Emitted when a pointer or keyboard grab on a window belonging
to @widget gets broken.
On X11, this happens when the grab window becomes unviewable
(i.e. it or one of its ancestors is unmapped), or if the same
application grabs the pointer or keyboard again.
Emitted when a pointer or keyboard grab on a window belonging to @widget gets broken.
On X11, this happens when the grab window becomes unviewable (i.e. it or one of its ancestors is unmapped), or if the same application grabs the pointer or keyboard again.