[wxPython-users] Re: double buffering

[Christopher Barker]

Eli Golovinsky wrote:
> The reason for double buffering in my code wasn't to prevent flicker. It 
> was to make sure the entire rect of the window is actually painted over 
> with something and the easiest (though maybe not the fastest) way to do 
> that is create an EmptyBitmap the size of the window, draw on it and 
> Blit it to the screen.

Another reason to Double buffer is to keep form having to re-draw 
everything every time the window needs updating. To accomplish that, you 
need to keep the bitmap around, and only re-draw it when it needs to 
change. Your Paint handler then only needs to blit the bitmap to the screen.

see:

http://wiki.wxpython.org/index.cgi/DoubleBufferedDrawing

-Chris

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Christopher Barker, Ph.D.
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