CODEWITHSUNDEEP
c#unity-game-engine
Stefan Carpeliuc
Stefan Carpeliuc

Reputation: 45

Don't allow adding/removing list elements from inspector

How can i code so people can't add/remove list elements from the inspector, but still be able to see the elements?

Something like

[ReadOnlyField, NonReorderable]public List<CustomType> CustomTypeList = new();

Upvotes: 1

Views: 1016

Answers (3)

Toan Tran
Toan Tran

Reputation: 26

You can use custom editor for this, here is an example

    using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    #if UNITY_EDITOR
    using UnityEditor;
    #endif
    
    public class Example : MonoBehaviour
    {
        [System.Serializable]
        public class Item
        {
            public int a;
            public string b;
            public Vector2 v;
        }
    
    
        public List<Item> listArrayA = new() { new Item(), new Item() };
        public List<Item> listArrayB = new() { new Item(), new Item() };
        public Item itemA;
    
    #if UNITY_EDITOR
        [CustomEditor(typeof(Example))]
        public class ExampleEditor : Editor
        {
            private string[] disableProperties = new string[] { "listArrayB", "itemA" };
    
            public override void OnInspectorGUI()
            {
                DrawPropertiesExcluding(serializedObject, this.disableProperties);
    
                EditorGUI.BeginDisabledGroup(true);
    
                for (var i = 0; i < this.disableProperties.Length; i++)
                {
                    EditorGUILayout.PropertyField(serializedObject.FindProperty(this.disableProperties[i]));
                }
    
                EditorGUI.EndDisabledGroup();
                serializedObject.ApplyModifiedProperties();
            }
        }
    #endif
    }

Result

enter image description here

If you just want to prevent other editing your fields, no need to create custom editor, just make theme private fields then create public properties to access theme, their values can be viewed by change Inspector mode to Debug Change inspector view mode to debug

enter image description here

Upvotes: 1

Milan Egon Votrubec
Milan Egon Votrubec

Reputation: 4049

Sure, you could hack a solution with OnValidate as described here. The general flow would be to read the list of items when the object is enabled and store those in a secondary array. When OnValidate is called, if the list visible in the Inspector doesn’t match the peivate list, then overwrite the elements in the visible list with the private items. Note, you can’t just assign one List object to another. This won’t copy a list, it’ll just make both variables point to the same list. So, the answer is yes, it can be done.

Now, ask me if this is a good idea. The answer would be, no, I don’t see any good reason for this. If you’re worried about a designer, for example, mucking up your list of items, then either move those items elsewhere the designer is told not to touch, hard code the items, or instantiate them if need be.

Upvotes: 1

Berke Kaan Cetinkaya
Berke Kaan Cetinkaya

Reputation: 828

It's not possible. Maybe you can try creating a custom editor script just to show them in the inspector.

Upvotes: 0

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