onEnd property
A pointer that was previously in contact with the screen with a primary button and moving is no longer in contact with the screen and was moving at a specific velocity when it stopped contacting the screen.
The velocity is provided in the callback's details argument, which is a
DragEndDetails object.
See also:
- kPrimaryButton, the button this callback responds to.
 - DragEndDetails, which is passed as an argument to this callback.
 
Implementation
GestureDragEndCallback? onEnd;