java.lang.Object
- uk.ac.starlink.ttools.plot2.layer.AbstractPlotter<SpotPlotter.SpotStyle>
- - uk.ac.starlink.ttools.plot2.layer.SpotPlotter

All Implemented Interfaces:

Plotter<SpotPlotter.SpotStyle>
```
public class SpotPlotter
extends AbstractPlotter<SpotPlotter.SpotStyle>
```
Fairly minimal example plotter implementation. It paints a fixed-size marker, for which the only style configuration option is colour. Admittedly, it's not all that simple.
This implements most of the required interfaces more or less from scratch to show what's going on. Reusing infrastructure from some other existing plotters (e.g. subclassing ShapeForm) may be more sensible where appropriate.

Since:

17 Feb 2013

Author:

Mark Taylor

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`SpotPlotter.SpotLayerType`	LayerType corresponding to SpotPlotter.
`static class`	`SpotPlotter.SpotStyle`	Style implementation for spots.

Constructor Summary

Constructors
Constructor Description

SpotPlotter()
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`PlotLayer`	`createLayer(DataGeom geom, DataSpec dataSpec, SpotPlotter.SpotStyle style)`	Creates a PlotLayer based on the given geometry, data and style.
`SpotPlotter.SpotStyle`	`createStyle(ConfigMap config)`	Creates a style that can be used when creating a plot layer.
`java.lang.String`	`getPlotterDescription()`	Returns an XML description of this plotter.
`ConfigKey<?>[]`	`getStyleKeys()`	Returns the configuration keys used to configure style for this plotter.

Methods inherited from class uk.ac.starlink.ttools.plot2.layer.AbstractPlotter
getCoordGroup, getPlotterIcon, getPlotterName, hasReports

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SpotPlotter
```
public SpotPlotter()
```
    Constructor.
- Method Detail
  - getPlotterDescription
```
public java.lang.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(uk.ac.starlink.ttools.plot2.config.ConfigMap) method.
    
    Returns:
    
    keys used when creating a style for this plotter.
  - createStyle
```
public SpotPlotter.SpotStyle createStyle(ConfigMap config)
```
    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(uk.ac.starlink.ttools.plot2.DataGeom, uk.ac.starlink.ttools.plot2.data.DataSpec, S).
    
    Parameters:
    
    config - map of style configuration items
    
    Returns:
    
    plotter-specific plot style
  - createLayer
```
public PlotLayer createLayer(DataGeom geom,
                             DataSpec dataSpec,
                             SpotPlotter.SpotStyle 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(uk.ac.starlink.ttools.plot2.config.ConfigMap).
    The dataSpec parameter must contain the coordinates defined by this plotter's CoordGroup.
    The pointDataGeom parameter is only used if getCoordGroup(). getPositionCount returns 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:
    
    geom - indicates base position coordinates and their mapping to points in the data space; if non-null, the data geom's DataGeom.hasPosition() method will return true
    
    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

Class SpotPlotter

Nested Class Summary

Constructor Summary

Method Summary

Methods inherited from class uk.ac.starlink.ttools.plot2.layer.AbstractPlotter

Methods inherited from class java.lang.Object

Constructor Detail

SpotPlotter

Method Detail

getPlotterDescription

getStyleKeys

createStyle

createLayer