Detect Value Change

This is a simple method for "watching" a data value in the skin (variable, measure or option) and taking action when the value changes.

function Initialize()
	Old = nil
	-- If the "Old" value starts as nil, the change action will always fire on the first update.
end

function Update()
	local New = SKIN:GetVariable('SomeVariable')
	-- or
	local New = SKIN:GetMeasure('SomeMeasure'):GetValue()
	-- or
	local New = SELF:GetOption('SomeOption')

	if Old ~= New then
		-- do stuff
		Old = New
	end
end