Interactable handling

Scripts/Selector.cs

@@ -9,18 +9,93 @@ public partial class Selector : Node2D
     private List<Interactable> _interactables = new List<Interactable>();
 
     private int _selectedInteractable;
+    
+    [Signal]
+    public delegate void SelectedItemInteractableChangedEventHandler(Interactable interactable);
+    
+    public Interactable SelectedInteractable
+    {
+        get =>
+            _interactables.Count > 0
+                ? _selectedInteractable >= _interactables.Count
+                    ? _interactables[^1]
+                    : _interactables[_selectedInteractable]
+                : null;
+        set
+        {
+            // Passing null deselects the interactable
+            if (value == null)
+            {
+                _selectedInteractable = -1;
+                NotifyChanged(null);
+                return;
+            }
+            
+            // If it's already in the list, set the current one to it, otherwise add it
+            if (!_interactables.Contains(value))
+            {
+                AddInteractable(value);
+            }
+
+            _selectedInteractable = _interactables.IndexOf(value);
+            NotifyChanged(value);
+        }
+    }
+
+    public override void _Process(double delta)
+    {
+        if (Input.IsActionPressed("scan"))
+        {
+            _selectedInteractable += 1;
+            UpdatePosition();
+        }
+    }
+
+    private void NotifyChanged(Interactable interactable)
+    {
+        EmitSignal(nameof(SelectedItemInteractableChanged), interactable);
+    }
 
     public void AddInteractable(Interactable interactable)
     {
         if (!_interactables.Contains(interactable)) {
             _interactables.Add(interactable);
+
+            if (_interactables.Count == 1)
+            {
+                _selectedInteractable = 0;
+            }
+            
+        }
+        UpdatePosition();
+    }
+
+    public void RemoveInteractable(Interactable interactable)
+    {
+        if (_interactables.Contains(interactable))
+        {
+            _interactables.Remove(interactable);
+        }
+        UpdatePosition();
+    }
+
+    public void Deselect()
+    {
+        _selectedInteractable = -1;
+        this.Visible = false;
+    }
+
+    public void UpdatePosition()
+    {
+        if (SelectedInteractable != null)
+        {
+            this.Position = SelectedInteractable.Position;
+            this.Visible = true;
+        }
+        else
+        {
+            this.Visible = false;
         }
     }
 
-    public void RemoveInteractable()
-    {
-
-    }
-
-
 }