> I'd probably render the whole lot in an fl_offscreen, to be honest, then
> in the display widget's draw method, I'd use=20
>
> fl_copy_offscreen(int x, int y, int w, int h, Fl_Offscreen osrc, int
> srcx, int srcy)
>
>  to copy the interesting parts of the offscreen onto the display.

Thanks a lot for the answer !

I will use the "offset drawing" method. It's a part of the tutorial I don't 
quite understand. Do you have some examples of how you would do that?
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