Ev.WheelWheel events.
module Delta_mode : sig ... endDelta unit specification.
The type for WheelEvent objects.
val delta_x : t -> floatdelta_x w is the amount to be scrolled on the x-axis.
val delta_y : t -> floatdelta_x w is the amount to be scrolled on the y-axis.
val delta_z : t -> floatdelta_z w is the amount to be scrolled on the z-axis.
val delta_mode : t -> Delta_mode.t