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On 11/26/20 11:31 PM Greg Ercolano wrote:
On 2020-11-26 13:37, Gonzalo Garramuño wrote:
El 26/11/20 a las 13:18, Greg Ercolano escribió:
Anyway, just a thought -- I'm not sure this would work and haven't tried any tests, just curious
if this sounds plausible/useful, or is just an unwanted can of worms or a malformed idea..
(see my other post about drawing coordinate transformations)
It sounds like a can of worms to me. You would then have to check on
people's code whether they are drawing relatively or not and same for
the events.
Well, all the drawing code goes through FLTK drawing functions, hence it
would be possible somehow, but not by means of the coordinate
transformation matrix.
I would vote a -1.
It's definitely too big a project for anything in the near future like
FLTK 1.4 IMHO.
<history> Matt had to deal with this in his attempt do combine FLTK 1
(absolute/window coordinates) and FLTK 2 (group relative coordinates) in
one system (FLTK 3) which didn't succeed, although I imagine that he had
solved the coordinate issue with some tricks...
</history>
Just curious; is that different from using Fl_Window as a subwindow?
Same behavior, just in an Fl_Group..
That's a *giant* difference. Fl_Group widgets are just containers of the
main window and all drawing primitives use the window coordinates which
are known to the OS. It's simple, Fast and Light.
Fl_Window's have their own coordinate systems because they are
represented by their own OS window objects.
This is true at least for X11 and Windows but I'm not sure if it's also
true for macOS. I believe it's not but Manolo can certainly tell us.
This means that a subwindow is no different than a main window WRT
drawing from FLTK's POV. The only difference is that the creator of
widgets (i.e. the programmer) needs to know which window is the
reference (coordinate 0,0) to position the widgets.
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