How to get OnCancel() or other UI callbacks called

Hello everybody,
can you please give me a hint on how to get OnSubmit() or OnCancel() called in my scripts with the new Input System during UI navigation?
Input System UI Input Module and EventSystem are apparently correctly configured as i can move through UI as intended and even trigger OnClick() in UI buttons, but no callbacks such as OnCancel() or OnMove() are actually called in my scripts.
During gameplay, other actions set in another action map inside my InputActionAsset are called without any problem after players have joined the Player Input Manager. I can't understand why during menus I can navigate and "click" without joining but I can't get the input system callbacks to be triggered.

The following code does not work:

Code (CSharp):

1.  
2. using UnityEngine.EventSystems;
3. using UnityEngine.InputSystem;
4.  
5. [...]
6.  
7.         public void OnCancel(InputAction.CallbackContext context)
8.         {
9.             Debug.Log("This is never called!");
10.         }

Thanks!

 

55 reads and no answer? Was it such a bad question?
I will let you know if I can find a solution

 

How would the Input System know which GameObject to trigger it on then?

 

Since there still is no answer in this thread I'm sharing my workaround in case someone else gets here from Google like I did. Just like OP I found that attaching events to the UI/Cancel event on the PlayerInput component doesn't work. The ICancelHandler also did nothing, I guess because that only works on active UI elements? I was able to get around it by defining my own action under Player instead of under UI. Using the "Cancel [Any]" binding I was able to capture the back button/gesture on Android which was my use case.

I really think that something needs to be clarified in the documentation about this. Are the actions under the UI category only available to the Unity's UI? It would also be good to know what the official approach to handling the back button/gesture on Android in the new input system since my approach feels a bit hacky.

 

Hi. The following works for me.

First I have a singleton which holds the InputSystemUIInputModule component because, you know, why waste the memory.

Code (CSharp):

1. public class UIInputModuleBridge : MonoBehaviour {
2.  
3.     public static UIInputModuleBridge instance ;
4.  
5.     public InputSystemUIInputModule module ;
6.  
7.     private void Awake () => instance = this ;
8. }

Then wherever I need back button functionality I add the following component and set events as needed.

Code (CSharp):

1. public class BackButtonInput : MonoBehaviour {
2.  
3.     [ SerializeField ] private UnityEvent onTriggered ;
4.  
5.     private void OnEnable () => UIInputModuleBridge.instance.module.cancel.action.performed += Trigger ;
6.  
7.     private void OnDisable () => UIInputModuleBridge.instance.module.cancel.action.performed -= Trigger ;
8.  
9.     private void Trigger ( InputAction.CallbackContext context ) => onTriggered.Invoke () ;
10. }

Voila! Enjoy!