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## org.jfree.chart.renderer
Class AbstractXYItemRenderer

    java.lang.Object
      org.jfree.chart.renderer.AbstractRenderer
          org.jfree.chart.renderer.AbstractXYItemRenderer

All Implemented Interfaces:
  java.lang.Cloneable, java.io.Serializable, XYItemRenderer

Direct Known Subclasses:
  AreaXYRenderer, CandlestickRenderer, HighLowRenderer, SignalRenderer, StandardXYItemRenderer, WindItemRenderer, XYAreaRenderer, XYAreaRenderer2, XYBarRenderer, XYBoxAndWhiskerRenderer, XYBubbleRenderer, XYDifferenceRenderer, XYDotRenderer, XYLineAndShapeRenderer, XYStepAreaRenderer, XYStepRenderer, YIntervalRenderer

public abstract class AbstractXYItemRenderer
extends AbstractRenderer
implements XYItemRenderer, java.lang.Cloneable, java.io.Serializable

A base class that can be used to create new `XYItemRenderer` implementations.

See Also:
  Serialized Form

Field Summary

Fields inherited from class org.jfree.chart.renderer.AbstractRenderer
`DEFAULT_OUTLINE_PAINT, DEFAULT_OUTLINE_STROKE, DEFAULT_PAINT, DEFAULT_SHAPE, DEFAULT_STROKE, DEFAULT_VALUE_LABEL_FONT, DEFAULT_VALUE_LABEL_PAINT, ZERO`

Constructor Summary
`protected` | `AbstractXYItemRenderer()` Creates a renderer where the tooltip generator and the URL generator are both `null`.

Method Summary
`protected java.lang.Object` | `clone()` Returns a clone of the renderer.
`void` | `drawDomainGridLine(java.awt.Graphics2D g2, XYPlot plot, ValueAxis axis, java.awt.geom.Rectangle2D dataArea, double value)` Draws a grid line against the range axis.
`void` | `drawDomainMarker(java.awt.Graphics2D g2, XYPlot plot, ValueAxis domainAxis, Marker marker, java.awt.geom.Rectangle2D dataArea)` Draws a vertical line on the chart to represent a 'range marker'.
`protected void` | `drawItemLabel(java.awt.Graphics2D g2, PlotOrientation orientation, XYDataset dataset, int series, int item, double x, double y, boolean negative)` Draws an item label.
`void` | `drawRangeGridLine(java.awt.Graphics2D g2, XYPlot plot, ValueAxis axis, java.awt.geom.Rectangle2D dataArea, double value)` Draws a grid line against the range axis.
`void` | `drawRangeMarker(java.awt.Graphics2D g2, XYPlot plot, ValueAxis rangeAxis, Marker marker, java.awt.geom.Rectangle2D dataArea)` Draws a horizontal line across the chart to represent a 'range marker'.
`boolean` | `equals(java.lang.Object obj)` Tests this renderer for equality with another object.
`void` | `fillDomainGridBand(java.awt.Graphics2D g2, XYPlot plot, ValueAxis axis, java.awt.geom.Rectangle2D dataArea, double start, double end)` Fills a band between two values on the axis.
`void` | `fillRangeGridBand(java.awt.Graphics2D g2, XYPlot plot, ValueAxis axis, java.awt.geom.Rectangle2D dataArea, double start, double end)` Fills a band between two values on the range axis.
`XYLabelGenerator` | `getBaseLabelGenerator()` Returns the base item label generator.
`XYToolTipGenerator` | `getBaseToolTipGenerator()` Returns the base tool tip generator.
`DrawingSupplier` | `getDrawingSupplier()` Returns the drawing supplier from the plot.
`XYLabelGenerator` | `getLabelGenerator(int row, int column)` Returns the label generator for a data item.
`LegendItem` | `getLegendItem(int datasetIndex, int series)` Returns a legend item for a series.
`int` | `getPassCount()` Returns the number of passes through the data that the renderer requires in order to draw the chart.
`XYPlot` | `getPlot()` Returns the plot that the renderer is assigned to.
`Range` | `getRangeExtent(XYDataset dataset)` Returns the range of values the renderer requires to display all the items from the specified dataset.
`RangeType` | `getRangeType()` Returns the range type for the renderer.
`XYLabelGenerator` | `getSeriesLabelGenerator(int series)` Returns the label generator for a series.
`XYToolTipGenerator` | `getSeriesToolTipGenerator(int series)` Returns the tool tip generator for a series.
`XYToolTipGenerator` | `getToolTipGenerator(int row, int column)` Returns the tool tip generator for a data item.
`XYURLGenerator` | `getURLGenerator()` Returns the URL generator for HTML image maps.
`XYItemRendererState` | `initialise(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D dataArea, XYPlot plot, XYDataset data, PlotRenderingInfo info)` Initialises the renderer and returns a state object that should be passed to all subsequent calls to the drawItem() method.
`void` | `setBaseLabelGenerator(XYLabelGenerator generator)` Sets the base item label generator and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setBaseToolTipGenerator(XYToolTipGenerator generator)` Sets the base tool tip generator and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setLabelGenerator(XYLabelGenerator generator)` Sets the item label generator for ALL series and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setPlot(XYPlot plot)` Sets the plot that the renderer is assigned to.
`void` | `setSeriesLabelGenerator(int series, XYLabelGenerator generator)` Sets the label generator for a series and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setSeriesToolTipGenerator(int series, XYToolTipGenerator generator)` Sets the tool tip generator for a series and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setToolTipGenerator(XYToolTipGenerator generator)` Sets the tool tip generator for ALL series and sends a `RendererChangeEvent` to all registered listeners.
`void` | `setURLGenerator(XYURLGenerator urlGenerator)` Sets the URL generator for HTML image maps.
`protected void` | `updateCrosshairValues(CrosshairState crosshairState, double x, double y, double transX, double transY, PlotOrientation orientation)` Considers the current (x, y) coordinate and updates the crosshair point if it meets the criteria (usually means the (x, y) coordinate is the closest to the anchor point so far).

Methods inherited from class org.jfree.chart.renderer.AbstractRenderer
`addChangeListener, calculateLabelAnchorPoint, createTransformedShape, getBaseItemLabelAnchor, getBaseItemLabelAngle, getBaseItemLabelFont, getBaseItemLabelPaint, getBaseItemLabelRotationAnchor, getBaseItemLabelsVisible, getBaseItemLabelTextAnchor, getBaseNegativeItemLabelPosition, getBaseOutlinePaint, getBaseOutlineStroke, getBasePaint, getBasePositiveItemLabelPosition, getBaseShape, getBaseStroke, getItemLabelAnchor, getItemLabelAnchorOffset, getItemLabelAngle, getItemLabelFont, getItemLabelFont, getItemLabelPaint, getItemLabelPaint, getItemLabelRotationAnchor, getItemLabelTextAnchor, getItemOutlinePaint, getItemOutlineStroke, getItemPaint, getItemShape, getItemStroke, getNegativeItemLabelPosition, getNegativeItemLabelPosition, getPositiveItemLabelPosition, getPositiveItemLabelPosition, getSeriesItemLabelAnchor, getSeriesItemLabelAngle, getSeriesItemLabelFont, getSeriesItemLabelPaint, getSeriesItemLabelRotationAnchor, getSeriesItemLabelTextAnchor, getSeriesNegativeItemLabelPosition, getSeriesOutlinePaint, getSeriesOutlineStroke, getSeriesPaint, getSeriesPositiveItemLabelPosition, getSeriesShape, getSeriesStroke, hashCode, isItemLabelVisible, isSeriesItemLabelsVisible, notifyListeners, removeChangeListener, setBaseAngle, setBaseItemLabelAnchor, setBaseItemLabelFont, setBaseItemLabelFont, setBaseItemLabelPaint, setBaseItemLabelPaint, setBaseItemLabelRotationAnchor, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseItemLabelTextAnchor, setBaseNegativeItemLabelPosition, setBaseNegativeItemLabelPosition, setBaseOutlinePaint, setBaseOutlinePaint, setBaseOutlineStroke, setBaseOutlineStroke, setBasePaint, setBasePaint, setBasePositiveItemLabelPosition, setBasePositiveItemLabelPosition, setBaseShape, setBaseShape, setBaseStroke, setBaseStroke, setItemLabelAnchor, setItemLabelAnchorOffset, setItemLabelAngle, setItemLabelFont, setItemLabelFont, setItemLabelPaint, setItemLabelPaint, setItemLabelRotationAnchor, setItemLabelsVisible, setItemLabelsVisible, setItemLabelsVisible, setItemLabelTextAnchor, setNegativeItemLabelPosition, setNegativeItemLabelPosition, setOutlinePaint, setOutlinePaint, setOutlineStroke, setOutlineStroke, setPaint, setPaint, setPositiveItemLabelPosition, setPositiveItemLabelPosition, setSeriesAngle, setSeriesItemLabelAnchor, setSeriesItemLabelFont, setSeriesItemLabelFont, setSeriesItemLabelPaint, setSeriesItemLabelPaint, setSeriesItemLabelRotationAnchor, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesItemLabelTextAnchor, setSeriesNegativeItemLabelPosition, setSeriesNegativeItemLabelPosition, setSeriesOutlinePaint, setSeriesOutlinePaint, setSeriesOutlineStroke, setSeriesOutlineStroke, setSeriesPaint, setSeriesPaint, setSeriesPositiveItemLabelPosition, setSeriesPositiveItemLabelPosition, setSeriesShape, setSeriesShape, setSeriesStroke, setSeriesStroke, setShape, setShape, setStroke, setStroke`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.jfree.chart.renderer.XYItemRenderer
`addChangeListener, drawItem, getBaseItemLabelFont, getBaseItemLabelPaint, getBaseItemLabelsVisible, getBaseNegativeItemLabelPosition, getBaseOutlinePaint, getBaseOutlineStroke, getBasePaint, getBasePositiveItemLabelPosition, getBaseShape, getBaseStroke, getItemLabelFont, getItemLabelFont, getItemLabelPaint, getItemLabelPaint, getItemOutlinePaint, getItemOutlineStroke, getItemPaint, getItemShape, getItemStroke, getNegativeItemLabelPosition, getNegativeItemLabelPosition, getPositiveItemLabelPosition, getPositiveItemLabelPosition, getSeriesItemLabelFont, getSeriesItemLabelPaint, getSeriesNegativeItemLabelPosition, getSeriesOutlinePaint, getSeriesOutlineStroke, getSeriesPaint, getSeriesPositiveItemLabelPosition, getSeriesShape, getSeriesStroke, isItemLabelVisible, isSeriesItemLabelsVisible, removeChangeListener, setBaseItemLabelFont, setBaseItemLabelPaint, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseNegativeItemLabelPosition, setBaseNegativeItemLabelPosition, setBaseOutlinePaint, setBaseOutlineStroke, setBasePaint, setBasePositiveItemLabelPosition, setBasePositiveItemLabelPosition, setBaseShape, setBaseStroke, setItemLabelFont, setItemLabelPaint, setItemLabelsVisible, setItemLabelsVisible, setItemLabelsVisible, setNegativeItemLabelPosition, setNegativeItemLabelPosition, setOutlinePaint, setOutlineStroke, setPaint, setPositiveItemLabelPosition, setPositiveItemLabelPosition, setSeriesItemLabelFont, setSeriesItemLabelPaint, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesNegativeItemLabelPosition, setSeriesNegativeItemLabelPosition, setSeriesOutlinePaint, setSeriesOutlineStroke, setSeriesPaint, setSeriesPositiveItemLabelPosition, setSeriesPositiveItemLabelPosition, setSeriesShape, setSeriesStroke, setShape, setStroke`

Constructor Detail

### AbstractXYItemRenderer

    protected AbstractXYItemRenderer()

  Creates a renderer where the tooltip generator and the URL generator are both `null`.

Method Detail

### getPassCount

    public int getPassCount()

  Returns the number of passes through the data that the renderer requires in order to draw the chart. Most charts will require a single pass, but some require two passes.

  Specified by:
    `getPassCount` in interface `XYItemRenderer`
  Returns:
    The pass count.

### getPlot

    public XYPlot getPlot()

  Returns the plot that the renderer is assigned to.

  Specified by:
    `getPlot` in interface `XYItemRenderer`
  Returns:
    The plot.

### setPlot

    public void setPlot(XYPlot plot)

  Sets the plot that the renderer is assigned to.

  Specified by:
    `setPlot` in interface `XYItemRenderer`
  Parameters:
    `plot` - the plot.

### initialise

    public XYItemRendererState initialise(java.awt.Graphics2D g2,
                                          java.awt.geom.Rectangle2D dataArea,
                                          XYPlot plot,
                                          XYDataset data,
                                          PlotRenderingInfo info)

  Initialises the renderer and returns a state object that should be passed to all subsequent calls to the drawItem() method.

  This method will be called before the first item is rendered, giving the renderer an opportunity to initialise any state information it wants to maintain. The renderer can do nothing if it chooses.

  Specified by:
    `initialise` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `dataArea` - the area inside the axes.
    `plot` - the plot.
    `data` - the data.
    `info` - an optional info collection object to return data back to the caller.
  Returns:
    the renderer state (never `null`).

### getLabelGenerator

    public XYLabelGenerator getLabelGenerator(int row,
                                              int column)

  Returns the label generator for a data item. This implementation simply passes control to the `getSeriesLabelGenerator(int)` method. If, for some reason, you want a different generator for individual items, you can override this method.

  Specified by:
    `getLabelGenerator` in interface `XYItemRenderer`
  Parameters:
    `row` - the row index (zero based).
    `column` - the column index (zero based).
  Returns:
    the generator (possibly `null`).

### getSeriesLabelGenerator

    public XYLabelGenerator getSeriesLabelGenerator(int series)

  Returns the label generator for a series.

  Specified by:
    `getSeriesLabelGenerator` in interface `XYItemRenderer`
  Parameters:
    `series` - the series index (zero based).
  Returns:
    the generator (possibly `null`).

### setLabelGenerator

    public void setLabelGenerator(XYLabelGenerator generator)

  Sets the item label generator for ALL series and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setLabelGenerator` in interface `XYItemRenderer`
  Parameters:
    `generator` - the generator (`null` permitted).

### setSeriesLabelGenerator

    public void setSeriesLabelGenerator(int series,
                                        XYLabelGenerator generator)

  Sets the label generator for a series and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setSeriesLabelGenerator` in interface `XYItemRenderer`
  Parameters:
    `series` - the series index (zero based).
    `generator` - the generator (`null` permitted).

### getBaseLabelGenerator

    public XYLabelGenerator getBaseLabelGenerator()

  Returns the base item label generator.

  Specified by:
    `getBaseLabelGenerator` in interface `XYItemRenderer`
  Returns:
    the generator (possibly `null`).

### setBaseLabelGenerator

    public void setBaseLabelGenerator(XYLabelGenerator generator)

  Sets the base item label generator and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setBaseLabelGenerator` in interface `XYItemRenderer`
  Parameters:
    `generator` - the generator (`null` permitted).

### getToolTipGenerator

    public XYToolTipGenerator getToolTipGenerator(int row,
                                                  int column)

  Returns the tool tip generator for a data item. This implementation simply passes control to the getSeriesToolTipGenerator() method. If, for some reason, you want a different generator for individual items, you can override this method.

  Specified by:
    `getToolTipGenerator` in interface `XYItemRenderer`
  Parameters:
    `row` - the row index (zero based).
    `column` - the column index (zero based).
  Returns:
    The generator (possibly `null`).

### getSeriesToolTipGenerator

    public XYToolTipGenerator getSeriesToolTipGenerator(int series)

  Returns the tool tip generator for a series.

  Specified by:
    `getSeriesToolTipGenerator` in interface `XYItemRenderer`
  Parameters:
    `series` - the series index (zero based).
  Returns:
    The generator (possibly `null`).

### setToolTipGenerator

    public void setToolTipGenerator(XYToolTipGenerator generator)

  Sets the tool tip generator for ALL series and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setToolTipGenerator` in interface `XYItemRenderer`
  Parameters:
    `generator` - the generator (`null` permitted).

### setSeriesToolTipGenerator

    public void setSeriesToolTipGenerator(int series,
                                          XYToolTipGenerator generator)

  Sets the tool tip generator for a series and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setSeriesToolTipGenerator` in interface `XYItemRenderer`
  Parameters:
    `series` - the series index (zero based).
    `generator` - the generator (`null` permitted).

### getBaseToolTipGenerator

    public XYToolTipGenerator getBaseToolTipGenerator()

  Returns the base tool tip generator.

  Specified by:
    `getBaseToolTipGenerator` in interface `XYItemRenderer`
  Returns:
    The generator (possibly `null`).

### setBaseToolTipGenerator

    public void setBaseToolTipGenerator(XYToolTipGenerator generator)

  Sets the base tool tip generator and sends a `RendererChangeEvent` to all registered listeners.

  Specified by:
    `setBaseToolTipGenerator` in interface `XYItemRenderer`
  Parameters:
    `generator` - the generator (`null` permitted).

### getURLGenerator

    public XYURLGenerator getURLGenerator()

  Returns the URL generator for HTML image maps.

  Specified by:
    `getURLGenerator` in interface `XYItemRenderer`
  Returns:
    the URL generator (possibly `null`).

### setURLGenerator

    public void setURLGenerator(XYURLGenerator urlGenerator)

  Sets the URL generator for HTML image maps.

  Specified by:
    `setURLGenerator` in interface `XYItemRenderer`
  Parameters:
    `urlGenerator` - the URL generator (`null` permitted).

### getRangeType

    public RangeType getRangeType()

  Returns the range type for the renderer.

  The default implementation returns `STANDARD`, subclasses may override this behaviour.

  The `XYPlot` uses this information when auto-calculating the range for the axis.

  Specified by:
    `getRangeType` in interface `XYItemRenderer`
  Returns:
    the range type.

### getRangeExtent

    public Range getRangeExtent(XYDataset dataset)

  Returns the range of values the renderer requires to display all the items from the specified dataset.

  Specified by:
    `getRangeExtent` in interface `XYItemRenderer`
  Parameters:
    `dataset` - the dataset (`null` permitted).
  Returns:
    The range (or `null` if the dataset is `null` or empty).

### getLegendItem

    public LegendItem getLegendItem(int datasetIndex,
                                    int series)

  Returns a legend item for a series.

  Specified by:
    `getLegendItem` in interface `XYItemRenderer`
  Parameters:
    `datasetIndex` - the dataset index (zero-based).
    `series` - the series index (zero-based).
  Returns:
    a legend item for the series.

### fillDomainGridBand

    public void fillDomainGridBand(java.awt.Graphics2D g2,
                                   XYPlot plot,
                                   ValueAxis axis,
                                   java.awt.geom.Rectangle2D dataArea,
                                   double start,
                                   double end)

  Fills a band between two values on the axis. This can be used to color bands between the grid lines.

  Specified by:
    `fillDomainGridBand` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `axis` - the domain axis.
    `dataArea` - the data area.
    `start` - the start value.
    `end` - the end value.

### fillRangeGridBand

    public void fillRangeGridBand(java.awt.Graphics2D g2,
                                  XYPlot plot,
                                  ValueAxis axis,
                                  java.awt.geom.Rectangle2D dataArea,
                                  double start,
                                  double end)

  Fills a band between two values on the range axis. This can be used to color bands between the grid lines.

  Specified by:
    `fillRangeGridBand` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `axis` - the range axis.
    `dataArea` - the data area.
    `start` - the start value.
    `end` - the end value.

### drawDomainGridLine

    public void drawDomainGridLine(java.awt.Graphics2D g2,
                                   XYPlot plot,
                                   ValueAxis axis,
                                   java.awt.geom.Rectangle2D dataArea,
                                   double value)

  Draws a grid line against the range axis.

  Specified by:
    `drawDomainGridLine` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `axis` - the value axis.
    `dataArea` - the area for plotting data (not yet adjusted for any 3D effect).
    `value` - the value at which the grid line should be drawn.

### drawRangeGridLine

    public void drawRangeGridLine(java.awt.Graphics2D g2,
                                  XYPlot plot,
                                  ValueAxis axis,
                                  java.awt.geom.Rectangle2D dataArea,
                                  double value)

  Draws a grid line against the range axis.

  Specified by:
    `drawRangeGridLine` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `axis` - the value axis.
    `dataArea` - the area for plotting data (not yet adjusted for any 3D effect).
    `value` - the value at which the grid line should be drawn.

### drawDomainMarker

    public void drawDomainMarker(java.awt.Graphics2D g2,
                                 XYPlot plot,
                                 ValueAxis domainAxis,
                                 Marker marker,
                                 java.awt.geom.Rectangle2D dataArea)

  Draws a vertical line on the chart to represent a 'range marker'.

  Specified by:
    `drawDomainMarker` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `domainAxis` - the domain axis.
    `marker` - the marker line.
    `dataArea` - the axis data area.

### drawRangeMarker

    public void drawRangeMarker(java.awt.Graphics2D g2,
                                XYPlot plot,
                                ValueAxis rangeAxis,
                                Marker marker,
                                java.awt.geom.Rectangle2D dataArea)

  Draws a horizontal line across the chart to represent a 'range marker'.

  Specified by:
    `drawRangeMarker` in interface `XYItemRenderer`
  Parameters:
    `g2` - the graphics device.
    `plot` - the plot.
    `rangeAxis` - the range axis.
    `marker` - the marker line.
    `dataArea` - the axis data area.

### clone

    protected java.lang.Object clone()
                              throws java.lang.CloneNotSupportedException

  Returns a clone of the renderer.

  Overrides:
    `clone` in class `AbstractRenderer`
  Returns:
    A clone.
  Throws:
    `java.lang.CloneNotSupportedException` - if the renderer does not support cloning.

### equals

    public boolean equals(java.lang.Object obj)

  Tests this renderer for equality with another object.

  Overrides:
    `equals` in class `AbstractRenderer`
  Parameters:
    `obj` - the object.
  Returns:
    `true` or `false`.

### getDrawingSupplier

    public DrawingSupplier getDrawingSupplier()

  Returns the drawing supplier from the plot.

  Specified by:
    `getDrawingSupplier` in class `AbstractRenderer`
  Returns:
    The drawing supplier (possibly `null`).

### updateCrosshairValues

    protected void updateCrosshairValues(CrosshairState crosshairState,
                                         double x,
                                         double y,
                                         double transX,
                                         double transY,
                                         PlotOrientation orientation)

  Considers the current (x, y) coordinate and updates the crosshair point if it meets the criteria (usually means the (x, y) coordinate is the closest to the anchor point so far).

  Parameters:
    `crosshairState` - the crosshair state (`null` permitted, but the method does nothing in that case).
    `x` - the x-value (in data space).
    `y` - the y-value (in data space).
    `transX` - the x-value translated to Java2D space.
    `transY` - the y-value translated to Java2D space.
    `orientation` - the plot orientation (`null` not permitted).

### drawItemLabel

    protected void drawItemLabel(java.awt.Graphics2D g2,
                                 PlotOrientation orientation,
                                 XYDataset dataset,
                                 int series,
                                 int item,
                                 double x,
                                 double y,
                                 boolean negative)

  Draws an item label.

  Parameters:
    `g2` - the graphics device.
    `orientation` - the orientation.
    `dataset` - the dataset.
    `series` - the series index (zero-based).
    `item` - the item index (zero-based).
    `x` - the x coordinate (in Java2D space).
    `y` - the y coordinate (in Java2D space).
    `negative` - indicates a negative value (which affects the item label position).

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