Misc hand ui fixes (#12048)

Content.Client/UserInterface/Systems/Hands/HandsUIController.cs

@@ -1,4 +1,4 @@
-using Content.Client.Gameplay;
+using Content.Client.Gameplay;
 using Content.Client.Hands;
 using Content.Client.Hands.Systems;
 using Content.Client.UserInterface.Controls;
@@ -146,7 +146,6 @@ public sealed class HandsUIController : UIController, IOnStateEntered<GameplaySt
 
     private void OnItemAdded(string name, EntityUid entity)
     {
-        HandsGui?.UpdatePanelEntity(entity);
         var hand = GetHand(name);
         if (hand == null)
             return;
@@ -154,15 +153,20 @@ public sealed class HandsUIController : UIController, IOnStateEntered<GameplaySt
         {
             hand.SpriteView.Sprite = sprite;
         }
+
+        if (_playerHandsComponent?.ActiveHand?.Name == name)
+            HandsGui?.UpdatePanelEntity(entity);
     }
 
     private void OnItemRemoved(string name, EntityUid entity)
     {
-        HandsGui?.UpdatePanelEntity(null);
         var hand = GetHand(name);
         if (hand == null)
             return;
+
         hand.SpriteView.Sprite = null;
+        if (_playerHandsComponent?.ActiveHand?.Name == name)
+            HandsGui?.UpdatePanelEntity(null);
     }
 
     private HandsContainer GetFirstAvailableContainer()
@@ -364,17 +368,14 @@ public sealed class HandsUIController : UIController, IOnStateEntered<GameplaySt
         {
             foreach (var hand in container.GetButtons())
             {
-                if (hand.Entity is not { } entity)
+                if (!_entities.TryGetComponent(hand.Entity, out ItemCooldownComponent? cooldown) ||
-                    return;
-
-                if (_entities.Deleted(entity) ||
-                    !_entities.TryGetComponent(entity, out ItemCooldownComponent? cooldown) ||
                     cooldown is not { CooldownStart: { } start, CooldownEnd: { } end})
                 {
                     hand.CooldownDisplay.Visible = false;
                     return;
                 }
 
+                hand.CooldownDisplay.Visible = true;
                 hand.CooldownDisplay.FromTime(start, end);
             }
         }

Content.Client/UserInterface/Systems/Inventory/InventoryUIController.cs

@@ -1,5 +1,6 @@
 using Content.Client.Gameplay;
 using Content.Client.Hands;
+using Content.Client.Hands.Systems;
 using Content.Client.Inventory;
 using Content.Client.Storage;
 using Content.Client.UserInterface.Controls;
@@ -20,11 +21,12 @@ using static Robust.Client.UserInterface.Controls.BaseButton;
 namespace Content.Client.UserInterface.Systems.Inventory;
 
 public sealed class InventoryUIController : UIController, IOnStateEntered<GameplayState>, IOnStateExited<GameplayState>,
-    IOnSystemChanged<ClientInventorySystem>
+    IOnSystemChanged<ClientInventorySystem>, IOnSystemChanged<HandsSystem>
 {
     [Dependency] private readonly IEntityManager _entities = default!;
 
     [UISystemDependency] private readonly ClientInventorySystem _inventorySystem = default!;
+    [UISystemDependency] private readonly HandsSystem _handsSystem = default!;
 
     private ClientInventoryComponent? _playerInventory;
     private readonly Dictionary<string, ItemSlotButtonContainer> _slotGroups = new();
@@ -33,6 +35,8 @@ public sealed class InventoryUIController : UIController, IOnStateEntered<Gamepl
     private ItemSlotButtonContainer? _inventoryHotbar;
     private MenuButton? InventoryButton => UIManager.ActiveScreen?.GetWidget<MenuBar.Widgets.GameTopMenuBar>()?.InventoryButton;
 
+    private SlotControl? _lastHovered = null;
+
     public void OnStateEntered(GameplayState state)
     {
         DebugTools.Assert(_strippingWindow == null);
@@ -247,6 +251,12 @@ public sealed class InventoryUIController : UIController, IOnStateEntered<Gamepl
     }
 
     private void SlotButtonHovered(GUIMouseHoverEventArgs args, SlotControl control)
+    {
+        UpdateHover(control);
+        _lastHovered = control;
+    }
+
+    public void UpdateHover(SlotControl control)
     {
         var player = _playerInventory?.Owner;
 
@@ -345,4 +355,40 @@ public sealed class InventoryUIController : UIController, IOnStateEntered<Gamepl
     {
         _slotGroups.Remove(slotGroupName);
     }
+
+    // Monkey Sees Action
+    // Neuron Activation
+    // Monkey copies code
+    public void OnSystemLoaded(HandsSystem system)
+    {
+        _handsSystem.OnPlayerItemAdded += OnItemAdded;
+        _handsSystem.OnPlayerItemRemoved += OnItemRemoved;
+        _handsSystem.OnPlayerSetActiveHand += SetActiveHand;
+    }
+
+    public void OnSystemUnloaded(HandsSystem system)
+    {
+        _handsSystem.OnPlayerItemAdded -= OnItemAdded;
+        _handsSystem.OnPlayerItemRemoved -= OnItemRemoved;
+        _handsSystem.OnPlayerSetActiveHand -= SetActiveHand;
+    }
+
+
+    private void OnItemAdded(string name, EntityUid entity)
+    {
+        if (_lastHovered != null)
+            UpdateHover(_lastHovered);
+    }
+
+    private void OnItemRemoved(string name, EntityUid entity)
+    {
+        if (_lastHovered != null)
+            UpdateHover(_lastHovered);
+    }
+
+    private void SetActiveHand(string? handName)
+    {
+        if (_lastHovered != null)
+            UpdateHover(_lastHovered);
+    }
 }