Inventory slots are highlighted if the cursor is within 5 pixels of the rect. The spacing between inventory slots is 10 px, so now items can't be accidentally dropped by releasing the cursor between slots.

Barotrauma/BarotraumaClient/Source/Items/CharacterInventory.cs

@@ -95,18 +95,15 @@ namespace Barotrauma
 
             int rectWidth = 40, rectHeight = 40;
 
-            Rectangle slotRect = new Rectangle(0, 0, rectWidth, rectHeight);
             for (int i = 0; i < capacity; i++)
             {
-                if (slots[i] == null) slots[i] = new InventorySlot(slotRect);
+                Rectangle slotRect = new Rectangle(
+                    (int)(SlotPositions[i].X + DrawOffset.X), 
+                    (int)(SlotPositions[i].Y + DrawOffset.Y), 
+                    rectWidth, rectHeight);
 
+                slots[i] = new InventorySlot(slotRect);
                 slots[i].Disabled = false;                
-
-                slotRect.X = (int)(SlotPositions[i].X + DrawOffset.X);
-                slotRect.Y = (int)(SlotPositions[i].Y + DrawOffset.Y);
-
-                slots[i].Rect = slotRect;
-
                 slots[i].Color = limbSlots[i] == InvSlotType.Any ? Color.White * 0.2f : Color.White * 0.4f;
             }
 
@@ -182,7 +179,7 @@ namespace Barotrauma
                 if (rootContainer != null)
                 {
                     rootInventory = rootContainer.ParentInventory != null ?
-                        rootContainer.ParentInventory : rootContainer.GetComponent<Items.Components.ItemContainer>().Inventory;
+                        rootContainer.ParentInventory : rootContainer.GetComponent<ItemContainer>().Inventory;
                 }
 
                 if (rootInventory != null &&
@@ -209,6 +206,7 @@ namespace Barotrauma
                     if (Items[n] == Items[i])
                     {
                         slots[i].Rect = Rectangle.Union(slots[i].Rect, slots[n].Rect);
+                        slots[i].InteractRect = Rectangle.Union(slots[i].InteractRect, slots[n].InteractRect);
                         slots[n].Disabled = true;
                     }
                 }

Barotrauma/BarotraumaClient/Source/Items/Inventory.cs

@@ -10,6 +10,8 @@ namespace Barotrauma
     {
         public Rectangle Rect;
 
+        public Rectangle InteractRect;
+
         public bool Disabled;
 
         public GUIComponent.ComponentState State;
@@ -30,6 +32,8 @@ namespace Barotrauma
         public InventorySlot(Rectangle rect)
         {
             Rect = rect;
+            InteractRect = rect;
+            InteractRect.Inflate(5, 5);
             State = GUIComponent.ComponentState.None;
             Color = Color.White * 0.4f;
         }
@@ -151,7 +155,7 @@ namespace Barotrauma
 
 
             if (draggingItem != null &&
-                (draggingSlot == null || (!draggingSlot.Rect.Contains(PlayerInput.MousePosition) && draggingItem.ParentInventory == this)))
+                (draggingSlot == null || (!draggingSlot.InteractRect.Contains(PlayerInput.MousePosition) && draggingItem.ParentInventory == this)))
             {
                 if (!PlayerInput.LeftButtonHeld())
                 {
@@ -166,7 +170,7 @@ namespace Barotrauma
 
         protected void UpdateSlot(InventorySlot slot, int slotIndex, Item item, bool isSubSlot)
         {
-            bool mouseOn = slot.Rect.Contains(PlayerInput.MousePosition) && !Locked;
+            bool mouseOn = slot.InteractRect.Contains(PlayerInput.MousePosition) && !Locked;
             
             slot.State = GUIComponent.ComponentState.None;
 
@@ -268,7 +272,7 @@ namespace Barotrauma
             }
 
             if (draggingItem != null &&
-                (draggingSlot == null || (!draggingSlot.Rect.Contains(PlayerInput.MousePosition) && draggingItem.ParentInventory == this)))
+                (draggingSlot == null || (!draggingSlot.InteractRect.Contains(PlayerInput.MousePosition) && draggingItem.ParentInventory == this)))
             {
                 Rectangle dragRect = new Rectangle(
                     (int)PlayerInput.MousePosition.X - 10,