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@elringus
Created June 29, 2017 14:06
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ReadOnly property drawer for Unity: add a [ReadOnly] attribute to a serialized field to make it show up as read only in the inspector
// Put this outside of an 'Editor' folder.
using UnityEngine;
public class ReadOnlyAttribute : PropertyAttribute { }
// Put this to an 'Editor' folder.
using UnityEngine;
using UnityEditor;
[CustomPropertyDrawer(typeof(ReadOnlyAttribute))]
public class ReadOnlyPropertyDrawer : PropertyDrawer
{
public override void OnGUI (Rect position, SerializedProperty property, GUIContent label)
{
GUI.enabled = false;
EditorGUI.PropertyField(position, property, label, true);
GUI.enabled = true;
}
public override float GetPropertyHeight (SerializedProperty property, GUIContent label)
{
return EditorGUI.GetPropertyHeight(property, label, true);
}
}
@Yolo-Jerome
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Unfortunately it doesn't fully work for Lists:

[ReadOnly] public List<int> test = new List<int>(){ 1,2,3};

2019-04-02_1217

The most "dangerous" value to change is till available.


And it especially doesn't work for nested elements:

2019-04-02_1220

where the elements are of type

[Serializable]
public class TestClass
{
    public int num;
    public string text;
}

[ReadOnly] public List<TestClass> test = new List<TestClass>(){
    new TestClass(),
    new TestClass{num = 2, text = "Hi"},
    new TestClass{num = 3, text = "asd"}
};

also if it is not in a list like

[ReadOnly] public TestClass test = new TestClass();

@J-Bustin
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As @Yolo-Jerome wrote, it's not perfect.
However, for all other cases, it is very useful and I thank you for it! :)

Best regards.

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