[plt-scheme] Question on Canvas object in GUI programming

From: Lian DanHui (linda.lian at gmail.com)
Date: Tue Dec 18 05:08:54 EST 2007


I want to implement something like this:
  1. Display a picture in a Canvas on a Frame;
  2. User can click on the picture;
  3. I want to get the color of the pixel that user clicked;

For Canvas object,  Using what method or what strategy, that I can get the
pixel info?
Thanks a lot for the help!

best regards,
Linda Lian
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