> I avoid calling myFl_GL_Window->draw() directly as this was not 
> recommended in many posts.

Yes, it is seldom (or never) a good idea to call draw() directly...


> How can I enshure the number of calls to draw() is a bit more 
> synchron 
> with coordinator_cb and all remaining events are flushed?

If you *really* need to force a redraw, then calling Fl::check(); after
you call redraw() can help - although it can also have an impact on cpu
load etc.


> Is it possible that callback timers get lost, beside omitting 
> repeat_timeout?

I don't think so - I haven't seen that, anyway (well, not in any recent
build, certainly 1.1.7 should be fine.)





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