slime73/Lua-Event

Basic event system I have been using in my LÖVE games

Simple event library for Lua

Example usage:


-- create generic event handling function for a Cat class
function Cat:OnEvent(eventname, ...)
	if eventname == "MOUSE_SPAWNED" and not self.chasing then
		local mouse = ...
		self:ChaseMouse(mouse)
	end
end

-- use a regular function to process the event as well
function PrintWhenMouseSpawns(eventname, mouse)
	print("MOUSE SPAWNED! "..tostring(mouse))
end

function Mouse:initialize(x, y)
	self:Spawn(x, y)
	Event.Trigger("MOUSE_SPAWNED", self) -- trigger the event and pass any arguments you want
end

-- register the Cat class and function we created with the MOUSE_SPAWNED event
Event.Register(Cat, "MOUSE_SPAWNED")
Event.Register(PrintWhenMouseSpawns, "MOUSE_SPAWNED")


An 'object' (the thing you register) can be either a function or a table.
If it is a table, then when the event it's associated with is triggered, it will
first look for a function of the same name as the event in the table, and if it
doesn't find one it will fall back to the table's "OnEvent" method, if it exists.