/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 * See the GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License along with this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * ----------------

 * BarRenderer.java

 * ----------------

 * (C) Copyright 2002-2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   Christian W. Zuckschwerdt;

 *

 * $Id: BarRenderer.java,v 1.1 2004/08/31 14:47:48 mungady Exp $

 *

 * Changes

 * -------

 * 14-Mar-2002 : Version 1 (DG);

 * 23-May-2002 : Added tooltip generator to renderer (DG);

 * 29-May-2002 : Moved tooltip generator to abstract super-class (DG);

 * 25-Jun-2002 : Changed constructor to protected and removed redundant code (DG);

 * 26-Jun-2002 : Added axis to initialise method, and record upper and lower clip values (DG);

 * 24-Sep-2002 : Added getLegendItem(...) method (DG);

 * 09-Oct-2002 : Modified constructor to include URL generator (DG);

 * 05-Nov-2002 : Base dataset is now TableDataset not CategoryDataset (DG);

 * 10-Jan-2003 : Moved get/setItemMargin() method up from subclasses (DG);

 * 17-Jan-2003 : Moved plot classes into a separate package (DG);

 * 25-Mar-2003 : Implemented Serializable (DG);

 * 01-May-2003 : Modified clipping to allow for dual axes and datasets (DG);

 * 12-May-2003 : Merged horizontal and vertical bar renderers (DG);

 * 12-Jun-2003 : Updates for item labels (DG);

 * 30-Jul-2003 : Modified entity constructor (CZ);

 * 02-Sep-2003 : Changed initialise method to fix bug 790407 (DG);

 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);

 * 07-Oct-2003 : Added renderer state (DG);

 * 27-Oct-2003 : Merged drawHorizontalItem(...) and drawVerticalItem(...) methods (DG);

 * 28-Oct-2003 : Added support for gradient paint on bars (DG);

 * 14-Nov-2003 : Added 'maxBarWidth' attribute (DG);

 * 10-Feb-2004 : Small changes inside drawItem() method to ease cut-and-paste overriding (DG);

 * 19-Mar-2004 : Fixed bug introduced with separation of tool tip and item label generators.

 *               Fixed equals() method (DG);

 * 11-May-2004 : Fix for null pointer exception (bug id 951127) (DG);

 * 

 */



package org.jfree.chart.renderer.category;



import java.awt.Font;

import java.awt.GradientPaint;

import java.awt.Graphics2D;

import java.awt.Paint;

import java.awt.Shape;

import java.awt.Stroke;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.io.Serializable;



import org.jfree.chart.axis.CategoryAxis;

import org.jfree.chart.axis.ValueAxis;

import org.jfree.chart.entity.CategoryItemEntity;

import org.jfree.chart.entity.EntityCollection;

import org.jfree.chart.event.RendererChangeEvent;

import org.jfree.chart.labels.CategoryLabelGenerator;

import org.jfree.chart.labels.CategoryToolTipGenerator;

import org.jfree.chart.labels.ItemLabelAnchor;

import org.jfree.chart.labels.ItemLabelPosition;

import org.jfree.chart.plot.CategoryPlot;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.chart.plot.PlotRenderingInfo;

import org.jfree.data.category.CategoryDataset;

import org.jfree.ui.GradientPaintTransformer;

import org.jfree.ui.RectangleEdge;

import org.jfree.ui.RefineryUtilities;

import org.jfree.ui.StandardGradientPaintTransformer;

import org.jfree.util.ObjectUtils;

import org.jfree.util.PublicCloneable;



/**

 * A {@link CategoryItemRenderer} that draws individual data items as bars.

 */

public class BarRenderer extends AbstractCategoryItemRenderer 

                         implements Cloneable, PublicCloneable, Serializable {



    /** The default item margin percentage. */

    public static final double DEFAULT_ITEM_MARGIN = 0.20;



    /** Constant that controls the minimum width before a bar has an outline drawn. */

    public static final double BAR_OUTLINE_WIDTH_THRESHOLD = 3.0;



    /** The margin between items (bars) within a category. */

    private double itemMargin;



    /** A flag that controls whether or not bar outlines are drawn. */

    private boolean drawBarOutline;

    

    /** The maximum bar width as a percentage of the available space. */

    private double maxBarWidth;

    

    /** The minimum bar length (in Java2D units). */

    private double minimumBarLength;

    

    /** An optional class used to transform gradient paint objects to fit each bar. */

    private GradientPaintTransformer gradientPaintTransformer;

    

    /** The fallback position if a positive item label doesn't fit inside the bar. */

    private ItemLabelPosition positiveItemLabelPositionFallback;

    

    /** The fallback position if a negative item label doesn't fit inside the bar. */

    private ItemLabelPosition negativeItemLabelPositionFallback;

    

    /** The upper clip (axis) value for the axis. */

    private double upperClip;  // TODO:  this needs to move into the renderer state



    /** The lower clip (axis) value for the axis. */

    private double lowerClip;  // TODO:  this needs to move into the renderer state



    /**

     * Creates a new bar renderer with default settings.

     */

    public BarRenderer() {

        super();

        this.itemMargin = DEFAULT_ITEM_MARGIN;

        this.drawBarOutline = true;

        this.maxBarWidth = 1.0;  // 100 percent, so it will not apply unless changed

        this.positiveItemLabelPositionFallback = null;

        this.negativeItemLabelPositionFallback = null;

        this.gradientPaintTransformer = new StandardGradientPaintTransformer();

        this.minimumBarLength = 0.0;

    }



    /**

     * Returns the item margin as a percentage of the available space for all bars.

     *

     * @return The margin percentage (where 0.10 is ten percent).

     */

    public double getItemMargin() {

        return this.itemMargin;

    }



    /**

     * Sets the item margin and sends a {@link RendererChangeEvent} to all registered listeners.  

     * The value is expressed as a percentage of the available width for plotting all the bars, 

     * with the resulting amount to be distributed between all the bars evenly.

     *

     * @param percent  the margin (where 0.10 is ten percent).

     */

    public void setItemMargin(double percent) {

        this.itemMargin = percent;

        notifyListeners(new RendererChangeEvent(this));

    }



    /**

     * Returns a flag that controls whether or not bar outlines are drawn.

     * 

     * @return A boolean.

     */

    public boolean isDrawBarOutline() {

        return this.drawBarOutline;    

    }

    

    /**

     * Sets the flag that controls whether or not bar outlines are drawn and sends a 

     * {@link RendererChangeEvent} to all registered listeners.

     * 

     * @param draw  the flag.

     */

    public void setDrawBarOutline(boolean draw) {

        this.drawBarOutline = draw;

        notifyListeners(new RendererChangeEvent(this));

    }

    

    /**

     * Returns the maximum bar width, as a percentage of the available drawing space.

     * 

     * @return The maximum bar width.

     */

    public double getMaxBarWidth() {

        return this.maxBarWidth;

    }

    

    /**

     * Sets the maximum bar width, which is specified as a percentage of the available space

     * for all bars, and sends a {@link RendererChangeEvent} to all registered listeners.

     * 

     * @param percent  the percent (where 0.05 is five percent).

     */

    public void setMaxBarWidth(double percent) {

        this.maxBarWidth = percent;

        notifyListeners(new RendererChangeEvent(this));

    }



    /**

     * Returns the minimum bar length (in Java2D units).

     * 

     * @return The minimum bar length.

     */

    public double getMinimumBarLength() {

        return this.minimumBarLength;

    }

    

    /**

     * Sets the minimum bar length and sends a {@link RendererChangeEvent} to all registered

     * listeners.  The minimum bar length is specified in Java2D units, and can be used to prevent 

     * bars that represent very small data values from disappearing when drawn on the screen.

     * 

     * @param min  the minimum bar length (in Java2D units).

     */

    public void setMinimumBarLength(double min) {

        this.minimumBarLength = min;

        notifyListeners(new RendererChangeEvent(this));

    }

    

    /**

     * Returns the gradient paint transformer (an object used to transform gradient paint objects

     * to fit each bar.

     * 

     * @return A transformer (<code>null</code> possible).

     */    

    public GradientPaintTransformer getGradientPaintTransformer() {

        return this.gradientPaintTransformer;    

    }

    

    /**

     * Sets the gradient paint transformer and sends a {@link RendererChangeEvent} to all registered

     * listeners.

     * 

     * @param transformer  the transformer (<code>null</code> permitted).

     */

    public void setGradientPaintTransformer(GradientPaintTransformer transformer) {

        this.gradientPaintTransformer = transformer;

        notifyListeners(new RendererChangeEvent(this));

    }

    

    /**

     * Returns the fallback position for positive item labels that don't fit within a bar.

     * 

     * @return The fallback position (<code>null</code> possible).

     */

    public ItemLabelPosition getPositiveItemLabelPositionFallback() {

        return this.positiveItemLabelPositionFallback;

    }

    

    /**

     * Sets the fallback position for positive item labels that don't fit within a bar, and sends

     * a {@link RendererChangeEvent} to all registered listeners.

     * 

     * @param position  the position (<code>null</code> permitted).

     */

    public void setPositiveItemLabelPositionFallback(ItemLabelPosition position) {

        this.positiveItemLabelPositionFallback = position;

        notifyListeners(new RendererChangeEvent(this));

    }

    

    /**

     * Returns the fallback position for negative item labels that don't fit within a bar.

     * 

     * @return The fallback position (<code>null</code> possible).

     */

    public ItemLabelPosition getNegativeItemLabelPositionFallback() {

        return this.negativeItemLabelPositionFallback;

    }

    

    /**

     * Sets the fallback position for negative item labels that don't fit within a bar, and sends

     * a {@link RendererChangeEvent} to all registered listeners.

     * 

     * @param position  the position (<code>null</code> permitted).

     */

    public void setNegativeItemLabelPositionFallback(ItemLabelPosition position) {

        this.negativeItemLabelPositionFallback = position;

        notifyListeners(new RendererChangeEvent(this));

    }

    

    /**

     * Returns the lower clip value.  This value is recalculated in the initialise() method.

     *

     * @return The value.

     * 

     * @TODO:  this attribute should be transferred to the renderer state.

     */

    public double getLowerClip() {

        return this.lowerClip;

    }



    /**

     * Returns the upper clip value.  This value is recalculated in the initialise() method.

     *

     * @return The value.

     *

     * @TODO:  this attribute should be transferred to the renderer state.

     */

    public double getUpperClip() {

        return this.upperClip;

    }



    /**

     * Initialises the renderer and returns a state object that will be passed to subsequent calls 

     * to the drawItem method.  This method gets called once at the start of the process of 

     * drawing a chart.

     *

     * @param g2  the graphics device.

     * @param dataArea  the area in which the data is to be plotted.

     * @param plot  the plot.

     * @param rendererIndex  the renderer index.

     * @param info  collects chart rendering information for return to caller.

     * 

     * @return The renderer state.

     */

    public CategoryItemRendererState initialise(Graphics2D g2,

                                                Rectangle2D dataArea,

                                                CategoryPlot plot,

                                                int rendererIndex,

                                                PlotRenderingInfo info) {



        CategoryItemRendererState state = super.initialise(g2, dataArea, plot, rendererIndex, info);



        // get the clipping values...

        ValueAxis rangeAxis = getRangeAxis(plot, rendererIndex);

        this.lowerClip = rangeAxis.getRange().getLowerBound();

        this.upperClip = rangeAxis.getRange().getUpperBound();



        // calculate the bar width

        calculateBarWidth(plot, dataArea, rendererIndex, state);



        return state;

        

    }

    

    /**

     * Calculates the bar width and stores it in the renderer state.

     * 

     * @param plot  the plot.

     * @param dataArea  the data area.

     * @param rendererIndex  the renderer index.

     * @param state  the renderer state.

     */

    protected void calculateBarWidth(CategoryPlot plot, 

                                     Rectangle2D dataArea, 

                                     int rendererIndex,

                                     CategoryItemRendererState state) {

                                         

        CategoryAxis domainAxis = getDomainAxis(plot, rendererIndex);

        CategoryDataset dataset = plot.getDataset(rendererIndex);

        if (dataset != null) {

            int columns = dataset.getColumnCount();

            int rows = dataset.getRowCount();

            double space = 0.0;

            PlotOrientation orientation = plot.getOrientation();

            if (orientation == PlotOrientation.HORIZONTAL) {

                space = dataArea.getHeight();

            }

            else if (orientation == PlotOrientation.VERTICAL) {

                space = dataArea.getWidth();

            }

            double maxWidth = space * getMaxBarWidth();

            double categoryMargin = 0.0;

            double currentItemMargin = 0.0;

            if (columns > 1) {

                categoryMargin = domainAxis.getCategoryMargin();

            }

            if (rows > 1) {

                currentItemMargin = getItemMargin();

            }

            double used = space * (1 - domainAxis.getLowerMargin() - domainAxis.getUpperMargin()

                                     - categoryMargin - currentItemMargin);

            if ((rows * columns) > 0) {

                state.setBarWidth(Math.min(used / (rows * columns), maxWidth));

            }

            else {

                state.setBarWidth(Math.min(used, maxWidth));

            }

        }

    }



    /**

     * Calculates the coordinate of the first "side" of a bar.  This will be the minimum 

     * x-coordinate for a vertical bar, and the minimum y-coordinate for a horizontal bar.

     * 

     * @param plot  the plot.

     * @param orientation  the plot orientation.

     * @param dataArea  the data area.

     * @param domainAxis  the domain axis.

     * @param state  the renderer state (has the bar width precalculated).

     * @param row  the row index.

     * @param column  the column index.

     * 

     * @return the coordinate.

     */

    protected double calculateBarW0(CategoryPlot plot, 

                                    PlotOrientation orientation, 

                                    Rectangle2D dataArea,

                                    CategoryAxis domainAxis,

                                    CategoryItemRendererState state,

                                    int row,

                                    int column) {

        // calculate bar width...

        double space = 0.0;

        if (orientation == PlotOrientation.HORIZONTAL) {

            space = dataArea.getHeight();

        }

        else {

            space = dataArea.getWidth();

        }

        double barW0 = domainAxis.getCategoryStart(

            column, getColumnCount(), dataArea, plot.getDomainAxisEdge()

        );

        int seriesCount = getRowCount();

        int categoryCount = getColumnCount();

        if (seriesCount > 1) {

            double seriesGap = space * getItemMargin() / (categoryCount * (seriesCount - 1));

            double seriesW = calculateSeriesWidth(space, domainAxis, categoryCount, seriesCount);

            barW0 = barW0 + row * (seriesW + seriesGap) 

                          + (seriesW / 2.0) - (state.getBarWidth() / 2.0);

        }

        else {

            barW0 = domainAxis.getCategoryMiddle(

                column, getColumnCount(), dataArea, plot.getDomainAxisEdge()

            ) - state.getBarWidth() / 2.0;

        }

        return barW0;

    }

    

    /**

     * Calculates the coordinates for the length of a single bar.

     * 

     * @param value  the value represented by the bar.

     * 

     * @return the coordinates for each end of the bar (or <code>null</code> if the bar is not

     *         visible for the current axis range).

     */

    protected double[] calculateBarL0L1(double value) {



        double base = 0.0;

        double lclip = getLowerClip();

        double uclip = getUpperClip();

        if (uclip <= 0.0) {  // cases 1, 2, 3 and 4

            if (value >= uclip) {

                return null; // bar is not visible

            }

            base = uclip;

            if (value <= lclip) {

                value = lclip;

            }

        }

        else if (lclip <= 0.0) { // cases 5, 6, 7 and 8

            if (value >= uclip) {

                value = uclip;

            }

            else {

                if (value <= lclip) {

                    value = lclip;

                }

            }

        }

        else { // cases 9, 10, 11 and 12

            if (value <= lclip) {

                return null; // bar is not visible

            }

            base = lclip;

            if (value >= uclip) {

                value = uclip;

            }

        }

        return new double[] {base, value};

    }



    /**

     * Draws the bar for a single (series, category) data item.

     *

     * @param g2  the graphics device.

     * @param state  the renderer state.

     * @param dataArea  the data area.

     * @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).

     */

    public void drawItem(Graphics2D g2,

                         CategoryItemRendererState state,

                         Rectangle2D dataArea,

                         CategoryPlot plot,

                         CategoryAxis domainAxis,

                         ValueAxis rangeAxis,

                         CategoryDataset dataset,

                         int row,

                         int column) {



        // nothing is drawn for null values...

        Number dataValue = dataset.getValue(row, column);

        if (dataValue == null) {

            return;

        }

        

        double value = dataValue.doubleValue();

        

        PlotOrientation orientation = plot.getOrientation();

        double barW0 = calculateBarW0(plot, orientation, dataArea, domainAxis, state, row, column);

        double[] barL0L1 = calculateBarL0L1(value);

        if (barL0L1 == null) {

            return;  // the bar is not visible

        }

        

        RectangleEdge edge = plot.getRangeAxisEdge();

        double transL0 = rangeAxis.valueToJava2D(barL0L1[0], dataArea, edge);

        double transL1 = rangeAxis.valueToJava2D(barL0L1[1], dataArea, edge);

        double barL0 = Math.min(transL0, transL1);

        double barLength = Math.max(Math.abs(transL1 - transL0), getMinimumBarLength());



        // draw the bar...

        Rectangle2D bar = null;

        if (orientation == PlotOrientation.HORIZONTAL) {

            bar = new Rectangle2D.Double(barL0, barW0, barLength, state.getBarWidth());

        }

        else {

            bar = new Rectangle2D.Double(barW0, barL0, state.getBarWidth(), barLength);

        }

        Paint itemPaint = getItemPaint(row, column);

        if (getGradientPaintTransformer() != null && itemPaint instanceof GradientPaint) {

            GradientPaint gp = (GradientPaint) itemPaint;

            itemPaint = getGradientPaintTransformer().transform(gp, bar);

        }

        g2.setPaint(itemPaint);

        g2.fill(bar);



        // draw the outline...

        if (isDrawBarOutline() && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {

            Stroke stroke = getItemOutlineStroke(row, column);

            Paint paint = getItemOutlinePaint(row, column);

            if (stroke != null && paint != null) {

                g2.setStroke(stroke);

                g2.setPaint(paint);

                g2.draw(bar);

            }

        }



        CategoryLabelGenerator generator = getLabelGenerator(row, column);

        if (generator != null && isItemLabelVisible(row, column)) {

            drawItemLabel(g2, dataset, row, column, plot, generator, bar, (value < 0.0));

        }        

                

        // collect entity and tool tip information...

        if (state.getInfo() != null) {

            EntityCollection entities = state.getInfo().getOwner().getEntityCollection();

            if (entities != null) {

                String tip = null;

                CategoryToolTipGenerator tipster = getToolTipGenerator(row, column);

                if (tipster != null) {

                    tip = tipster.generateToolTip(dataset, row, column);

                }

                String url = null;

                if (getItemURLGenerator(row, column) != null) {

                    url = getItemURLGenerator(row, column).generateURL(dataset, row, column);

                }

                CategoryItemEntity entity = new CategoryItemEntity(

                    bar, tip, url, dataset, row, dataset.getColumnKey(column), column

                );

                entities.addEntity(entity);

            }

        }



    }



    /**

     * Calculates the available space for each series.

     * 

     * @param space  the space along the entire axis (in Java2D units).

     * @param axis  the category axis.

     * @param categories  the number of categories.

     * @param series  the number of series.

     * 

     * @return  the width of one series.

     */

    protected double calculateSeriesWidth(double space, CategoryAxis axis, 

                                          int categories, int series) {

        double factor = 1.0 - getItemMargin() - axis.getLowerMargin() - axis.getUpperMargin();

        if (categories > 1) {

            factor = factor - axis.getCategoryMargin();

        }

        return (space * factor) / (categories * series);

    }

    

    /**

     * Draws an item label.  This method is overridden so that the bar can be used

     * to calculate the label anchor point.

     * 

     * @param g2  the graphics device.

     * @param data  the dataset.

     * @param row  the row.

     * @param column  the column.

     * @param plot  the plot.

     * @param generator  the label generator.

     * @param bar  the bar.

     * @param negative  a flag indicating a negative value.

     */

    protected void drawItemLabel(Graphics2D g2,

                                 CategoryDataset data,

                                 int row,

                                 int column,

                                 CategoryPlot plot,

                                 CategoryLabelGenerator generator,

                                 Rectangle2D bar,

                                 boolean negative) {

                                     

        String label = generator.generateLabel(data, row, column);

        if (label == null) {

            return;  // nothing to do   

        }

        

        Font labelFont = getItemLabelFont(row, column);

        g2.setFont(labelFont);

        Paint paint = getItemLabelPaint(row, column);

        g2.setPaint(paint);



        // find out where to place the label...

        ItemLabelPosition position = null;

        if (!negative) {

            position = getPositiveItemLabelPosition(row, column);

        }

        else {

            position = getNegativeItemLabelPosition(row, column);

        }



        // work out the label anchor point...

        Point2D anchorPoint = calculateLabelAnchorPoint(

            position.getItemLabelAnchor(), bar, plot.getOrientation()

        );

        

        if (isInternalAnchor(position.getItemLabelAnchor())) {

            Shape bounds = RefineryUtilities.calculateRotatedStringBounds(

                label, g2,

                (float) anchorPoint.getX(),

                (float) anchorPoint.getY(),

                position.getTextAnchor(), 

                position.getRotationAnchor(), 

                position.getAngle()

            );

            

            if (bounds != null) {

                if (!bar.contains(bounds.getBounds2D())) {

                    if (!negative) {

                        position = getPositiveItemLabelPositionFallback();

                    }

                    else {

                        position = getNegativeItemLabelPositionFallback();

                    }

                    if (position != null) {

                        anchorPoint = calculateLabelAnchorPoint(

                            position.getItemLabelAnchor(), bar, plot.getOrientation()

                        );

                    }

                }

            }

        

        }

        

        if (position != null) {

            RefineryUtilities.drawRotatedString(

                label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(),

                position.getTextAnchor(), position.getRotationAnchor(), position.getAngle()

            );

        }        

    }

    

    /**

     * Calculates the item label anchor point.

     *

     * @param anchor  the anchor.

     * @param bar  the bar.

     * @param orientation  the plot orientation.

     *

     * @return The anchor point.

     */

    private Point2D calculateLabelAnchorPoint(ItemLabelAnchor anchor,

                                              Rectangle2D bar, PlotOrientation orientation) {



        Point2D result = null;

        double offset = getItemLabelAnchorOffset();

        double x0 = bar.getX() - offset;

        double x1 = bar.getX();

        double x2 = bar.getX() + offset;

        double x3 = bar.getCenterX();

        double x4 = bar.getMaxX() - offset;

        double x5 = bar.getMaxX();

        double x6 = bar.getMaxX() + offset;



        double y0 = bar.getMaxY() + offset;

        double y1 = bar.getMaxY();

        double y2 = bar.getMaxY() - offset;

        double y3 = bar.getCenterY();

        double y4 = bar.getMinY() + offset;

        double y5 = bar.getMinY();

        double y6 = bar.getMinY() - offset;



        if (anchor == ItemLabelAnchor.CENTER) {

            result = new Point2D.Double(x3, y3);

        }

        else if (anchor == ItemLabelAnchor.INSIDE1) {

            result = new Point2D.Double(x4, y4);

        }

        else if (anchor == ItemLabelAnchor.INSIDE2) {

            result = new Point2D.Double(x4, y4);

        }

        else if (anchor == ItemLabelAnchor.INSIDE3) {

            result = new Point2D.Double(x4, y3);

        }

        else if (anchor == ItemLabelAnchor.INSIDE4) {

            result = new Point2D.Double(x4, y2);

        }

        else if (anchor == ItemLabelAnchor.INSIDE5) {

            result = new Point2D.Double(x4, y2);

        }

        else if (anchor == ItemLabelAnchor.INSIDE6) {

            result = new Point2D.Double(x3, y2);

        }

        else if (anchor == ItemLabelAnchor.INSIDE7) {

            result = new Point2D.Double(x2, y2);

        }

        else if (anchor == ItemLabelAnchor.INSIDE8) {

            result = new Point2D.Double(x2, y2);

        }

        else if (anchor == ItemLabelAnchor.INSIDE9) {

            result = new Point2D.Double(x2, y3);

        }

        else if (anchor == ItemLabelAnchor.INSIDE10) {

            result = new Point2D.Double(x2, y4);

        }

        else if (anchor == ItemLabelAnchor.INSIDE11) {

            result = new Point2D.Double(x2, y4);

        }

        else if (anchor == ItemLabelAnchor.INSIDE12) {

            result = new Point2D.Double(x3, y4);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE1) {

            result = new Point2D.Double(x5, y6);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE2) {

            result = new Point2D.Double(x6, y5);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE3) {

            result = new Point2D.Double(x6, y3);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE4) {

            result = new Point2D.Double(x6, y1);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE5) {

            result = new Point2D.Double(x5, y0);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE6) {

            result = new Point2D.Double(x3, y0);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE7) {

            result = new Point2D.Double(x1, y0);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE8) {

            result = new Point2D.Double(x0, y1);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE9) {

            result = new Point2D.Double(x0, y3);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE10) {

            result = new Point2D.Double(x0, y5);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE11) {

            result = new Point2D.Double(x1, y6);

        }

        else if (anchor == ItemLabelAnchor.OUTSIDE12) {

            result = new Point2D.Double(x3, y6);

        }



        return result;



    }

    

    /**

     * Returns <code>true</code> if the specified anchor point is inside a bar.

     * 

     * @param anchor  the anchor point.

     * 

     * @return A boolean.

     */

    private boolean isInternalAnchor(ItemLabelAnchor anchor) {

        return anchor == ItemLabelAnchor.CENTER 

               || anchor == ItemLabelAnchor.INSIDE1

               || anchor == ItemLabelAnchor.INSIDE2

               || anchor == ItemLabelAnchor.INSIDE3

               || anchor == ItemLabelAnchor.INSIDE4

               || anchor == ItemLabelAnchor.INSIDE5

               || anchor == ItemLabelAnchor.INSIDE6

               || anchor == ItemLabelAnchor.INSIDE7

               || anchor == ItemLabelAnchor.INSIDE8

               || anchor == ItemLabelAnchor.INSIDE9

               || anchor == ItemLabelAnchor.INSIDE10

               || anchor == ItemLabelAnchor.INSIDE11

               || anchor == ItemLabelAnchor.INSIDE12;  

    }

    

    /**

     * Tests this instance for equality with an arbitrary object.

     * 

     * @param object  the object (<code>null</code> permitted).

     * 

     * @return A boolean.

     */

    public boolean equals(Object object) {

        

        if (object == null) {

            return false;

        }

        

        if (object == this) {

            return true;

        }

        

        if (super.equals(object) && (object instanceof BarRenderer)) {



            BarRenderer r = (BarRenderer) object;

            boolean b0 = (this.itemMargin == r.itemMargin);              

            boolean b1 = (this.drawBarOutline == r.drawBarOutline);

            boolean b2 = (this.maxBarWidth == r.maxBarWidth);

            boolean b3 = (this.minimumBarLength == r.minimumBarLength);

            boolean b4 = ObjectUtils.equal(

                this.gradientPaintTransformer, r.gradientPaintTransformer

            );

            boolean b5 = ObjectUtils.equal(

                this.positiveItemLabelPositionFallback, r.positiveItemLabelPositionFallback

            );

            boolean b6 = ObjectUtils.equal(

                this.negativeItemLabelPositionFallback, r.negativeItemLabelPositionFallback

            );

            return b0 && b1 && b2 && b3 && b4 && b5 && b6;

            

        }

        

        return false;

        

    }



}

