UnityEditorEventUtility class

Sometimes, an idiot overrides a delay action subscription to UnityEditor.EditorApplication.delayCall, which can be done because the people at Unity didn't know what events were once upon a time. This method subscribes to a lot of different callbacks, in the hopes of catching at least one.

Sometimes, an idiot overrides a delay action subscription to UnityEditor.EditorApplication.delayCall, which can be done because the people at Unity didn't know what events were once upon a time. This method subscribes to a lot of different callbacks, in the hopes of catching at least one.

Sometimes, someone accidentally overrides a delay action subscription to UnityEditor.EditorApplication.delayCall by setting the value instead of using the += operator as should be done, which can be done because in many versions of Unity it is a field, and not an event. (In some versions of Unity it is an event, though, and in this case, this method acts as a wrapper to subscribe reliably, no matter the nature of the backing event.) This method subscribes to a lot of different callbacks, in the hopes of catching at least one.

As opposed to DelayAction(Action), this method is safe to call from any thread, and will delay the actual subscription to a safe time.

In 2019.1+, this event subscribes to SceneView.duringSceneGui. In 2018.4 and lower, it subscribes to SceneView.onSceneGUIDelegate.

In 2020.1, Unity changed EditorApplication.delayCall from a field to an event, meaning we now have to use reflection to access it consistently across all versions of Unity.