static var hierarchyWindowChanged : CallbackFunction

Description

Each time an object is (or a group of objects are) created, renamed, parented, unparented or destroyed this callback is raised.

See Also: EditorWindow.OnHierarchyChange.

using UnityEditor;
using UnityEngine;

public class ExampleCode {
    [MenuItem ("Example/Hierarchy Window Changed")]
    static void Example () {
        EditorApplication.hierarchyWindowChanged +=         ExampleCallback;
    }
    static void ExampleCallback () {
        Object[] all = Resources.FindObjectsOfTypeAll (typeof (Object));
        Debug.Log ("There are " + all.Length + " objects at the moment.");
    }
}