[wxhaskell-users] "on paint" clears my DC

[Lennart K. <kol...@dt...>]

Hi all!
I'm doing an animation with lines, it's part of my lab:
http://www.cs.chalmers.se/Cs/Grundutb/Kurser/afp/lab1.html

I have set a "on paint" property on a panel to draw all lines on every
repaint. This solution is not good since I update the lines every 50ms, i=
t
gets terrible slow.
Somehow I would like to save the animation frame I have got so far and
just add some lines on every tick.
I noticed there is a drawBitmap function but I have not found a way to
draw lines on a Bitmap. I have also found the Image type but it's the sam=
e
problem there.

Any ideas?

Thank you for yor help,
Lennart Kolmodin