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Fires when dispatching an event.

(self, event, ...)

Arguments

self 
Frame - The registered widget.
event 
string - Name of the event.
... 
Variable arguments - The event payload, if any.

Details

Examples

Handling several events using if, elseif, else, end:

local frame = CreateFrame("Frame")
frame:SetScript("OnEvent", function(__, event, arg1, arg2, arg3, arg4)
	if event == "PLAYER_LOGIN" then
		print("Logging on")
	elseif event == "PLAYER_REGEN_DISABLED" then
		print("Entering combat")
	elseif event == "PLAYER_REGEN_ENABLED" then
		print("Leaving combat")
	elseif event == "UNIT_SPELLCAST_SENT" and arg1 == "player" and arg4 == 1459 then
		print("Casting arcane intellect")
	end
end)
frame:RegisterEvent("PLAYER_LOGIN")
frame:RegisterEvent("PLAYER_REGEN_DISABLED")
frame:RegisterEvent("PLAYER_REGEN_ENABLED")
frame:RegisterEvent("UNIT_SPELLCAST_SENT")

Handling several events using a lookup table:

local frame = CreateFrame("Frame")

function frame:PLAYER_LOGIN()
	print("Logging on")
end

function frame:PLAYER_REGEN_DISABLED()
	print("Entering combat")
end

function frame:PLAYER_REGEN_ENABLED()
	print("Leaving combat")
end

function frame:UNIT_SPELLCAST_SENT(unitID, __, __, spellID)
	if (unitID == "player" and spellID == 1459) then
		print("Casting arcane intellect")
    end
end

frame:SetScript("OnEvent", function(self, event, ...)
	self[event](self, ...)
end)

frame:RegisterEvent("PLAYER_LOGIN")
frame:RegisterEvent("PLAYER_REGEN_DISABLED")
frame:RegisterEvent("PLAYER_REGEN_ENABLED")
frame:RegisterEvent("UNIT_SPELLCAST_SENT")
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