Class FloatingCoordAuxReader

java.lang.Object
uk.ac.starlink.ttools.plot2.layer.FloatingCoordAuxReader
All Implemented Interfaces:
AuxReader

public class FloatingCoordAuxReader extends Object implements AuxReader
AuxReader implementation that extends ranges simply by sampling a given scalar floating coordinate for all plottable points.
Since:
16 Jan 2015
Author:
Mark Taylor
  • Constructor Details

    • FloatingCoordAuxReader

      public FloatingCoordAuxReader(FloatingCoord coord, int icol, DataGeom geom, boolean visibleOnly, Scaling scaling)
      Constructor.
      Parameters:
      coord - coordinate reader
      icol - column index in tuple sequence corresponding to value
      geom - converts data to graphics coordinates
      visibleOnly - true to include only points visible in the current plot bounds, false for all potentially plottable points
      scaling - scaling
  • Method Details

    • getCoordIndex

      public int getCoordIndex()
      Description copied from interface: AuxReader
      Returns the DataSpec index for the coordinate whose value is used by this reader. This is provided on a best-efforts basis; if no single coordinate fits this description, then -1 may be returned.
      Specified by:
      getCoordIndex in interface AuxReader
      Returns:
      DataSpec coord index for auxiliary coordinate being ranged, or -1
    • getAxisInfo

      public uk.ac.starlink.table.ValueInfo getAxisInfo(DataSpec dataSpec)
      Description copied from interface: AuxReader
      Attempts to provide information suitable for labelling the axis corresponding to the values ranged by this reader.
      Specified by:
      getAxisInfo in interface AuxReader
      Parameters:
      dataSpec - data specification
      Returns:
      info corresponding to this reader's scale, or null if none known
    • getScaling

      public Scaling getScaling()
      Description copied from interface: AuxReader
      Returns a scaling that will be used on the result of the aux ranging done by this reader, if any. If no scaler will be generated from the resulting Span (no special requirements on Span behaviour), then null may be returned.
      Specified by:
      getScaling in interface AuxReader
      Returns:
      aux scaling type, or null
    • adjustAuxRange

      public void adjustAuxRange(Surface surface, DataSpec dataSpec, DataStore dataStore, Object[] plans, Ranger ranger)
      Description copied from interface: AuxReader
      May use the supplied data specification to update (usually extend) the given range. If available an array of plan objects may be supplied as well. The implementation may be able to make use of these to improve efficiency of the ranging (perhaps to avoid a data scan).
      Specified by:
      adjustAuxRange in interface AuxReader
      Parameters:
      surface - plot data destination surface
      dataSpec - specification for data
      dataStore - data storage object
      plans - array of available plan objects; may be empty
      ranger - object to be updated with range information