next up previous 264
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


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 up previous 264
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