[Wayland-bugs] [Bug 774148] Gtk.Popover misplacement in Wayland

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774148

Olivier Fourdan <ofourdan at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #344713|reviewed                    |none
             status|                            |
 Attachment #344713|0                           |1
        is obsolete|                            |

--- Comment #7 from Olivier Fourdan <ofourdan at redhat.com> ---
Created attachment 345232
  --> https://bugzilla.gnome.org/attachment.cgi?id=345232&action=edit
[PATCH] gdkwindow: subsurface in gdk_window_get_effective_parent()

When the GtkWidget hierarchy does not match the GdkWindow hierarchy, the
GtkWidget code may find a common ancestor that cannot be found while
traversing the GdkWindow tree using gdk_window_get_effective_parent().

This happens with for example on Wayland, a GtkPopover has another
GtkPopover as parent, in this case, the GdkWindow parent is the root
window, whereas the GtkWidget parent is the other GtkPopover.

That confuses the gtk_widget_translate_coordinates() logic which will
bail out in this case and won't return the translated coordinates.

Make gdk_window_get_effective_parent() aware of subsurfaces and use the
transient_for which represents the actual parent (whereas the parent
might be pointing to the root window).

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