org.jfree.chart.util.Rotation Java Examples

@Override
protected JFreeChart createChart() {
    // create the chart...
    pieDataSet = createDataset();
    final JFreeChart chart = ChartFactory.createPieChart3D("", // chart
            // title
            pieDataSet, // data
            false, // include legend
            true, // tooltips?
            false // URLs?
    );

    // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
    chart.getTitle().setPaint(new Color(0x5E5E5E));
    chart.setBorderVisible(false);
    // set the background color for the chart...
    final PiePlot3D plot = (PiePlot3D) chart.getPlot();
    plot.setOutlineVisible(false);
    plot.setInsets(RectangleInsets.ZERO_INSETS);
    plot.setStartAngle(290);
    plot.setBackgroundPaint(Color.white);
    plot.setDirection(Rotation.CLOCKWISE);
    plot.setForegroundAlpha(0.5f);
    plot.setNoDataMessage("No data to display");
    plot.setLabelGenerator(new JFreeChartLabelCustom());

    final List keys = pieDataSet.getKeys();
    for (int i = 0; i < keys.size(); i++) {
        final Comparable key = (Comparable) keys.get(i);
        int colorIndex = i % CHART_COLOR_STR.size();
        plot.setSectionPaint(key, Color.decode("0x" + CHART_COLOR_STR.get(colorIndex)));
    }
    // OPTIONAL CUSTOMISATION COMPLETED.
    return chart;
}
 

/**
 * Sets the direction in which the pie sections are drawn and sends a 
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param direction  the direction (<code>null</code> not permitted).
 * 
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    notifyListeners(new PlotChangeEvent(this));

}
 

/**
 * Creates a new spider web plot with the given dataset.
 * 
 * @param dataset  the dataset.
 * @param extract  controls how data is extracted ({@link TableOrder#BY_ROW}
 *                 or {@link TableOrder#BY_COLUMN}).
 */
public SpiderWebPlot(CategoryDataset dataset, TableOrder extract) {
    super();
    if (extract == null) {
        throw new IllegalArgumentException("Null 'extract' argument.");
    }
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }

    this.dataExtractOrder = extract;
    this.headPercent = DEFAULT_HEAD;
    this.axisLabelGap = DEFAULT_AXIS_LABEL_GAP;
    this.axisLinePaint = Color.black;
    this.axisLineStroke = new BasicStroke(1.0f);
    
    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.maxValue = DEFAULT_MAX_VALUE;

    this.seriesPaint = null;
    this.seriesPaintList = new PaintList();
    this.baseSeriesPaint = null;

    this.seriesOutlinePaint = null;
    this.seriesOutlinePaintList = new PaintList();
    this.baseSeriesOutlinePaint = DEFAULT_OUTLINE_PAINT;

    this.seriesOutlineStroke = null;
    this.seriesOutlineStrokeList = new StrokeList();
    this.baseSeriesOutlineStroke = DEFAULT_OUTLINE_STROKE;

    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelGenerator = new StandardCategoryItemLabelGenerator();
    
    this.legendItemShape = DEFAULT_LEGEND_ITEM_CIRCLE;
}
 

private double calculateAngleForValue(double value, double total) {
    if (this.direction == Rotation.CLOCKWISE) {
        return this.startAngle - (value / total * 360.0);
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        return this.startAngle + (value / total * 360.0);
    }
    throw new RuntimeException("Unrecognised Rotation type.");
}
 

/**
 * Sets the direction in which the pie sections are drawn and sends a 
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param direction  the direction (<code>null</code> not permitted).
 * 
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    notifyListeners(new PlotChangeEvent(this));

}
 

/**
 * Creates a new spider web plot with the given dataset.
 *
 * @param dataset  the dataset.
 * @param extract  controls how data is extracted ({@link TableOrder#BY_ROW}
 *                 or {@link TableOrder#BY_COLUMN}).
 */
public SpiderWebPlot(CategoryDataset dataset, TableOrder extract) {
    super();
    if (extract == null) {
        throw new IllegalArgumentException("Null 'extract' argument.");
    }
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }

    this.dataExtractOrder = extract;
    this.headPercent = DEFAULT_HEAD;
    this.axisLabelGap = DEFAULT_AXIS_LABEL_GAP;
    this.axisLinePaint = Color.black;
    this.axisLineStroke = new BasicStroke(1.0f);

    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.maxValue = DEFAULT_MAX_VALUE;

    this.seriesPaint = null;
    this.seriesPaintList = new PaintList();
    this.baseSeriesPaint = null;

    this.seriesOutlinePaint = null;
    this.seriesOutlinePaintList = new PaintList();
    this.baseSeriesOutlinePaint = DEFAULT_OUTLINE_PAINT;

    this.seriesOutlineStroke = null;
    this.seriesOutlineStrokeList = new StrokeList();
    this.baseSeriesOutlineStroke = DEFAULT_OUTLINE_STROKE;

    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelGenerator = new StandardCategoryItemLabelGenerator();

    this.legendItemShape = DEFAULT_LEGEND_ITEM_CIRCLE;
}
 

/**
 * Sets the direction in which the pie sections are drawn and sends a 
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param direction  the direction (<code>null</code> not permitted).
 * 
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    fireChangeEvent();

}
 

/**
 * Sets the direction in which the pie sections are drawn and sends a
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param direction  the direction (<code>null</code> not permitted).
 *
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    fireChangeEvent();

}
 

/**
 * Creates a plot that will draw a pie chart for the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> permitted).
 */
public PiePlot(PieDataset dataset) {
    super();
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }
    this.pieIndex = 0;
    
    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.circular = true;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.minimumArcAngleToDraw = DEFAULT_MINIMUM_ARC_ANGLE_TO_DRAW;

    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;

    this.sectionOutlinesVisible = true;
    this.sectionOutlinePaintMap = new PaintMap();
    this.baseSectionOutlinePaint = DEFAULT_OUTLINE_PAINT;

    this.sectionOutlineStrokeMap = new StrokeMap();
    this.baseSectionOutlineStroke = DEFAULT_OUTLINE_STROKE;
    
    this.explodePercentages = new TreeMap();

    this.labelGenerator = new StandardPieSectionLabelGenerator();
    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelBackgroundPaint = DEFAULT_LABEL_BACKGROUND_PAINT;
    this.labelOutlinePaint = DEFAULT_LABEL_OUTLINE_PAINT;
    this.labelOutlineStroke = DEFAULT_LABEL_OUTLINE_STROKE;
    this.labelShadowPaint = DEFAULT_LABEL_SHADOW_PAINT;
    this.labelLinksVisible = true;
    this.labelDistributor = new PieLabelDistributor(0);
    
    this.simpleLabels = false;
    this.simpleLabelOffset = new RectangleInsets(UnitType.RELATIVE, 0.18, 
            0.18, 0.18, 0.18);
    this.labelPadding = new RectangleInsets(2, 2, 2, 2);
    
    this.toolTipGenerator = null;
    this.urlGenerator = null;
    this.legendLabelGenerator = new StandardPieSectionLabelGenerator();
    this.legendLabelToolTipGenerator = null;
    this.legendLabelURLGenerator = null;
    this.legendItemShape = Plot.DEFAULT_LEGEND_ITEM_CIRCLE;
    
    this.ignoreNullValues = false;
    this.ignoreZeroValues = false;
}
 

/**
 * Returns a shape representing the hotspot for a pie section.
 *
 * @param g2  the graphics device.
 * @param dataArea  the area within which the data is being rendered.
 * @param selected  is the item selected?
 *
 * @return A shape equal to the hot spot for a data item.
 */
public Shape createHotSpotShape(Graphics2D g2, Rectangle2D dataArea,
        int section, boolean selected) {

    Number n = this.dataset.getValue(section);
    if (n == null) {
        return null;
    }
    double value = n.doubleValue();
    double angle1 = 0.0;
    double angle2 = 0.0;

    double total = DatasetUtilities.calculatePieDatasetTotal(this.dataset);
    double lead = 0.0;
    if (this.direction == Rotation.CLOCKWISE) {
        for (int i = 0; i < section; i++) {
            n = this.dataset.getValue(i);
            if (n != null) {
                value = n.doubleValue();
                if (value >= 0.0) {
                    lead = lead + value;
                }
            }
        }
        angle1 = getStartAngle() - lead / total * 360.0;
        angle2 = angle1 - value / total * 360.0;
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        angle1 = getStartAngle() + lead / total * 360.0;
        angle2 = angle1 + value / total * 360.0;
    }
    else {
        throw new IllegalStateException("Rotation type not recognised.");
    }

    double angle = (angle2 - angle1);
    if (Math.abs(angle) > getMinimumArcAngleToDraw()) {
        double ep = 0.0;
        double mep = getMaximumExplodePercent();
        if (mep > 0.0) {
            ep = getExplodePercent(getSectionKey(section)) / mep;
        }
        Rectangle2D arcBounds = getArcBounds(dataArea,
                dataArea, angle1, angle, ep);
        Arc2D.Double arc = new Arc2D.Double(arcBounds, angle1, angle,
                Arc2D.PIE);
        return arc;
    }
    return null;
}
 

/**
 * Draws a single data item.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param section  the section index.
 * @param selected  is the item selected?
 * @param dataArea  the data plot area.
 * @param state  state information for one chart.
 * @param currentPass  the current pass index.
 */
protected void drawItem(Graphics2D g2, int section, boolean selected, 
        Rectangle2D dataArea, PiePlotState state, int currentPass) {

    Number n = this.dataset.getValue(section);
    if (n == null) {
        return;
    }
    double value = n.doubleValue();
    double angle1 = 0.0;
    double angle2 = 0.0;

    if (this.direction == Rotation.CLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 - value / state.getTotal() * 360.0;
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 + value / state.getTotal() * 360.0;
    }
    else {
        throw new IllegalStateException("Rotation type not recognised.");
    }

    double angle = (angle2 - angle1);
    if (Math.abs(angle) > getMinimumArcAngleToDraw()) {
        double ep = 0.0;
        double mep = getMaximumExplodePercent();
        if (mep > 0.0) {
            ep = getExplodePercent(getSectionKey(section)) / mep;
        }
        Rectangle2D arcBounds = getArcBounds(state.getPieArea(),
                state.getExplodedPieArea(), angle1, angle, ep);
        Arc2D.Double arc = new Arc2D.Double(arcBounds, angle1, angle,
                Arc2D.PIE);

        if (currentPass == 0) {
            if (this.shadowPaint != null) {
                Shape shadowArc = ShapeUtilities.createTranslatedShape(
                        arc, (float) this.shadowXOffset,
                        (float) this.shadowYOffset);
                g2.setPaint(this.shadowPaint);
                g2.fill(shadowArc);
            }
        }
        else if (currentPass == 1) {
            Comparable key = getSectionKey(section);
            Paint paint = lookupSectionPaint(key, selected);
            Shape savedClip = g2.getClip();
            g2.clip(arc);
            g2.setPaint(paint);
            g2.fill(arc);

            Paint outlinePaint = lookupSectionOutlinePaint(key, selected);
            Stroke outlineStroke = lookupSectionOutlineStroke(key,
                    selected);
            if (this.sectionOutlinesVisible) {
                g2.setPaint(outlinePaint);
                g2.setStroke(outlineStroke);
                g2.draw(arc);
            }
            g2.setClip(savedClip);

            // update the linking line target for later
            // add an entity for the pie section
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    if (this.toolTipGenerator != null) {
                        tip = this.toolTipGenerator.generateToolTip(
                                this.dataset, key);
                    }
                    String url = null;
                    if (this.urlGenerator != null) {
                        url = this.urlGenerator.generateURL(this.dataset,
                                key, this.pieIndex);
                    }
                    PieSectionEntity entity = new PieSectionEntity(
                            arc, this.dataset, this.pieIndex, section, key,
                            tip, url);
                    entities.add(entity);
                }
            }
        }
    }
    state.setLatestAngle(angle2);
}
 

/**
 * Creates a plot that will draw a pie chart for the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> permitted).
 */
public PiePlot(PieDataset dataset) {
    super();
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }
    this.pieIndex = 0;
    
    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.circular = true;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.minimumArcAngleToDraw = DEFAULT_MINIMUM_ARC_ANGLE_TO_DRAW;

    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;

    this.sectionOutlinesVisible = true;
    this.sectionOutlinePaintMap = new PaintMap();
    this.baseSectionOutlinePaint = DEFAULT_OUTLINE_PAINT;

    this.sectionOutlineStrokeMap = new StrokeMap();
    this.baseSectionOutlineStroke = DEFAULT_OUTLINE_STROKE;
    
    this.explodePercentages = new TreeMap();

    this.labelGenerator = new StandardPieSectionLabelGenerator();
    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelBackgroundPaint = DEFAULT_LABEL_BACKGROUND_PAINT;
    this.labelOutlinePaint = DEFAULT_LABEL_OUTLINE_PAINT;
    this.labelOutlineStroke = DEFAULT_LABEL_OUTLINE_STROKE;
    this.labelShadowPaint = DEFAULT_LABEL_SHADOW_PAINT;
    this.labelLinksVisible = true;
    this.labelDistributor = new PieLabelDistributor(0);
    
    this.simpleLabels = false;
    this.simpleLabelOffset = new RectangleInsets(UnitType.RELATIVE, 0.18, 
            0.18, 0.18, 0.18);
    this.labelPadding = new RectangleInsets(2, 2, 2, 2);
    
    this.toolTipGenerator = null;
    this.urlGenerator = null;
    this.legendLabelGenerator = new StandardPieSectionLabelGenerator();
    this.legendLabelToolTipGenerator = null;
    this.legendLabelURLGenerator = null;
    this.legendItemShape = Plot.DEFAULT_LEGEND_ITEM_CIRCLE;
    
    this.ignoreNullValues = false;
    this.ignoreZeroValues = false;
}
 

/**
 * Creates a plot that will draw a pie chart for the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> permitted).
 */
public PiePlot(PieDataset dataset) {
    super();
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }
    this.pieIndex = 0;

    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.circular = true;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.minimumArcAngleToDraw = DEFAULT_MINIMUM_ARC_ANGLE_TO_DRAW;

    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

    this.sectionOutlinesVisible = true;
    this.sectionOutlinePaintMap = new PaintMap();
    this.baseSectionOutlinePaint = DEFAULT_OUTLINE_PAINT;
    this.autoPopulateSectionOutlinePaint = false;

    this.sectionOutlineStrokeMap = new StrokeMap();
    this.baseSectionOutlineStroke = DEFAULT_OUTLINE_STROKE;
    this.autoPopulateSectionOutlineStroke = false;

    this.explodePercentages = new TreeMap();

    this.labelGenerator = new StandardPieSectionLabelGenerator();
    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelBackgroundPaint = DEFAULT_LABEL_BACKGROUND_PAINT;
    this.labelOutlinePaint = DEFAULT_LABEL_OUTLINE_PAINT;
    this.labelOutlineStroke = DEFAULT_LABEL_OUTLINE_STROKE;
    this.labelShadowPaint = DEFAULT_LABEL_SHADOW_PAINT;
    this.labelLinksVisible = true;
    this.labelDistributor = new PieLabelDistributor(0);

    this.simpleLabels = false;
    this.simpleLabelOffset = new RectangleInsets(UnitType.RELATIVE, 0.18,
            0.18, 0.18, 0.18);
    this.labelPadding = new RectangleInsets(2, 2, 2, 2);

    this.toolTipGenerator = null;
    this.urlGenerator = null;
    this.legendLabelGenerator = new StandardPieSectionLabelGenerator();
    this.legendLabelToolTipGenerator = null;
    this.legendLabelURLGenerator = null;
    this.legendItemShape = Plot.DEFAULT_LEGEND_ITEM_CIRCLE;

    this.ignoreNullValues = false;
    this.ignoreZeroValues = false;

    this.selectedItemAttributes = new PieSelectionAttributes();
    this.shadowGenerator = new DefaultShadowGenerator();
}
 

/**
 * Draws a single data item.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param section  the section index.
 * @param dataArea  the data plot area.
 * @param state  state information for one chart.
 * @param currentPass  the current pass index.
 */
protected void drawItem(Graphics2D g2, int section, Rectangle2D dataArea,
                        PiePlotState state, int currentPass) {

    Number n = this.dataset.getValue(section);
    if (n == null) {
        return;   
    }
    double value = n.doubleValue();
    double angle1 = 0.0;
    double angle2 = 0.0;
    
    if (this.direction == Rotation.CLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 - value / state.getTotal() * 360.0;
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 + value / state.getTotal() * 360.0;         
    }
    else {
        throw new IllegalStateException("Rotation type not recognised.");   
    }
    
    double angle = (angle2 - angle1);
    if (Math.abs(angle) > getMinimumArcAngleToDraw()) {
        double ep = 0.0;
        double mep = getMaximumExplodePercent();
        if (mep > 0.0) {
            ep = getExplodePercent(getSectionKey(section)) / mep;                
        }
        Rectangle2D arcBounds = getArcBounds(state.getPieArea(), 
                state.getExplodedPieArea(), angle1, angle, ep);
        Arc2D.Double arc = new Arc2D.Double(arcBounds, angle1, angle, 
                Arc2D.PIE);
        
        if (currentPass == 0) {
            if (this.shadowPaint != null) {
                Shape shadowArc = ShapeUtilities.createTranslatedShape(
                        arc, (float) this.shadowXOffset, 
                        (float) this.shadowYOffset);
                g2.setPaint(this.shadowPaint);
                g2.fill(shadowArc);
            }
        }
        else if (currentPass == 1) {
            Comparable key = getSectionKey(section);
            Paint paint = lookupSectionPaint(key, true);
            g2.setPaint(paint);
            g2.fill(arc);

            Paint outlinePaint = lookupSectionOutlinePaint(key);
            Stroke outlineStroke = lookupSectionOutlineStroke(key);
            if (this.sectionOutlinesVisible) {
                g2.setPaint(outlinePaint);
                g2.setStroke(outlineStroke);
                g2.draw(arc);
            }
            
            // update the linking line target for later
            // add an entity for the pie section
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    if (this.toolTipGenerator != null) {
                        tip = this.toolTipGenerator.generateToolTip(
                                this.dataset, key);
                    }
                    String url = null;
                    if (this.urlGenerator != null) {
                        url = this.urlGenerator.generateURL(this.dataset, 
                                key, this.pieIndex);
                    }
                    PieSectionEntity entity = new PieSectionEntity(
                            arc, this.dataset, this.pieIndex, section, key,
                            tip, url);
                    entities.add(entity);
                }
            }
        }
    }    
    state.setLatestAngle(angle2);
}
 

/**
 * Draws a single data item.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param section  the section index.
 * @param dataArea  the data plot area.
 * @param state  state information for one chart.
 * @param currentPass  the current pass index.
 */
protected void drawItem(Graphics2D g2, int section, Rectangle2D dataArea,
                        PiePlotState state, int currentPass) {

    Number n = this.dataset.getValue(section);
    if (n == null) {
        return;   
    }
    double value = n.doubleValue();
    double angle1 = 0.0;
    double angle2 = 0.0;
    
    if (this.direction == Rotation.CLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 - value / state.getTotal() * 360.0;
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 + value / state.getTotal() * 360.0;         
    }
    else {
        throw new IllegalStateException("Rotation type not recognised.");   
    }
    
    double angle = (angle2 - angle1);
    if (Math.abs(angle) > getMinimumArcAngleToDraw()) {
        double ep = 0.0;
        double mep = getMaximumExplodePercent();
        if (mep > 0.0) {
            ep = getExplodePercent(getSectionKey(section)) / mep;                
        }
        Rectangle2D arcBounds = getArcBounds(state.getPieArea(), 
                state.getExplodedPieArea(), angle1, angle, ep);
        Arc2D.Double arc = new Arc2D.Double(arcBounds, angle1, angle, 
                Arc2D.PIE);
        
        if (currentPass == 0) {
            if (this.shadowPaint != null) {
                Shape shadowArc = ShapeUtilities.createTranslatedShape(
                        arc, (float) this.shadowXOffset, 
                        (float) this.shadowYOffset);
                g2.setPaint(this.shadowPaint);
                g2.fill(shadowArc);
            }
        }
        else if (currentPass == 1) {
            Comparable key = getSectionKey(section);
            Paint paint = lookupSectionPaint(key, true);
            g2.setPaint(paint);
            g2.fill(arc);

            Paint outlinePaint = lookupSectionOutlinePaint(key);
            Stroke outlineStroke = lookupSectionOutlineStroke(key);
            if (this.sectionOutlinesVisible) {
                g2.setPaint(outlinePaint);
                g2.setStroke(outlineStroke);
                g2.draw(arc);
            }
            
            // update the linking line target for later
            // add an entity for the pie section
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    if (this.toolTipGenerator != null) {
                        tip = this.toolTipGenerator.generateToolTip(
                                this.dataset, key);
                    }
                    String url = null;
                    if (this.urlGenerator != null) {
                        url = this.urlGenerator.generateURL(this.dataset, 
                                key, this.pieIndex);
                    }
                    PieSectionEntity entity = new PieSectionEntity(
                            arc, this.dataset, this.pieIndex, section, key,
                            tip, url);
                    entities.add(entity);
                }
            }
        }
    }    
    state.setLatestAngle(angle2);
}
 

/**
 * Creates a plot that will draw a pie chart for the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> permitted).
 */
public PiePlot(PieDataset dataset) {
    super();
    this.dataset = dataset;
    if (dataset != null) {
        dataset.addChangeListener(this);
    }
    this.pieIndex = 0;
    
    this.interiorGap = DEFAULT_INTERIOR_GAP;
    this.circular = true;
    this.startAngle = DEFAULT_START_ANGLE;
    this.direction = Rotation.CLOCKWISE;
    this.minimumArcAngleToDraw = DEFAULT_MINIMUM_ARC_ANGLE_TO_DRAW;

    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;

    this.sectionOutlinesVisible = true;
    this.sectionOutlinePaintMap = new PaintMap();
    this.baseSectionOutlinePaint = DEFAULT_OUTLINE_PAINT;

    this.sectionOutlineStrokeMap = new StrokeMap();
    this.baseSectionOutlineStroke = DEFAULT_OUTLINE_STROKE;
    
    this.explodePercentages = new TreeMap();

    this.labelGenerator = new StandardPieSectionLabelGenerator();
    this.labelFont = DEFAULT_LABEL_FONT;
    this.labelPaint = DEFAULT_LABEL_PAINT;
    this.labelBackgroundPaint = DEFAULT_LABEL_BACKGROUND_PAINT;
    this.labelOutlinePaint = DEFAULT_LABEL_OUTLINE_PAINT;
    this.labelOutlineStroke = DEFAULT_LABEL_OUTLINE_STROKE;
    this.labelShadowPaint = DEFAULT_LABEL_SHADOW_PAINT;
    this.labelLinksVisible = true;
    this.labelDistributor = new PieLabelDistributor(0);
    
    this.simpleLabels = false;
    this.simpleLabelOffset = new RectangleInsets(UnitType.RELATIVE, 0.18, 
            0.18, 0.18, 0.18);
    this.labelPadding = new RectangleInsets(2, 2, 2, 2);
    
    this.toolTipGenerator = null;
    this.urlGenerator = null;
    this.legendLabelGenerator = new StandardPieSectionLabelGenerator();
    this.legendLabelToolTipGenerator = null;
    this.legendLabelURLGenerator = null;
    this.legendItemShape = Plot.DEFAULT_LEGEND_ITEM_CIRCLE;
    
    this.ignoreNullValues = false;
    this.ignoreZeroValues = false;
}
 

/**
 * Draws a single data item.
 *
 * @param g2  the graphics device (<code>null</code> not permitted).
 * @param section  the section index.
 * @param dataArea  the data plot area.
 * @param state  state information for one chart.
 * @param currentPass  the current pass index.
 */
protected void drawItem(Graphics2D g2, int section, Rectangle2D dataArea,
                        PiePlotState state, int currentPass) {

    Number n = this.dataset.getValue(section);
    if (n == null) {
        return;   
    }
    double value = n.doubleValue();
    double angle1 = 0.0;
    double angle2 = 0.0;
    
    if (this.direction == Rotation.CLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 - value / state.getTotal() * 360.0;
    }
    else if (this.direction == Rotation.ANTICLOCKWISE) {
        angle1 = state.getLatestAngle();
        angle2 = angle1 + value / state.getTotal() * 360.0;         
    }
    else {
        throw new IllegalStateException("Rotation type not recognised.");   
    }
    
    double angle = (angle2 - angle1);
    if (Math.abs(angle) > getMinimumArcAngleToDraw()) {
        double ep = 0.0;
        double mep = getMaximumExplodePercent();
        if (mep > 0.0) {
            ep = getExplodePercent(getSectionKey(section)) / mep;                
        }
        Rectangle2D arcBounds = getArcBounds(state.getPieArea(), 
                state.getExplodedPieArea(), angle1, angle, ep);
        Arc2D.Double arc = new Arc2D.Double(arcBounds, angle1, angle, 
                Arc2D.PIE);
        
        if (currentPass == 0) {
            if (this.shadowPaint != null) {
                Shape shadowArc = ShapeUtilities.createTranslatedShape(
                        arc, (float) this.shadowXOffset, 
                        (float) this.shadowYOffset);
                g2.setPaint(this.shadowPaint);
                g2.fill(shadowArc);
            }
        }
        else if (currentPass == 1) {
            Comparable key = getSectionKey(section);
            Paint paint = lookupSectionPaint(key, true);
            g2.setPaint(paint);
            g2.fill(arc);

            Paint outlinePaint = lookupSectionOutlinePaint(key);
            Stroke outlineStroke = lookupSectionOutlineStroke(key);
            if (this.sectionOutlinesVisible) {
                g2.setPaint(outlinePaint);
                g2.setStroke(outlineStroke);
                g2.draw(arc);
            }
            
            // update the linking line target for later
            // add an entity for the pie section
            if (state.getInfo() != null) {
                EntityCollection entities = state.getEntityCollection();
                if (entities != null) {
                    String tip = null;
                    if (this.toolTipGenerator != null) {
                        tip = this.toolTipGenerator.generateToolTip(
                                this.dataset, key);
                    }
                    String url = null;
                    if (this.urlGenerator != null) {
                        url = this.urlGenerator.generateURL(this.dataset, 
                                key, this.pieIndex);
                    }
                    PieSectionEntity entity = new PieSectionEntity(
                            arc, this.dataset, this.pieIndex, section, key,
                            tip, url);
                    entities.add(entity);
                }
            }
        }
    }    
    state.setLatestAngle(angle2);
}
 

/**
 * Sets the direction in which the radar axes are drawn and sends a
 * {@link PlotChangeEvent} to all registered listeners.
 *
 * @param direction  the direction (<code>null</code> not permitted).
 *
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    fireChangeEvent();
}
 

/**
 * Sets the direction in which the radar axes are drawn and sends a
 * {@link PlotChangeEvent} to all registered listeners.
 * 
 * @param direction  the direction (<code>null</code> not permitted).
 * 
 * @see #getDirection()
 */
public void setDirection(Rotation direction) {
    if (direction == null) {
        throw new IllegalArgumentException("Null 'direction' argument.");
    }
    this.direction = direction;
    fireChangeEvent();
}
 

/**
 * Returns the direction in which the pie sections are drawn (clockwise or 
 * anti-clockwise).
 *
 * @return The direction (never <code>null</code>).
 * 
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}
 

/**
 * Returns the direction in which the pie sections are drawn (clockwise or
 * anti-clockwise).
 *
 * @return The direction (never <code>null</code>).
 *
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}
 

/**
 * Returns the direction in which the radar axes are drawn
 * (clockwise or anti-clockwise).
 * 
 * @return The direction (never <code>null</code>).
 * 
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}
 

/**
 * Returns the direction in which the radar axes are drawn
 * (clockwise or anti-clockwise).
 *
 * @return The direction (never <code>null</code>).
 *
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}
 

/**
 * Returns the direction in which the pie sections are drawn (clockwise or 
 * anti-clockwise).
 *
 * @return The direction (never <code>null</code>).
 * 
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}
 

/**
 * Returns the direction in which the pie sections are drawn (clockwise or 
 * anti-clockwise).
 *
 * @return The direction (never <code>null</code>).
 * 
 * @see #setDirection(Rotation)
 */
public Rotation getDirection() {
    return this.direction;
}