[zork]

I use a similar approach in rLib
https://github.com/zorker/rothui/blo...b/core.lua#L39

--rLib:RegisterCallback
function rLib:RegisterCallback(event, callback, ...)
  if not self.eventFrame then
    self.eventFrame = CreateFrame("Frame")
    function self.eventFrame:OnEvent(event, ...)
      for callback, args in next, self.callbacks[event] do
        callback(args, ...)
      end
    end
    self.eventFrame:SetScript("OnEvent", self.eventFrame.OnEvent)
  end
  if not self.eventFrame.callbacks then self.eventFrame.callbacks = {} end
  if not self.eventFrame.callbacks[event] then self.eventFrame.callbacks[event] = {} end
  self.eventFrame.callbacks[event][callback] = {...}
  self.eventFrame:RegisterEvent(event)
end