Basic help with FauxScrollFrame

[Duugu]

I have some really simple code:

local scf = CreateFrame("SCROLLFRAME", "TestScrollFrame", UIParent, "FauxScrollFrameTemplate")
scf:SetPoint("CENTER", "UIParent", "CENTER", 0, 0)
scf:SetWidth(100)  
scf:SetHeight(100) 
scf:SetBackdrop({bgFile="Interface\\DialogFrame\\UI-DialogBox-Background", edgeFile="", tile = false, tileSize = 0, edgeSize = 0, insets = { left = 0, right = 0, top = 0, bottom = 0 }})
scf:SetScript("OnVerticalScroll", function() DEFAULT_CHAT_FRAME:AddMessage("test") end)
scf:EnableMouse(true)
scf:Show()

This should show a frame and the message "test" on any scroll event. The problem is, the frame is show ... but there's no message.

Maybe I'm just blind ... or stupid ... or both ... but I absolutely can't see why there's no message shown.
Could someone please give me a hint what's wrong with this?

[Mera]

try something like that in wowlua

local scf = CreateFrame("ScrollFrame", "TestScrollFrame", UIParent, "UIPanelScrollFrameTemplate")
local scc = CreateFrame("Frame", "TestScrollChild", scf)
scf:SetScrollChild(scc)
scf:SetPoint("CENTER", "UIParent", "CENTER", 0, 0)
scc:SetPoint("TOPLEFT", "TestScrollFrame", "TOPLEFT", 0, 0)
scf:SetWidth(100)  
scf:SetHeight(100) 
scc:SetWidth(300)  
scc:SetHeight(300) 
scf:SetHorizontalScroll(-50)
scf:SetVerticalScroll(50)
scf:SetBackdrop({bgFile="Interface\\DialogFrame\\UI-DialogBox-Background", edgeFile="", tile = false, tileSize = 0, edgeSize = 0, insets = { left = 0, right = 0, top = 0, bottom = 0 }})
scf:SetScript("OnVerticalScroll", function() DEFAULT_CHAT_FRAME:AddMessage("test") end)
scf:EnableMouse(true)
scf:Show()
scc:Show()

[Duugu]

Hm. Ok. Thanks a lot. This is working.

Nevertheless I still would love to know why my code isn't working.

[Shirik]

Why do you want to use FauxScrollFrame? It is, by far, one of the worst tools to use and you almost always have a better way of doing it.

To quote purl:

(12:46:28) (purl) i guess fauxscrollframe is one of the first Lua/XML systems written by Blizzard for the WoW user interface. Its learning curve resembles an inverted L, and Zootfizzle hates it. Along with cogs, it is in the top five on his "dead to me" list.

[Duugu]

I don't want to.
I just would like to know what's wrong with my code. It's just general curiosity.

[Mera]

Originally Posted by Duugu I don't want to. I just would like to know what's wrong with my code. It's just general curiosity.

difficult to say I don't know myself because on paper it looks fine but I see you have a missing ScrollChild you have to set with SetScrollChild, not sure but it is possible to be required to scroll in a defined area because your code actually doesnt let us scroll something so you can setup any event OnVerticalScroll nothing will happen else ingame it doesn't spawn error so I guess it is about a missing anchor point, width or a behaviour with the changes made by Blizzard upon the time and its restricted lua code, most recent addon's codes I have read are using UIPanelScrollFrameTemplate, haven't for FauxScrollFrame or just recently in cladhaire's book wow programming, it use to describe the use of FauxScrollFrame if you really need it go for it.

[Duugu]

In fact it's the missing ScrollChild.
Thanks again.