CollectableResource.cs

using Godot;
 
namespace MPewsey.ManiaMapGodot
{
    [Tool]
    [GlobalClass]
    public partial class CollectableResource : Resource
    {
        private bool _editId;
        [Export] public bool EditId { get => _editId; set => SetValidatedField(ref _editId, value); }
 
        [Export] public int Id { get; set; } = Rand.GetRandomId();
 
        private void SetValidatedField<T>(ref T field, T value)
        {
            field = value;
            NotifyPropertyListChanged();
        }
 
        public override void _ValidateProperty(Godot.Collections.Dictionary property)
        {
            base._ValidateProperty(property);
            var name = property["name"].AsStringName();
 
            if (name == PropertyName.Id)
            {
                var flag = EditId ? PropertyUsageFlags.None : PropertyUsageFlags.ReadOnly;
                property["usage"] = (int)(PropertyUsageFlags.Default | flag);
            }
        }
    }
}