Now uses events and a proper check

diff --git a/oUF_BarFader/oUF_BarFader.lua b/oUF_BarFader/oUF_BarFader.lua
index 91fcb73..da7d95f 100644
--- a/oUF_BarFader/oUF_BarFader.lua
+++ b/oUF_BarFader/oUF_BarFader.lua
@@ -1,32 +1,30 @@
 local function UpdateElement(self)
-	local notFull = UnitHealth('player') ~= UnitHealthMax('player') or
-		(UnitPowerType("player") == 1 and UnitMana('player') > 0) or
-		(UnitPowerType("player") ~= 1 and UnitMana('player') ~= UnitManaMax('player'))
+	if(self.BarFade) then
+		local notFull = UnitHealth('player') ~= UnitHealthMax('player') or
+			(UnitPowerType("player") == 1 and UnitMana('player') > 0) or
+			(UnitPowerType("player") ~= 1 and UnitMana('player') ~= UnitManaMax('player'))

-	if(notFull) then
-		self:SetAlpha(1)
-	elseif(UnitAffectingCombat('player')) then
-		self:SetAlpha(1)
-	elseif(UnitExists('target')) then
-		self:SetAlpha(1)
-	elseif(self.Castbar) then
-		self:SetAlpha(self.Castbar.casting and 1 or (self.BarFadeAlpha or 0.25))
-	else
-		self:SetAlpha(self.BarFadeAlpha or 0.25)
+		if(notFull) then
+			self:SetAlpha(1)
+		elseif(UnitAffectingCombat('player')) then
+			self:SetAlpha(1)
+		elseif(UnitExists('target')) then
+			self:SetAlpha(1)
+		elseif(self.Castbar) then
+			self:SetAlpha(self.Castbar.casting and 1 or (self.BarFadeAlpha or 0.25))
+		else
+			self:SetAlpha(self.BarFadeAlpha or 0.25)
+		end
 	end
 end

 oUF:RegisterInitCallback(function(self)
-	local unit = self.unit
-	if(self.BarFade) then
-		local total = 0
-		local event = CreateFrame('Frame')
-		event:SetScript('OnUpdate', function(_, elapsed)
-			total = total + elapsed
-			if(total > 0.25) then
-				UpdateElement(self)
-				total = 0
-			end
-		end)
-	end
-end)
+	local event = CreateFrame('Frame')
+	event:SetScript('OnEvent', function() UpdateElement(self) end)
+	event:RegisterEvent('PLAYER_REGEN_ENABLED')
+	event:RegisterEvent('PLAYER_REGEN_DISABLED')
+	event:RegisterEvent('PLAYER_TARGET_CHANGED')
+	event:RegisterEvent('UNIT_HEALTH')
+	event:RegisterEvent('UNIT_MANA')
+	event:RegisterEvent('PLAYER_LOGIN')
+end)
\ No newline at end of file