gistfile1.txt

[OdinDrawer]
public class EntityHandleValueDrawer : OdinValueDrawer<EntityHandle>
{
    protected override void DrawPropertyLayout(IPropertyValueEntry<EntityHandle> entry, GUIContent label)
    {
        var componentPropertyTreeContext = entry.Property.Context.Get(this, "component_tree", (PropertyTree<ComponentContainer>)null);
        var isFoldoutActive = entry.Property.Context.Get(this, "is_expanded", false);

        if (componentPropertyTreeContext.Value == null)
        {
            // Initialize the property tree
            var container = new ComponentContainer();
            componentPropertyTreeContext.Value = new PropertyTree<ComponentContainer>(new ComponentContainer[] { container });
        }

        SirenixEditorGUI.BeginBox();
        {
            SirenixEditorGUI.BeginBoxHeader();
            {
                var handle = entry.SmartValue;
                var headingText = "[" + entry.TypeOfValue.Name + "] " + label?.text + " " + handle.Id + "/" + handle.Version;
                isFoldoutActive.Value = SirenixEditorGUI.Foldout(isFoldoutActive.Value,
                    GUIHelper.TempContent(headingText));
            }
            SirenixEditorGUI.EndBoxHeader();

            if (SirenixEditorGUI.BeginFadeGroup(UniqueDrawerKey.Create(entry, this), isFoldoutActive.Value))
            {
                if (!Engine.Instance.IsInitialized)
                {
                    EditorGUILayout.HelpBox("Ravioli Engine is not currently running.", MessageType.Warning);
                }
                else
                if (!Engine.Instance.Context.Entities.IsValid(entry.SmartValue))
                {
                    EditorGUILayout.HelpBox("Invalid handle.", MessageType.Warning);
                }
                else
                {
                    ((ComponentContainer)componentPropertyTreeContext.Value.WeakTargets[0])
                        .Components = Engine.Instance.Context.Entities.GetAllComponentsOfEntity(entry.SmartValue.Id)
                            .ToList();

                    // Draw the tree for the component container, which will draw the components list that was fetched from the entity handle
                    componentPropertyTreeContext.Value.Draw(false);
                }
            }
            SirenixEditorGUI.EndFadeGroup();
        }
        SirenixEditorGUI.EndBox();
    }

    [ShowOdinSerializedPropertiesInInspector]
    private class ComponentContainer // Property trees can't draw lists directly, only normal types, so we need to store the list in a normal type
    {
        [ShowInInspector]
        [ListDrawerSettings(DraggableItems = false, IsReadOnly = true, Expanded = false)]
        [BlueprintComponentWrapper]
        public List<object> Components;
    }
}