WoWInterface - Issue with ScrollFrame and Tooltips

Hello.

I have a main frame that contains a scrollFrame. This scrollFrame has an inner frame that contains a list of frames inside, and each of these children have a tooltip.

Everything is working fine, however I can see the tooltips of the children frames that aren't visible in that moment and are hidden out of my mainFrame.

Code:

local mainFrame = CreateFrame("Frame", "mainFrame ", UIParent, "UIPanelDialogTemplate") 

mainFrame:SetSize(1000, 600)

mainFrame:SetPoint("CENTER")

mainFrame:SetMovable(true)

mainFrame:EnableMouse(true)

mainFrame.Title:SetText("Example")

mainFrame:RegisterForDrag("LeftButton")

mainFrame:SetScript("OnDragStart", mainFrame.StartMoving)

mainFrame:SetScript("OnDragStop", mainFrame.StopMovingOrSizing)



local scrollFrame = _G.CreateFrame("ScrollFrame", "scrollFrame", mainFrame)

scrollFrame:SetPoint("TOPLEFT", 8, -26)

scrollFrame:SetPoint("BOTTOMRIGHT", mainFrame, "BOTTOMLEFT", 400, 10)

scrollFrame:EnableMouseWheel(true)



scrollFrame.scrollbar = CreateFrame("Slider", nil, scrollFrame, "UIPanelScrollBarTemplate") 

scrollFrame.scrollbar:SetPoint("TOPLEFT", scrollFrame, "TOPRIGHT", -1, -16) 

scrollFrame.scrollbar:SetPoint("BOTTOMLEFT", scrollFrame, "BOTTOMRIGHT", -1, 15) 

scrollFrame.scrollbar:SetValueStep(SCROLL_STEP_VALUE) 

scrollFrame.scrollbar.scrollStep = SCROLL_STEP_VALUE

scrollFrame.scrollbar:SetValue(1) 

scrollFrame.scrollbar:SetWidth(SLIDERUI_WIDTH)



local innerFrame = CreateFrame("Frame", "innerFrame", scrollFrame) 

innerFrame:SetSize(400, 3000)

innerFrame:SetPoint("TOPLEFT", 0, 0)

scrollFrame:SetScrollChild(innerFrame);



for i, element in ipairs(myElementList) do

        local childFrame = _G.CreateFrame("Button", "elementFrame"..i, innerFrame, "SecureActionButtonTemplate")

        childFrame:SetSize(400, 50)

        childFrame:SetPoint("TOP", 0, -(50 * (i - 1)))

        childFrame:SetScript("OnEnter", function(self) 

              local tooltip = LibStub('LibQTip-1.0'):Acquire("MyExampleToolTip", 1, "LEFT")

              self.tooltip = tooltip

              tooltip:AddLine(element)

              tooltip:SmartAnchorTo(self)

              tooltip:Show()

        end)

        childFrame:SetScript("OnLeave", function(self) 

              LibStub('LibQTip-1.0'):Release(self.tooltip)

        end)

end

As you can see with this code my mainFrame height is 600, the innerFrame height is 3000. If I scroll down to 1500, moving the mouse above or under my mainFrame, I see the tooltips, which means that the OnEnter event is being fired even if I cannot see the children frames.

How can I fix this?

Thanks.