On 28 Sep 2022, at 07:10, Manolo wrote:
> 
> Ian: could you, please, comment out line #141 of file examples/OpenGL3test.cxx to obtain
>     //Fl_Gl_Window::draw(); // Draw FLTK child widgets.
> and report here whether the GL3 scene draws correctly after that change?
> TIA.

OK - that works “as normal”, though of course there is no button drawn now. The button is still there though, as I can “click” it if I know where to press.

Also, more info about the “broken” state: Previously I noted that toggling from double-buffered to single-buffered caused the gradient square to appear and hid the button.
Any subsequent toggling of that always shows the gradient square, in either double or single-buffer display, but transiently as the scene is redrawn on each toggle, I can see the button being shown and there is a substantial flickering, as if the whole scene were drawn "in red with a button", then redrawn with the gradient square...


-- 
You received this message because you are subscribed to the Google Groups "fltk.coredev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to fltkcoredev+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/fltkcoredev/734FBFFA-3AD8-448A-ADC5-45F7730880D6%40gmail.com.