DragUpdateEvent 继承自： Event[EventControlType]

Incremental payload for drag progress updates.

属性

名称	类型	默认值	说明
local_position	Offset	metadata={'data_field': 'l'}	The local position in the coordinate system of the event receiver at which the pointer contacted the screen.
global_position	Offset	metadata={'data_field': 'g'}	The pointer's global position when it triggered this update.
local_delta	Optional[Offset]	None	The amount the pointer has moved in the local coordinate space of the event receiver since the start of the drag.
global_delta	Optional[Offset]	None	The amount the pointer has moved in the global coordinate space since the start of the drag.
primary_delta	Optional[float]	None	The amount the pointer has moved along the primary axis in the coordinate space of the event receiver since the previous update.
timestamp	Optional[Duration]	None	Recorded timestamp of the source pointer event that triggered the drag event. Could be None if triggered from proxied events such as accessibility.