added ItemStorage.cs, ItemStorageSlot.cs, ItemStorageUI.cs

* Inventory, InventorySlot, InventoryUI, Shop, ShopSlot, ShopUI are extending them

Assets/Scripts/ItemStorageUI.cs

@@ -0,0 +1,55 @@
+using System.Linq;
+using UnityEngine;
+
+public class ItemStorageUI : MonoBehaviour {
+    public Transform itemsParent;
+    public GameObject inventoryUI;
+    private Inventory _inventory;
+    private InventorySlot[] _slots;
+
+    private void Start() {
+        // Get Inventory instance and add UpdateUI method to OnItemChanged delegate
+        _inventory = Inventory.instance;
+        _inventory.onItemChangedCallback += UpdateUI;
+
+        // Add all InventorySlot GameObjects to _slots and turn off the Inventory UI
+        _slots = itemsParent.GetComponentsInChildren<InventorySlot>();
+        ToggleInventory();
+
+        // Set the icon to not be a raycast target for the Description Hovering to work
+        foreach(InventorySlot slot in _slots) {
+            slot.icon.raycastTarget = false;
+        }
+    }
+
+    private void Update() {
+        // When "Inventory" button is pressed turn on/off Inventory UI
+        if(Input.GetButtonDown("Inventory")) {
+            ToggleInventory();
+        }
+    }
+
+    /**
+     * Turn on/off the Inventory UI
+     */
+    private void ToggleInventory() {
+        inventoryUI.SetActive(!inventoryUI.activeSelf);
+    }
+
+    /**
+     * Is called when something in the Inventory UI should update
+     */
+    private void UpdateUI() {
+        // Add all items to the correct slots and clear the ones where no item should be
+        for(int i = 0; i < _slots.Length; i++) {
+            if(i < _inventory.items.Count) {
+                _slots[i].AddItem(_inventory.items.ElementAt(i).Key);
+                if(_inventory.items[_inventory.items.ElementAt(i).Key] > 1) {
+                    _slots[i].amountText.text = "" + _inventory.items[_inventory.items.ElementAt(i).Key];
+                }
+            } else {
+                _slots[i].ClearSlot();
+            }
+        }
+    }
+}