[kurapica.igas]

I modify the code with my lib, if I use thread to call the myOnTooltipSetItem and make it wait until next OnUpdate, I get the require material and level texts.

So those text aren't generated together, we need a little delay to get all the result.

Scorpio "Test" ""
 
tt_frame = tt_frame or CreateFrame("GameTooltip", "MuffinItemCacheTooltip", UIParent, "GameTooltipTemplate")
 
__Async__()  -- mark the function as thread
function myOnTooltipSetItem(self, arg1, arg2, arg3)
    Next()  -- wait for the next OnUpdate
    
    print("myOnTooltipSetItem", arg1, arg2, arg3)
    local item_name, item_link = self:GetItem()
 
    if(not item_link) then 
        print("no item link, returning", item_name, item_link);
        return;
    end;
 
    local item_id = tonumber(string.match(item_link, "item:([%d]+):"))
    local printable = gsub(item_link, "\124", "\124\124");
    print(item_name, item_link, printable,  item_id)
 
    local tt = {}
 
    for i=1,tt_frame:NumLines() do
        local textLeft =  _G["MuffinItemCacheTooltipTextLeft"..i]:GetText()
        local textRight = _G["MuffinItemCacheTooltipTextRight"..i]:GetText()
        table.insert(tt, textLeft)
        table.insert(tt, textRight)
    end
 
    self:Hide();
 
    print("item id:", "   ", item_id, table.concat(tt," "))
 
 
end
tt_frame:SetScript("OnTooltipSetItem", myOnTooltipSetItem)
 
function TestTT(p_item_id)
   print("----------------")
   tt_frame:SetOwner(UIParent,"ANCHOR_NONE")
   tt_frame:SetItemByID(p_item_id)
 
end
 
TestTT(49112)

You may use the C_Timer.After to do the trick.