Hi Pierre,
The code draws a rectangle and a waveform. See: http://puredata.info/Members/fjkraan/software/cwavesel0.1/image_view.
That is all it does at the moment, it took a while to get some hang of the layer-technology. Currently I invalidate a layer and start by greating a new one. Is this the correct way, or are they reusable in a way?
Greetings,
Fred Jan