A horizontal or vertical bar, which can be moved inside its parent.
Parameters: LandWidget * handle, bool update_target
If update_target is set, then the target is updated from the scrollbar. Else the scrollbar adjusts to the target’s scrolled position.
Parameters: LandWidget * self
Parameters: LandWidget * handle
Parameters: LandWidget * parent, LandWidget * target, int vertical, int x, int y, int w, int h
Returns: LandWidget*
no parameters