Scriptum/Assets/Scripts/Inventory/InventoryPanelController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;
using System; 

public class InventoryPanelController : BasePanelController
{

    public override void CloseOnClick()
    {
        Destroy(gameObject);  // destroy panel
        GameObject panel = FindObjectOfType<ChestPanelController>()?.gameObject;
        if(panel != null) Destroy(panel);
        GameObject.FindObjectOfType<EquipmentManager>()?.ClosePanel();
        InventoryManager.Instance.GetComponent<InventoryManager>().ClosePanel();
    }

    public void Setup(GameObject _inventory, Dictionary<int, Item> _items)
    {
        _instance = _inventory;

        base.Setup(_items);
    }

    void Update()
    {
        if (Input.GetKeyDown("i"))
        {
            Destroy(gameObject);  // destroy panel

            InventoryManager.Instance.GetComponent<InventoryManager>().ClosePanel();
        }
    }

    protected override ISlot SetupSlot(int key, GameObject _parent)
    {
        InventorySlot _tmpSlot = Instantiate(_blankSlot, _parent.transform.position, Quaternion.identity).GetComponent<InventorySlot>();
        _tmpSlot.transform.SetParent(_parent.transform);

        _tmpSlot.SetupSlot(key, null, this);

        return _tmpSlot;
    }

    // public void Drop(ItemSlot<InventoryPanelController> dropItemSlot)
    // {
    //     if(dropItemSlot.CanReceiveItem(draggedSlot.Item) && draggedSlot.CanReceiveItem(dropItemSlot.Item))
    //     {
    //         EquippableItem dragItem = draggedSlot.Item as EquippableItem;
    //         EquippableItem dropItem = dropItemSlot.Item as EquippableItem;

    //         // for changing chest to evuuipment or onventory panel !!!!

    //         if(draggedSlot is EquipmentSlot)
    //         {
    //             if(dragItem != null) dragItem.Unequip(this);
    //             if(dropItem != null) dropItem.Equip(this);
    //         }

    //         if(dropItemSlot is EquipmentSlot)
    //         {
    //             if(dragItem != null) dragItem.Equip(this);
    //             if(dropItem != null) dropItem.Unequip(this);
    //         }

    //         Item draggedItem = draggedSlot.Item;  // remember temporary currently dragged item

    //         draggedSlot.Item = dropItemSlot.Item;
    //         dropItemSlot.Item = draggedItem;

    //         // update items position in chest slots
    //         // - after close paned - items dont reset its positions
    //         _inventory.GetComponent<InventoryManager>().SetItemOnPosition(draggedSlot.Number, draggedSlot.Item);
    //         _inventory.GetComponent<InventoryManager>().SetItemOnPosition(dropItemSlot.Number, dropItemSlot.Item);
    //     }
    // }

}