Gold Earned in a Session

[Helminthophobe]

I've written a small, personal addon that deals with gold and mail to be sent to my bank toon. I've run into a little problem and I'm stuck. The addon is a small frame that shows a tooltip with my current gold and the amount of gold I have gained or lost that session along with some other information.

The XML has the following:

<OnEnter>
  tooltip()
</OnEnter>

This is my basic code:

local startgold = GetMoney()

function  tooltip()
  local money = GetMoney()
  GameTooltip:SetOwner(frame, "ANCHOR_NONE")
  GameTooltip:SetPoint("TOPLEFT", "frame", "BOTTOMLEFT")
  GameTooltip:AddLine("Title", .4,.7,.8)
  GameTooltip:AddDoubleLine("Current Gold:", GetCoinTextureString(money))
  if startgold >= money then
    local sessiongold = startgold - money
    GameTooltip:AddDoubleLine("Session Gold:", GetCoinTextureString(sessiongold))
  else
    local sessiongold = money - startgold
    GameTooltip:AddDoubleLine("Session Gold:", GetCoinTextureString(sessiongold))
  end
  GameTooltip:Show()
end

I simplified the code for posting here. My variables and functions are named a little better in the actual code.

The problem is "startgold" is nil when the addon loads. I've tried to put it in the XML in <OnLoad>. I've tried to use events like ADDON_LOADED and PLAYER_ENTERING_WORLD but none seem to work. I've downloaded a couple mods that do this already but being a beginner at programming, I have trouble following their code. Can someone point me in the right direction? Any help would be greatly appreciated.

[Gendr]

http://paste.wowace.com/opw3dgzay601furj/

[Helminthophobe]

Thanks for the reply Gendr but that still gives me a nil value for "startgold ". I just used OnUpdate, and if "startgold" was nil, it would try to GetMoney() until it was no longer nil. I'm not sure if that is the best solution but it's a functioning solution.

[numein]

Just wait until PLAYER_ENTERING_WORLD triggers before you call GetMoney(), and it should be fine. It doesn't work before the event...

If you don't need saved variables, watch for PLAYER_ENTERING_WORLD and call GetMoney() from the OnEvent function ...

[Seerah]

Just to clarify, PEW (PLAYER_ENTERING_WORLD) still works for using saved variables.

[Helminthophobe]

I tried the OnEvent function with PLAYER_ENTERING_WORLD and it still came back as nil, which made me think it had to do with the order of things loading...

[Seerah]

What does your code look like when using it after PEW?

[Helminthophobe]

It looks different now since I'm using OnUpdate but here is the basics of what I had...

function OnLoad(frame)
  frame:RegisterEvent("PLAYER_ENTERING_WORLD")
end

function OnEvent(frame, event, ...)
  if event == "PLAYER_ENTERING_WORLD" then
    startgold = GetMoney()
  end
end

function  tooltip()
  local money = GetMoney()
  GameTooltip:SetOwner(frame, "ANCHOR_NONE")
  GameTooltip:SetPoint("TOPLEFT", "frame", "BOTTOMLEFT")
  GameTooltip:AddLine("Title", .4,.7,.8)
  GameTooltip:AddDoubleLine("Current Gold:", GetCoinTextureString(money))
  if startgold >= money then
    local sessiongold = startgold - money
    GameTooltip:AddDoubleLine("Session Gold:", "-" .. GetCoinTextureString(sessiongold))
  else
    local sessiongold = money - startgold
    GameTooltip:AddDoubleLine("Session Gold:", "+" .. GetCoinTextureString(sessiongold))
  end
  GameTooltip:Show()
end