Is it possible to open ScriptableObjects in custom editor cindows with double click?

Hey,
I have a Question currently I am working on a custom Editor and I know how to load a file over an "Open File" Button but is there a way to open a ScriptableObject with a double click and then show the window?

Thanks for answers!
Bennet

 

You can use the OnOpenAsset attribute for this, a little hidden gem

Code (CSharp):

1. [OnOpenAsset]
2. //Handles opening the editor window when double-clicking project files
3. public static bool OnOpenAsset(int instanceID, int line)
4. {
5.     DruidProject project = EditorUtility.InstanceIDToObject(instanceID) as DruidProject;
6.     if (project != null)
7.     {
8.         DruidEditorWindow.OpenProjectFile(project);
9.         return true;
10.     }
11.     return false;
12. }

Code (CSharp):

1. //Handles correct behaviour when double-clicking a .watermesh asset assigned to a field
2. [OnOpenAsset]
3. public static bool OnOpenAsset(int instanceID, int line)
4. {
5.     Object target = EditorUtility.InstanceIDToObject(instanceID);
6.  
7.     if (target is Mesh)
8.     {
9.         var path = AssetDatabase.GetAssetPath(instanceID);
10.    
11.         if (Path.GetExtension(path) != ".watermesh") return false;
12.  
13.         Selection.activeObject = target;
14.         return true;
15.     }
16.  
17.     return false;
18. }

 

Thanks

 

In case anyone needs an example of this, here is how it worked for me in an existing serializableObject class that I made an editorWindow for.

(this is in 2022.0.b13)

Code (CSharp):

1. using UnityEditor;
2. using UnityEditor.Callbacks;
3. using UnityEngine;
4.  
5. public class GameStateFlow : ScriptableObject
6. {
7.     public GameStateNodeData[] NodeData;
8.  
9.     [OnOpenAssetAttribute(1)]
10.     public static bool OpenGameStateWindow(int instanceID, int line)
11.     {
12.         bool windowIsOpen = EditorWindow.HasOpenInstances<GameStateGraphWindow>();
13.         if (!windowIsOpen)
14.         {
15.             EditorWindow.CreateWindow<GameStateGraphWindow>();
16.         }
17.         else
18.         {
19.             EditorWindow.FocusWindowIfItsOpen<GameStateGraphWindow>();
20.         }
21.  
22.         // Window should now be open, proceed to next step to open file
23.         return false;
24.     }
25.  
26.     [OnOpenAssetAttribute(2)]
27.     public static bool OpenGameStateFlow(int instanceID, int line)
28.     {
29.         var window = EditorWindow.GetWindow<GameStateGraphWindow>();
30.  
31.         string assetPath = AssetDatabase.GetAssetPath(instanceID);
32.         window.LoadFromFile(assetPath);
33.  
34.         return true;
35.     }
36. }

 

I'm using my scriptable object in my game, so I can't have it in the Editor folder. This means I can't reference my EditorWindow class from my scriptable object. Does anyone have a solution for this?

 

I don't think anyone said your scriptable object had to be in an editor folder.

Just put your Editor window in an editor folder, and give it a static method that's decorated with the

[OnOpenAsset]

attribute, and keep all your editor code outside your runtime scriptable object.

 

Solved my problem! Thank you.

I have a custom GraphViewEditorWindow and an associated Graph-ScriptableObject to store nodes, node data and edges. I was also looking for a way to open / focus the GraphViewEditorWindow upon double clicking any Graph-ScriptableObject and load its data.

I changed the code a little bit because it seemed redundant to handle the double click callback in two seperate steps.

Code (CSharp):

1.     [OnOpenAssetAttribute]
2.     public static bool OpenGraphAsset(int instanceID, int line)
3.     {
4. // This gets called whenever ANY asset is double clicked
5. // So we gotta check if the asset is of the proper type
6.         UnityEngine.Object asset = EditorUtility.InstanceIDToObject(instanceID);
7.         if (!(asset is Graph)) return false;
8.  
9.         bool windowIsOpen = EditorWindow.HasOpenInstances<GraphEditorWindow>();
10.         if (!windowIsOpen) EditorWindow.CreateWindow<GraphEditorWindow>();
11.         else EditorWindow.FocusWindowIfItsOpen<GraphEditorWindow>();
12.  
13.         GraphEditorWindow window = EditorWindow.GetWindow<GraphEditorWindow>();
14.         string assetPath = AssetDatabase.GetAssetPath(instanceID);
15.         string fileName = System.IO.Path.GetFileNameWithoutExtension(assetPath);
16.         window.LoadGraphAssetViaFileName(fileName);
17.  
18.         return true;
19.     }

 

The ScriptingReference page for OnOpenAssetAttribute has been removed from the documentation in versions higher than 2020.3.
Is there a reason for this, are we not supposed to use it anymore? Did it get deprecated?

 

Not sure! I opened up a project in 2023.2 and the attribute is still present and works as expected.

I just submitted a problem to documentation page. Otherwise, at a glance, I couldn't find anything else that was meant to be a substitute.