:SetTexture() only works for abilities on actionbar.

[wiMp]

I've been working on an AddOn that replaces the weapon icons temporary enchant frame to the icons of the weapon enchant.

The AddOn works fine, the only issue I've run into, is that I can only use the textures if I have the icons on my actionbar.

This is the code I've been working with:

local f = CreateFrame('GameTooltip', 'tempEnchantScanner', UIParent, 'GameTooltipTemplate')
f:SetOwner(UIParent, 'ANCHOR_NONE')
 
local _, playerClass = UnitClass("player")
 
local tempEnchants
if playerClass == "SHAMAN" then
    tempEnchants = {
        ["Earthliving"] = GetSpellTexture(51730),
        ["Flametongue"] = GetSpellTexture(8024),
        ["Frostbrand"]  = GetSpellTexture(8033),
        ["Rockbiter"]   = GetSpellTexture(8017),
        ["Windfury"]    = GetSpellTexture(8232),
    }
elseif playerClass == "ROGUE" then
    tempEnchants = {
        ["Mind-Numbing Poison"] = GetSpellTexture(5761),
        ["Crippling Poison"]    = GetSpellTexture(3408),
        ["Paralytic Poison"]    = GetSpellTexture(108215),
        ["Leeching Poison"]     = GetSpellTexture(108211),
        ["Deadly Poison"]       = GetSpellTexture(2823),
        ["Wound Poison"]        = GetSpellTexture(8679),
    }
end
 
 
local function getTempEnchantTextureOnSlotId(slotid)
    local found
    f:SetInventoryItem("player",slotid)
    for i = 1,f:NumLines() do
        local text = _G["tempEnchantScannerTextLeft"..i]:GetText()
            for k,v in pairs(tempEnchants) do
            if strmatch(text,k) then
                found = v
            end
        end
    end
    return found
end
 
 
hooksecurefunc('TemporaryEnchantFrame_Update', function(self,...)
    local mh,_,_,oh = ...
    local mhtexture = getTempEnchantTextureOnSlotId(16)
    local ohtexture = getTempEnchantTextureOnSlotId(17)
    
    if mh and oh and mhtexture and ohtexture then 
        TempEnchant2Icon:SetTexture(mhtexture)
        TempEnchant1Icon:SetTexture(ohtexture)
    elseif mh and not oh and mhtexture then
        TempEnchant1Icon:SetTexture(mhtexture)
    elseif oh and not mh and ohtexture then
        TempEnchant1Icon:SetTexture(ohtexture)
    end
end)

I'm relatively new at writing AddOns, so any tips or criticism is appreciated.