[Wayland-bugs] [Bug 776225] [wayland] dropdown placed somewhere in the screen

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=776225

--- Comment #2 from Olivier Fourdan <ofourdan at redhat.com> ---
Quick update, to reproduce, one needs to have combo inside a popover, which is
not so common but can be found in recipes at commit c127b94.

The problem is that gtk_menu_position() will position the menu relative to the
widget using the widget's window, but when it's inside a popover, the popover
is itself a subsurface, and the popover relative position is not taken into
account.

In other words, the menu is placed relative to the widget location but applied
to the toplevel window, not the actual subsurface when using a popover.

Not sure how to fix this though...

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