UICamera.currentTouchID not returning right or middle mouse clicks

[Dizzley]

Like the title says

1.             if (UICamera.currentTouchID == -2)
2.             {
3.                 Debug.Log("rightclicked");
4.  
5.             }
6.             if (UICamera.currentTouchID == -1)
7.             {
8.                 Debug.Log("leftclicked");
9.             }

is not doing anything but 'leftclicked' when called from OnClick() in the inspector while clicking on a sprite which is setup properly

[ArenMook]

Tried a simple test: new scene, ALT+SHIFT+S, ALT+SHIFT+C, attached this script:

1. using UnityEngine;
2.  
3. public class Test : MonoBehaviour
4. {
5.         void OnClick ()
6.         {
7.                 Debug.Log("Touch ID: " + UICamera.currentTouchID);
8.         }
9. }
10.  

Hit play, left click, right click, middle click. See

Touch ID: -1
Touch ID: -2
Touch ID: -3