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.
TRUE to stop other handlers from being invoked for
the event. FALSE to propagate the event further.
Since 2.8
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. TRUE to stop other handlers from being invoked for the event. FALSE to propagate the event further. Since 2.8