Controller Swipe Direction

Ok, on to the next issue....
Does anybody know how to determine the swipe direction of the controller?

Oculus provides values to interrogate
e.g
Swipe down = OVRInput.GetUp(OVRInput.RawButton.DpadDown)
Swipe left = OVRInput.GetUp(OVRInput.RawButton.DpadLeft)

Pico also provides values to interrogate
e.g.
SwipeDirection swipeDirection = Controller.UPvr_GetSwipeDirection(0);
Swipe down = SwipeDirection.SwipeDown
Swipe left = SwipeDirection.SwipeLeft

But MiVR appears to simply provide a touch position on the ClickButton which means you have to determine when it is first touched (InputManager.ControllerState.TouchDown), and get the InputManager.ControllerState.TouchPosition then when the touch is released (InputManager.ControllerState.TouchUp) get the InputManager.ControllerState.TouchPosition and then try and calculate the drirection between the two points...!

Surely I've missed something here and there is an easier way to do this?
Using Mi VR SDK for Unity 1.8.7

Cheers

 

Meant to update - ended up having to determine based on the position the touch was first made (InputManager.ControllerState.TouchDown) and the position the touch was removed (InputManager.ControllerState.TouchUp) using InputManager.ControllerState.TouchPosition in an Update() method.

I had to reset these values on Touch clicks i.e. InputManager.ControllerState.ClickButtonDown or InputManager.ControllerState.ClickButtonUp.

Some sample code for those interested:

Code (CSharp):

1.            
2.             if (InputManager.ControllerState.ClickButtonDown || InputManager.ControllerState.ClickButtonUp)
3.             {
4.                 // On click reset
5.                 tchDown = Vector2.zero;
6.                 tchUp = Vector2.zero;
7.                 swipeUp = false;
8.                 swipeDown = false;
9.                 swipeLeft = false;
10.                 swipeRight = false;
11.             }
12.             else if (InputManager.ControllerState.TouchDown)
13.             {
14.                 tchDown = InputManager.ControllerState.TouchPosition;
15.             }
16.             else if (InputManager.ControllerState.TouchUp)
17.             {
18.                 tchUp = InputManager.ControllerState.TouchPosition;
19.                 //
20.                 // Touch must start and end on the edges (0.2 leeway)
21.                 //
22.                 if (tchDown.x > 0.8 && tchUp.x < 0.2)
23.                     swipeLeft = true;
24.                 else if (tchUp.x > 0.8 && tchDown.x < 0.2)
25.                     swipeRight = true;
26.                 else if (tchDown.y > 0.8 && tchUp.y < 0.2)
27.                     swipeDown = true;
28.                 else if (tchUp.y > 0.8 && tchDown.y < 0.2 && !(tchDown == Vector2.zero))
29.                     swipeUp = true;
30.                 else
31.                 {
32.                     swipeUp = false;
33.                     swipeDown = false;
34.                     swipeLeft = false;
35.                     swipeRight = false;
36.                 }
37.            }
38.