[wxPython-users] Re: Trouble with drawing, I need some ideas :)

[Chris.Barker at noaa.gov]

Robin Dunn wrote:
> The key point is to draw the expensive things as few times as possible, 
> and that means drawing them to a bitmap and then just blitting thhe 
> bitmap. 

This is exactly what FloatCanvas does -- you can put objects on the 
background (the default), or the foreground. When something changes on 
the foreground,the background is blitted, then the foreground objects 
are re-drawn. This works well, as usually, there are only a few things 
that are changing.

You may want to give FloatCanvas a try -- this is all done for you 
already. It's not using GraphicsContext now, but you can write your own 
DrawObjects that do use GraphicsContext if you want. Someone's put a 
Wiki page up about this:

http://morticia.cs.dal.ca/FloatCanvas/wiki/SmoothLines

-Chris



-- 
Christopher Barker, Ph.D.
Oceanographer

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Chris.Barker at noaa.gov