Moved Bar slot selection handling to inventory manager

Babushka.csproj

@@ -2,5 +2,6 @@
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
     <EnableDynamicLoading>true</EnableDynamicLoading>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 </Project>

Babushka.sln.DotSettings

@@ -0,0 +1,5 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=0B2502BD29F5EC4798EEFD2950AA7E06/Description/@EntryValue">Godot Signal</s:String>
+	<s:String x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=0B2502BD29F5EC4798EEFD2950AA7E06/Text/@EntryValue">[Signal]
+public delegate void $SignalName$EventHandler($END$);</s:String>
+	<s:String x:Key="/Default/PatternsAndTemplates/LiveTemplates/Template/=0B2502BD29F5EC4798EEFD2950AA7E06/Field/=SignalName/Expression/@EntryValue">suggestVariableName()</s:String></wpf:ResourceDictionary>

scripts/CSharp/Common/Inventory/InventoryManager.cs

@@ -1,13 +1,27 @@
-#nullable enable
+using System;
 using Godot;
 
 namespace Babushka.scripts.CSharp.Common.Inventory;
 
 public partial class InventoryManager : Node
 {
-    public static InventoryManager Instance { get; private set; }
+    [Signal]
+    public delegate void SlotIndexChangedEventHandler(int newIndex);
+    
+    public static InventoryManager Instance { get; private set; } = null!;
+    public int CurrentSelectedSlotIndex
+    {
+        get => _currentSelectedSlotIndex;
+        set
+        {
+            _currentSelectedSlotIndex = value;
+            EmitSignalSlotIndexChanged(_currentSelectedSlotIndex);
+        }
+    }
 
-    public InventoryInstance playerInventory;
+    public InventoryInstance playerInventory = new InventoryInstance();
+
+    private int _currentSelectedSlotIndex = 0;
 
     public override void _EnterTree()
     {
@@ -16,7 +30,6 @@ public partial class InventoryManager : Node
 
     public override void _Ready()
     {
-        playerInventory = new InventoryInstance();
         playerInventory.SlotAmount = 37;
     }
 
@@ -68,4 +81,14 @@ public partial class InventoryManager : Node
     {
         return playerInventory.AddItem(itemInstance);
     }
-}
+
+    public InventorySlot GetCurrentSelectedSlot()
+    {
+        if (CurrentSelectedSlotIndex < 0 || CurrentSelectedSlotIndex > 8)
+            throw new ArgumentOutOfRangeException(
+                nameof(CurrentSelectedSlotIndex),
+                "currentInventoryBarIndex must be between 0 and 8 (inclusively)");
+
+        return playerInventory.Slots[CurrentSelectedSlotIndex];
+    }
+}

scripts/CSharp/Common/Inventory/InventoryUi.cs

@@ -1,4 +1,3 @@
-#nullable enable
 using Godot;
 
 namespace Babushka.scripts.CSharp.Common.Inventory;
@@ -12,8 +11,6 @@ public partial class InventoryUi : Control
 
     private int? _slotOnMouse;
 
-    private int _selectedSlot = 0;
-
     private bool _inventoryExtended = false;
     private Tween? _inventoryExtensionTween;
 
@@ -63,7 +60,7 @@ public partial class InventoryUi : Control
 
     private void SetSlotSelectPosition()
     {
-        _slotSelect.Position = new Vector2(_selectedSlot * 100, 0);
+        _slotSelect.Position = new Vector2(InventoryManager.Instance.CurrentSelectedSlotIndex * 100, 0);
     }
 
     private void PopulateSlots()
@@ -128,17 +125,17 @@ public partial class InventoryUi : Control
 
         if (Input.IsActionJustPressed("ui_inventory_disadvance"))
         {
-            _selectedSlot++;
+            InventoryManager.Instance.CurrentSelectedSlotIndex++;
-            if (_selectedSlot > 9)
+            if (InventoryManager.Instance.CurrentSelectedSlotIndex > 8)
-                _selectedSlot = 0;
+                InventoryManager.Instance.CurrentSelectedSlotIndex = 0;
             SetSlotSelectPosition();
         }
 
         if (Input.IsActionJustPressed("ui_inventory_advance"))
         {
-            _selectedSlot--;
+            InventoryManager.Instance.CurrentSelectedSlotIndex--;
-            if (_selectedSlot < 0)
+            if (InventoryManager.Instance.CurrentSelectedSlotIndex < 0)
-                _selectedSlot = 9;
+                InventoryManager.Instance.CurrentSelectedSlotIndex = 8;
             SetSlotSelectPosition();
         }
     }