ICanvasElement LayoutComplete not actually complete

What event/callback can I use to know that a Canvas has completed its full layout?

Simply registering a ICanvasElement and responding to the LayoutComplete is not enough.
CanvasUpdateRegistry.IsRebuildingLayout is still true.

so... Let's say I was spawning some objects in that LayoutComplete method and disabling them.

CanvasUpdateRegistry complains:

"Trying to remove element from rebuild list while we are already inside a rebuild loop. This is not supported."

Ok fine, I don't want to disable something in the rebuild loop, which is why I'm doing it in LayoutComplete. Maybe we need another method LayoutActuallyCompleteNow

 

For now I'm using a custom yield instruction:

Code (CSharp):

1. public class WaitForLayoutComplete : CustomYieldInstruction {
2.  
3.     public override bool keepWaiting {
4.  
5.         get { return CanvasUpdateRegistry.IsRebuildingLayout();    }
6.     }
7. }
8.  
9. public class MyObject : MonoBehaviour {
10.  
11.     public GameObject prefab;
12.  
13.     IEnumerator Start() {
14.  
15.         yield return new WaitForLayoutComplete();
16.  
17.         GameObject instance = Instantiate(prefab);
18.         instance.SetActive(false);
19.     }
20. }

 

register into it via
CanvasUpdateRegistry.RegisterCanvasElementForGraphicRebuild(this);
CanvasUpdateRegistry.RegisterCanvasElementForLayoutRebuild(this);