adam@0: local _, AskMrRobot = ...
adam@0: 
adam@0: local unresolvedItemIds = {}
adam@0: 
adam@0: -- Create a new class that inherits from a base class
adam@0: function AskMrRobot.inheritsFrom( baseClass )
adam@0: 
adam@0:     -- The following lines are equivalent to the SimpleClass example:
adam@0: 
adam@0:     -- Create the table and metatable representing the class.
yellowfive@11:     local new_class = { }
adam@0: 
adam@0:     -- Note that this function uses class_mt as an upvalue, so every instance
adam@0:     -- of the class will share the same metatable.
adam@0:     --
adam@0:   --   function new_class:create(o)
adam@0:   --   	o = o or {}
adam@0: 		-- setmetatable( o, class_mt )
adam@0: 		-- return o
adam@0:   --    end
adam@0: 
adam@0:     -- The following is the key to implementing inheritance:
adam@0: 
adam@0:     -- The __index member of the new class's metatable references the
adam@0:     -- base class.  This implies that all methods of the base class will
adam@0:     -- be exposed to the sub-class, and that the sub-class can override
adam@0:     -- any of these methods.
adam@0:     --
adam@0:     if baseClass then
adam@0:         setmetatable( new_class, { __index = baseClass } )
adam@0:     end
adam@0: 
adam@0:     return new_class
adam@0: end
adam@0: 
adam@0: local itemInfoFrame = nil;
adam@0: 
adam@0: local function onGetItemInfoReceived(arg1, arg2, arg3)
adam@0: 	-- since wow is awesome, it doesn't tell us *which* item id was just resolved, so we have to look at them all
adam@0: 	for itemId, callbacks in pairs(unresolvedItemIds) do
adam@0: 		-- attempt to get the item info AGAIN
adam@0: 		local a, b, c, d, e, f, g, h, i, j, k = GetItemInfo(itemId)
adam@0: 		-- if we got item info...
adam@0: 		if a then
adam@0: 			-- remove the callbacks from the list
adam@0: 			unresolvedItemIds[itemId] = nil
adam@0: 
adam@0: 			-- call each callback
adam@0: 			for i = 1, #callbacks do
adam@0: 				callbacks[i](a, b, c, d, e, f, g, h, i, j, k)
adam@0: 			end
adam@0: 		end
adam@0: 	end
adam@0: end
adam@0: 
adam@0: 
adam@0: function AskMrRobot.RegisterItemInfoCallback(itemId, callback)
adam@0: 	if not itemId then
adam@0: 		return
adam@0: 	end
adam@0: 
adam@0: 	if not itemInfoFrame then
adam@0: 	    waitFrame = CreateFrame("Frame","WaitFrame", UIParent);
adam@0: 	    waitFrame:RegisterEvent("GET_ITEM_INFO_RECEIVED")
adam@0: 	    waitFrame:SetScript("OnEvent", onGetItemInfoReceived);
adam@0: 	end
adam@0: 
adam@0: 
adam@0: 	-- get the list of registered callbacks for this particular item
adam@0: 	local list = unresolvedItemIds[itemId]
adam@0: 	-- if there was a list, then just add the callback to the list
adam@0: 	if list then
adam@0: 		tinsert(list, callback)
adam@0: 	else
adam@0: 		-- there wasn't a list, so make a new one with this callback
adam@0: 		unresolvedItemIds[itemId] = { callback }
adam@0: 	end
adam@0: end
adam@0: 
adam@0: 
adam@0: -- initialize the Frame class (inherit from a dummy frame)
adam@0: AskMrRobot.Frame = AskMrRobot.inheritsFrom(CreateFrame("Frame"))
adam@0: 
adam@0: -- Frame contructor
adam@0: function AskMrRobot.Frame:new(name, parentFrame, inheritsFrame)
adam@0: 	-- create a new frame (if one isn't supplied)
adam@0: 	local o = CreateFrame("Frame", name, parentFrame, inheritsFrame)
adam@0: 
adam@0: 	-- use the Frame class
adam@0: 	setmetatable(o, { __index = AskMrRobot.Frame })
adam@0: 
adam@0: 	-- return the instance of the Frame
adam@0: 	return o
adam@0: end