Feature Request Using unity built-in SortingLayer

In

SpriteRenderer

there is a field

Sorting Layer

which can be used to select one of the created by developer sorting layers (by default there is always 1 precreated "Default" layer). Unity already have all this stuff and I want to use it. I have custom render system so I want to be able to do next things
* serialize layer as it happens in

SpriteRenderer

in my monobehaviours
* get selected layer position in whole layer range (like if it is 1st layer in layer list, then I want to get 0 index)

Is there a simple way of doing so without use reflection with unity classes and writing tones of editor code just to repeat what is already done but for some reason not public to use?

UPD: Unity, please make such things public, you already have it in your components, just let us use it without tones of boilerplate code just to access to all your private members.

 

This?

 

This example creates custom editor for entire class. Also this editor only works if you dealing with

SpriteRenderer

and it just let you assign layer name

string

and sorting order as an index.

What I need is: having serialized sorting layer as it appears with

SpriteRenderer

as a dropdown list of layers field.

 

Well there is the

UnityEngine.SortingLayer

struct that I imagine is used internally. Weirdly, it's not serialisable, nor does it have a property drawer on it's own.

Potentially all that's needed is a wrapper struct/class and a simple property drawer to bring this to parity on it's own.

 

I've found pretty simple solution here.

You can copy code from here

Spoiler

Code (CSharp):

1. using UnityEngine;
2.  
3. public class SortingLayerAttribute : PropertyAttribute { }

Code (CSharp):

1. using UnityEngine;
2. using UnityEditor;
3. using System.Reflection;
4.  
5. [CustomPropertyDrawer(typeof(SortingLayerAttribute))]
6.     public class SortingLayerPropertyDrawer : PropertyDrawer
7.     {
8.         private const string SortingLayerFieldMethodName = "SortingLayerField";
9.        
10.         public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
11.         {
12.             if (property.propertyType != SerializedPropertyType.Integer && property.propertyType != SerializedPropertyType.String)
13.                 Debug.LogError("SortedLayer property should be an integer or string ( the layer id )");
14.             else
15.                 SortingLayerField(new GUIContent("Sorting Layer"), property, EditorStyles.popup, EditorStyles.label);
16.         }
17.  
18.         public static void SortingLayerField(GUIContent label, SerializedProperty layerID, GUIStyle style, GUIStyle labelStyle)
19.         {
20.             var methodInfo = typeof(EditorGUILayout).GetMethod(SortingLayerFieldMethodName, BindingFlags.Static | BindingFlags.NonPublic, null, new[] { typeof(GUIContent), typeof(SerializedProperty), typeof(GUIStyle), typeof(GUIStyle) }, null);
21.  
22.             if (methodInfo == null)
23.             {
24.                 Debug.LogWarning($"{nameof(SortingLayerPropertyDrawer)} can't find {SortingLayerFieldMethodName}.");
25.                 return;
26.             }
27.                
28.             var parameters = new object[] { label, layerID, style, labelStyle };
29.             methodInfo.Invoke(null, parameters);
30.         }      
31.     }

Usage example

Code (CSharp):

1. public class Foo : MonoBehaviour
2. {
3.     [SortingLayer][SerializedFiled] _sortingLayerID;
4.  
5.     public int LayerIndex => UnityEngine.SortingLayer.GetLayerValueFromID(_sortingLayerID)
6. }