How do i get a callback every frame in edit mode

Question

I dont want to use an Editor Window or ScriptableObject or MonoBehaviour. I just want to get a callback called every frame without having the user having to click a menu item or something like that.

Answer 1

Answer by Joachim Ante · Dec 22, 2010 at 01:39 PM

You can use the InitializeOnLoad attribute combined with static constructors.

 using UnityEditor;
 using UnityEngine;

 [InitializeOnLoad]
 class MyClass
 {
     static MyClass ()
     {
         EditorApplication.update += Update;
     }
 
     static void Update ()
     {
         Debug.Log("Updating");
     }
 }

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TowerOfBricks · Dec 22, 2010 at 03:43 PM 1

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Or simply put the EditorApplication.update code in void OnEnable () {

TowerOfBricks · Dec 22, 2010 at 03:44 PM 0

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So you can skip the InitilizeOnLoad attribute.\n I assume you are using an editor script of some kind.

Joachim Ante · Dec 30, 2010 at 12:19 PM 2

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That only works if you have a ScriptableObject or $$anonymous$$onoBehaviour that has the OnEnable function. Thats not always the case, for this purpose we have the InitializeOnLoad attribute.

yoyo · Jan 31, 2011 at 09:26 PM 0

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And it only works if the object with the OnEnable method is in an Editor script, since EditorApplication is an Editor class.

Orion 1 · Mar 21, 2011 at 10:49 AM 4

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Hooray! Why is this attribute not documented? I spent half the day searching for something like this!

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Answer 2

Answer by Topillogical · Feb 25, 2018 at 11:46 PM

@Razgrizzz You can call any methods you want in your Update() method, but you will need static references to them.

 using UnityEditor;
 using UnityEngine;
 [InitializeOnLoad]
 class MyClass
 {
     public static List<MyObject> list;
 
     static MyClass ()
     {
         EditorApplication.update += Update;
         list = new List<MyObject>();
     }
 
      public MyClass(){ // regular constructor where we add this to static list
         MyClass.list.Add(this);
     }
 
     static void Update ()
     {
         Debug.Log("Updating");
         foreach(MyClass mc in list){
             mc.AnyPublicMethod();
         }         
     }
 
     public void AnyPublicMethod(){
         print("Dude.");
     }
 
 }

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How do i get a callback every frame in edit mode

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