hotbar

Assets/Scripts/PlayerController.cs

@@ -1,21 +1,24 @@
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
+using System;
 
 public class PlayerController : MonoBehaviour
 {
 
+  public static Action OnActiveSlotChanged;
   public Item testItem1;
   public Item testItem2;
 
-  [SerializeField] private int hotbarSlotCount = 9;
-  [SerializeField] private int activeHotbarSlot = 0;
+  public int hotbarSlotCount = 9;
+  public int activeHotbarSlot = 0;
   [SerializeField] private Inventory playerInventory;
 
   // Start is called before the first frame update
   void Start()
   {
     playerInventory = GetComponent<Inventory>();
+    GuiManager.Instance.OpenPanel("Hotbar");
   }
 
   // Update is called once per frame
@@ -33,6 +36,7 @@ public class PlayerController : MonoBehaviour
       {
         activeHotbarSlot = 0;
       }
+      OnActiveSlotChanged?.Invoke();
     }
 
     if (Input.GetKeyDown(KeyCode.Tab))

Assets/Scripts/UI/GuiManager.cs

@@ -28,14 +28,13 @@ public class GuiManager : MonoBehaviour
 
   private void Awake()
   {
-    if (instance == null)
+    if (instance != null && instance != this)
     {
-      instance = this;
-    }
-    else
-    {
-      Destroy(gameObject);
+      Destroy(this.gameObject);
+      return;
     }
+    instance = this;
+    DontDestroyOnLoad(gameObject);
   }
 
 
@@ -65,6 +64,10 @@ public class GuiManager : MonoBehaviour
     {
       OpenPanel(panel);
     }
+    else
+    {
+      Debug.Log("Panel not found: " + name);
+    }
   }
 
   public void OpenPanel(GuiPanel panel)
@@ -73,7 +76,7 @@ public class GuiManager : MonoBehaviour
     if (!panel.gameObject.activeSelf)
     {
       panel.gameObject.SetActive(true);
-      panel.OnClose();
+      panel.OnOpen();
       Debug.Log("Open Panel");
       return;
     }

Assets/Scripts/UI/HotbarSlotUI.cs

@@ -0,0 +1,56 @@
+using System.Collections;
+using UnityEngine.UI;
+using System.Collections.Generic;
+using UnityEngine;
+using TMPro;
+public class HotbarSlotUI : MonoBehaviour
+{
+  public int slotIndex;
+
+  private PlayerController playerController;
+
+  private InventoryItem invItem;
+
+  [SerializeField] private Image border;
+  [SerializeField] private Image image;
+  [SerializeField] private TextMeshProUGUI quantityText;
+
+  private void Start()
+  {
+    playerController = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerController>();
+    PlayerController.OnActiveSlotChanged += CheckSelectedSlot;
+    CheckSelectedSlot();
+  }
+
+  private void CheckSelectedSlot()
+  {
+    if (playerController.activeHotbarSlot == slotIndex)
+    {
+      border.gameObject.SetActive(true);
+    }
+    else
+    {
+      border.gameObject.SetActive(false);
+    }
+  }
+
+  public void SetInventoryItem(InventoryItem newInvItem)
+  {
+    invItem = newInvItem;
+    UpdateSlot();
+  }
+
+  private void UpdateSlot()
+  {
+    image.sprite = invItem?.item?.sprite ?? null;
+    quantityText.SetText(invItem?.count.ToString() ?? "");
+    if (image.sprite == null)
+    {
+      image.color = new Color(0, 0, 0, 0);
+    }
+    else
+    {
+      image.color = Color.white;
+    }
+  }
+}

Assets/Scripts/UI/HotbarSlotUI.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 12c5ff2bade265a499f7b2d983c6508c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UI/HotbarUI.cs

@@ -0,0 +1,52 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class HotbarUI : GuiPanel
+{
+  [SerializeField] private GameObject hotbarSlotPrefab;
+  private List<HotbarSlotUI> slots = new List<HotbarSlotUI>();
+  private Inventory playerInventory;
+  private PlayerController playerController;
+  private int hotbarSlotCount = 9;
+
+  private void Start()
+  {
+    Inventory.OnPlayerInventoryChanged += UpdateSlots;
+  }
+  public override void OnOpen()
+  {
+    if (slots.Count == 0)
+    {
+      playerInventory = GameObject.FindGameObjectWithTag("Player").GetComponent<Inventory>();
+      playerController = GameObject.FindGameObjectWithTag("Player").GetComponent<PlayerController>();
+      hotbarSlotCount = playerController.hotbarSlotCount;
+      CreateSlots();
+    }
+    UpdateSlots();
+  }
+
+  public override void OnClose()
+  {
+  }
+
+  private void CreateSlots()
+  {
+    for (int i = 0; i < hotbarSlotCount; i++)
+    {
+      HotbarSlotUI newSlot = Instantiate(hotbarSlotPrefab, Vector3.zero, Quaternion.identity, transform).GetComponent<HotbarSlotUI>();
+      newSlot.slotIndex = i;
+      slots.Add(newSlot);
+    }
+  }
+
+  private void UpdateSlots()
+  {
+    for (int i = 0; i < slots.Count; i++)
+    {
+      slots[i].SetInventoryItem(playerInventory.items[i] ?? null);
+    }
+  }
+
+}

Assets/Scripts/UI/HotbarUI.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: daff4f23cf5534f478f13df54b51124a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UI/InventoryUI.cs

@@ -12,12 +12,15 @@ public class InventoryUI : GuiPanel
 
   private void Start()
   {
-    playerInventory = GameObject.FindGameObjectWithTag("Player").GetComponent<Inventory>();
     Inventory.OnPlayerInventoryChanged += UpdateSlots;
-    CreateSlots();
   }
   public override void OnOpen()
   {
+    if (slotUIList.Count == 0)
+    {
+      playerInventory = GameObject.FindGameObjectWithTag("Player").GetComponent<Inventory>();
+      CreateSlots();
+    }
     UpdateSlots();
   }