[plt-scheme] Using a canvas% and its dc<%>

Akiva Kleiman wrote:

> Little window, with a canvas in it, and it draws a red circle, filled
> with white; less then a second later, though, the entire window is
> filled with white, and my circle is nowhere to be found.
> What could be the problem?

Deja vu. I had the same problem until Robby showed me the solution:

http://www.cs.utah.edu/plt/mailarch/plt-scheme-2002/msg00288.html

--
Jens Axel Søgaard