gboolean gdk_event_is_scroll_stop_event ( const GdkEvent* event )
Check whether a scroll event is a stop scroll event. Scroll sequences with smooth scroll information may provide a stop scroll event once the interaction with the device finishes, e.g. by lifting a finger. This stop scroll event is the signal that a widget may trigger kinetic scrolling based on the current velocity.
Stop scroll events always have a a delta of 0/0.