Plot parent = getParent();
        if (parent != null) {
            if (parent instanceof RendererChangeListener) {
                RendererChangeListener rcl = (RendererChangeListener) parent;
                rcl.rendererChanged(event);
            }
            else {
                // this should never happen with the existing code, but throw
                // an exception in case future changes make it possible...
                throw new RuntimeException(
                    "The renderer has changed and I don't know what to do!");
            }
        }
        else {
            configureRangeAxes();
            PlotChangeEvent e = new PlotChangeEvent(this);
            notifyListeners(e);
        }
    }

    /**
     * Adds a marker for display (in the foreground) against the domain axis and
     * sends a {@link PlotChangeEvent} to all registered listeners. Typically a
     * marker will be drawn by the renderer as a line perpendicular to the
     * domain axis, however this is entirely up to the renderer.
     *
     * @param marker  the marker (<code>null not permitted).
     *
     * @see #removeDomainMarker(Marker)
     */
    public void addDomainMarker(CategoryMarker marker) {
        addDomainMarker(marker, Layer.FOREGROUND);
    }

    /**
     * Adds a marker for display against the domain axis and sends a
     * {@link PlotChangeEvent} to all registered listeners.  Typically a marker
     * will be drawn by the renderer as a line perpendicular to the domain
     * axis, however this is entirely up to the renderer.
     *
     * @param marker  the marker (<code>null not permitted).
     * @param layer  the layer (foreground or background) (<code>null
     *               not permitted).
     *
     * @see #removeDomainMarker(Marker, Layer)
     */
    public void addDomainMarker(CategoryMarker marker, Layer layer) {
        addDomainMarker(0, marker, layer);
    }

    /**
     * Adds a marker for display by a particular renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     * <P>
     * Typically a marker will be drawn by the renderer as a line perpendicular
     * to a domain axis, however this is entirely up to the renderer.
     *
     * @param index  the renderer index.
     * @param marker  the marker (<code>null not permitted).
     * @param layer  the layer (<code>null not permitted).
     *
     * @see #removeDomainMarker(int, Marker, Layer)
     */
    public void addDomainMarker(int index, CategoryMarker marker, Layer layer) {
        addDomainMarker(index, marker, layer, true);
    }

    /**
     * Adds a marker for display by a particular renderer and, if requested,
     * sends a {@link PlotChangeEvent} to all registered listeners.
     * <P>
     * Typically a marker will be drawn by the renderer as a line perpendicular
     * to a domain axis, however this is entirely up to the renderer.
     *
     * @param index  the renderer index.
     * @param marker  the marker (<code>null not permitted).
     * @param layer  the layer (<code>null not permitted).
     * @param notify  notify listeners?
     *
     * @since 1.0.10
     *
     * @see #removeDomainMarker(int, Marker, Layer, boolean)
     */
    public void addDomainMarker(int index, CategoryMarker marker, Layer layer,
            boolean notify) {
        if (marker == null) {
            throw new IllegalArgumentException("Null 'marker' not permitted.");
        }
        if (layer == null) {
            throw new IllegalArgumentException("Null 'layer' not permitted.");
        }
        Collection markers;
        if (layer == Layer.FOREGROUND) {
            markers = (Collection) this.foregroundDomainMarkers.get(
                    new Integer(index));
            if (markers == null) {
                markers = new java.util.ArrayList();
                this.foregroundDomainMarkers.put(new Integer(index), markers);
            }
            markers.add(marker);
        }
        else if (layer == Layer.BACKGROUND) {
            markers = (Collection) this.backgroundDomainMarkers.get(
                    new Integer(index));
            if (markers == null) {
                markers = new java.util.ArrayList();
                this.backgroundDomainMarkers.put(new Integer(index), markers);
            }
            markers.add(marker);
        }
        marker.addChangeListener(this);
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Clears all the domain markers for the plot and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @see #clearRangeMarkers()
     */
    public void clearDomainMarkers() {
        if (this.backgroundDomainMarkers != null) {
            Set keys = this.backgroundDomainMarkers.keySet();
            Iterator iterator = keys.iterator();
            while (iterator.hasNext()) {
                Integer key = (Integer) iterator.next();
                clearDomainMarkers(key.intValue());
            }
            this.backgroundDomainMarkers.clear();
        }
        if (this.foregroundDomainMarkers != null) {
            Set keys = this.foregroundDomainMarkers.keySet();
            Iterator iterator = keys.iterator();
            while (iterator.hasNext()) {
                Integer key = (Integer) iterator.next();
                clearDomainMarkers(key.intValue());
            }
            this.foregroundDomainMarkers.clear();
        }
        fireChangeEvent();
    }

    /**
     * Returns the list of domain markers (read only) for the specified layer.
     *
     * @param layer  the layer (foreground or background).
     *
     * @return The list of domain markers.
     */
    public Collection getDomainMarkers(Layer layer) {
        return getDomainMarkers(0, layer);
    }

    /**
     * Returns a collection of domain markers for a particular renderer and
     * layer.
     *
     * @param index  the renderer index.
     * @param layer  the layer.
     *
     * @return A collection of markers (possibly <code>null).
     */
    public Collection getDomainMarkers(int index, Layer layer) {
        Collection result = null;
        Integer key = new Integer(index);
        if (layer == Layer.FOREGROUND) {
            result = (Collection) this.foregroundDomainMarkers.get(key);
        }
        else if (layer == Layer.BACKGROUND) {
            result = (Collection) this.backgroundDomainMarkers.get(key);
        }
        if (result != null) {
            result = Collections.unmodifiableCollection(result);
        }
        return result;
    }

    /**
     * Clears all the domain markers for the specified renderer.
     *
     * @param index  the renderer index.
     *
     * @see #clearRangeMarkers(int)
     */
    public void clearDomainMarkers(int index) {
        Integer key = new Integer(index);
        if (this.backgroundDomainMarkers != null) {
            Collection markers
                = (Collection) this.backgroundDomainMarkers.get(key);
            if (markers != null) {
                Iterator iterator = markers.iterator();
                while (iterator.hasNext()) {
                    Marker m = (Marker) iterator.next();
                    m.removeChangeListener(this);
                }
                markers.clear();
            }
        }
        if (this.foregroundDomainMarkers != null) {
            Collection markers
                = (Collection) this.foregroundDomainMarkers.get(key);
            if (markers != null) {
                Iterator iterator = markers.iterator();
                while (iterator.hasNext()) {
                    Marker m = (Marker) iterator.next();
                    m.removeChangeListener(this);
                }
                markers.clear();
            }
        }
        fireChangeEvent();
    }

    /**
     * Removes a marker for the domain axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param marker  the marker.
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     */
    public boolean removeDomainMarker(Marker marker) {
        return removeDomainMarker(marker, Layer.FOREGROUND);
    }

    /**
     * Removes a marker for the domain axis in the specified layer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param marker the marker (<code>null not permitted).
     * @param layer the layer (foreground or background).
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     */
    public boolean removeDomainMarker(Marker marker, Layer layer) {
        return removeDomainMarker(0, marker, layer);
    }

    /**
     * Removes a marker for a specific dataset/renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index the dataset/renderer index.
     * @param marker the marker.
     * @param layer the layer (foreground or background).
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     */
    public boolean removeDomainMarker(int index, Marker marker, Layer layer) {
        return removeDomainMarker(index, marker, layer, true);
    }

    /**
     * Removes a marker for a specific dataset/renderer and, if requested,
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index the dataset/renderer index.
     * @param marker the marker.
     * @param layer the layer (foreground or background).
     * @param notify  notify listeners?
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.10
     */
    public boolean removeDomainMarker(int index, Marker marker, Layer layer,
            boolean notify) {
        ArrayList markers;
        if (layer == Layer.FOREGROUND) {
            markers = (ArrayList) this.foregroundDomainMarkers.get(new Integer(
                    index));
        }
        else {
            markers = (ArrayList) this.backgroundDomainMarkers.get(new Integer(
                    index));
        }
        if (markers == null) {
            return false;
        }
        boolean removed = markers.remove(marker);
        if (removed && notify) {
            fireChangeEvent();
        }
        return removed;
    }

    /**
     * Adds a marker for display (in the foreground) against the range axis and
     * sends a {@link PlotChangeEvent} to all registered listeners. Typically a
     * marker will be drawn by the renderer as a line perpendicular to the
     * range axis, however this is entirely up to the renderer.
     *
     * @param marker  the marker (<code>null not permitted).
     *
     * @see #removeRangeMarker(Marker)
     */
    public void addRangeMarker(Marker marker) {
        addRangeMarker(marker, Layer.FOREGROUND);
    }

    /**
     * Adds a marker for display against the range axis and sends a
     * {@link PlotChangeEvent} to all registered listeners.  Typically a marker
     * will be drawn by the renderer as a line perpendicular to the range axis,
     * however this is entirely up to the renderer.
     *
     * @param marker  the marker (<code>null not permitted).
     * @param layer  the layer (foreground or background) (<code>null
     *               not permitted).
     *
     * @see #removeRangeMarker(Marker, Layer)
     */
    public void addRangeMarker(Marker marker, Layer layer) {
        addRangeMarker(0, marker, layer);
    }

    /**
     * Adds a marker for display by a particular renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     * <P>
     * Typically a marker will be drawn by the renderer as a line perpendicular
     * to a range axis, however this is entirely up to the renderer.
     *
     * @param index  the renderer index.
     * @param marker  the marker.
     * @param layer  the layer.
     *
     * @see #removeRangeMarker(int, Marker, Layer)
     */
    public void addRangeMarker(int index, Marker marker, Layer layer) {
        addRangeMarker(index, marker, layer, true);
    }

    /**
     * Adds a marker for display by a particular renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     * <P>
     * Typically a marker will be drawn by the renderer as a line perpendicular
     * to a range axis, however this is entirely up to the renderer.
     *
     * @param index  the renderer index.
     * @param marker  the marker.
     * @param layer  the layer.
     * @param notify  notify listeners?
     *
     * @since 1.0.10
     *
     * @see #removeRangeMarker(int, Marker, Layer, boolean)
     */
    public void addRangeMarker(int index, Marker marker, Layer layer,
            boolean notify) {
        Collection markers;
        if (layer == Layer.FOREGROUND) {
            markers = (Collection) this.foregroundRangeMarkers.get(
                    new Integer(index));
            if (markers == null) {
                markers = new java.util.ArrayList();
                this.foregroundRangeMarkers.put(new Integer(index), markers);
            }
            markers.add(marker);
        }
        else if (layer == Layer.BACKGROUND) {
            markers = (Collection) this.backgroundRangeMarkers.get(
                    new Integer(index));
            if (markers == null) {
                markers = new java.util.ArrayList();
                this.backgroundRangeMarkers.put(new Integer(index), markers);
            }
            markers.add(marker);
        }
        marker.addChangeListener(this);
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Clears all the range markers for the plot and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @see #clearDomainMarkers()
     */
    public void clearRangeMarkers() {
        if (this.backgroundRangeMarkers != null) {
            Set keys = this.backgroundRangeMarkers.keySet();
            Iterator iterator = keys.iterator();
            while (iterator.hasNext()) {
                Integer key = (Integer) iterator.next();
                clearRangeMarkers(key.intValue());
            }
            this.backgroundRangeMarkers.clear();
        }
        if (this.foregroundRangeMarkers != null) {
            Set keys = this.foregroundRangeMarkers.keySet();
            Iterator iterator = keys.iterator();
            while (iterator.hasNext()) {
                Integer key = (Integer) iterator.next();
                clearRangeMarkers(key.intValue());
            }
            this.foregroundRangeMarkers.clear();
        }
        fireChangeEvent();
    }

    /**
     * Returns the list of range markers (read only) for the specified layer.
     *
     * @param layer  the layer (foreground or background).
     *
     * @return The list of range markers.
     *
     * @see #getRangeMarkers(int, Layer)
     */
    public Collection getRangeMarkers(Layer layer) {
        return getRangeMarkers(0, layer);
    }

    /**
     * Returns a collection of range markers for a particular renderer and
     * layer.
     *
     * @param index  the renderer index.
     * @param layer  the layer.
     *
     * @return A collection of markers (possibly <code>null).
     */
    public Collection getRangeMarkers(int index, Layer layer) {
        Collection result = null;
        Integer key = new Integer(index);
        if (layer == Layer.FOREGROUND) {
            result = (Collection) this.foregroundRangeMarkers.get(key);
        }
        else if (layer == Layer.BACKGROUND) {
            result = (Collection) this.backgroundRangeMarkers.get(key);
        }
        if (result != null) {
            result = Collections.unmodifiableCollection(result);
        }
        return result;
    }

    /**
     * Clears all the range markers for the specified renderer.
     *
     * @param index  the renderer index.
     *
     * @see #clearDomainMarkers(int)
     */
    public void clearRangeMarkers(int index) {
        Integer key = new Integer(index);
        if (this.backgroundRangeMarkers != null) {
            Collection markers
                = (Collection) this.backgroundRangeMarkers.get(key);
            if (markers != null) {
                Iterator iterator = markers.iterator();
                while (iterator.hasNext()) {
                    Marker m = (Marker) iterator.next();
                    m.removeChangeListener(this);
                }
                markers.clear();
            }
        }
        if (this.foregroundRangeMarkers != null) {
            Collection markers
                = (Collection) this.foregroundRangeMarkers.get(key);
            if (markers != null) {
                Iterator iterator = markers.iterator();
                while (iterator.hasNext()) {
                    Marker m = (Marker) iterator.next();
                    m.removeChangeListener(this);
                }
                markers.clear();
            }
        }
        fireChangeEvent();
    }

    /**
     * Removes a marker for the range axis and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param marker the marker.
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     *
     * @see #addRangeMarker(Marker)
     */
    public boolean removeRangeMarker(Marker marker) {
        return removeRangeMarker(marker, Layer.FOREGROUND);
    }

    /**
     * Removes a marker for the range axis in the specified layer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param marker the marker (<code>null not permitted).
     * @param layer the layer (foreground or background).
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     *
     * @see #addRangeMarker(Marker, Layer)
     */
    public boolean removeRangeMarker(Marker marker, Layer layer) {
        return removeRangeMarker(0, marker, layer);
    }

    /**
     * Removes a marker for a specific dataset/renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index the dataset/renderer index.
     * @param marker the marker.
     * @param layer the layer (foreground or background).
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.7
     *
     * @see #addRangeMarker(int, Marker, Layer)
     */
    public boolean removeRangeMarker(int index, Marker marker, Layer layer) {
        return removeRangeMarker(index, marker, layer, true);
    }

    /**
     * Removes a marker for a specific dataset/renderer and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index  the dataset/renderer index.
     * @param marker  the marker.
     * @param layer  the layer (foreground or background).
     * @param notify  notify listeners.
     *
     * @return A boolean indicating whether or not the marker was actually
     *         removed.
     *
     * @since 1.0.10
     *
     * @see #addRangeMarker(int, Marker, Layer, boolean)
     */
    public boolean removeRangeMarker(int index, Marker marker, Layer layer,
            boolean notify) {
        if (marker == null) {
            throw new IllegalArgumentException("Null 'marker' argument.");
        }
        ArrayList markers;
        if (layer == Layer.FOREGROUND) {
            markers = (ArrayList) this.foregroundRangeMarkers.get(new Integer(
                    index));
        }
        else {
            markers = (ArrayList) this.backgroundRangeMarkers.get(new Integer(
                    index));
        }
        if (markers == null) {
            return false;
        }
        boolean removed = markers.remove(marker);
        if (removed && notify) {
            fireChangeEvent();
        }
        return removed;
    }

    /**
     * Returns the flag that controls whether or not the domain crosshair is
     * displayed by the plot.
     *
     * @return A boolean.
     *
     * @since 1.0.11
     *
     * @see #setDomainCrosshairVisible(boolean)
     */
    public boolean isDomainCrosshairVisible() {
        return this.domainCrosshairVisible;
    }

    /**
     * Sets the flag that controls whether or not the domain crosshair is
     * displayed by the plot, and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param flag  the new flag value.
     *
     * @since 1.0.11
     *
     * @see #isDomainCrosshairVisible()
     * @see #setRangeCrosshairVisible(boolean)
     */
    public void setDomainCrosshairVisible(boolean flag) {
        if (this.domainCrosshairVisible != flag) {
            this.domainCrosshairVisible = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns the row key for the domain crosshair.
     *
     * @return The row key.
     *
     * @since 1.0.11
     */
    public Comparable getDomainCrosshairRowKey() {
        return this.domainCrosshairRowKey;
    }

    /**
     * Sets the row key for the domain crosshair and sends a
     * {PlotChangeEvent} to all registered listeners.
     *
     * @param key  the key.
     *
     * @since 1.0.11
     */
    public void setDomainCrosshairRowKey(Comparable key) {
        setDomainCrosshairRowKey(key, true);
    }

    /**
     * Sets the row key for the domain crosshair and, if requested, sends a
     * {PlotChangeEvent} to all registered listeners.
     *
     * @param key  the key.
     * @param notify  notify listeners?
     *
     * @since 1.0.11
     */
    public void setDomainCrosshairRowKey(Comparable key, boolean notify) {
        this.domainCrosshairRowKey = key;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the column key for the domain crosshair.
     *
     * @return The column key.
     *
     * @since 1.0.11
     */
    public Comparable getDomainCrosshairColumnKey() {
        return this.domainCrosshairColumnKey;
    }

    /**
     * Sets the column key for the domain crosshair and sends
     * a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param key  the key.
     *
     * @since 1.0.11
     */
    public void setDomainCrosshairColumnKey(Comparable key) {
        setDomainCrosshairColumnKey(key, true);
    }

    /**
     * Sets the column key for the domain crosshair and, if requested, sends
     * a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param key  the key.
     * @param notify  notify listeners?
     *
     * @since 1.0.11
     */
    public void setDomainCrosshairColumnKey(Comparable key, boolean notify) {
        this.domainCrosshairColumnKey = key;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the dataset index for the crosshair.
     *
     * @return The dataset index.
     *
     * @since 1.0.11
     */
    public int getCrosshairDatasetIndex() {
        return this.crosshairDatasetIndex;
    }

    /**
     * Sets the dataset index for the crosshair and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index  the index.
     *
     * @since 1.0.11
     */
    public void setCrosshairDatasetIndex(int index) {
        setCrosshairDatasetIndex(index, true);
    }

    /**
     * Sets the dataset index for the crosshair and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param index  the index.
     * @param notify  notify listeners?
     *
     * @since 1.0.11
     */
    public void setCrosshairDatasetIndex(int index, boolean notify) {
        this.crosshairDatasetIndex = index;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the paint used to draw the domain crosshair.
     *
     * @return The paint (never <code>null).
     *
     * @since 1.0.11
     *
     * @see #setDomainCrosshairPaint(Paint)
     * @see #getDomainCrosshairStroke()
     */
    public Paint getDomainCrosshairPaint() {
        return this.domainCrosshairPaint;
    }

    /**
     * Sets the paint used to draw the domain crosshair.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @since 1.0.11
     *
     * @see #getDomainCrosshairPaint()
     */
    public void setDomainCrosshairPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.domainCrosshairPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the stroke used to draw the domain crosshair.
     *
     * @return The stroke (never <code>null).
     *
     * @since 1.0.11
     *
     * @see #setDomainCrosshairStroke(Stroke)
     * @see #getDomainCrosshairPaint()
     */
    public Stroke getDomainCrosshairStroke() {
        return this.domainCrosshairStroke;
    }

    /**
     * Sets the stroke used to draw the domain crosshair, and sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param stroke  the stroke (<code>null not permitted).
     *
     * @since 1.0.11
     *
     * @see #getDomainCrosshairStroke()
     */
    public void setDomainCrosshairStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.domainCrosshairStroke = stroke;
    }

    /**
     * Returns a flag indicating whether or not the range crosshair is visible.
     *
     * @return The flag.
     *
     * @see #setRangeCrosshairVisible(boolean)
     */
    public boolean isRangeCrosshairVisible() {
        return this.rangeCrosshairVisible;
    }

    /**
     * Sets the flag indicating whether or not the range crosshair is visible.
     *
     * @param flag  the new value of the flag.
     *
     * @see #isRangeCrosshairVisible()
     */
    public void setRangeCrosshairVisible(boolean flag) {
        if (this.rangeCrosshairVisible != flag) {
            this.rangeCrosshairVisible = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns a flag indicating whether or not the crosshair should "lock-on"
     * to actual data values.
     *
     * @return The flag.
     *
     * @see #setRangeCrosshairLockedOnData(boolean)
     */
    public boolean isRangeCrosshairLockedOnData() {
        return this.rangeCrosshairLockedOnData;
    }

    /**
     * Sets the flag indicating whether or not the range crosshair should
     * "lock-on" to actual data values, and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param flag  the flag.
     *
     * @see #isRangeCrosshairLockedOnData()
     */
    public void setRangeCrosshairLockedOnData(boolean flag) {
        if (this.rangeCrosshairLockedOnData != flag) {
            this.rangeCrosshairLockedOnData = flag;
            fireChangeEvent();
        }
    }

    /**
     * Returns the range crosshair value.
     *
     * @return The value.
     *
     * @see #setRangeCrosshairValue(double)
     */
    public double getRangeCrosshairValue() {
        return this.rangeCrosshairValue;
    }

    /**
     * Sets the range crosshair value and, if the crosshair is visible, sends
     * a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param value  the new value.
     *
     * @see #getRangeCrosshairValue()
     */
    public void setRangeCrosshairValue(double value) {
        setRangeCrosshairValue(value, true);
    }

    /**
     * Sets the range crosshair value and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners (but only if the
     * crosshair is visible).
     *
     * @param value  the new value.
     * @param notify  a flag that controls whether or not listeners are
     *                notified.
     *
     * @see #getRangeCrosshairValue()
     */
    public void setRangeCrosshairValue(double value, boolean notify) {
        this.rangeCrosshairValue = value;
        if (isRangeCrosshairVisible() && notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the pen-style (<code>Stroke) used to draw the crosshair
     * (if visible).
     *
     * @return The crosshair stroke (never <code>null).
     *
     * @see #setRangeCrosshairStroke(Stroke)
     * @see #isRangeCrosshairVisible()
     * @see #getRangeCrosshairPaint()
     */
    public Stroke getRangeCrosshairStroke() {
        return this.rangeCrosshairStroke;
    }

    /**
     * Sets the pen-style (<code>Stroke) used to draw the range
     * crosshair (if visible), and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param stroke  the new crosshair stroke (<code>null not
     *         permitted).
     *
     * @see #getRangeCrosshairStroke()
     */
    public void setRangeCrosshairStroke(Stroke stroke) {
        if (stroke == null) {
            throw new IllegalArgumentException("Null 'stroke' argument.");
        }
        this.rangeCrosshairStroke = stroke;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to draw the range crosshair.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRangeCrosshairPaint(Paint)
     * @see #isRangeCrosshairVisible()
     * @see #getRangeCrosshairStroke()
     */
    public Paint getRangeCrosshairPaint() {
        return this.rangeCrosshairPaint;
    }

    /**
     * Sets the paint used to draw the range crosshair (if visible) and
     * sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRangeCrosshairPaint()
     */
    public void setRangeCrosshairPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.rangeCrosshairPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the list of annotations.
     *
     * @return The list of annotations (never <code>null).
     *
     * @see #addAnnotation(CategoryAnnotation)
     * @see #clearAnnotations()
     */
    public List getAnnotations() {
        return this.annotations;
    }

    /**
     * Adds an annotation to the plot and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param annotation  the annotation (<code>null not permitted).
     *
     * @see #removeAnnotation(CategoryAnnotation)
     */
    public void addAnnotation(CategoryAnnotation annotation) {
        addAnnotation(annotation, true);
    }

    /**
     * Adds an annotation to the plot and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param annotation  the annotation (<code>null not permitted).
     * @param notify  notify listeners?
     *
     * @since 1.0.10
     */
    public void addAnnotation(CategoryAnnotation annotation, boolean notify) {
        if (annotation == null) {
            throw new IllegalArgumentException("Null 'annotation' argument.");
        }
        this.annotations.add(annotation);
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Removes an annotation from the plot and sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param annotation  the annotation (<code>null not permitted).
     *
     * @return A boolean (indicates whether or not the annotation was removed).
     *
     * @see #addAnnotation(CategoryAnnotation)
     */
    public boolean removeAnnotation(CategoryAnnotation annotation) {
        return removeAnnotation(annotation, true);
    }

    /**
     * Removes an annotation from the plot and, if requested, sends a
     * {@link PlotChangeEvent} to all registered listeners.
     *
     * @param annotation  the annotation (<code>null not permitted).
     * @param notify  notify listeners?
     *
     * @return A boolean (indicates whether or not the annotation was removed).
     *
     * @since 1.0.10
     */
    public boolean removeAnnotation(CategoryAnnotation annotation,
            boolean notify) {
        if (annotation == null) {
            throw new IllegalArgumentException("Null 'annotation' argument.");
        }
        boolean removed = this.annotations.remove(annotation);
        if (removed && notify) {
            fireChangeEvent();
        }
        return removed;
    }

    /**
     * Clears all the annotations and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     */
    public void clearAnnotations() {
        this.annotations.clear();
        fireChangeEvent();
    }

    /**
     * Calculates the space required for the domain axis/axes.
     *
     * @param g2  the graphics device.
     * @param plotArea  the plot area.
     * @param space  a carrier for the result (<code>null permitted).
     *
     * @return The required space.
     */
    protected AxisSpace calculateDomainAxisSpace(Graphics2D g2,
                                                 Rectangle2D plotArea,
                                                 AxisSpace space) {

        if (space == null) {
            space = new AxisSpace();
        }

        // reserve some space for the domain axis...
        if (this.fixedDomainAxisSpace != null) {
            if (this.orientation == PlotOrientation.HORIZONTAL) {
                space.ensureAtLeast(
                    this.fixedDomainAxisSpace.getLeft(), RectangleEdge.LEFT);
                space.ensureAtLeast(this.fixedDomainAxisSpace.getRight(),
                        RectangleEdge.RIGHT);
            }
            else if (this.orientation == PlotOrientation.VERTICAL) {
                space.ensureAtLeast(this.fixedDomainAxisSpace.getTop(),
                        RectangleEdge.TOP);
                space.ensureAtLeast(this.fixedDomainAxisSpace.getBottom(),
                        RectangleEdge.BOTTOM);
            }
        }
        else {
            // reserve space for the primary domain axis...
            RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(
                    getDomainAxisLocation(), this.orientation);
            if (this.drawSharedDomainAxis) {
                space = getDomainAxis().reserveSpace(g2, this, plotArea,
                        domainEdge, space);
            }

            // reserve space for any domain axes...
            for (int i = 0; i < this.domainAxes.size(); i++) {
                Axis xAxis = (Axis) this.domainAxes.get(i);
                if (xAxis != null) {
                    RectangleEdge edge = getDomainAxisEdge(i);
                    space = xAxis.reserveSpace(g2, this, plotArea, edge, space);
                }
            }
        }

        return space;

    }

    /**
     * Calculates the space required for the range axis/axes.
     *
     * @param g2  the graphics device.
     * @param plotArea  the plot area.
     * @param space  a carrier for the result (<code>null permitted).
     *
     * @return The required space.
     */
    protected AxisSpace calculateRangeAxisSpace(Graphics2D g2,
                                                Rectangle2D plotArea,
                                                AxisSpace space) {

        if (space == null) {
            space = new AxisSpace();
        }

        // reserve some space for the range axis...
        if (this.fixedRangeAxisSpace != null) {
            if (this.orientation == PlotOrientation.HORIZONTAL) {
                space.ensureAtLeast(this.fixedRangeAxisSpace.getTop(),
                        RectangleEdge.TOP);
                space.ensureAtLeast(this.fixedRangeAxisSpace.getBottom(),
                        RectangleEdge.BOTTOM);
            }
            else if (this.orientation == PlotOrientation.VERTICAL) {
                space.ensureAtLeast(this.fixedRangeAxisSpace.getLeft(),
                        RectangleEdge.LEFT);
                space.ensureAtLeast(this.fixedRangeAxisSpace.getRight(),
                        RectangleEdge.RIGHT);
            }
        }
        else {
            // reserve space for the range axes (if any)...
            for (int i = 0; i < this.rangeAxes.size(); i++) {
                Axis yAxis = (Axis) this.rangeAxes.get(i);
                if (yAxis != null) {
                    RectangleEdge edge = getRangeAxisEdge(i);
                    space = yAxis.reserveSpace(g2, this, plotArea, edge, space);
                }
            }
        }
        return space;

    }

    /**
     * Calculates the space required for the axes.
     *
     * @param g2  the graphics device.
     * @param plotArea  the plot area.
     *
     * @return The space required for the axes.
     */
    protected AxisSpace calculateAxisSpace(Graphics2D g2,
                                           Rectangle2D plotArea) {
        AxisSpace space = new AxisSpace();
        space = calculateRangeAxisSpace(g2, plotArea, space);
        space = calculateDomainAxisSpace(g2, plotArea, space);
        return space;
    }

    /**
     * Draws the plot on a Java 2D graphics device (such as the screen or a
     * printer).
     * <P>
     * At your option, you may supply an instance of {@link PlotRenderingInfo}.
     * If you do, it will be populated with information about the drawing,
     * including various plot dimensions and tooltip info.
     *
     * @param g2  the graphics device.
     * @param area  the area within which the plot (including axes) should
     *              be drawn.
     * @param anchor  the anchor point (<code>null permitted).
     * @param parentState  the state from the parent plot, if there is one.
     * @param state  collects info as the chart is drawn (possibly
     *               <code>null).
     */
    public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
            PlotState parentState, PlotRenderingInfo state) {

        // if the plot area is too small, just return...
        boolean b1 = (area.getWidth() <= MINIMUM_WIDTH_TO_DRAW);
        boolean b2 = (area.getHeight() <= MINIMUM_HEIGHT_TO_DRAW);
        if (b1 || b2) {
            return;
        }

        // record the plot area...
        if (state == null) {
            // if the incoming state is null, no information will be passed
            // back to the caller - but we create a temporary state to record
            // the plot area, since that is used later by the axes
            state = new PlotRenderingInfo(null);
        }
        state.setPlotArea(area);

        // adjust the drawing area for the plot insets (if any)...
        RectangleInsets insets = getInsets();
        insets.trim(area);

        // calculate the data area...
        AxisSpace space = calculateAxisSpace(g2, area);
        Rectangle2D dataArea = space.shrink(area, null);
        this.axisOffset.trim(dataArea);

        state.setDataArea(dataArea);
        createAndAddEntity((Rectangle2D) dataArea.clone(), state, null, null);

        // if there is a renderer, it draws the background, otherwise use the
        // default background...
        if (getRenderer() != null) {
            getRenderer().drawBackground(g2, this, dataArea);
        }
        else {
            drawBackground(g2, dataArea);
        }

        Map axisStateMap = drawAxes(g2, area, dataArea, state);

        // the anchor point is typically the point where the mouse last
        // clicked - the crosshairs will be driven off this point...
        if (anchor != null && !dataArea.contains(anchor)) {
            anchor = ShapeUtilities.getPointInRectangle(anchor.getX(),
                    anchor.getY(), dataArea);
        }
        CategoryCrosshairState crosshairState = new CategoryCrosshairState();
        crosshairState.setCrosshairDistance(Double.POSITIVE_INFINITY);
        crosshairState.setAnchor(anchor);

        // specify the anchor X and Y coordinates in Java2D space, for the
        // cases where these are not updated during rendering (i.e. no lock
        // on data)
        crosshairState.setAnchorX(Double.NaN);
        crosshairState.setAnchorY(Double.NaN);
        if (anchor != null) {
            ValueAxis rangeAxis = getRangeAxis();
            if (rangeAxis != null) {
                double y;
                if (getOrientation() == PlotOrientation.VERTICAL) {
                    y = rangeAxis.java2DToValue(anchor.getY(), dataArea,
                            getRangeAxisEdge());
                }
                else {
                    y = rangeAxis.java2DToValue(anchor.getX(), dataArea,
                            getRangeAxisEdge());
                }
                crosshairState.setAnchorY(y);
            }
        }
        crosshairState.setRowKey(getDomainCrosshairRowKey());
        crosshairState.setColumnKey(getDomainCrosshairColumnKey());
        crosshairState.setCrosshairY(getRangeCrosshairValue());

        // don't let anyone draw outside the data area
        Shape savedClip = g2.getClip();
        g2.clip(dataArea);

        drawDomainGridlines(g2, dataArea);

        AxisState rangeAxisState = (AxisState) axisStateMap.get(getRangeAxis());
        if (rangeAxisState == null) {
            if (parentState != null) {
                rangeAxisState = (AxisState) parentState.getSharedAxisStates()
                        .get(getRangeAxis());
            }
        }
        if (rangeAxisState != null) {
            drawRangeGridlines(g2, dataArea, rangeAxisState.getTicks());
            drawZeroRangeBaseline(g2, dataArea);
        }

        // draw the markers...
        for (int i = 0; i < this.renderers.size(); i++) {
            drawDomainMarkers(g2, dataArea, i, Layer.BACKGROUND);
        }
        for (int i = 0; i < this.renderers.size(); i++) {
            drawRangeMarkers(g2, dataArea, i, Layer.BACKGROUND);
        }

        // now render data items...
        boolean foundData = false;

        // set up the alpha-transparency...
        Composite originalComposite = g2.getComposite();
        g2.setComposite(AlphaComposite.getInstance(
                AlphaComposite.SRC_OVER, getForegroundAlpha()));

        DatasetRenderingOrder order = getDatasetRenderingOrder();
        if (order == DatasetRenderingOrder.FORWARD) {
            for (int i = 0; i < this.datasets.size(); i++) {
                foundData = render(g2, dataArea, i, state, crosshairState)
                    || foundData;
            }
        }
        else {  // DatasetRenderingOrder.REVERSE
            for (int i = this.datasets.size() - 1; i >= 0; i--) {
                foundData = render(g2, dataArea, i, state, crosshairState)
                    || foundData;
            }
        }
        // draw the foreground markers...
        for (int i = 0; i < this.renderers.size(); i++) {
            drawDomainMarkers(g2, dataArea, i, Layer.FOREGROUND);
        }
        for (int i = 0; i < this.renderers.size(); i++) {
            drawRangeMarkers(g2, dataArea, i, Layer.FOREGROUND);
        }

        // draw the annotations (if any)...
        drawAnnotations(g2, dataArea);

        g2.setClip(savedClip);
        g2.setComposite(originalComposite);

        if (!foundData) {
            drawNoDataMessage(g2, dataArea);
        }

        int datasetIndex = crosshairState.getDatasetIndex();
        setCrosshairDatasetIndex(datasetIndex, false);

        // draw domain crosshair if required...
        Comparable rowKey = crosshairState.getRowKey();
        Comparable columnKey = crosshairState.getColumnKey();
        setDomainCrosshairRowKey(rowKey, false);
        setDomainCrosshairColumnKey(columnKey, false);
        if (isDomainCrosshairVisible() && columnKey != null) {
            Paint paint = getDomainCrosshairPaint();
            Stroke stroke = getDomainCrosshairStroke();
            drawDomainCrosshair(g2, dataArea, this.orientation,
                    datasetIndex, rowKey, columnKey, stroke, paint);
        }

        // draw range crosshair if required...
        ValueAxis yAxis = getRangeAxisForDataset(datasetIndex);
        RectangleEdge yAxisEdge = getRangeAxisEdge();
        if (!this.rangeCrosshairLockedOnData && anchor != null) {
            double yy;
            if (getOrientation() == PlotOrientation.VERTICAL) {
                yy = yAxis.java2DToValue(anchor.getY(), dataArea, yAxisEdge);
            }
            else {
                yy = yAxis.java2DToValue(anchor.getX(), dataArea, yAxisEdge);
            }
            crosshairState.setCrosshairY(yy);
        }
        setRangeCrosshairValue(crosshairState.getCrosshairY(), false);
        if (isRangeCrosshairVisible()) {
            double y = getRangeCrosshairValue();
            Paint paint = getRangeCrosshairPaint();
            Stroke stroke = getRangeCrosshairStroke();
            drawRangeCrosshair(g2, dataArea, getOrientation(), y, yAxis,
                    stroke, paint);
        }

        // draw an outline around the plot area...
        if (isOutlineVisible()) {
            if (getRenderer() != null) {
                getRenderer().drawOutline(g2, this, dataArea);
            }
            else {
                drawOutline(g2, dataArea);
            }
        }

    }

    /**
     * Draws the plot background (the background color and/or image).
     * <P>
     * This method will be called during the chart drawing process and is
     * declared public so that it can be accessed by the renderers used by
     * certain subclasses.  You shouldn't need to call this method directly.
     *
     * @param g2  the graphics device.
     * @param area  the area within which the plot should be drawn.
     */
    public void drawBackground(Graphics2D g2, Rectangle2D area) {
        fillBackground(g2, area, this.orientation);
        drawBackgroundImage(g2, area);
    }

    /**
     * A utility method for drawing the plot's axes.
     *
     * @param g2  the graphics device.
     * @param plotArea  the plot area.
     * @param dataArea  the data area.
     * @param plotState  collects information about the plot (<code>null
     *                   permitted).
     *
     * @return A map containing the axis states.
     */
    protected Map drawAxes(Graphics2D g2,
                           Rectangle2D plotArea,
                           Rectangle2D dataArea,
                           PlotRenderingInfo plotState) {

        AxisCollection axisCollection = new AxisCollection();

        // add domain axes to lists...
        for (int index = 0; index < this.domainAxes.size(); index++) {
            CategoryAxis xAxis = (CategoryAxis) this.domainAxes.get(index);
            if (xAxis != null) {
                axisCollection.add(xAxis, getDomainAxisEdge(index));
            }
        }

        // add range axes to lists...
        for (int index = 0; index < this.rangeAxes.size(); index++) {
            ValueAxis yAxis = (ValueAxis) this.rangeAxes.get(index);
            if (yAxis != null) {
                axisCollection.add(yAxis, getRangeAxisEdge(index));
            }
        }

        Map axisStateMap = new HashMap();

        // draw the top axes
        double cursor = dataArea.getMinY() - this.axisOffset.calculateTopOutset(
                dataArea.getHeight());
        Iterator iterator = axisCollection.getAxesAtTop().iterator();
        while (iterator.hasNext()) {
            Axis axis = (Axis) iterator.next();
            if (axis != null) {
                AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                        RectangleEdge.TOP, plotState);
                cursor = axisState.getCursor();
                axisStateMap.put(axis, axisState);
            }
        }

        // draw the bottom axes
        cursor = dataArea.getMaxY()
                 + this.axisOffset.calculateBottomOutset(dataArea.getHeight());
        iterator = axisCollection.getAxesAtBottom().iterator();
        while (iterator.hasNext()) {
            Axis axis = (Axis) iterator.next();
            if (axis != null) {
                AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                        RectangleEdge.BOTTOM, plotState);
                cursor = axisState.getCursor();
                axisStateMap.put(axis, axisState);
            }
        }

        // draw the left axes
        cursor = dataArea.getMinX()
                 - this.axisOffset.calculateLeftOutset(dataArea.getWidth());
        iterator = axisCollection.getAxesAtLeft().iterator();
        while (iterator.hasNext()) {
            Axis axis = (Axis) iterator.next();
            if (axis != null) {
                AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                        RectangleEdge.LEFT, plotState);
                cursor = axisState.getCursor();
                axisStateMap.put(axis, axisState);
            }
        }

        // draw the right axes
        cursor = dataArea.getMaxX()
                 + this.axisOffset.calculateRightOutset(dataArea.getWidth());
        iterator = axisCollection.getAxesAtRight().iterator();
        while (iterator.hasNext()) {
            Axis axis = (Axis) iterator.next();
            if (axis != null) {
                AxisState axisState = axis.draw(g2, cursor, plotArea, dataArea,
                        RectangleEdge.RIGHT, plotState);
                cursor = axisState.getCursor();
                axisStateMap.put(axis, axisState);
            }
        }

        return axisStateMap;

    }

    /**
     * Draws a representation of a dataset within the dataArea region using the
     * appropriate renderer.
     *
     * @param g2  the graphics device.
     * @param dataArea  the region in which the data is to be drawn.
     * @param index  the dataset and renderer index.
     * @param info  an optional object for collection dimension information.
     * @param crosshairState  a state object for tracking crosshair info
     *        (<code>null permitted).
     *
     * @return A boolean that indicates whether or not real data was found.
     *
     * @since 1.0.11
     */
    public boolean render(Graphics2D g2, Rectangle2D dataArea, int index,
            PlotRenderingInfo info, CategoryCrosshairState crosshairState) {

        boolean foundData = false;
        CategoryDataset currentDataset = getDataset(index);
        CategoryItemRenderer renderer = getRenderer(index);
        CategoryAxis domainAxis = getDomainAxisForDataset(index);
        ValueAxis rangeAxis = getRangeAxisForDataset(index);
        boolean hasData = !DatasetUtilities.isEmptyOrNull(currentDataset);
        if (hasData && renderer != null) {

            foundData = true;
            CategoryItemRendererState state = renderer.initialise(g2, dataArea,
                    this, index, info);
            state.setCrosshairState(crosshairState);
            int columnCount = currentDataset.getColumnCount();
            int rowCount = currentDataset.getRowCount();
            int passCount = renderer.getPassCount();
            for (int pass = 0; pass < passCount; pass++) {
                if (this.columnRenderingOrder == SortOrder.ASCENDING) {
                    for (int column = 0; column < columnCount; column++) {
                        if (this.rowRenderingOrder == SortOrder.ASCENDING) {
                            for (int row = 0; row < rowCount; row++) {
                                renderer.drawItem(g2, state, dataArea, this,
                                        domainAxis, rangeAxis, currentDataset,
                                        row, column, pass);
                            }
                        }
                        else {
                            for (int row = rowCount - 1; row >= 0; row--) {
                                renderer.drawItem(g2, state, dataArea, this,
                                        domainAxis, rangeAxis, currentDataset,
                                        row, column, pass);
                            }
                        }
                    }
                }
                else {
                    for (int column = columnCount - 1; column >= 0; column--) {
                        if (this.rowRenderingOrder == SortOrder.ASCENDING) {
                            for (int row = 0; row < rowCount; row++) {
                                renderer.drawItem(g2, state, dataArea, this,
                                        domainAxis, rangeAxis, currentDataset,
                                        row, column, pass);
                            }
                        }
                        else {
                            for (int row = rowCount - 1; row >= 0; row--) {
                                renderer.drawItem(g2, state, dataArea, this,
                                        domainAxis, rangeAxis, currentDataset,
                                        row, column, pass);
                            }
                        }
                    }
                }
            }
        }
        return foundData;

    }

    /**
     * Draws the domain gridlines for the plot, if they are visible.
     *
     * @param g2  the graphics device.
     * @param dataArea  the area inside the axes.
     *
     * @see #drawRangeGridlines(Graphics2D, Rectangle2D, List)
     */
    protected void drawDomainGridlines(Graphics2D g2, Rectangle2D dataArea) {

        if (!isDomainGridlinesVisible()) {
            return;
        }
        CategoryAnchor anchor = getDomainGridlinePosition();
        RectangleEdge domainAxisEdge = getDomainAxisEdge();
        CategoryDataset dataset = getDataset();
        if (dataset == null) {
            return;
        }
        CategoryAxis axis = getDomainAxis();
        if (axis != null) {
            int columnCount = dataset.getColumnCount();
            for (int c = 0; c < columnCount; c++) {
                double xx = axis.getCategoryJava2DCoordinate(anchor, c,
                        columnCount, dataArea, domainAxisEdge);
                CategoryItemRenderer renderer1 = getRenderer();
                if (renderer1 != null) {
                    renderer1.drawDomainGridline(g2, this, dataArea, xx);
                }
            }
        }
    }

    /**
     * Draws the range gridlines for the plot, if they are visible.
     *
     * @param g2  the graphics device.
     * @param dataArea  the area inside the axes.
     * @param ticks  the ticks.
     *
     * @see #drawDomainGridlines(Graphics2D, Rectangle2D)
     */
    protected void drawRangeGridlines(Graphics2D g2, Rectangle2D dataArea,
                                      List ticks) {
        // draw the range grid lines, if any...
        if (!isRangeGridlinesVisible() && !isRangeMinorGridlinesVisible()) {
            return;
        }
        // no axis, no gridlines...
        ValueAxis axis = getRangeAxis();
        if (axis == null) {
            return;
        }
        // no renderer, no gridlines...
        CategoryItemRenderer r = getRenderer();
        if (r == null) {
            return;
        }

        Stroke gridStroke = null;
        Paint gridPaint = null;
        boolean paintLine = false;
        Iterator iterator = ticks.iterator();
        while (iterator.hasNext()) {
            paintLine = false;
            ValueTick tick = (ValueTick) iterator.next();
            if ((tick.getTickType() == TickType.MINOR)
                    && isRangeMinorGridlinesVisible()) {
                gridStroke = getRangeMinorGridlineStroke();
                gridPaint = getRangeMinorGridlinePaint();
                paintLine = true;
            }
            else if ((tick.getTickType() == TickType.MAJOR)
                    && isRangeGridlinesVisible()) {
                gridStroke = getRangeGridlineStroke();
                gridPaint = getRangeGridlinePaint();
                paintLine = true;
            }
            if (((tick.getValue() != 0.0)
                    || !isRangeZeroBaselineVisible()) && paintLine) {
                // the method we want isn't in the CategoryItemRenderer
                // interface...
                if (r instanceof AbstractCategoryItemRenderer) {
                    AbstractCategoryItemRenderer aci
                            = (AbstractCategoryItemRenderer) r;
                    aci.drawRangeLine(g2, this, axis, dataArea,
                            tick.getValue(), gridPaint, gridStroke);
                }
                else {
                    // we'll have to use the method in the interface, but
                    // this doesn't have the paint and stroke settings...
                    r.drawRangeGridline(g2, this, axis, dataArea,
                            tick.getValue());
                }
            }
        }
    }

    /**
     * Draws a base line across the chart at value zero on the range axis.
     *
     * @param g2  the graphics device.
     * @param area  the data area.
     *
     * @see #setRangeZeroBaselineVisible(boolean)
     *
     * @since 1.0.13
     */
    protected void drawZeroRangeBaseline(Graphics2D g2, Rectangle2D area) {
        if (!isRangeZeroBaselineVisible()) {
            return;
        }
        CategoryItemRenderer r = getRenderer();
        if (r instanceof AbstractCategoryItemRenderer) {
            AbstractCategoryItemRenderer aci = (AbstractCategoryItemRenderer) r;
            aci.drawRangeLine(g2, this, getRangeAxis(), area, 0.0,
                    this.rangeZeroBaselinePaint, this.rangeZeroBaselineStroke);
        }
        else {
            r.drawRangeGridline(g2, this, getRangeAxis(), area, 0.0);
        }
    }

    /**
     * Draws the annotations.
     *
     * @param g2  the graphics device.
     * @param dataArea  the data area.
     */
    protected void drawAnnotations(Graphics2D g2, Rectangle2D dataArea) {

        if (getAnnotations() != null) {
            Iterator iterator = getAnnotations().iterator();
            while (iterator.hasNext()) {
                CategoryAnnotation annotation
                        = (CategoryAnnotation) iterator.next();
                annotation.draw(g2, this, dataArea, getDomainAxis(),
                        getRangeAxis());
            }
        }

    }

    /**
     * Draws the domain markers (if any) for an axis and layer.  This method is
     * typically called from within the draw() method.
     *
     * @param g2  the graphics device.
     * @param dataArea  the data area.
     * @param index  the renderer index.
     * @param layer  the layer (foreground or background).
     *
     * @see #drawRangeMarkers(Graphics2D, Rectangle2D, int, Layer)
     */
    protected void drawDomainMarkers(Graphics2D g2, Rectangle2D dataArea,
                                     int index, Layer layer) {

        CategoryItemRenderer r = getRenderer(index);
        if (r == null) {
            return;
        }

        Collection markers = getDomainMarkers(index, layer);
        CategoryAxis axis = getDomainAxisForDataset(index);
        if (markers != null && axis != null) {
            Iterator iterator = markers.iterator();
            while (iterator.hasNext()) {
                CategoryMarker marker = (CategoryMarker) iterator.next();
                r.drawDomainMarker(g2, this, axis, marker, dataArea);
            }
        }

    }

    /**
     * Draws the range markers (if any) for an axis and layer.  This method is
     * typically called from within the draw() method.
     *
     * @param g2  the graphics device.
     * @param dataArea  the data area.
     * @param index  the renderer index.
     * @param layer  the layer (foreground or background).
     *
     * @see #drawDomainMarkers(Graphics2D, Rectangle2D, int, Layer)
     */
    protected void drawRangeMarkers(Graphics2D g2, Rectangle2D dataArea,
                                    int index, Layer layer) {

        CategoryItemRenderer r = getRenderer(index);
        if (r == null) {
            return;
        }

        Collection markers = getRangeMarkers(index, layer);
        ValueAxis axis = getRangeAxisForDataset(index);
        if (markers != null && axis != null) {
            Iterator iterator = markers.iterator();
            while (iterator.hasNext()) {
                Marker marker = (Marker) iterator.next();
                r.drawRangeMarker(g2, this, axis, marker, dataArea);
            }
        }

    }

    /**
     * Utility method for drawing a line perpendicular to the range axis (used
     * for crosshairs).
     *
     * @param g2  the graphics device.
     * @param dataArea  the area defined by the axes.
     * @param value  the data value.
     * @param stroke  the line stroke (<code>null not permitted).
     * @param paint  the line paint (<code>null not permitted).
     */
    protected void drawRangeLine(Graphics2D g2, Rectangle2D dataArea,
            double value, Stroke stroke, Paint paint) {

        double java2D = getRangeAxis().valueToJava2D(value, dataArea,
                getRangeAxisEdge());
        Line2D line = null;
        if (this.orientation == PlotOrientation.HORIZONTAL) {
            line = new Line2D.Double(java2D, dataArea.getMinY(), java2D,
                    dataArea.getMaxY());
        }
        else if (this.orientation == PlotOrientation.VERTICAL) {
            line = new Line2D.Double(dataArea.getMinX(), java2D,
                    dataArea.getMaxX(), java2D);
        }
        g2.setStroke(stroke);
        g2.setPaint(paint);
        g2.draw(line);

    }

    /**
     * Draws a domain crosshair.
     *
     * @param g2  the graphics target.
     * @param dataArea  the data area.
     * @param orientation  the plot orientation.
     * @param datasetIndex  the dataset index.
     * @param rowKey  the row key.
     * @param columnKey  the column key.
     * @param stroke  the stroke used to draw the crosshair line.
     * @param paint  the paint used to draw the crosshair line.
     *
     * @see #drawRangeCrosshair(Graphics2D, Rectangle2D, PlotOrientation,
     *     double, ValueAxis, Stroke, Paint)
     *
     * @since 1.0.11
     */
    protected void drawDomainCrosshair(Graphics2D g2, Rectangle2D dataArea,
            PlotOrientation orientation, int datasetIndex,
            Comparable rowKey, Comparable columnKey, Stroke stroke,
            Paint paint) {

        CategoryDataset dataset = getDataset(datasetIndex);
        CategoryAxis axis = getDomainAxisForDataset(datasetIndex);
        CategoryItemRenderer renderer = getRenderer(datasetIndex);
        Line2D line = null;
        if (orientation == PlotOrientation.VERTICAL) {
            double xx = renderer.getItemMiddle(rowKey, columnKey, dataset, axis,
                    dataArea, RectangleEdge.BOTTOM);
            line = new Line2D.Double(xx, dataArea.getMinY(), xx,
                    dataArea.getMaxY());
        }
        else {
            double yy = renderer.getItemMiddle(rowKey, columnKey, dataset, axis,
                    dataArea, RectangleEdge.LEFT);
            line = new Line2D.Double(dataArea.getMinX(), yy,
                    dataArea.getMaxX(), yy);
        }
        g2.setStroke(stroke);
        g2.setPaint(paint);
        g2.draw(line);

    }

    /**
     * Draws a range crosshair.
     *
     * @param g2  the graphics target.
     * @param dataArea  the data area.
     * @param orientation  the plot orientation.
     * @param value  the crosshair value.
     * @param axis  the axis against which the value is measured.
     * @param stroke  the stroke used to draw the crosshair line.
     * @param paint  the paint used to draw the crosshair line.
     *
     * @see #drawDomainCrosshair(Graphics2D, Rectangle2D, PlotOrientation, int,
     *      Comparable, Comparable, Stroke, Paint)
     *
     * @since 1.0.5
     */
    protected void drawRangeCrosshair(Graphics2D g2, Rectangle2D dataArea,
            PlotOrientation orientation, double value, ValueAxis axis,
            Stroke stroke, Paint paint) {

        if (!axis.getRange().contains(value)) {
            return;
        }
        Line2D line = null;
        if (orientation == PlotOrientation.HORIZONTAL) {
            double xx = axis.valueToJava2D(value, dataArea,
                    RectangleEdge.BOTTOM);
            line = new Line2D.Double(xx, dataArea.getMinY(), xx,
                    dataArea.getMaxY());
        }
        else {
            double yy = axis.valueToJava2D(value, dataArea,
                    RectangleEdge.LEFT);
            line = new Line2D.Double(dataArea.getMinX(), yy,
                    dataArea.getMaxX(), yy);
        }
        g2.setStroke(stroke);
        g2.setPaint(paint);
        g2.draw(line);

    }

    /**
     * Returns the range of data values that will be plotted against the range
     * axis.  If the dataset is <code>null, this method returns
     * <code>null.
     *
     * @param axis  the axis.
     *
     * @return The data range.
     */
    public Range getDataRange(ValueAxis axis) {

        Range result = null;
        List mappedDatasets = new ArrayList();

        int rangeIndex = this.rangeAxes.indexOf(axis);
        if (rangeIndex >= 0) {
            mappedDatasets.addAll(datasetsMappedToRangeAxis(rangeIndex));
        }
        else if (axis == getRangeAxis()) {
            mappedDatasets.addAll(datasetsMappedToRangeAxis(0));
        }

        // iterate through the datasets that map to the axis and get the union
        // of the ranges.
        Iterator iterator = mappedDatasets.iterator();
        while (iterator.hasNext()) {
            CategoryDataset d = (CategoryDataset) iterator.next();
            CategoryItemRenderer r = getRendererForDataset(d);
            if (r != null) {
                result = Range.combine(result, r.findRangeBounds(d));
            }
        }
        return result;

    }

    /**
     * Returns a list of the datasets that are mapped to the axis with the
     * specified index.
     *
     * @param axisIndex  the axis index.
     *
     * @return The list (possibly empty, but never <code>null).
     *
     * @since 1.0.3
     */
    private List datasetsMappedToDomainAxis(int axisIndex) {
        Integer key = new Integer(axisIndex);
        List result = new ArrayList();
        for (int i = 0; i < this.datasets.size(); i++) {
            List mappedAxes = (List) this.datasetToDomainAxesMap.get(
                    new Integer(i));
            CategoryDataset dataset = (CategoryDataset) this.datasets.get(i);
            if (mappedAxes == null) {
                if (key.equals(ZERO)) {
                    if (dataset != null) {
                        result.add(dataset);
                    }
                }
            }
            else {
                if (mappedAxes.contains(key)) {
                    if (dataset != null) {
                        result.add(dataset);
                    }
                }
            }
        }
        return result;
    }

    /**
     * A utility method that returns a list of datasets that are mapped to a
     * given range axis.
     *
     * @param index  the axis index.
     *
     * @return A list of datasets.
     */
    private List datasetsMappedToRangeAxis(int index) {
        Integer key = new Integer(index);
        List result = new ArrayList();
        for (int i = 0; i < this.datasets.size(); i++) {
            List mappedAxes = (List) this.datasetToRangeAxesMap.get(
                    new Integer(i));
            if (mappedAxes == null) {
                if (key.equals(ZERO)) {
                    result.add(this.datasets.get(i));
                }
            }
            else {
                if (mappedAxes.contains(key)) {
                    result.add(this.datasets.get(i));
                }
            }
        }
        return result;
    }

    /**
     * Returns the weight for this plot when it is used as a subplot within a
     * combined plot.
     *
     * @return The weight.
     *
     * @see #setWeight(int)
     */
    public int getWeight() {
        return this.weight;
    }

    /**
     * Sets the weight for the plot and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param weight  the weight.
     *
     * @see #getWeight()
     */
    public void setWeight(int weight) {
        this.weight = weight;
        fireChangeEvent();
    }

    /**
     * Returns the fixed domain axis space.
     *
     * @return The fixed domain axis space (possibly <code>null).
     *
     * @see #setFixedDomainAxisSpace(AxisSpace)
     */
    public AxisSpace getFixedDomainAxisSpace() {
        return this.fixedDomainAxisSpace;
    }

    /**
     * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null permitted).
     *
     * @see #getFixedDomainAxisSpace()
     */
    public void setFixedDomainAxisSpace(AxisSpace space) {
        setFixedDomainAxisSpace(space, true);
    }

    /**
     * Sets the fixed domain axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null permitted).
     * @param notify  notify listeners?
     *
     * @see #getFixedDomainAxisSpace()
     *
     * @since 1.0.7
     */
    public void setFixedDomainAxisSpace(AxisSpace space, boolean notify) {
        this.fixedDomainAxisSpace = space;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns the fixed range axis space.
     *
     * @return The fixed range axis space (possibly <code>null).
     *
     * @see #setFixedRangeAxisSpace(AxisSpace)
     */
    public AxisSpace getFixedRangeAxisSpace() {
        return this.fixedRangeAxisSpace;
    }

    /**
     * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null permitted).
     *
     * @see #getFixedRangeAxisSpace()
     */
    public void setFixedRangeAxisSpace(AxisSpace space) {
        setFixedRangeAxisSpace(space, true);
    }

    /**
     * Sets the fixed range axis space and sends a {@link PlotChangeEvent} to
     * all registered listeners.
     *
     * @param space  the space (<code>null permitted).
     * @param notify  notify listeners?
     *
     * @see #getFixedRangeAxisSpace()
     *
     * @since 1.0.7
     */
    public void setFixedRangeAxisSpace(AxisSpace space, boolean notify) {
        this.fixedRangeAxisSpace = space;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Returns a list of the categories in the plot's primary dataset.
     *
     * @return A list of the categories in the plot's primary dataset.
     *
     * @see #getCategoriesForAxis(CategoryAxis)
     */
    public List getCategories() {
        List result = null;
        if (getDataset() != null) {
            result = Collections.unmodifiableList(getDataset().getColumnKeys());
        }
        return result;
    }

    /**
     * Returns a list of the categories that should be displayed for the
     * specified axis.
     *
     * @param axis  the axis (<code>null not permitted)
     *
     * @return The categories.
     *
     * @since 1.0.3
     */
    public List getCategoriesForAxis(CategoryAxis axis) {
        List result = new ArrayList();
        int axisIndex = this.domainAxes.indexOf(axis);
        List datasets = datasetsMappedToDomainAxis(axisIndex);
        Iterator iterator = datasets.iterator();
        while (iterator.hasNext()) {
            CategoryDataset dataset = (CategoryDataset) iterator.next();
            // add the unique categories from this dataset
            for (int i = 0; i < dataset.getColumnCount(); i++) {
                Comparable category = dataset.getColumnKey(i);
                if (!result.contains(category)) {
                    result.add(category);
                }
            }
        }
        return result;
    }

    /**
     * Returns the flag that controls whether or not the shared domain axis is
     * drawn for each subplot.
     *
     * @return A boolean.
     *
     * @see #setDrawSharedDomainAxis(boolean)
     */
    public boolean getDrawSharedDomainAxis() {
        return this.drawSharedDomainAxis;
    }

    /**
     * Sets the flag that controls whether the shared domain axis is drawn when
     * this plot is being used as a subplot.
     *
     * @param draw  a boolean.
     *
     * @see #getDrawSharedDomainAxis()
     */
    public void setDrawSharedDomainAxis(boolean draw) {
        this.drawSharedDomainAxis = draw;
        fireChangeEvent();
    }

    /**
     * Returns <code>false always, because the plot cannot be panned
     * along the domain axis/axes.
     *
     * @return A boolean.
     *
     * @since 1.0.13
     */
    public boolean isDomainPannable() {
        return false;
    }

    /**
     * Returns <code>true if panning is enabled for the range axes,
     * and <code>false otherwise.
     *
     * @return A boolean.
     *
     * @since 1.0.13
     */
    public boolean isRangePannable() {
        return this.rangePannable;
    }

    /**
     * Sets the flag that enables or disables panning of the plot along
     * the range axes.
     *
     * @param pannable  the new flag value.
     *
     * @since 1.0.13
     */
    public void setRangePannable(boolean pannable) {
        this.rangePannable = pannable;
    }

    /**
     * Pans the domain axes by the specified percentage.
     *
     * @param percent  the distance to pan (as a percentage of the axis length).
     * @param info the plot info
     * @param source the source point where the pan action started.
     *
     * @since 1.0.13
     */
    public void panDomainAxes(double percent, PlotRenderingInfo info,
            Point2D source) {
        // do nothing, because the plot is not pannable along the domain axes
    }

    /**
     * Pans the range axes by the specified percentage.
     *
     * @param percent  the distance to pan (as a percentage of the axis length).
     * @param info the plot info
     * @param source the source point where the pan action started.
     *
     * @since 1.0.13
     */
    public void panRangeAxes(double percent, PlotRenderingInfo info,
            Point2D source) {
        if (!isRangePannable()) {
            return;
        }
        int rangeAxisCount = getRangeAxisCount();
        for (int i = 0; i < rangeAxisCount; i++) {
            ValueAxis axis = getRangeAxis(i);
            if (axis == null) {
                continue;
            }
            double length = axis.getRange().getLength();
            double adj = percent * length;
            if (axis.isInverted()) {
                adj = -adj;
            }
            axis.setRange(axis.getLowerBound() + adj,
                    axis.getUpperBound() + adj);
        }
    }

    /**
     * Returns <code>false to indicate that the domain axes are not
     * zoomable.
     *
     * @return A boolean.
     *
     * @see #isRangeZoomable()
     */
    public boolean isDomainZoomable() {
        return false;
    }

    /**
     * Returns <code>true to indicate that the range axes are zoomable.
     *
     * @return A boolean.
     *
     * @see #isDomainZoomable()
     */
    public boolean isRangeZoomable() {
        return true;
    }

    /**
     * This method does nothing, because <code>CategoryPlot doesn't
     * support zooming on the domain.
     *
     * @param factor  the zoom factor.
     * @param state  the plot state.
     * @param source  the source point (in Java2D space) for the zoom.
     */
    public void zoomDomainAxes(double factor, PlotRenderingInfo state,
                               Point2D source) {
        // can't zoom domain axis
    }

    /**
     * This method does nothing, because <code>CategoryPlot doesn't
     * support zooming on the domain.
     *
     * @param lowerPercent  the lower bound.
     * @param upperPercent  the upper bound.
     * @param state  the plot state.
     * @param source  the source point (in Java2D space) for the zoom.
     */
    public void zoomDomainAxes(double lowerPercent, double upperPercent,
                               PlotRenderingInfo state, Point2D source) {
        // can't zoom domain axis
    }

    /**
     * This method does nothing, because <code>CategoryPlot doesn't
     * support zooming on the domain.
     *
     * @param factor  the zoom factor.
     * @param info  the plot rendering info.
     * @param source  the source point (in Java2D space).
     * @param useAnchor  use source point as zoom anchor?
     *
     * @see #zoomRangeAxes(double, PlotRenderingInfo, Point2D, boolean)
     *
     * @since 1.0.7
     */
    public void zoomDomainAxes(double factor, PlotRenderingInfo info,
                               Point2D source, boolean useAnchor) {
        // can't zoom domain axis
    }

    /**
     * Multiplies the range on the range axis/axes by the specified factor.
     *
     * @param factor  the zoom factor.
     * @param state  the plot state.
     * @param source  the source point (in Java2D space) for the zoom.
     */
    public void zoomRangeAxes(double factor, PlotRenderingInfo state,
                              Point2D source) {
        // delegate to other method
        zoomRangeAxes(factor, state, source, false);
    }

    /**
     * Multiplies the range on the range axis/axes by the specified factor.
     *
     * @param factor  the zoom factor.
     * @param info  the plot rendering info.
     * @param source  the source point.
     * @param useAnchor  a flag that controls whether or not the source point
     *         is used for the zoom anchor.
     *
     * @see #zoomDomainAxes(double, PlotRenderingInfo, Point2D, boolean)
     *
     * @since 1.0.7
     */
    public void zoomRangeAxes(double factor, PlotRenderingInfo info,
                              Point2D source, boolean useAnchor) {

        // perform the zoom on each range axis
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis rangeAxis = (ValueAxis) this.rangeAxes.get(i);
            if (rangeAxis != null) {
                if (useAnchor) {
                    // get the relevant source coordinate given the plot
                    // orientation
                    double sourceY = source.getY();
                    if (this.orientation == PlotOrientation.HORIZONTAL) {
                        sourceY = source.getX();
                    }
                    double anchorY = rangeAxis.java2DToValue(sourceY,
                            info.getDataArea(), getRangeAxisEdge());
                    rangeAxis.resizeRange2(factor, anchorY);
                }
                else {
                    rangeAxis.resizeRange(factor);
                }
            }
        }
    }

    /**
     * Zooms in on the range axes.
     *
     * @param lowerPercent  the lower bound.
     * @param upperPercent  the upper bound.
     * @param state  the plot state.
     * @param source  the source point (in Java2D space) for the zoom.
     */
    public void zoomRangeAxes(double lowerPercent, double upperPercent,
                              PlotRenderingInfo state, Point2D source) {
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis rangeAxis = (ValueAxis) this.rangeAxes.get(i);
            if (rangeAxis != null) {
                rangeAxis.zoomRange(lowerPercent, upperPercent);
            }
        }
    }

    /**
     * Returns the anchor value.
     *
     * @return The anchor value.
     *
     * @see #setAnchorValue(double)
     */
    public double getAnchorValue() {
        return this.anchorValue;
    }

    /**
     * Sets the anchor value and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param value  the anchor value.
     *
     * @see #getAnchorValue()
     */
    public void setAnchorValue(double value) {
        setAnchorValue(value, true);
    }

    /**
     * Sets the anchor value and, if requested, sends a {@link PlotChangeEvent}
     * to all registered listeners.
     *
     * @param value  the value.
     * @param notify  notify listeners?
     *
     * @see #getAnchorValue()
     */
    public void setAnchorValue(double value, boolean notify) {
        this.anchorValue = value;
        if (notify) {
            fireChangeEvent();
        }
    }

    /**
     * Tests the plot for equality with an arbitrary object.
     *
     * @param obj  the object to test against (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {

        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CategoryPlot)) {
            return false;
        }
        CategoryPlot that = (CategoryPlot) obj;
        if (this.orientation != that.orientation) {
            return false;
        }
        if (!ObjectUtilities.equal(this.axisOffset, that.axisOffset)) {
            return false;
        }
        if (!this.domainAxes.equals(that.domainAxes)) {
            return false;
        }
        if (!this.domainAxisLocations.equals(that.domainAxisLocations)) {
            return false;
        }
        if (this.drawSharedDomainAxis != that.drawSharedDomainAxis) {
            return false;
        }
        if (!this.rangeAxes.equals(that.rangeAxes)) {
            return false;
        }
        if (!this.rangeAxisLocations.equals(that.rangeAxisLocations)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.datasetToDomainAxesMap,
                that.datasetToDomainAxesMap)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.datasetToRangeAxesMap,
                that.datasetToRangeAxesMap)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.renderers, that.renderers)) {
            return false;
        }
        if (this.renderingOrder != that.renderingOrder) {
            return false;
        }
        if (this.columnRenderingOrder != that.columnRenderingOrder) {
            return false;
        }
        if (this.rowRenderingOrder != that.rowRenderingOrder) {
            return false;
        }
        if (this.domainGridlinesVisible != that.domainGridlinesVisible) {
            return false;
        }
        if (this.domainGridlinePosition != that.domainGridlinePosition) {
            return false;
        }
        if (!ObjectUtilities.equal(this.domainGridlineStroke,
                that.domainGridlineStroke)) {
            return false;
        }
        if (!PaintUtilities.equal(this.domainGridlinePaint,
                that.domainGridlinePaint)) {
            return false;
        }
        if (this.rangeGridlinesVisible != that.rangeGridlinesVisible) {
            return false;
        }
        if (!ObjectUtilities.equal(this.rangeGridlineStroke,
                that.rangeGridlineStroke)) {
            return false;
        }
        if (!PaintUtilities.equal(this.rangeGridlinePaint,
                that.rangeGridlinePaint)) {
            return false;
        }
        if (this.anchorValue != that.anchorValue) {
            return false;
        }
        if (this.rangeCrosshairVisible != that.rangeCrosshairVisible) {
            return false;
        }
        if (this.rangeCrosshairValue != that.rangeCrosshairValue) {
            return false;
        }
        if (!ObjectUtilities.equal(this.rangeCrosshairStroke,
                that.rangeCrosshairStroke)) {
            return false;
        }
        if (!PaintUtilities.equal(this.rangeCrosshairPaint,
                that.rangeCrosshairPaint)) {
            return false;
        }
        if (this.rangeCrosshairLockedOnData
                != that.rangeCrosshairLockedOnData) {
            return false;
        }
        if (!ObjectUtilities.equal(this.foregroundDomainMarkers,
                that.foregroundDomainMarkers)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.backgroundDomainMarkers,
                that.backgroundDomainMarkers)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.foregroundRangeMarkers,
                that.foregroundRangeMarkers)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.backgroundRangeMarkers,
                that.backgroundRangeMarkers)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.annotations, that.annotations)) {
            return false;
        }
        if (this.weight != that.weight) {
            return false;
        }
        if (!ObjectUtilities.equal(this.fixedDomainAxisSpace,
                that.fixedDomainAxisSpace)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.fixedRangeAxisSpace,
                that.fixedRangeAxisSpace)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.fixedLegendItems,
                that.fixedLegendItems)) {
            return false;
        }
        if (this.domainCrosshairVisible != that.domainCrosshairVisible) {
            return false;
        }
        if (this.crosshairDatasetIndex != that.crosshairDatasetIndex) {
            return false;
        }
        if (!ObjectUtilities.equal(this.domainCrosshairColumnKey,
                that.domainCrosshairColumnKey)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.domainCrosshairRowKey,
                that.domainCrosshairRowKey)) {
            return false;
        }
        if (!PaintUtilities.equal(this.domainCrosshairPaint,
                that.domainCrosshairPaint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.domainCrosshairStroke,
                that.domainCrosshairStroke)) {
            return false;
        }
        if (this.rangeMinorGridlinesVisible
                != that.rangeMinorGridlinesVisible) {
            return false;
        }
        if (!PaintUtilities.equal(this.rangeMinorGridlinePaint,
                that.rangeMinorGridlinePaint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.rangeMinorGridlineStroke,
                that.rangeMinorGridlineStroke)) {
            return false;
        }
        if (this.rangeZeroBaselineVisible != that.rangeZeroBaselineVisible) {
            return false;
        }
        if (!PaintUtilities.equal(this.rangeZeroBaselinePaint,
                that.rangeZeroBaselinePaint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.rangeZeroBaselineStroke,
                that.rangeZeroBaselineStroke)) {
            return false;
        }
        return super.equals(obj);

    }

    /**
     * Returns a clone of the plot.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  if the cloning is not supported.
     */
    public Object clone() throws CloneNotSupportedException {

        CategoryPlot clone = (CategoryPlot) super.clone();

        clone.domainAxes = new ObjectList();
        for (int i = 0; i < this.domainAxes.size(); i++) {
            CategoryAxis xAxis = (CategoryAxis) this.domainAxes.get(i);
            if (xAxis != null) {
                CategoryAxis clonedAxis = (CategoryAxis) xAxis.clone();
                clone.setDomainAxis(i, clonedAxis);
            }
        }
        clone.domainAxisLocations
                = (ObjectList) this.domainAxisLocations.clone();

        clone.rangeAxes = new ObjectList();
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis yAxis = (ValueAxis) this.rangeAxes.get(i);
            if (yAxis != null) {
                ValueAxis clonedAxis = (ValueAxis) yAxis.clone();
                clone.setRangeAxis(i, clonedAxis);
            }
        }
        clone.rangeAxisLocations = (ObjectList) this.rangeAxisLocations.clone();

        clone.datasets = (ObjectList) this.datasets.clone();
        for (int i = 0; i < clone.datasets.size(); i++) {
            CategoryDataset dataset = clone.getDataset(i);
            if (dataset != null) {
                dataset.addChangeListener(clone);
            }
        }
        clone.datasetToDomainAxesMap = new TreeMap();
        clone.datasetToDomainAxesMap.putAll(this.datasetToDomainAxesMap);
        clone.datasetToRangeAxesMap = new TreeMap();
        clone.datasetToRangeAxesMap.putAll(this.datasetToRangeAxesMap);

        clone.renderers = (ObjectList) this.renderers.clone();
        if (this.fixedDomainAxisSpace != null) {
            clone.fixedDomainAxisSpace = (AxisSpace) ObjectUtilities.clone(
                    this.fixedDomainAxisSpace);
        }
        if (this.fixedRangeAxisSpace != null) {
            clone.fixedRangeAxisSpace = (AxisSpace) ObjectUtilities.clone(
                    this.fixedRangeAxisSpace);
        }

        clone.annotations = (List) ObjectUtilities.deepClone(this.annotations);
        clone.foregroundDomainMarkers = cloneMarkerMap(
                this.foregroundDomainMarkers);
        clone.backgroundDomainMarkers = cloneMarkerMap(
                this.backgroundDomainMarkers);
        clone.foregroundRangeMarkers = cloneMarkerMap(
                this.foregroundRangeMarkers);
        clone.backgroundRangeMarkers = cloneMarkerMap(
                this.backgroundRangeMarkers);
        if (this.fixedLegendItems != null) {
            clone.fixedLegendItems
                    = (LegendItemCollection) this.fixedLegendItems.clone();
        }
        return clone;

    }

    /**
     * A utility method to clone the marker maps.
     *
     * @param map  the map to clone.
     *
     * @return A clone of the map.
     *
     * @throws CloneNotSupportedException if there is some problem cloning the
     *                                    map.
     */
    private Map cloneMarkerMap(Map map) throws CloneNotSupportedException {
        Map clone = new HashMap();
        Set keys = map.keySet();
        Iterator iterator = keys.iterator();
        while (iterator.hasNext()) {
            Object key = iterator.next();
            List entry = (List) map.get(key);
            Object toAdd = ObjectUtilities.deepClone(entry);
            clone.put(key, toAdd);
        }
        return clone;
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writeStroke(this.domainGridlineStroke, stream);
        SerialUtilities.writePaint(this.domainGridlinePaint, stream);
        SerialUtilities.writeStroke(this.rangeGridlineStroke, stream);
        SerialUtilities.writePaint(this.rangeGridlinePaint, stream);
        SerialUtilities.writeStroke(this.rangeCrosshairStroke, stream);
        SerialUtilities.writePaint(this.rangeCrosshairPaint, stream);
        SerialUtilities.writeStroke(this.domainCrosshairStroke, stream);
        SerialUtilities.writePaint(this.domainCrosshairPaint, stream);
        SerialUtilities.writeStroke(this.rangeMinorGridlineStroke, stream);
        SerialUtilities.writePaint(this.rangeMinorGridlinePaint, stream);
        SerialUtilities.writeStroke(this.rangeZeroBaselineStroke, stream);
        SerialUtilities.writePaint(this.rangeZeroBaselinePaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream)
        throws IOException, ClassNotFoundException {

        stream.defaultReadObject();
        this.domainGridlineStroke = SerialUtilities.readStroke(stream);
        this.domainGridlinePaint = SerialUtilities.readPaint(stream);
        this.rangeGridlineStroke = SerialUtilities.readStroke(stream);
        this.rangeGridlinePaint = SerialUtilities.readPaint(stream);
        this.rangeCrosshairStroke = SerialUtilities.readStroke(stream);
        this.rangeCrosshairPaint = SerialUtilities.readPaint(stream);
        this.domainCrosshairStroke = SerialUtilities.readStroke(stream);
        this.domainCrosshairPaint = SerialUtilities.readPaint(stream);
        this.rangeMinorGridlineStroke = SerialUtilities.readStroke(stream);
        this.rangeMinorGridlinePaint = SerialUtilities.readPaint(stream);
        this.rangeZeroBaselineStroke = SerialUtilities.readStroke(stream);
        this.rangeZeroBaselinePaint = SerialUtilities.readPaint(stream);

        for (int i = 0; i < this.domainAxes.size(); i++) {
            CategoryAxis xAxis = (CategoryAxis) this.domainAxes.get(i);
            if (xAxis != null) {
                xAxis.setPlot(this);
                xAxis.addChangeListener(this);
            }
        }
        for (int i = 0; i < this.rangeAxes.size(); i++) {
            ValueAxis yAxis = (ValueAxis) this.rangeAxes.get(i);
            if (yAxis != null) {
                yAxis.setPlot(this);
                yAxis.addChangeListener(this);
            }
        }
        int datasetCount = this.datasets.size();
        for (int i = 0; i < datasetCount; i++) {
            Dataset dataset = (Dataset) this.datasets.get(i);
            if (dataset != null) {
                dataset.addChangeListener(this);
            }
        }
        int rendererCount = this.renderers.size();
        for (int i = 0; i < rendererCount; i++) {
            CategoryItemRenderer renderer
                = (CategoryItemRenderer) this.renderers.get(i);
            if (renderer != null) {
                renderer.addChangeListener(this);
            }
        }

    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart CategoryPlot.java source code file:



my book on functional programming

 

new blog posts

 

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