Class LabelPlotter

Method Details

• adjustGeom

  protected abstract DataGeom adjustGeom(DataGeom baseGeom)

  Provides a DataGeom to be used by the layer this form makes, given a DataGeom that characterises the plotting environment. The output should be similar to the input, for instance implementing the same plotType-specific DataGeom subtype.

  In most cases the supplied instance can be returned unchanged, but instances with special requirements may want to adjust how the data is interpreted.

  Parameters:

  baseGeom - context geom

  Returns:

  geom to use for data interpretation, the same or similar to the input

• getPlotterDescription

  public String getPlotterDescription()

  Description copied from interface: Plotter

  Returns an XML description of this plotter.

  Note: really this should appear at the LayerType level.

  Returns:

  one or more <p> elements

• getStyleKeys

  public ConfigKey<?>[] getStyleKeys()

  Description copied from interface: Plotter

  Returns the configuration keys used to configure style for this plotter. The keys in the return value are used in the map supplied to the Plotter.createStyle(ConfigMap) method.

  Returns:

  keys used when creating a style for this plotter.

• createStyle

  public LabelStyle createStyle(ConfigMap config) throws ConfigException

  Description copied from interface: Plotter

  Creates a style that can be used when creating a plot layer. The keys that are significant in the supplied config map are those returned by Plotter.getStyleKeys(). The return value can be used as input to Plotter.createLayer(DataGeom, DataSpec, S).

  Parameters:

  config - map of style configuration items

  Returns:

  plotter-specific plot style

  Throws:

  ConfigException

• createLayer

  public PlotLayer createLayer(DataGeom geom0, DataSpec dataSpec, LabelStyle style)

  Description copied from interface: Plotter

  Creates a PlotLayer based on the given geometry, data and style.

  The style parameter is the result of a call to Plotter.createStyle(ConfigMap).

  The dataSpec parameter must contain the coordinates defined by this plotter's CoordGroup.

  The pointDataGeom parameter is only used if the CoordGroup.getBasicPositionCount() or CoordGroup.getExtraPositionCount() method from this plotter's CoordGroup return a non-zero value, otherwise the plot does not have point positions.

  It is legal to supply null for any of the parameters; if insufficient data is supplied to generate a plot, then the method should return null.

  Creating a layer should be cheap; layers may be created and not used.

  Parameters:

  geom0 - indicates base position coordinates and their mapping to points in the data space

  dataSpec - specifies the data required for the plot

  style - data style as obtained from createStyle

  Returns:

  new plot layer, or null if no drawing will take place