BoxAndWhiskerRenderer

java.lang.Object
- org.jfree.chart.renderer.AbstractRenderer
- - org.jfree.chart.renderer.category.AbstractCategoryItemRenderer
  - - org.jfree.chart.renderer.category.BoxAndWhiskerRenderer

All Implemented Interfaces:

Serializable, Cloneable, LegendItemSource, CategoryItemRenderer, org.jfree.util.PublicCloneable
```
public class BoxAndWhiskerRenderer
extends AbstractCategoryItemRenderer
implements Cloneable, org.jfree.util.PublicCloneable, Serializable
```
A box-and-whisker renderer. This renderer requires a BoxAndWhiskerCategoryDataset and is for use with the CategoryPlot class. The example shown here is generated by the BoxAndWhiskerChartDemo1.java program included in the JFreeChart Demo Collection:

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

Constructors
Constructor and Description

BoxAndWhiskerRenderer()
Default constructor.

Constructors
Constructor and Description
`BoxAndWhiskerRenderer()` Default constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`drawHorizontalItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column)` Draws the visual representation of a single data item when the plot has a horizontal orientation.
`void`	`drawItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column, int pass)` Draw a single data item.
`void`	`drawVerticalItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column)` Draws the visual representation of a single data item when the plot has a vertical orientation.
`boolean`	`equals(Object obj)` Tests this renderer for equality with an arbitrary object.
`Range`	`findRangeBounds(CategoryDataset dataset)` Returns the range of values from the specified dataset that the renderer will require to display all the data.
`Paint`	`getArtifactPaint()` Returns the paint used to color the median and average markers.
`boolean`	`getFillBox()` Returns the flag that controls whether or not the box is filled.
`double`	`getItemMargin()` Returns the item margin.
`LegendItem`	`getLegendItem(int datasetIndex, int series)` Returns a legend item for a series.
`double`	`getMaximumBarWidth()` Returns the maximum bar width as a percentage of the available drawing space.
`boolean`	`getUseOutlinePaintForWhiskers()` Returns the flag that, if `true`, causes the whiskers to be drawn using the series outline paint.
`double`	`getWhiskerWidth()` Returns the width of the whiskers as fraction of the bar width.
`CategoryItemRendererState`	`initialise(Graphics2D g2, Rectangle2D dataArea, CategoryPlot plot, int rendererIndex, PlotRenderingInfo info)` Initialises the renderer.
`boolean`	`isMeanVisible()` Returns the flag that controls whether or not the mean indicator is draw for each item.
`boolean`	`isMedianVisible()` Returns the flag that controls whether or not the median indicator is draw for each item.
`void`	`setArtifactPaint(Paint paint)` Sets the paint used to color the median and average markers and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setFillBox(boolean flag)` Sets the flag that controls whether or not the box is filled and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setItemMargin(double margin)` Sets the item margin and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setMaximumBarWidth(double percent)` Sets the maximum bar width, which is specified as a percentage of the available space for all bars, and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setMeanVisible(boolean visible)` Sets the flag that controls whether or not the mean indicator is drawn for each item, and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setMedianVisible(boolean visible)` Sets the flag that controls whether or not the median indicator is drawn for each item, and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setUseOutlinePaintForWhiskers(boolean flag)` Sets the flag that, if `true`, causes the whiskers to be drawn using the series outline paint, and sends a `RendererChangeEvent` to all registered listeners.
`void`	`setWhiskerWidth(double width)` Sets the width of the whiskers as a fraction of the bar width and sends a `RendererChangeEvent` to all registered listeners.

Methods inherited from class org.jfree.chart.renderer.category.AbstractCategoryItemRenderer
clone, drawBackground, drawDomainGridline, drawDomainMarker, drawOutline, drawRangeGridline, drawRangeLine, drawRangeMarker, getBaseItemLabelGenerator, getBaseItemURLGenerator, getBaseToolTipGenerator, getColumnCount, getDrawingSupplier, getItemLabelGenerator, getItemMiddle, getItemURLGenerator, getLegendItemLabelGenerator, getLegendItems, getLegendItemToolTipGenerator, getLegendItemURLGenerator, getPassCount, getPlot, getRowCount, getSeriesItemLabelGenerator, getSeriesItemURLGenerator, getSeriesToolTipGenerator, getToolTipGenerator, getToolTipGenerator, hashCode, setBaseItemLabelGenerator, setBaseItemURLGenerator, setBaseToolTipGenerator, setItemLabelGenerator, setItemURLGenerator, setLegendItemLabelGenerator, setLegendItemToolTipGenerator, setLegendItemURLGenerator, setPlot, setSeriesItemLabelGenerator, setSeriesItemURLGenerator, setSeriesToolTipGenerator, setToolTipGenerator

Methods inherited from class org.jfree.chart.renderer.AbstractRenderer
addChangeListener, clearSeriesPaints, clearSeriesStrokes, getAutoPopulateSeriesFillPaint, getAutoPopulateSeriesOutlinePaint, getAutoPopulateSeriesOutlineStroke, getAutoPopulateSeriesPaint, getAutoPopulateSeriesShape, getAutoPopulateSeriesStroke, getBaseCreateEntities, getBaseFillPaint, getBaseItemLabelFont, getBaseItemLabelPaint, getBaseItemLabelsVisible, getBaseLegendShape, getBaseLegendTextFont, getBaseLegendTextPaint, getBaseNegativeItemLabelPosition, getBaseOutlinePaint, getBaseOutlineStroke, getBasePaint, getBasePositiveItemLabelPosition, getBaseSeriesVisible, getBaseSeriesVisibleInLegend, getBaseShape, getBaseStroke, getCreateEntities, getDataBoundsIncludesVisibleSeriesOnly, getDefaultEntityRadius, getItemCreateEntity, getItemFillPaint, getItemLabelAnchorOffset, getItemLabelFont, getItemLabelFont, getItemLabelPaint, getItemLabelPaint, getItemOutlinePaint, getItemOutlineStroke, getItemPaint, getItemShape, getItemStroke, getItemVisible, getLegendShape, getLegendTextFont, getLegendTextPaint, getNegativeItemLabelPosition, getNegativeItemLabelPosition, getPositiveItemLabelPosition, getPositiveItemLabelPosition, getSeriesCreateEntities, getSeriesFillPaint, getSeriesItemLabelFont, getSeriesItemLabelPaint, getSeriesNegativeItemLabelPosition, getSeriesOutlinePaint, getSeriesOutlineStroke, getSeriesPaint, getSeriesPositiveItemLabelPosition, getSeriesShape, getSeriesStroke, getSeriesVisible, getSeriesVisible, getSeriesVisibleInLegend, getSeriesVisibleInLegend, hasListener, isItemLabelVisible, isSeriesItemLabelsVisible, isSeriesVisible, isSeriesVisibleInLegend, lookupLegendShape, lookupLegendTextFont, lookupLegendTextPaint, lookupSeriesFillPaint, lookupSeriesOutlinePaint, lookupSeriesOutlineStroke, lookupSeriesPaint, lookupSeriesShape, lookupSeriesStroke, notifyListeners, removeChangeListener, setAutoPopulateSeriesFillPaint, setAutoPopulateSeriesOutlinePaint, setAutoPopulateSeriesOutlineStroke, setAutoPopulateSeriesPaint, setAutoPopulateSeriesShape, setAutoPopulateSeriesStroke, setBaseCreateEntities, setBaseCreateEntities, setBaseFillPaint, setBaseFillPaint, setBaseItemLabelFont, setBaseItemLabelFont, setBaseItemLabelPaint, setBaseItemLabelPaint, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseLegendShape, setBaseLegendTextFont, setBaseLegendTextPaint, setBaseNegativeItemLabelPosition, setBaseNegativeItemLabelPosition, setBaseOutlinePaint, setBaseOutlinePaint, setBaseOutlineStroke, setBaseOutlineStroke, setBasePaint, setBasePaint, setBasePositiveItemLabelPosition, setBasePositiveItemLabelPosition, setBaseSeriesVisible, setBaseSeriesVisible, setBaseSeriesVisibleInLegend, setBaseSeriesVisibleInLegend, setBaseShape, setBaseShape, setBaseStroke, setBaseStroke, setCreateEntities, setCreateEntities, setDataBoundsIncludesVisibleSeriesOnly, setDefaultEntityRadius, setFillPaint, setFillPaint, setItemLabelAnchorOffset, setItemLabelFont, setItemLabelFont, setItemLabelPaint, setItemLabelPaint, setItemLabelsVisible, setItemLabelsVisible, setItemLabelsVisible, setLegendShape, setLegendTextFont, setLegendTextPaint, setNegativeItemLabelPosition, setNegativeItemLabelPosition, setOutlinePaint, setOutlinePaint, setOutlineStroke, setOutlineStroke, setPaint, setPaint, setPositiveItemLabelPosition, setPositiveItemLabelPosition, setSeriesCreateEntities, setSeriesCreateEntities, setSeriesFillPaint, setSeriesFillPaint, setSeriesItemLabelFont, setSeriesItemLabelFont, setSeriesItemLabelPaint, setSeriesItemLabelPaint, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesItemLabelsVisible, setSeriesNegativeItemLabelPosition, setSeriesNegativeItemLabelPosition, setSeriesOutlinePaint, setSeriesOutlinePaint, setSeriesOutlineStroke, setSeriesOutlineStroke, setSeriesPaint, setSeriesPaint, setSeriesPositiveItemLabelPosition, setSeriesPositiveItemLabelPosition, setSeriesShape, setSeriesShape, setSeriesStroke, setSeriesStroke, setSeriesVisible, setSeriesVisible, setSeriesVisible, setSeriesVisible, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setShape, setShape, setStroke, setStroke

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

Methods inherited from interface org.jfree.util.PublicCloneable
clone

Methods inherited from interface org.jfree.chart.renderer.category.CategoryItemRenderer
addChangeListener, getBaseItemLabelFont, getBaseItemLabelPaint, getBaseItemLabelsVisible, getBaseNegativeItemLabelPosition, getBaseOutlinePaint, getBaseOutlineStroke, getBasePaint, getBasePositiveItemLabelPosition, getBaseSeriesVisible, getBaseSeriesVisibleInLegend, getBaseShape, getBaseStroke, getItemLabelFont, getItemLabelFont, getItemLabelPaint, getItemLabelPaint, getItemOutlinePaint, getItemOutlineStroke, getItemPaint, getItemShape, getItemStroke, getItemVisible, getNegativeItemLabelPosition, getNegativeItemLabelPosition, getPositiveItemLabelPosition, getPositiveItemLabelPosition, getSeriesItemLabelFont, getSeriesItemLabelPaint, getSeriesNegativeItemLabelPosition, getSeriesOutlinePaint, getSeriesOutlineStroke, getSeriesPaint, getSeriesPositiveItemLabelPosition, getSeriesShape, getSeriesStroke, getSeriesVisible, getSeriesVisible, getSeriesVisibleInLegend, getSeriesVisibleInLegend, isItemLabelVisible, isSeriesItemLabelsVisible, isSeriesVisible, isSeriesVisibleInLegend, removeChangeListener, setBaseItemLabelFont, setBaseItemLabelPaint, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseItemLabelsVisible, setBaseNegativeItemLabelPosition, setBaseNegativeItemLabelPosition, setBaseOutlinePaint, setBaseOutlineStroke, setBasePaint, setBasePositiveItemLabelPosition, setBasePositiveItemLabelPosition, setBaseSeriesVisible, setBaseSeriesVisible, setBaseSeriesVisibleInLegend, setBaseSeriesVisibleInLegend, 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, setSeriesVisible, setSeriesVisible, setSeriesVisible, setSeriesVisible, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setSeriesVisibleInLegend, setShape, setStroke

- Constructor Detail
  - BoxAndWhiskerRenderer
```
public BoxAndWhiskerRenderer()
```
    Default constructor.
- Method Detail
  - getArtifactPaint
```
public Paint getArtifactPaint()
```
    Returns the paint used to color the median and average markers.
    
    Returns:
    
    The paint used to draw the median and average markers (never null).
    
    See Also:
    
    setArtifactPaint(Paint)
  - setArtifactPaint
```
public void setArtifactPaint(Paint paint)
```
    Sets the paint used to color the median and average markers and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    paint - the paint (null not permitted).
    
    See Also:
    
    getArtifactPaint()
  - getFillBox
```
public boolean getFillBox()
```
    Returns the flag that controls whether or not the box is filled.
    
    Returns:
    
    A boolean.
    
    See Also:
    
    setFillBox(boolean)
  - setFillBox
```
public void setFillBox(boolean flag)
```
    Sets the flag that controls whether or not the box is filled and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    flag - the flag.
    
    See Also:
    
    getFillBox()
  - getItemMargin
```
public double getItemMargin()
```
    Returns the item margin. This is a percentage of the available space that is allocated to the space between items in the chart.
    
    Returns:
    
    The margin.
    
    See Also:
    
    setItemMargin(double)
  - setItemMargin
```
public void setItemMargin(double margin)
```
    Sets the item margin and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    margin - the margin (a percentage).
    
    See Also:
    
    getItemMargin()
  - getMaximumBarWidth
```
public double getMaximumBarWidth()
```
    Returns the maximum bar width as a percentage of the available drawing space. Take care with the encoding, for example 0.10 is ten percent.
    
    Returns:
    
    The maximum bar width.
    
    Since:
    
    1.0.10
    
    See Also:
    
    setMaximumBarWidth(double)
  - setMaximumBarWidth
```
public void setMaximumBarWidth(double percent)
```
    Sets the maximum bar width, which is specified as a percentage of the available space for all bars, and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    percent - the maximum bar width (a percentage, where 0.10 is ten percent).
    
    Since:
    
    1.0.10
    
    See Also:
    
    getMaximumBarWidth()
  - isMeanVisible
```
public boolean isMeanVisible()
```
    Returns the flag that controls whether or not the mean indicator is draw for each item.
    
    Returns:
    
    A boolean.
    
    Since:
    
    1.0.13
    
    See Also:
    
    setMeanVisible(boolean)
  - setMeanVisible
```
public void setMeanVisible(boolean visible)
```
    Sets the flag that controls whether or not the mean indicator is drawn for each item, and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    visible - the new flag value.
    
    Since:
    
    1.0.13
    
    See Also:
    
    isMeanVisible()
  - isMedianVisible
```
public boolean isMedianVisible()
```
    Returns the flag that controls whether or not the median indicator is draw for each item.
    
    Returns:
    
    A boolean.
    
    Since:
    
    1.0.13
    
    See Also:
    
    setMedianVisible(boolean)
  - setMedianVisible
```
public void setMedianVisible(boolean visible)
```
    Sets the flag that controls whether or not the median indicator is drawn for each item, and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    visible - the new flag value.
    
    Since:
    
    1.0.13
    
    See Also:
    
    isMedianVisible()
  - getUseOutlinePaintForWhiskers
```
public boolean getUseOutlinePaintForWhiskers()
```
    Returns the flag that, if true, causes the whiskers to be drawn using the series outline paint.
    
    Returns:
    
    A boolean.
    
    Since:
    
    1.0.14
  - setUseOutlinePaintForWhiskers
```
public void setUseOutlinePaintForWhiskers(boolean flag)
```
    Sets the flag that, if true, causes the whiskers to be drawn using the series outline paint, and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    flag - the new flag value.
    
    Since:
    
    1.0.14
  - getWhiskerWidth
```
public double getWhiskerWidth()
```
    Returns the width of the whiskers as fraction of the bar width.
    
    Returns:
    
    The width of the whiskers.
    
    Since:
    
    1.0.14
    
    See Also:
    
    setWhiskerWidth(double)
  - setWhiskerWidth
```
public void setWhiskerWidth(double width)
```
    Sets the width of the whiskers as a fraction of the bar width and sends a RendererChangeEvent to all registered listeners.
    
    Parameters:
    
    width - a value between 0 and 1 indicating how wide the whisker is supposed to be compared to the bar.
    
    Since:
    
    1.0.14
    
    See Also:
    
    getWhiskerWidth(), CategoryItemRendererState.getBarWidth()
  - getLegendItem
```
public LegendItem getLegendItem(int datasetIndex,
                                int series)
```
    Returns a legend item for a series.
    
    Specified by:
    
    getLegendItem in interface CategoryItemRenderer
    
    Overrides:
    
    getLegendItem in class AbstractCategoryItemRenderer
    
    Parameters:
    
    datasetIndex - the dataset index (zero-based).
    
    series - the series index (zero-based).
    
    Returns:
    
    The legend item (possibly null).
    
    See Also:
    
    AbstractCategoryItemRenderer.getLegendItems()
  - findRangeBounds
```
public Range findRangeBounds(CategoryDataset dataset)
```
    Returns the range of values from the specified dataset that the renderer will require to display all the data.
    
    Specified by:
    
    findRangeBounds in interface CategoryItemRenderer
    
    Overrides:
    
    findRangeBounds in class AbstractCategoryItemRenderer
    
    Parameters:
    
    dataset - the dataset.
    
    Returns:
    
    The range.
  - initialise
```
public CategoryItemRendererState initialise(Graphics2D g2,
                                            Rectangle2D dataArea,
                                            CategoryPlot plot,
                                            int rendererIndex,
                                            PlotRenderingInfo info)
```
    Initialises the renderer. This method gets called once at the start of the process of drawing a chart.
    
    Specified by:
    
    initialise in interface CategoryItemRenderer
    
    Overrides:
    
    initialise in class AbstractCategoryItemRenderer
    
    Parameters:
    
    g2 - the graphics device.
    
    dataArea - the area in which the data is to be plotted.
    
    plot - the plot.
    
    rendererIndex - the renderer index.
    
    info - collects chart rendering information for return to caller.
    
    Returns:
    
    The renderer state.
  - drawItem
```
public void drawItem(Graphics2D g2,
                     CategoryItemRendererState state,
                     Rectangle2D dataArea,
                     CategoryPlot plot,
                     CategoryAxis domainAxis,
                     ValueAxis rangeAxis,
                     CategoryDataset dataset,
                     int row,
                     int column,
                     int pass)
```
    Draw a single data item.
    
    Specified by:
    
    drawItem in interface CategoryItemRenderer
    
    Parameters:
    
    g2 - the graphics device.
    
    state - the renderer state.
    
    dataArea - the area in which the data is drawn.
    
    plot - the plot.
    
    domainAxis - the domain axis.
    
    rangeAxis - the range axis.
    
    dataset - the data (must be an instance of BoxAndWhiskerCategoryDataset).
    
    row - the row index (zero-based).
    
    column - the column index (zero-based).
    
    pass - the pass index.
  - drawHorizontalItem
```
public void drawHorizontalItem(Graphics2D g2,
                               CategoryItemRendererState state,
                               Rectangle2D dataArea,
                               CategoryPlot plot,
                               CategoryAxis domainAxis,
                               ValueAxis rangeAxis,
                               CategoryDataset dataset,
                               int row,
                               int column)
```
    Draws the visual representation of a single data item when the plot has a horizontal orientation.
    
    Parameters:
    
    g2 - the graphics device.
    
    state - the renderer state.
    
    dataArea - the area within which the plot is being drawn.
    
    plot - the plot (can be used to obtain standard color information etc).
    
    domainAxis - the domain axis.
    
    rangeAxis - the range axis.
    
    dataset - the dataset (must be an instance of BoxAndWhiskerCategoryDataset).
    
    row - the row index (zero-based).
    
    column - the column index (zero-based).
  - drawVerticalItem
```
public void drawVerticalItem(Graphics2D g2,
                             CategoryItemRendererState state,
                             Rectangle2D dataArea,
                             CategoryPlot plot,
                             CategoryAxis domainAxis,
                             ValueAxis rangeAxis,
                             CategoryDataset dataset,
                             int row,
                             int column)
```
    Draws the visual representation of a single data item when the plot has a vertical orientation.
    
    Parameters:
    
    g2 - the graphics device.
    
    state - the renderer state.
    
    dataArea - the area within which the plot is being drawn.
    
    plot - the plot (can be used to obtain standard color information etc).
    
    domainAxis - the domain axis.
    
    rangeAxis - the range axis.
    
    dataset - the dataset (must be an instance of BoxAndWhiskerCategoryDataset).
    
    row - the row index (zero-based).
    
    column - the column index (zero-based).
  - equals
```
public boolean equals(Object obj)
```
    Tests this renderer for equality with an arbitrary object.
    
    Overrides:
    
    equals in class AbstractCategoryItemRenderer
    
    Parameters:
    
    obj - the object (null permitted).
    
    Returns:
    
    true or false.

Class BoxAndWhiskerRenderer

Field Summary

Fields inherited from class org.jfree.chart.renderer.AbstractRenderer

Constructor Summary

Method Summary

Methods inherited from class org.jfree.chart.renderer.category.AbstractCategoryItemRenderer

Methods inherited from class org.jfree.chart.renderer.AbstractRenderer

Methods inherited from class java.lang.Object

Methods inherited from interface org.jfree.util.PublicCloneable

Methods inherited from interface org.jfree.chart.renderer.category.CategoryItemRenderer

Constructor Detail

BoxAndWhiskerRenderer

Method Detail

getArtifactPaint

setArtifactPaint

getFillBox

setFillBox

getItemMargin

setItemMargin

getMaximumBarWidth

setMaximumBarWidth

isMeanVisible

setMeanVisible

isMedianVisible

setMedianVisible

getUseOutlinePaintForWhiskers

setUseOutlinePaintForWhiskers

getWhiskerWidth

setWhiskerWidth

getLegendItem

findRangeBounds

initialise

drawItem

drawHorizontalItem

drawVerticalItem

equals