ScrollEvent 继承自： Event[EventControlType]

The pointer issued a scroll event.

属性

名称	类型	默认值	说明
local_position	Offset	metadata={'data_field': 'l'}	The coordinate of the position of the pointer, in logical pixels in the local coordinate space.
global_position	Offset	metadata={'data_field': 'g'}	The coordinate of the position of the pointer, in logical pixels in the global coordinate space.
scroll_delta	Offset	metadata={'data_field': 'sd'}	The amount to scroll, in logical pixels.