Editor.OnSceneGUI never called

Questions & Answers
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1

I’m trying to understand why OnEditorGUI is never called on my custom Editor subclass.

The code is as follow:

using UnityEngine;
using UnityEditor;
  
[CustomEditor(typeof(Bezier))]
public class BezierEditor : Editor
{
	public override void OnInspectorGUI ()
	{
		base.OnInspectorGUI ();
		Debug.Log("on inspector gui");
	}
	
	public void OnSceneGUI()
	{
		Debug.Log("on scene gui");
	}
}

OnInspectorGUI is properly called and the debug show for it, but not for OnSceneGUI. I’m using the latest Unity version 3.4.1f5

3

Not a definitive fix, but if it happens again you can reset the editor Layout with the top-right button (for instance to Default).

I had the same issue with my custom editor and a tilemap plugin that stopped displaying its the tiling tools. Closing and restarting the editor didn’t solve it. Resetting the layout solved it.

4

Turning the visibility of Gizmos on in the Scene view worked for me. I had turned them off for some reason and OnSceneGUI stopped being called.

6

Gizmo’s need to be enabled

OnSceneGui is not called if Gizmo’s are disabled…

5

I know it’s already 2023. But I meet the problem too! Unity-2021-3-LTS (2021.3.20f1)

After some debug, I think add the following code in inspector OnEnable() method will fix it:

// force dirty SceneView.s_ActiveEditors
// maybe this is a unity bug
var method = typeof(SceneView).GetMethod("SetActiveEditorsDirty", BindingFlags.NonPublic | BindingFlags.Static);
// ReSharper disable once PossibleNullReferenceException
method.Invoke(null, new object[]{true});

The truth is the new Inspector is not added to the SceneView.s_ActiveEditors list, so call this dirty method to refresh this list will fix this problem.

2

Old question. But maybe someone find same issue. When I have “DEBUG” enabled on Inspector, OnGUI does not work for me either. I must disable it.

I’m guessing it’s a bug, cause why it would stop working?