org.jfree.util.Rotation Java Examples

@Secured({"ROLE_ADMIN","ROLE_SURVEY_ADMIN"})
private JFreeChart createChart(PieDataset pieDataset, String title) {
try{
	JFreeChart chart = ChartFactory.createPieChart(title, pieDataset, false,true,false);

	chart.setBackgroundPaint(null);//this line necessary for transparency of background
       final ChartPanel chartPanel = new ChartPanel(chart);
       chartPanel.setOpaque(false); //this line necessary for transparency of background
       chartPanel.setBackground(new Color(0, 0, 0, 0)); //this line necessary for transparency of background
       
	PiePlot plot = (PiePlot) chart.getPlot();
	
	//Color[] colors = {new Color(170, 195, 217, 255),new Color(246, 140, 31, 255),new Color(204, 204, 204, 255),new Color(231, 238, 144, 255),new Color(51, 51, 51, 255),new Color(101, 125, 151, 255),new Color(0, 102, 255, 255)}; 
	//PieRenderer renderer = new PieRenderer(colors); 
	//renderer.setColor(plot, pieDataset);
	
	
	PieSectionLabelGenerator generator = new StandardPieSectionLabelGenerator("{0}:{1}%"); 
	plot.setLabelGenerator(generator);
	
	plot.setStartAngle(270);
	plot.setDirection(Rotation.CLOCKWISE);
	
	return chart;
} catch (Exception e) {
	log.error(e.getMessage(),e);
	throw (new RuntimeException(e));
}
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

@Override
public void afterReportInit() throws JRScriptletException
{
	DefaultPieDataset dataset = new DefaultPieDataset();
	dataset.setValue("Java", 43.2d);
	dataset.setValue("Visual Basic", 10.0d);
	dataset.setValue("C/C++", 17.5d);
	dataset.setValue("PHP", 32.5d);
	dataset.setValue("Perl", 1.0d);

	JFreeChart chart = 
		ChartFactory.createPieChart3D(
			"Pie Chart 3D Demo 1",
			dataset,
			true,
			true,
			false
			);

	PiePlot3D plot = (PiePlot3D) chart.getPlot();
	plot.setStartAngle(290);
	plot.setDirection(Rotation.CLOCKWISE);
	plot.setForegroundAlpha(0.5f);
	plot.setNoDataMessage("No data to display");

	/*   */
	this.setVariableValue("Chart", new JCommonDrawableRendererImpl(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));

}
 

private JFreeChart createChart(String title) {
  JFreeChart chart = ChartFactory.createPieChart3D(title, data, true, true, false);
  PiePlot3D plot = (PiePlot3D) chart.getPlot();
  plot.setStartAngle(290);
  plot.setDirection(Rotation.CLOCKWISE);
  plot.setForegroundAlpha(0.5f);
  return chart;
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

/**
 * Crée le graphe JFreeChart.
 *
 * @param piedataset
 *          : la source de données à afficher
 * @return le diagramme
 */
private JFreeChart createChart(GraphPieDataset piedataset) {
  JFreeChart jfreechart = ChartFactory.createPieChart3D(null, piedataset, false, true, false);
  jfreechart.setAntiAlias(true);
  jfreechart.setTextAntiAlias(true);

  PiePlot pieplot3d = (PiePlot) jfreechart.getPlot();
  pieplot3d.setInsets(new RectangleInsets(0, 0, 0, 0));
  final double angle = 290D;
  pieplot3d.setStartAngle(angle);
  pieplot3d.setDirection(Rotation.CLOCKWISE);
  final float foreground = 0.5F;
  pieplot3d.setForegroundAlpha(foreground);
  pieplot3d.setNoDataMessage(Messages.GraphStatsView_noDataToDisplay);
  pieplot3d.setCircular(true);

  pieplot3d.setOutlinePaint(null);
  pieplot3d.setLabelFont(new Font("SansSerif", Font.PLAIN, 10));
  pieplot3d.setLabelGap(0.02);
  pieplot3d.setLabelOutlinePaint(null);
  pieplot3d.setLabelShadowPaint(null);
  pieplot3d.setLabelBackgroundPaint(Color.WHITE);
  pieplot3d.setBackgroundPaint(Color.WHITE);
  // avoid showing the percentage as an absolute number in the tooltip
  pieplot3d.setToolTipGenerator(new StandardPieToolTipGenerator("{0}: {2}"));
  pieplot3d.setInteriorGap(0.02);
  pieplot3d.setMaximumLabelWidth(0.20);

  return jfreechart;
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

/**
 * 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();
    ParamChecks.nullNotPermitted(extract, "extract");
    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;
}
 

/**
 * 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;
}
 

/**
 * 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(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 && this.shadowGenerator == 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, state);
            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(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 && this.shadowGenerator == 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, state);
            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);
}
 

/**
   * Create a PieChart view that displays the data in a particular column.
   *
   * @param model Data source.
   * @param column Index of the column to collate.
   */
  public PieChartTab(MonitorModel model, int column) {
      super(model, false, ImageLoader.getNewIcon(MonitorWindow.PIE_ICON));

      String title = model.getName() + " - " + model.getColumnName(column);
      setName(title);

      pieModel = new TablePieDataset(model, column);

      chart = ChartFactory.createPieChart3D(null, pieModel, true, true, false);
      chart.setBackgroundPaint(getBackground());

      pieModel.calculate();

      // 2015-10-18 Changed to 3D pie
      final PiePlot3D plot = (PiePlot3D)chart.getPlot();

      //plot.setCircular(false);
      //plot.setRadius(0.60);
      //plot.setSectionLabelType(PiePlot.PERCENT_LABELS);

      plot.setStartAngle(270);
      plot.setDirection(Rotation.ANTICLOCKWISE);
      plot.setForegroundAlpha(0.6f);
      //plot.setInteriorGap(0.33);

      pieModel.addChangeListener(plot);

      chartpanel = new ChartPanel(chart, true);

      // 2015-10-18 Added setting below to keep the aspect ratio of 8:5
      // see http://www.jfree.org/forum/viewtopic.php?f=3&t=115763
      // Chart will always be drawn to an off-screen buffer that is the same size as the ChartPanel, so no scaling will happen when the offscreen image is copied to the panel.
      chartpanel.setPreferredSize(new Dimension (800, 300));
      chartpanel.setMinimumDrawWidth(0);
      chartpanel.setMaximumDrawWidth(Integer.MAX_VALUE);
      chartpanel.setMinimumDrawHeight(0);
      chartpanel.setMaximumDrawHeight(Integer.MAX_VALUE);

JPanel fixedSizePane = new JPanel(new FlowLayout());
fixedSizePane.add(chartpanel);
fixedSizePane.addComponentListener(new ComponentAdapter() {
          @Override
          public void componentResized(ComponentEvent e) {
          	int w = fixedSizePane.getWidth();
              int h = fixedSizePane.getHeight();
              int size =  Math.min(w, h);
              int newWidth = (int) (size *8D/3D);
              chartpanel.setPreferredSize(new Dimension(newWidth, size));
              fixedSizePane.revalidate();
          }
      });

      add(fixedSizePane, BorderLayout.CENTER);

      // 2015-10-18 Added rotator code
      final Rotator rotator = new Rotator(plot);
      rotator.start();
//System.out.println("PieChartTab : just done calling constructor");
  }
 

/**
 * Returns the center for the specified section.
 * Checks to see if the section is exploded and recalculates the
 * new center if so.
 *
 * @param state  PiePlotState
 * @param key  section key.
 *
 * @return The center for the specified section.
 *
 * @since 1.0.14
 */
protected Point2D getArcCenter(PiePlotState state, Comparable key) {
    Point2D center = new Point2D.Double(state.getPieCenterX(), state
        .getPieCenterY());

    double ep = getExplodePercent(key);
    double mep = getMaximumExplodePercent();
    if (mep > 0.0) {
        ep = ep / mep;
    }
    if (ep != 0) {
        Rectangle2D pieArea = state.getPieArea();
        Rectangle2D expPieArea = state.getExplodedPieArea();
        double angle1, angle2;
        Number n = this.dataset.getValue(key);
        double value = n.doubleValue();

        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);

        Arc2D arc1 = new Arc2D.Double(pieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point1 = arc1.getEndPoint();
        Arc2D.Double arc2 = new Arc2D.Double(expPieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point2 = arc2.getEndPoint();
        double deltaX = (point1.getX() - point2.getX()) * ep;
        double deltaY = (point1.getY() - point2.getY()) * ep;

        center = new Point2D.Double(state.getPieCenterX() - deltaX,
                 state.getPieCenterY() - deltaY);

    }
    return center;
}
 

/**
 * 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(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 && this.shadowGenerator == 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, state);
            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);
}
 

/**
 * Returns the center for the specified section.
 * Checks to see if the section is exploded and recalculates the
 * new center if so.
 *
 * @param state  PiePlotState
 * @param key  section key.
 *
 * @return The center for the specified section.
 *
 * @since 1.0.14
 */
protected Point2D getArcCenter(PiePlotState state, Comparable key) {
    Point2D center = new Point2D.Double(state.getPieCenterX(), state
        .getPieCenterY());

    double ep = getExplodePercent(key);
    double mep = getMaximumExplodePercent();
    if (mep > 0.0) {
        ep = ep / mep;
    }
    if (ep != 0) {
        Rectangle2D pieArea = state.getPieArea();
        Rectangle2D expPieArea = state.getExplodedPieArea();
        double angle1, angle2;
        Number n = this.dataset.getValue(key);
        double value = n.doubleValue();

        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);

        Arc2D arc1 = new Arc2D.Double(pieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point1 = arc1.getEndPoint();
        Arc2D.Double arc2 = new Arc2D.Double(expPieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point2 = arc2.getEndPoint();
        double deltaX = (point1.getX() - point2.getX()) * ep;
        double deltaY = (point1.getY() - point2.getY()) * ep;

        center = new Point2D.Double(state.getPieCenterX() - deltaX,
                 state.getPieCenterY() - deltaY);

    }
    return center;
}
 

/**
 * 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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

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

    this.sectionOutlineStroke = null;
    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.shadowGenerator = null;
}
 

/**
 * 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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

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

    this.sectionOutlineStroke = null;
    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.shadowGenerator = null;
}
 

/**
 * Returns the center for the specified section.
 * Checks to see if the section is exploded and recalculates the
 * new center if so.
 *
 * @param state  PiePlotState
 * @param key  section key.
 *
 * @return The center for the specified section.
 *
 * @since 1.0.14
 */
protected Point2D getArcCenter(PiePlotState state, Comparable key) {
    Point2D center = new Point2D.Double(state.getPieCenterX(), state
        .getPieCenterY());

    double ep = getExplodePercent(key);
    double mep = getMaximumExplodePercent();
    if (mep > 0.0) {
        ep = ep / mep;
    }
    if (ep != 0) {
        Rectangle2D pieArea = state.getPieArea();
        Rectangle2D expPieArea = state.getExplodedPieArea();
        double angle1, angle2;
        Number n = this.dataset.getValue(key);
        double value = n.doubleValue();

        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);

        Arc2D arc1 = new Arc2D.Double(pieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point1 = arc1.getEndPoint();
        Arc2D.Double arc2 = new Arc2D.Double(expPieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point2 = arc2.getEndPoint();
        double deltaX = (point1.getX() - point2.getX()) * ep;
        double deltaY = (point1.getY() - point2.getY()) * ep;

        center = new Point2D.Double(state.getPieCenterX() - deltaX,
                 state.getPieCenterY() - deltaY);

    }
    return center;
}
 

/**
 * 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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;

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

    this.sectionOutlineStroke = null;
    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.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 the center for the specified section.
 * Checks to see if the section is exploded and recalculates the
 * new center if so.
 *
 * @param state  PiePlotState
 * @param key  section key.
 *
 * @return The center for the specified section.
 *
 * @since 1.0.14
 */
protected Point2D getArcCenter(PiePlotState state, Comparable key) {
    Point2D center = new Point2D.Double(state.getPieCenterX(), state
        .getPieCenterY());

    double ep = getExplodePercent(key);
    double mep = getMaximumExplodePercent();
    if (mep > 0.0) {
        ep = ep / mep;
    }
    if (ep != 0) {
        Rectangle2D pieArea = state.getPieArea();
        Rectangle2D expPieArea = state.getExplodedPieArea();
        double angle1, angle2;
        Number n = this.dataset.getValue(key);
        double value = n.doubleValue();

        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);

        Arc2D arc1 = new Arc2D.Double(pieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point1 = arc1.getEndPoint();
        Arc2D.Double arc2 = new Arc2D.Double(expPieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point2 = arc2.getEndPoint();
        double deltaX = (point1.getX() - point2.getX()) * ep;
        double deltaY = (point1.getY() - point2.getY()) * ep;

        center = new Point2D.Double(state.getPieCenterX() - deltaX,
                 state.getPieCenterY() - deltaY);

    }
    return center;
}
 

/**
 * 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(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 && this.shadowGenerator == 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, state);
            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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

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

    this.sectionOutlineStroke = null;
    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.shadowGenerator = null;
}
 

/**
 * 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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

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

    this.sectionOutlineStroke = null;
    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.shadowGenerator = null;
}
 

/**
 * 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.sectionPaint = null;
    this.sectionPaintMap = new PaintMap();
    this.baseSectionPaint = Color.gray;
    this.autoPopulateSectionPaint = true;

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

    this.sectionOutlineStroke = null;
    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.shadowGenerator = null;
}
 

/**
 * 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(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);
}
 

/**
 * Returns the center for the specified section.
 * Checks to see if the section is exploded and recalculates the
 * new center if so.
 *
 * @param state  PiePlotState
 * @param key  section key.
 *
 * @return The center for the specified section.
 *
 * @since 1.0.14
 */
protected Point2D getArcCenter(PiePlotState state, Comparable key) {
    Point2D center = new Point2D.Double(state.getPieCenterX(), state
        .getPieCenterY());

    double ep = getExplodePercent(key);
    double mep = getMaximumExplodePercent();
    if (mep > 0.0) {
        ep = ep / mep;
    }
    if (ep != 0) {
        Rectangle2D pieArea = state.getPieArea();
        Rectangle2D expPieArea = state.getExplodedPieArea();
        double angle1, angle2;
        Number n = this.dataset.getValue(key);
        double value = n.doubleValue();

        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);

        Arc2D arc1 = new Arc2D.Double(pieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point1 = arc1.getEndPoint();
        Arc2D.Double arc2 = new Arc2D.Double(expPieArea, angle1, angle / 2,
                Arc2D.OPEN);
        Point2D point2 = arc2.getEndPoint();
        double deltaX = (point1.getX() - point2.getX()) * ep;
        double deltaY = (point1.getY() - point2.getY()) * ep;

        center = new Point2D.Double(state.getPieCenterX() - deltaX,
                 state.getPieCenterY() - deltaY);

    }
    return center;
}
 

/**
 * 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(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 && this.shadowGenerator == 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, state);
            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);
}