ScrollEvent
ScrollEvent class has the following properties:
global_x
 The x component of the global position of the pointer.
global_y
 The y component of the global position of the pointer.
local_x
 The x component of the local position of the pointer.
local_y
 The y component of the local position of the pointer.
scroll_delta_x
 The x component of the the amount to scroll, in logical pixels.
scroll_delta_y
 The y component of the the amount to scroll, in logical pixels.