Wraps http://docs.oracle.com/javafx/2/api/javafx/scene/input/ScrollEvent.HorizontalTextScrollUnits.html
Wraps http://docs.oracle.com/javafx/2/api/javafx/scene/input/ScrollEvent.VerticalTextScrollUnits.html
Common supertype for all scroll event types.
This event occurs when user performs a scrolling action such as rotating mouse wheel or dragging a finger over touch screen.
This event occurs when a scrolling gesture ends.
This event occurs when a scrolling gesture is detected.