gdk/gdk.go
func (v *EventMotion) State() ModifierType {
	c := v.native().state
	return ModifierType(c)
}
func (v *EventMotion) State() ModifierType {
	c := v.native().state
	return ModifierType(c)
}
// A bit-mask representing the state of the modifier keys (e.g. Control, Shift
// and Alt) and the pointer buttons. See gdk.ModifierType constants.