public virtual signal bool leave_notify_event (EventCrossing event)
The leave_notify_event will be emitted when the pointer leaves the
To receive this signal, the Window associated to the widget needs to enable the LEAVE_NOTIFY_MASK mask.
This signal will be sent to the grab widget if there is one.
the EventCrossing which triggered this signal.
true to stop other handlers from being invoked for the event. false to propagate the event further.