removed old stuff

Assets/jelycho/Code/Player/HUD/PlayerHUD.cs

@@ -1,5 +1,4 @@
-using System;
-using R3;
+using RebootKit.Engine.Extensions;
 using UnityEngine;
 using UnityEngine.UIElements;
 using Logger = RebootKit.Engine.Foundation.Logger;
@@ -14,32 +13,41 @@ namespace RebootReality.jelycho.Player.HUD {
         [field: SerializeField] public PlayerInventoryUI InventoryUI { get; private set; }
 
         PlayerActor m_PlayerActor;
-        DisposableBag m_ActorBag;
 
         void OnEnable() {
         }
 
         void OnDisable() {
             InventoryUI.CleanUp();
-            m_ActorBag.Dispose();
         }
         
         public void SetPlayerActor(PlayerActor actor) {
-            m_ActorBag.Dispose();
-
-            if (actor == null) {
-                m_PlayerActor = null;
-                InventoryUI.CleanUp();
+            UnsetPlayerActor();
+            
+            if (actor.OrNull() == null) {
                 return;
             }
 
-            m_ActorBag = new DisposableBag();
             m_PlayerActor = actor;
             InventoryUI.Configure(m_MainDocument.rootVisualElement.Q("player-hud__inventory-slots"), actor.Inventory);
             
-            actor.SelectedInventorySlot.Subscribe(x => {
-                InventoryUI.SetSelectedSlot(x);
-            }).AddTo(ref m_ActorBag);
+            actor.OnSelectedInventorySlotChanged += OnInventorySelectedSlotChanged;
+            InventoryUI.SetSelectedSlot(actor.SelectedInventorySlot);
+        }
+        
+        void UnsetPlayerActor() {
+            if (m_PlayerActor.OrNull() == null) {
+                return;
+            }
+            
+            m_PlayerActor.OnSelectedInventorySlotChanged -= OnInventorySelectedSlotChanged;
+
+            m_PlayerActor = null;
+            InventoryUI.CleanUp();
+        }
+        
+        void OnInventorySelectedSlotChanged(int newIndex) {
+            InventoryUI.SetSelectedSlot(newIndex);
         }
     }
 }