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astGetGrfContext
-
Return the KeyMap that describes a Plot's graphics context
- Description:
- This function
returns a reference to a KeyMap that will be passed to any drawing
functions registered using astGrfSet.
This KeyMap can be used by an application to pass information to
the drawing functions
about the context in which they are being called. The contents of
the KeyMap are never accessed byt the Plot class itself.
- Synopsis:
- AstKeyMap
astGetGrfContext( AstPlot
this )
- Parameters:
-
this
-
Pointer to the Plot.
- Returned Value:
-
astGetGrfContext()
-
A pointer to the graphics context KeyMap. The returned pointer
should be annulled when it is no longer needed.
Next: astGetMapping - Obtain a Mapping that converts between two Frames in a FrameSet
Up: AST Function Descriptions
Previous: astGetFrame - Obtain a pointer to a specified Frame in a FrameSet
AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk
Copyright (C) 2009 Science \& Technology Facilities Council