Custom TextureImporterInspector

Good day everyone. Just want to share some code if anyone in need for it. Recently i was working on extending import of some supported image formats so i came in need for a custom TextureImporterInspector. The problem was to show custom Inspector for some formats and usual for others. So here is the solution based on some reflection black magic:

Code (csharp):

1.  
2. [CustomEditor(typeof(TextureImporter))]
3. public class TextureImporterCustomEditor : Editor
4. {
5.     private SerializedObject serializedTarget;
6.  
7.     private Editor nativeEditor;
8.  
9.     public void OnEnable()
10.     {
11.         serializedTarget = new SerializedObject(target);
12.         SceneView.onSceneGUIDelegate = TargetUpdate;    
13.    
14.         Type t = null;  
15.         foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
16.         {
17.             foreach (Type type in assembly.GetTypes())
18.             {
19.                 if (type.Name.ToLower().Contains("textureimporterinspector"))
20.                 {
21.                     t = type;
22.                     break;
23.                 }
24.             }
25.         }
26.  
27.         nativeEditor = Editor.CreateEditor(serializedObject.targetObject, t);
28.     }
29.  
30.     void TargetUpdate(SceneView sceneview)
31.     {
32.         Event e = Event.current;
33.     }
34.  
35.     public override void OnInspectorGUI()
36.     {
37.         if (nativeEditor != null)
38.         {    
39.             bool isCustom = // check  ((TextureImporter)serializedObject.targetObject).assetPath for file formats you need
40.             if (isCustom)
41.             {
42.               // Do your stuff here
43.               // you can use ((TextureImporter)serializedObject.targetObject).userData to store your stuff between sessions
44.             }
45.             else
46.               nativeEditor.OnInspectorGUI();        
47.         }
48.  
49.         // Unfortuanaly we cant hide ImportedObject section because InspectorWindow check it by
50.         //  if (editor is AssetImporterEditor) and all flags that this check sets are method local variables
51.         //  so aside from direct patching UnityEditor.dll no luck for reflection here :(
52.      
53.         //  in my case i just moved ImportedObject section out of view
54.         GUILayout.Space(2048);      
55.  
56.         SceneView.RepaintAll();
57.     }
58.     protected override void OnHeaderGUI()
59.     {  
60.          // We cant use nativeEditor.OnHeaderGUI because some internal variables not sets correctly by:
61.          // Editor.CreateEditor so do some stuff to emulate native inspector header or customize it for your likes
62.     }
63. }
64.  

 

it works , I have been searching for a long time for this, thx

 

wow

it works!!

I applaud you

 

It worked kinda... the Apply and Revert buttons disappear using the script. Any help?

Edit: I ended up writing apply and reset on my own.

 

Just in case it is still useful for someone, you probably lacked this call: https://docs.unity3d.com/ScriptReference/AssetImporters.AssetImporterEditor.ApplyRevertGUI.html