Re: refreshing drawings

[Eli Barzilay <eli@CS.Cornell.EDU>]

On Mar 13, Patrick Hertelendy wrote:
> How can I refresh automatically drawings so that they dont disappear
> when another window is on them?

You should override the on-paint event.  The best-looking way is to
have a bitmap and do every drawing on it and on the window, then have
on-paint just copy this bitmap.  I think that .../collects/graphics
have some examples - look for sixlib-canvas% in graphicsr.ss or
plot-window% in turtlmr.ss.  I have some more examples for this if
you're interested...

-- 
          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
         http://www.cs.cornell.edu/eli/meaning.html        Maze is Life!