bug#31880: 26.1; VC mode line popup when clicked is off screen

[Robert Pluim]

martin rudalics <rudalics@gmx.at> writes:

>> I am using a high resolution display (built-in Retina display on a MacBook 
>> Pro).
>> I have the scaling set to 200%. When I change to 100%, the popup works fine. 
>> When
>> I change to LoDPI mode, the popup works fine. It definitely seems to be an 
>> issue
>> with scaled HiDPI.
>
> Thanks for the information.  Please keep 31880@debbugs.gnu.org cc'ed.
>
> Robert what do you think?  create_and_show_popup_menu has
>
> #ifdef HAVE_GTK3
>       /* Use window scaling factor to adjust position for hidpi screens. */
>       x /= xg_get_scale (f);
>       y /= xg_get_scale (f);
> #endif
>
> Shouldn't this take of Brian's problem?  If not, could you tell him
> how to debug this?

It should, but it doesnʼt. I see similar problems here, but I donʼt
understand why (unless this is another instance of "Mixing X and GTK
calls will bite your arse eventually").

GTK tooltips seem to appear in the right place, so Iʼll look for
inspiration there.

Robert