[Duugu]

You're mixing up the UIFrameFade and UIFrameFadeIn functions.

finishedFunc is not an attribute of the frame object. Its a value within an additional fadeInfo table that is build inside the UIFrameFadeIn and UIFrameFadeOut functions or has to be passed as an argument with UIFrameFade.


Example for UIFrameFade:

function VoiceChatShineFadeIn()
	-- Fade in the shine and then fade it out with the ComboPointShineFadeOut function
	local fadeInfo = {};
	fadeInfo.mode = "IN";
	fadeInfo.timeToFade = 0.5;
	fadeInfo.finishedFunc = VoiceChatShineFadeOut;
	UIFrameFade(VoiceChatShine, fadeInfo);
end

function VoiceChatTalkers_FadeOut()
	local fadeInfo = {};
	fadeInfo.mode = "OUT";
	fadeInfo.timeToFade = .35;
	fadeInfo.startAlpha = 1;
	fadeInfo.endAlpha = 0;
	fadeInfo.finishedFunc = function() if ( #VOICECHAT_TALKERS > 0 ) then return end VoiceChatTalkers.buttons[1].button:SetAttribute("name", nil); VoiceChatTalkers.buttons[1]:Hide() VoiceChatTalkersSpeaker:Show() end;
	UIFrameFade(VoiceChatTalkers, fadeInfo);
	VoiceChatTalkers.visible = 0;
end

The UIFrameFade, UIFrameFadeIn, and UIFrameFadeOut implementations to clarify this:

-- Generic fade function
function UIFrameFade(frame, fadeInfo)
	if (not frame) then
		return;
	end
	if ( not fadeInfo.mode ) then
		fadeInfo.mode = "IN";
	end
	local alpha;
	if ( fadeInfo.mode == "IN" ) then
		if ( not fadeInfo.startAlpha ) then
			fadeInfo.startAlpha = 0;
		end
		if ( not fadeInfo.endAlpha ) then
			fadeInfo.endAlpha = 1.0;
		end
		alpha = 0;
	elseif ( fadeInfo.mode == "OUT" ) then
		if ( not fadeInfo.startAlpha ) then
			fadeInfo.startAlpha = 1.0;
		end
		if ( not fadeInfo.endAlpha ) then
			fadeInfo.endAlpha = 0;
		end
		alpha = 1.0;
	end
	frame:SetAlpha(fadeInfo.startAlpha);

	frame.fadeInfo = fadeInfo;
	frame:Show();

	local index = 1;
	while FADEFRAMES[index] do
		-- If frame is already set to fade then return
		if ( FADEFRAMES[index] == frame ) then
			return;
		end
		index = index + 1;
	end
	tinsert(FADEFRAMES, frame);
	frameFadeManager:SetScript("OnUpdate", UIFrameFade_OnUpdate);
end

-- Convenience function to do a simple fade in
function UIFrameFadeIn(frame, timeToFade, startAlpha, endAlpha)
	local fadeInfo = {};
	fadeInfo.mode = "IN";
	fadeInfo.timeToFade = timeToFade;
	fadeInfo.startAlpha = startAlpha;
	fadeInfo.endAlpha = endAlpha;
	UIFrameFade(frame, fadeInfo);
end

-- Convenience function to do a simple fade out
function UIFrameFadeOut(frame, timeToFade, startAlpha, endAlpha)
	local fadeInfo = {};
	fadeInfo.mode = "OUT";
	fadeInfo.timeToFade = timeToFade;
	fadeInfo.startAlpha = startAlpha;
	fadeInfo.endAlpha = endAlpha;
	UIFrameFade(frame, fadeInfo);
end