GameScript.btnPreviousTabClick C# (CSharp) Method

    public void btnPreviousTabClick()
    {
        pnlShopCurrentTabPage -= 1;
        if (pnlShopCurrentTabPage < 0)
        {
            pnlShopCurrentTabPage = Convert.ToInt32(Math.Floor(Spil.GameData.Shop.Tabs.Count / 4d));
        }
        updateUIShop();
    }