Scriptum/Assets/Scripts/SettingsButton.cs

using System.Collections;  
using System.Collections.Generic;  
using UnityEngine;  
namespace GUI_Scripts
{
    public class SettingsButton:MonoBehaviour
    {
        public GameObject Panel;  

        public void manageWindow()
        {
            if(!InventoryManager.Instance.isOpen && !EquipmentManager.Instance.isOpen)
                this.OpenPlayerPanel();
            else
                this.ClosePlayerPanel();

        }
        public void OpenPlayerPanel() {  

            if(!InventoryManager.Instance.isOpen || !EquipmentManager.Instance.isOpen)
            {
                InventoryManager.Instance.OpenPanel();
                EquipmentManager.Instance.OpenPanel();
            }
            
        }  
        
        public void ClosePlayerPanel() {  
            if(InventoryManager.Instance.isOpen || EquipmentManager.Instance.isOpen)
            {
                InventoryManager.Instance.ClosePanel();
                EquipmentManager.Instance.ClosePanel(); 
            }
        } 

        public void OpenAssociatedPanel()
        {
            if (Panel != null) {
                if (Panel.active == false)
                {
                    //bool isActive = Panel.activeSelf;  
                    Panel.SetActive(true);
                }
                else
                {
                    Panel.SetActive(false);
                }
            }  
        }

        public void CloseAssociatedPanel()
        {
            if (Panel != null) {
                Panel.SetActive(false);  
            }  
        }
    }
}