using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

public class GetChildsEditorWindow : EditorWindow
{
    public Transform transform;
    int levelsMin = 3, levelsMax = 4;
    static int currentLevel;
    List<Transform> allChildren = new List<Transform>();
    static int oldLevel = 0;
    Vector2 scrollPos;
    public int levelNum = 0;
    public int totalLevels = 0;

    // Add menu named "My Window" to the Window menu
    [MenuItem("Get Childs/Get")]
    static void Init()
    {
        oldLevel = currentLevel;
        // Get existing open window or if none, make a new one:
        GetChildsEditorWindow window = (GetChildsEditorWindow)EditorWindow.GetWindow(typeof(GetChildsEditorWindow), false, "Get Childs");
        window.Show();
    }

    private void OnGUI()
    {
        GUILayout.Space(20);
        transform = EditorGUILayout.ObjectField("Transform to get childs", transform, typeof(Transform), true) as Transform;

        EditorGUI.BeginDisabledGroup(transform == null);
        currentLevel = (int)EditorGUILayout.Slider("Slider", currentLevel, levelsMin, levelsMax);
        EditorGUI.EndDisabledGroup();

        if (allChildren != null && allChildren.Count > 0)
        {
            EditorGUILayout.BeginHorizontal();
            scrollPos =
                EditorGUILayout.BeginScrollView(scrollPos, GUILayout.Width(400), GUILayout.Height(400));
            for (int i = 0; i < allChildren.Count; i  )
            {
                allChildren[i] = EditorGUILayout.ObjectField("Transform "   i.ToString(), allChildren[i], typeof(Transform), true) as Transform;
            }
            EditorGUILayout.EndScrollView();
            EditorGUILayout.EndHorizontal();
        }

        if (oldLevel != currentLevel)
        {
            if (transform != null)
            {
                allChildren = new List<Transform>();
                IterateOverChild(transform, currentLevel, levelsMax);
                oldLevel = currentLevel;
            }
        }

        if(GUILayout.Button("GEt it"))
        {
            IterateOverChild(transform, 1);
            Debug.Log(currentLevel);
        }
    }

    public void IterateOverChild(Transform original, int currentLevel, int maxLevel)
    {
        if (currentLevel > maxLevel) return;
        for (var i = 0; i < original.childCount; i  )
        {
            Debug.Log($"{original.GetChild(i)}");
            allChildren.Add(original.GetChild(i));
            IterateOverChild(original.GetChild(i), currentLevel   1, maxLevel);
        }
    }

    public void IterateOverChild(Transform original, int currentLevel)
    {
        for (var i = 0; i < original.childCount; i  )
        {
            Debug.Log($"{original.GetChild(i)}");
            allChildren.Add(original.GetChild(i));
            IterateOverChild(original.GetChild(i), currentLevel   1);            
        }
    }
}

I want to get automatic all the level depth for each object and display it in the editorwindow.

For example :

Object 1 is at level 0
Onject 2 is at level 3
Object 3 is at level 0

but i'm having some problems :

The code now the second method IterateOverChild display in the end 3 levels total but there are 4 levels. and how to display each object the level he is at ?

In the screenshot the arrows in red are level 1 the arrows in green are level 2 yellow level 3 and blue level 4 :

I see two GameObject's at level 1 GameObject and GameObject (1) then 2 GameObject's at level 2 and two objects at level 3 and one last at level 4. this is how i see the logic of the levels.

I want to update the ui editor window panel with the objects and each object on what level he is at near each object to show the level number. ( I gave the objects names Level 1 Level 2 Level 3 Level 4 just to name them with my logic of how i see the levels ).

CodePudding user response：

How To Get Level of Any Transform?

This method completely shows the level. Just put the desired transform in the parameter:

public static int ObjectLevel(Transform current, int level = 0)
{
    if (current.parent) return ObjectLevel(current.parent,   level);

    return level;
}

Similar method in a line:

public static int ObjectLevel(Transform current, int level = 0) => current.parent ? ObjectLevel(current.parent,   level) : level;

An Example...

Here that shows the level of all game objects:

public void Start()
{
    foreach (var _transform in GameObject.FindObjectsOfType<Transform>())
    {
        var level = ObjectLevel(_transform);
        
        _transform.name  = ", level: "   level;
    }
}

Result: