> > Might be worth trying with non-zero dimensions, just to see if that
> > makes any different here...
> >
> > e.g. try; MyWin() : T(5,5,90,90) {}
> >
>
> Works fine.
>
>
> A modified Fl_Double_Window.cxx works for me :
>
> in void Fl_Double_Window::flush(int eraseoverlay) {
>
> line 345-348 or near, I had a check on W() and H()
>
>
> #if defined(USE_X11) || defined(WIN32)
> myi->other_xid = ( w() && h() ? fl_create_offscreen(w(),
> h()) : 0 );
> clear_damage(FL_DAMAGE_ALL);
> #elif defined(__APPLE_QUARTZ__)
Hmm, I fear that will cause more problems than it solves...
"myi->other_xid" is subsequently used in several places without always
checking to see if it is NULL or not, so I worry that this will throw
other issues.
I think it would be better if we contrived to ensure that the offscreen
(which is used to simulate double-buffering) was never created with zero
size, which is why I suggested we try setting MyWin to a nonzero value
in my earlier post.
Creating 0 sized windows is a Bad Thing, in general. Does the tile demo
do that? I'm not at all familiar with the way in which the Fl_Tile logic
works...
I assume, from the codepath, that your X-server is not reporting that it
can support XDBE, and that is why you are seeing this problem.
I guess that these days, most testing happens on servers that do claim
to support XDBE so we go down the alternate codepath and never hit this
issue?
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