edu.dlnu.liuwenpeng.render.LineAndShapeRenderer.java Source code

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/* ===========================================================    
* JFreeChart : a free chart library for the Java(tm) platform    
* ===========================================================    
*    
* (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.    
*    
* Project Info:  http://www.jfree.org/jfreechart/index.html    
*    
* This library is free software; you can redistribute it and/or modify it    
* under the terms of the GNU Lesser General Public License as published by    
* the Free Software Foundation; either version 2.1 of the License, or    
* (at your option) any later version.    
*    
* This library is distributed in the hope that it will be useful, but    
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY    
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public    
* License for more details.    
*    
* You should have received a copy of the GNU Lesser General Public    
* License along with this library; if not, write to the Free Software    
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,    
* USA.    
*    
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.    
* in the United States and other countries.]    
*    
* -------------------------    
* LineAndShapeRenderer.java    
* -------------------------    
* (C) Copyright 2001-2007, by Object Refinery Limited and Contributors.    
*    
* Original Author:  David Gilbert (for Object Refinery Limited);    
* Contributor(s):   Mark Watson (www.markwatson.com);    
*                   Jeremy Bowman;    
*                   Richard Atkinson;    
*                   Christian W. Zuckschwerdt;    
*    
* Changes    
* -------    
* 23-Oct-2001 : Version 1 (DG);    
* 15-Nov-2001 : Modified to allow for null data values (DG);    
* 16-Jan-2002 : Renamed HorizontalCategoryItemRenderer.java    
*               --> CategoryItemRenderer.java (DG);    
* 05-Feb-2002 : Changed return type of the drawCategoryItem method from void    
*               to Shape, as part of the tooltips implementation (DG);    
* 11-May-2002 : Support for value label drawing (JB);    
* 29-May-2002 : Now extends AbstractCategoryItemRenderer (DG);    
* 25-Jun-2002 : Removed redundant import (DG);    
* 05-Aug-2002 : Small modification to drawCategoryItem method to support URLs    
*               for HTML image maps (RA);    
* 26-Sep-2002 : Fixed errors reported by Checkstyle (DG);    
* 11-Oct-2002 : Added new constructor to incorporate tool tip and URL    
*               generators (DG);    
* 24-Oct-2002 : Amendments for changes in CategoryDataset interface and    
*               CategoryToolTipGenerator interface (DG);    
* 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);    
* 06-Nov-2002 : Renamed drawCategoryItem() --> drawItem() and now using axis    
*               for category spacing (DG);    
* 17-Jan-2003 : Moved plot classes to a separate package (DG);    
* 10-Apr-2003 : Changed CategoryDataset to KeyedValues2DDataset in drawItem()    
*               method (DG);    
* 12-May-2003 : Modified to take into account the plot orientation (DG);    
* 29-Jul-2003 : Amended code that doesn't compile with JDK 1.2.2 (DG);    
* 30-Jul-2003 : Modified entity constructor (CZ);    
* 22-Sep-2003 : Fixed cloning (DG);    
* 10-Feb-2004 : Small change to drawItem() method to make cut-and-paste    
*               override easier (DG);    
* 16-Jun-2004 : Fixed bug (id=972454) with label positioning on horizontal    
*               charts (DG);    
* 15-Oct-2004 : Updated equals() method (DG);    
* 05-Nov-2004 : Modified drawItem() signature (DG);    
* 11-Nov-2004 : Now uses ShapeUtilities class to translate shapes (DG);    
* 27-Jan-2005 : Changed attribute names, modified constructor and removed    
*               constants (DG);    
* 01-Feb-2005 : Removed unnecessary constants (DG);    
* 15-Mar-2005 : Fixed bug 1163897, concerning outlines for shapes (DG);    
* 13-Apr-2005 : Check flags that control series visibility (DG);    
* 20-Apr-2005 : Use generators for legend labels, tooltips and URLs (DG);    
* 09-Jun-2005 : Use addItemEntity() method (DG);    
* ------------- JFREECHART 1.0.x ---------------------------------------------    
* 25-May-2006 : Added check to drawItem() to detect when both the line and    
*               the shape are not visible (DG);    
* 20-Apr-2007 : Updated getLegendItem() for renderer change (DG);    
* 17-May-2007 : Set datasetIndex and seriesIndex in getLegendItem() (DG);    
* 18-May-2007 : Set dataset and seriesKey for LegendItem (DG);    
* 24-Sep-2007 : Deprecated redundant fields/methods (DG);    
* 27-Sep-2007 : Added option to offset series x-position within category (DG);    
*    
*/

package edu.dlnu.liuwenpeng.render;

import java.awt.Color;
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.Rectangle2D;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.LinkedList;

import org.jfree.chart.LegendItem;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.entity.EntityCollection;
import org.jfree.chart.event.RendererChangeEvent;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.AbstractCategoryItemRenderer;
import org.jfree.chart.renderer.category.CategoryItemRendererState;
import org.jfree.data.category.CategoryDataset;
import org.jfree.util.BooleanList;
import org.jfree.util.BooleanUtilities;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PublicCloneable;
import org.jfree.util.ShapeUtilities;

import com.lowagie.text.List;

import edu.dlnu.liuwenpeng.EachTransactionSupport.GetAverage;

/**    
* A renderer that draws shapes for each data item, and lines between data    
* items (for use with the {@link CategoryPlot} class).    
*/
public class LineAndShapeRenderer extends AbstractCategoryItemRenderer
        implements Cloneable, PublicCloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = -197749519869226398L;

    /**    
    * A flag that controls whether or not lines are visible for ALL series.    
    *    
    * @deprecated As of 1.0.7 (this override flag is unnecessary).    
    */
    private Boolean linesVisible;

    /**    
    * A table of flags that control (per series) whether or not lines are    
    * visible.    
    */
    private BooleanList seriesLinesVisible;

    /**    
    * A flag indicating whether or not lines are drawn between non-null    
    * points.    
    */
    private boolean baseLinesVisible;

    /**    
    * A flag that controls whether or not shapes are visible for ALL series.    
    *    
    * @deprecated As of 1.0.7 (this override flag is unnecessary).    
    */
    private Boolean shapesVisible;

    /**    
    * A table of flags that control (per series) whether or not shapes are    
    * visible.    
    */
    private BooleanList seriesShapesVisible;

    /** The default value returned by the getShapeVisible() method. */
    private boolean baseShapesVisible;

    /**    
    * A flag that controls whether or not shapes are filled for ALL series.    
    *    
    * @deprecated As of 1.0.7 (this override flag is unnecessary).    
    */
    private Boolean shapesFilled;

    /**    
    * A table of flags that control (per series) whether or not shapes are    
    * filled.    
    */
    private BooleanList seriesShapesFilled;

    /** The default value returned by the getShapeFilled() method. */
    private boolean baseShapesFilled;

    /**    
    * A flag that controls whether the fill paint is used for filling    
    * shapes.    
    */
    private boolean useFillPaint;

    /** A flag that controls whether outlines are drawn for shapes. */
    private boolean drawOutlines;

    /**    
    * A flag that controls whether the outline paint is used for drawing shape    
    * outlines - if not, the regular series paint is used.    
    */
    private boolean useOutlinePaint;

    /**    
    * A flag that controls whether or not the x-position for each item is    
    * offset within the category according to the series.    
    *    
    * @since 1.0.7    
    */
    private boolean useSeriesOffset;

    /**    
    * The item margin used for series offsetting - this allows the positioning    
    * to match the bar positions of the {@link BarRenderer} class.    
    *    
    * @since 1.0.7    
    */
    private double itemMargin;

    /**    
    * Creates a renderer with both lines and shapes visible by default.    
    */
    public LineAndShapeRenderer() {
        this(true, true);
    }

    /**    
    * Creates a new renderer with lines and/or shapes visible.    
    *    
    * @param lines  draw lines?    
    * @param shapes  draw shapes?    
    */
    public LineAndShapeRenderer(boolean lines, boolean shapes) {
        super();
        this.linesVisible = null;
        this.seriesLinesVisible = new BooleanList();
        this.baseLinesVisible = lines;
        this.shapesVisible = null;
        this.seriesShapesVisible = new BooleanList();
        this.baseShapesVisible = shapes;
        this.shapesFilled = null;
        this.seriesShapesFilled = new BooleanList();
        this.baseShapesFilled = true;
        this.useFillPaint = false;
        this.drawOutlines = true;
        this.useOutlinePaint = false;
        this.useSeriesOffset = false; // preserves old behaviour    
        this.itemMargin = 0.0;
    }

    // LINES VISIBLE    

    /**    
    * Returns the flag used to control whether or not the line for an item is    
    * visible.    
    *    
    * @param series  the series index (zero-based).    
    * @param item  the item index (zero-based).    
    *    
    * @return A boolean.    
    */
    public boolean getItemLineVisible(int series, int item) {
        Boolean flag = this.linesVisible;
        if (flag == null) {
            flag = getSeriesLinesVisible(series);
        }
        if (flag != null) {
            return flag.booleanValue();
        } else {
            return this.baseLinesVisible;
        }
    }

    /**    
    * Returns a flag that controls whether or not lines are drawn for ALL    
    * series.  If this flag is <code>null</code>, then the "per series"    
    * settings will apply.    
    *    
    * @return A flag (possibly <code>null</code>).    
    *    
    * @see #setLinesVisible(Boolean)    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public Boolean getLinesVisible() {
        return this.linesVisible;
    }

    /**    
    * Sets a flag that controls whether or not lines are drawn between the    
    * items in ALL series, and sends a {@link RendererChangeEvent} to all    
    * registered listeners.  You need to set this to <code>null</code> if you    
    * want the "per series" settings to apply.    
    *    
    * @param visible  the flag (<code>null</code> permitted).    
    *    
    * @see #getLinesVisible()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setLinesVisible(Boolean visible) {
        this.linesVisible = visible;
        fireChangeEvent();
    }

    /**    
    * Sets a flag that controls whether or not lines are drawn between the    
    * items in ALL series, and sends a {@link RendererChangeEvent} to all    
    * registered listeners.    
    *    
    * @param visible  the flag.    
    *    
    * @see #getLinesVisible()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setLinesVisible(boolean visible) {
        setLinesVisible(BooleanUtilities.valueOf(visible));
    }

    /**    
    * Returns the flag used to control whether or not the lines for a series    
    * are visible.    
    *    
    * @param series  the series index (zero-based).    
    *    
    * @return The flag (possibly <code>null</code>).    
    *    
    * @see #setSeriesLinesVisible(int, Boolean)    
    */
    public Boolean getSeriesLinesVisible(int series) {
        return this.seriesLinesVisible.getBoolean(series);
    }

    /**    
    * Sets the 'lines visible' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param flag  the flag (<code>null</code> permitted).    
    *    
    * @see #getSeriesLinesVisible(int)    
    */
    public void setSeriesLinesVisible(int series, Boolean flag) {
        this.seriesLinesVisible.setBoolean(series, flag);
        fireChangeEvent();
    }

    /**    
    * Sets the 'lines visible' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param visible  the flag.    
    *    
    * @see #getSeriesLinesVisible(int)    
    */
    public void setSeriesLinesVisible(int series, boolean visible) {
        setSeriesLinesVisible(series, BooleanUtilities.valueOf(visible));
    }

    /**    
    * Returns the base 'lines visible' attribute.    
    *    
    * @return The base flag.    
    *    
    * @see #getBaseLinesVisible()    
    */
    public boolean getBaseLinesVisible() {
        return this.baseLinesVisible;
    }

    /**    
    * Sets the base 'lines visible' flag and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param flag  the flag.    
    *    
    * @see #getBaseLinesVisible()    
    */
    public void setBaseLinesVisible(boolean flag) {
        this.baseLinesVisible = flag;
        fireChangeEvent();
    }

    // SHAPES VISIBLE    

    /**    
    * Returns the flag used to control whether or not the shape for an item is    
    * visible.    
    *    
    * @param series  the series index (zero-based).    
    * @param item  the item index (zero-based).    
    *    
    * @return A boolean.    
    */
    public boolean getItemShapeVisible(int series, int item) {
        Boolean flag = this.shapesVisible;
        if (flag == null) {
            flag = getSeriesShapesVisible(series);
        }
        if (flag != null) {
            return flag.booleanValue();
        } else {
            return this.baseShapesVisible;
        }
    }

    /**    
    * Returns the flag that controls whether the shapes are visible for the    
    * items in ALL series.    
    *    
    * @return The flag (possibly <code>null</code>).    
    *    
    * @see #setShapesVisible(Boolean)    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public Boolean getShapesVisible() {
        return this.shapesVisible;
    }

    /**    
    * Sets the 'shapes visible' for ALL series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param visible  the flag (<code>null</code> permitted).    
    *    
    * @see #getShapesVisible()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setShapesVisible(Boolean visible) {
        this.shapesVisible = visible;
        fireChangeEvent();
    }

    /**    
    * Sets the 'shapes visible' for ALL series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param visible  the flag.    
    *    
    * @see #getShapesVisible()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setShapesVisible(boolean visible) {
        setShapesVisible(BooleanUtilities.valueOf(visible));
    }

    /**    
    * Returns the flag used to control whether or not the shapes for a series    
    * are visible.    
    *    
    * @param series  the series index (zero-based).    
    *    
    * @return A boolean.    
    *    
    * @see #setSeriesShapesVisible(int, Boolean)    
    */
    public Boolean getSeriesShapesVisible(int series) {
        return this.seriesShapesVisible.getBoolean(series);
    }

    /**    
    * Sets the 'shapes visible' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param visible  the flag.    
    *    
    * @see #getSeriesShapesVisible(int)    
    */
    public void setSeriesShapesVisible(int series, boolean visible) {
        setSeriesShapesVisible(series, BooleanUtilities.valueOf(visible));
    }

    /**    
    * Sets the 'shapes visible' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param flag  the flag.    
    *    
    * @see #getSeriesShapesVisible(int)    
    */
    public void setSeriesShapesVisible(int series, Boolean flag) {
        this.seriesShapesVisible.setBoolean(series, flag);
        fireChangeEvent();
    }

    /**    
    * Returns the base 'shape visible' attribute.    
    *    
    * @return The base flag.    
    *    
    * @see #setBaseShapesVisible(boolean)    
    */
    public boolean getBaseShapesVisible() {
        return this.baseShapesVisible;
    }

    /**    
    * Sets the base 'shapes visible' flag and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param flag  the flag.    
    *    
    * @see #getBaseShapesVisible()    
    */
    public void setBaseShapesVisible(boolean flag) {
        this.baseShapesVisible = flag;
        fireChangeEvent();
    }

    /**    
    * Returns <code>true</code> if outlines should be drawn for shapes, and    
    * <code>false</code> otherwise.    
    *    
    * @return A boolean.    
    *    
    * @see #setDrawOutlines(boolean)    
    */
    public boolean getDrawOutlines() {
        return this.drawOutlines;
    }

    /**    
    * Sets the flag that controls whether outlines are drawn for    
    * shapes, and sends a {@link RendererChangeEvent} to all registered    
    * listeners.    
    * <P>    
    * In some cases, shapes look better if they do NOT have an outline, but    
    * this flag allows you to set your own preference.    
    *    
    * @param flag  the flag.    
    *    
    * @see #getDrawOutlines()    
    */
    public void setDrawOutlines(boolean flag) {
        this.drawOutlines = flag;
        fireChangeEvent();
    }

    /**    
    * Returns the flag that controls whether the outline paint is used for    
    * shape outlines.  If not, the regular series paint is used.    
    *    
    * @return A boolean.    
    *    
    * @see #setUseOutlinePaint(boolean)    
    */
    public boolean getUseOutlinePaint() {
        return this.useOutlinePaint;
    }

    /**    
    * Sets the flag that controls whether the outline paint is used for shape    
    * outlines, and sends a {@link RendererChangeEvent} to all registered    
    * listeners.    
    *    
    * @param use  the flag.    
    *    
    * @see #getUseOutlinePaint()    
    */
    public void setUseOutlinePaint(boolean use) {
        this.useOutlinePaint = use;
        fireChangeEvent();
    }

    // SHAPES FILLED    

    /**    
    * Returns the flag used to control whether or not the shape for an item    
    * is filled. The default implementation passes control to the    
    * <code>getSeriesShapesFilled</code> method. You can override this method    
    * if you require different behaviour.    
    *    
    * @param series  the series index (zero-based).    
    * @param item  the item index (zero-based).    
    *    
    * @return A boolean.    
    */
    public boolean getItemShapeFilled(int series, int item) {
        return getSeriesShapesFilled(series);
    }

    /**    
    * Returns the flag used to control whether or not the shapes for a series    
    * are filled.    
    *    
    * @param series  the series index (zero-based).    
    *    
    * @return A boolean.    
    */
    public boolean getSeriesShapesFilled(int series) {

        // return the overall setting, if there is one...    
        if (this.shapesFilled != null) {
            return this.shapesFilled.booleanValue();
        }

        // otherwise look up the paint table    
        Boolean flag = this.seriesShapesFilled.getBoolean(series);
        if (flag != null) {
            return flag.booleanValue();
        } else {
            return this.baseShapesFilled;
        }

    }

    /**    
    * Returns the flag that controls whether or not shapes are filled for    
    * ALL series.    
    *    
    * @return A Boolean.    
    *    
    * @see #setShapesFilled(Boolean)    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public Boolean getShapesFilled() {
        return this.shapesFilled;
    }

    /**    
    * Sets the 'shapes filled' for ALL series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param filled  the flag.    
    *    
    * @see #getShapesFilled()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setShapesFilled(boolean filled) {
        if (filled) {
            setShapesFilled(Boolean.TRUE);
        } else {
            setShapesFilled(Boolean.FALSE);
        }
    }

    /**    
    * Sets the 'shapes filled' for ALL series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param filled  the flag (<code>null</code> permitted).    
    *    
    * @see #getShapesFilled()    
    *    
    * @deprecated As of 1.0.7 (the override facility is unnecessary, just    
    *     use the per-series and base (default) settings).    
    */
    public void setShapesFilled(Boolean filled) {
        this.shapesFilled = filled;
        fireChangeEvent();
    }

    /**    
    * Sets the 'shapes filled' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param filled  the flag.    
    *    
    * @see #getSeriesShapesFilled(int)    
    */
    public void setSeriesShapesFilled(int series, Boolean filled) {
        this.seriesShapesFilled.setBoolean(series, filled);
        fireChangeEvent();
    }

    /**    
    * Sets the 'shapes filled' flag for a series and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param series  the series index (zero-based).    
    * @param filled  the flag.    
    *    
    * @see #getSeriesShapesFilled(int)    
    */
    public void setSeriesShapesFilled(int series, boolean filled) {
        // delegate    
        setSeriesShapesFilled(series, BooleanUtilities.valueOf(filled));
    }

    /**    
    * Returns the base 'shape filled' attribute.    
    *    
    * @return The base flag.    
    *    
    * @see #setBaseShapesFilled(boolean)    
    */
    public boolean getBaseShapesFilled() {
        return this.baseShapesFilled;
    }

    /**    
    * Sets the base 'shapes filled' flag and sends a    
    * {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param flag  the flag.    
    *    
    * @see #getBaseShapesFilled()    
    */
    public void setBaseShapesFilled(boolean flag) {
        this.baseShapesFilled = flag;
        fireChangeEvent();
    }

    /**    
    * Returns <code>true</code> if the renderer should use the fill paint    
    * setting to fill shapes, and <code>false</code> if it should just    
    * use the regular paint.    
    *    
    * @return A boolean.    
    *    
    * @see #setUseFillPaint(boolean)    
    */
    public boolean getUseFillPaint() {
        return this.useFillPaint;
    }

    /**    
    * Sets the flag that controls whether the fill paint is used to fill    
    * shapes, and sends a {@link RendererChangeEvent} to all    
    * registered listeners.    
    *    
    * @param flag  the flag.    
    *    
    * @see #getUseFillPaint()    
    */
    public void setUseFillPaint(boolean flag) {
        this.useFillPaint = flag;
        fireChangeEvent();
    }

    /**    
    * Returns the flag that controls whether or not the x-position for each    
    * data item is offset within the category according to the series.    
    *    
    * @return A boolean.    
    *    
    * @see #setUseSeriesOffset(boolean)    
    *    
    * @since 1.0.7    
    */
    public boolean getUseSeriesOffset() {
        return this.useSeriesOffset;
    }

    /**    
    * Sets the flag that controls whether or not the x-position for each    
    * data item is offset within its category according to the series, and    
    * sends a {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param offset  the offset.    
    *    
    * @see #getUseSeriesOffset()    
    *    
    * @since 1.0.7    
    */
    public void setUseSeriesOffset(boolean offset) {
        this.useSeriesOffset = offset;
        fireChangeEvent();
    }

    /**    
    * Returns the item margin, which is the gap between items within a    
    * category (expressed as a percentage of the overall category width).    
    * This can be used to match the offset alignment with the bars drawn by    
    * a {@link BarRenderer}).    
    *    
    * @return The item margin.    
    *    
    * @see #setItemMargin(double)    
    * @see #getUseSeriesOffset()    
    *    
    * @since 1.0.7    
    */
    public double getItemMargin() {
        return this.itemMargin;
    }

    /**    
    * Sets the item margin, which is the gap between items within a category    
    * (expressed as a percentage of the overall category width), and sends    
    * a {@link RendererChangeEvent} to all registered listeners.    
    *    
    * @param margin  the margin (0.0 <= margin < 1.0).    
    *    
    * @see #getItemMargin()    
    * @see #getUseSeriesOffset()    
    *    
    * @since 1.0.7    
    */
    public void setItemMargin(double margin) {
        if (margin < 0.0 || margin >= 1.0) {
            throw new IllegalArgumentException("Requires 0.0 <= margin < 1.0.");
        }
        this.itemMargin = margin;
        fireChangeEvent();
    }

    /**    
    * Returns a legend item for a series.    
    *    
    * @param datasetIndex  the dataset index (zero-based).    
    * @param series  the series index (zero-based).    
    *    
    * @return The legend item.    
    */
    public LegendItem getLegendItem(int datasetIndex, int series) {

        CategoryPlot cp = getPlot();
        if (cp == null) {
            return null;
        }

        if (isSeriesVisible(series) && isSeriesVisibleInLegend(series)) {
            CategoryDataset dataset = cp.getDataset(datasetIndex);
            String label = getLegendItemLabelGenerator().generateLabel(dataset, series);
            String description = label;
            String toolTipText = null;
            if (getLegendItemToolTipGenerator() != null) {
                toolTipText = getLegendItemToolTipGenerator().generateLabel(dataset, series);
            }
            String urlText = null;
            if (getLegendItemURLGenerator() != null) {
                urlText = getLegendItemURLGenerator().generateLabel(dataset, series);
            }
            Shape shape = lookupSeriesShape(series);
            Paint paint = lookupSeriesPaint(series);
            Paint fillPaint = (this.useFillPaint ? getItemFillPaint(series, 0) : paint);
            boolean shapeOutlineVisible = this.drawOutlines;
            Paint outlinePaint = (this.useOutlinePaint ? getItemOutlinePaint(series, 0) : paint);
            Stroke outlineStroke = lookupSeriesOutlineStroke(series);
            boolean lineVisible = getItemLineVisible(series, 0);
            boolean shapeVisible = getItemShapeVisible(series, 0);
            LegendItem result = new LegendItem(label, description, toolTipText, urlText, shapeVisible, shape,
                    getItemShapeFilled(series, 0), fillPaint, shapeOutlineVisible, outlinePaint, outlineStroke,
                    lineVisible, new Line2D.Double(-7.0, 0.0, 7.0, 0.0), getItemStroke(series, 0),
                    getItemPaint(series, 0));
            result.setDataset(dataset);
            result.setDatasetIndex(datasetIndex);
            result.setSeriesKey(dataset.getRowKey(series));
            result.setSeriesIndex(series);
            return result;
        }
        return null;

    }

    /**    
    * This renderer uses two passes to draw the data.    
    *    
    * @return The pass count (<code>2</code> for this renderer).    
    */
    public int getPassCount() {
        return 2;
    }

    /**    
    * Draw a single data item.    
    *    
    * @param g2  the graphics device.    
    * @param state  the renderer state.    
    * @param dataArea  the area in which the data is drawn.    
    * @param plot  the plot.    
    * @param domainAxis  the domain axis.    
    * @param rangeAxis  the range axis.    
    * @param dataset  the dataset.    
    * @param row  the row index (zero-based).    
    * @param column  the column index (zero-based).    
    * @param pass  the pass index.    
    */
    private java.util.List<Double> ls = new LinkedList<>();
    private Double average = 0.0;
    private int i = 0;

    public void drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot,
            CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass) {
        ls.add(dataset.getValue(0, column).doubleValue());

        if (!getItemVisible(row, column)) {
            return;
        }

        if (!getItemLineVisible(row, column) && !getItemShapeVisible(row, column)) {
            return;
        }

        // nothing is drawn for null...    
        Number v = dataset.getValue(row, column);
        if (v == null) {
            return;
        }

        PlotOrientation orientation = plot.getOrientation();

        // current data point...    
        double x1;
        if (this.useSeriesOffset) {
            x1 = domainAxis.getCategorySeriesMiddle(dataset.getColumnKey(column), dataset.getRowKey(row), dataset,
                    this.itemMargin, dataArea, plot.getDomainAxisEdge());
        } else {
            x1 = domainAxis.getCategoryMiddle(column, getColumnCount(), dataArea, plot.getDomainAxisEdge());
        }
        double value = v.doubleValue();
        double y1 = rangeAxis.valueToJava2D(value, dataArea, plot.getRangeAxisEdge());

        if (pass == 0 && getItemLineVisible(row, column)) {
            if (column != 0) {
                Number previousValue = dataset.getValue(row, column - 1);
                if (previousValue != null) {
                    // previous data point...    
                    double previous = previousValue.doubleValue();
                    double x0;
                    if (this.useSeriesOffset) {
                        x0 = domainAxis.getCategorySeriesMiddle(dataset.getColumnKey(column - 1),
                                dataset.getRowKey(row), dataset, this.itemMargin, dataArea,
                                plot.getDomainAxisEdge());
                    } else {
                        x0 = domainAxis.getCategoryMiddle(column - 1, getColumnCount(), dataArea,
                                plot.getDomainAxisEdge());
                    }
                    double y0 = rangeAxis.valueToJava2D(previous, dataArea, plot.getRangeAxisEdge());

                    Line2D line = null;
                    if (orientation == PlotOrientation.HORIZONTAL) {
                        line = new Line2D.Double(y0, x0, y1, x1);
                    } else if (orientation == PlotOrientation.VERTICAL) {
                        line = new Line2D.Double(x0, y0, x1, y1);
                    }
                    g2.setPaint(getItemPaint(row, column));
                    g2.setStroke(getItemStroke(row, column));
                    g2.draw(line);
                }
            }
        }

        if (pass == 1) {
            Shape shape = getItemShape(row, column);
            if (orientation == PlotOrientation.HORIZONTAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, y1, x1);
            } else if (orientation == PlotOrientation.VERTICAL) {
                shape = ShapeUtilities.createTranslatedShape(shape, x1, y1);
            }

            if (getItemShapeVisible(row, column)) {
                if (getItemShapeFilled(row, column)) {
                    if (this.useFillPaint) {
                        g2.setPaint(getItemFillPaint(row, column));
                    } else {
                        g2.setPaint(getItemPaint(row, column));
                    }
                    g2.fill(shape);
                }
                if (this.drawOutlines) {
                    if (this.useOutlinePaint) {
                        g2.setPaint(getItemOutlinePaint(row, column));
                    } else {
                        g2.setPaint(getItemPaint(row, column));
                    }
                    g2.setStroke(getItemOutlineStroke(row, column));
                    g2.draw(shape);

                }
            }

            // draw the item label if there is one...    
            if (isItemLabelVisible(row, column)) {
                if (orientation == PlotOrientation.HORIZONTAL) {
                    drawItemLabel(g2, orientation, dataset, row, column, y1, x1, (value < 0.0));
                } else if (orientation == PlotOrientation.VERTICAL) {
                    drawItemLabel(g2, orientation, dataset, row, column, x1, y1, (value < 0.0));
                }
            }

            // add an item entity, if this information is being collected    
            EntityCollection entities = state.getEntityCollection();
            if (entities != null) {
                addItemEntity(entities, dataset, row, column, shape);
            }
        }
        if (i == dataset.getColumnCount() - 1) {
            average = GetAverage.getAverage(ls);

            double averangeline = rangeAxis.valueToJava2D(average, dataArea, plot.getRangeAxisEdge());
            double x = rangeAxis.valueToJava2D(dataset.getColumnCount() - 1, dataArea, plot.getDomainAxisEdge());
            Line2D line2d = new Line2D.Double(0, averangeline, x, averangeline);
            g2.setPaint(Color.white);
            g2.draw(line2d);
            i = 0;
            ls.clear();
        }
        i++;
    }

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

        if (obj == this) {
            return true;
        }
        if (!(obj instanceof LineAndShapeRenderer)) {
            return false;
        }

        LineAndShapeRenderer that = (LineAndShapeRenderer) obj;
        if (this.baseLinesVisible != that.baseLinesVisible) {
            return false;
        }
        if (!ObjectUtilities.equal(this.seriesLinesVisible, that.seriesLinesVisible)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.linesVisible, that.linesVisible)) {
            return false;
        }
        if (this.baseShapesVisible != that.baseShapesVisible) {
            return false;
        }
        if (!ObjectUtilities.equal(this.seriesShapesVisible, that.seriesShapesVisible)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.shapesVisible, that.shapesVisible)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.shapesFilled, that.shapesFilled)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.seriesShapesFilled, that.seriesShapesFilled)) {
            return false;
        }
        if (this.baseShapesFilled != that.baseShapesFilled) {
            return false;
        }
        if (this.useOutlinePaint != that.useOutlinePaint) {
            return false;
        }
        if (this.useSeriesOffset != that.useSeriesOffset) {
            return false;
        }
        if (this.itemMargin != that.itemMargin) {
            return false;
        }
        return super.equals(obj);
    }

    /**    
     * Returns an independent copy of the renderer.    
     *    
     * @return A clone.    
     *    
     * @throws CloneNotSupportedException  should not happen.    
     */
    public Object clone() throws CloneNotSupportedException {
        LineAndShapeRenderer clone = (LineAndShapeRenderer) super.clone();
        clone.seriesLinesVisible = (BooleanList) this.seriesLinesVisible.clone();
        clone.seriesShapesVisible = (BooleanList) this.seriesShapesVisible.clone();
        clone.seriesShapesFilled = (BooleanList) this.seriesShapesFilled.clone();
        return clone;
    }

}