gistfile1.lua

-- Multiple item-buttons per bagSlot
-- Untested and probably inefficient

function Implementation:UpdateSlot(event, bagID, slotID)
	-- Existing code here - maybe also exclusive filtering

	-- Cycle through containers which should be non-exclusive
	for id, container in pairs(self.contByID) do

		-- Find the button for the slot in the container, if any.
		-- could be faster to have a separate table with bag/slot-IDs as keys
		local button
		for i, btn in pairs(container.buttons) do
			if(btn.bagID == bagID and btn.slotID == slotID) then
				button = btn
				break
			end
		end

		-- Check if the item can go into the container
		if(container.filters:Check(item)) then
			if(not button) then -- Create a new button when necessary
				button = self.buttonClass:New(bagID, slotID)
				container:AddButton(button)
			end
			button:Update()
		elseif(button) then -- Didn't fit into container? Remove existing button
			container:RemoveButton(button)
			button:Free()
		end
	end

end