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[plt-scheme] The missing drawing context

From: Jens Axel Soegaard (jensaxel at soegaard.net)
Date: Thu Mar 19 16:48:26 EDT 2009		 
Robby Findler wrote:
> Oh, I think you have to wait and do the layout when you get the dc.
> I'm not remembering which callbacks inform you of that, but I think
> you should try get-extent and, if that fails, on-paint.


Ah! Thanks.

/Jens Axel
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