Unity UI Manually Trigger Navigation Events in Script?

I can't seem to find this in the UI Scripting API or anywhere else obvious, but is there a way to trigger UI navigation manually through script?

I'm working with a custom input device and I'd like to be able to functionally do this:

1. User hits "down" on input device
2. UI selects whatever Unity has set
for the down navigation option, auto
nav or otherwise

That would spare me from having to setup my own nav relationship between elements and traverse it with `SetSelectedGameObject`.

 

You probably need a custom Input Module.

You can take the StandaloneInputModule as a reference and probably just need to rewrite

GetRawMoveVector()

.

 

@Fenrisul on the Unity Discord helped me solve it with this - it works flawlessly!

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.EventSystems;
3.  
4. [RequireComponent(typeof(EventSystem))]
5. public class NavigationInjector : MonoBehaviour
6. {
7.     EventSystem eventSystem;
8.  
9.     private void Awake()
10.     {
11.         eventSystem = GetComponent<EventSystem>();
12.     }
13.  
14.     public void Move(MoveDirection direction)
15.     {
16.         AxisEventData data = new AxisEventData(EventSystem.current);
17.  
18.         data.moveDir = direction;
19.  
20.         data.selectedObject = EventSystem.current.currentSelectedGameObject;
21.  
22.         ExecuteEvents.Execute(data.selectedObject, data, ExecuteEvents.moveHandler);
23.     }
24.  
25.     private void Update()
26.     {
27.         if (Input.GetKeyDown(KeyCode.PageDown))
28.             Move(MoveDirection.Down);
29.  
30.         if (Input.GetKeyDown(KeyCode.PageDown))
31.             Move(MoveDirection.Up);
32.     }
33. }

 

thanks to this thread, I wrote an all-purpose function for forcing a deselect input event on a UI object (like a button or event trigger)

Code (CSharp):

1. public void Deselect(GameObject obj) {
2.     ExecuteEvents.Execute(obj, new PointerEventData(EventSystem.current), ExecuteEvents.deselectHandler);
3. }