class in UnityEditor.Callbacks
/
Inherits from:CallbackOrderAttribute
/
Implemented in:UnityEditor
Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.
CloseFor some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.
CloseCallback attribute for opening an asset in Unity (e.g the callback is fired when double clicking an asset in the Project Browser).
Adding this attribute to a static method will make the method be called when Unity is about to open an asset. The method should have the following signature:
static bool OnOpenAsset(int instanceID, int line)
Return true if you handled the opening of the asset or false if an external tool should open it.
// C# example: using UnityEngine; using UnityEditor; using UnityEditor.Callbacks;
public class MyAssetHandler { [OnOpenAssetAttribute(1)] public static bool step1(int instanceID, int line) { string name = EditorUtility.InstanceIDToObject(instanceID).name; Debug.Log("Open Asset step: 1 (" + name + ")"); return false; // we did not handle the open }
// step2 has an attribute with index 2, so will be called after step1 [OnOpenAssetAttribute(2)] public static bool step2(int instanceID, int line) { Debug.Log("Open Asset step: 2 (" + instanceID + ")"); return false; // we did not handle the open } }
OnOpenAssetAttribute has an option to provide an order index in the callback, starting at 0. This is useful if you have more than one OnOpenAssetAttribute callback, and you would like them to be called in a certain order. Callbacks are called in order, starting at zero.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thanks for helping to make the Unity documentation better!