OnMouseEnter problem

[Dero]

Hey there.
I've got a small problem with a piece of code.

Ive got a MainObject (MainObj) and on MouseEnter a ChildObject (ChildObj) with a Button in it (ChildButton) should show up. -Works fine so far
Now on MouseExit the ChildObject should get hidden again. - Works fine too

Now The Problem:
If i MouseEnter the ChildButton to click it, the MainObj registeres a MouseExit. This leads to a spamming of Hide/Show of the ChildObject. Is there anything i can do about this, so that the ChildObject keeps being open and only hides if i MouseExit the MainObj?

local MainObj = WINDOW_MANAGER:CreateControl("MainObj",TLW,CT_CONTROL)
MainObj:SetDimensions(200,100)
MainObj:SetAnchor(TOPLEFT,GuiRoot,TOPLEFT,0,0)
MainObj:SetMouseEnabled(true)
MainObj:SetHandler("OnMouseEnter",function()
    ChildObj:SetHidden(true)
end)
MainObj:SetHandler("OnMouseExit",function()
    ChildObj:SetHidden(true)
end)
            
local ChildObj = WINDOW_MANAGER:CreateControl("ChildObj",MainObj,CT_TEXTURE)
ChildObj:SetDimensions(ChildObj:GetParent():GetWidth(),ChildObj:GetParent():GetHeight()/2)
ChildObj:SetAnchor(BOTTOMLEFT,MainObj,BOTTOMLEFT,0,0)
ChildObj:SetTexture("")
ChildObj:SetDrawLayer(4)
ChildObj:SetColor(0,0,0,0.8)
ChildObj:SetHidden(true)
            
local ChildButton = WINDOW_MANAGER:CreateControl("ChildButton",ChildObj,CT_BUTTON)
ChildButton:SetDimensions(ChildButton:GetParent():GetHeight()-5,ChildButton:GetParent():GetHeight()-5)
ChildButton:SetAnchor(LEFT,ChildObj,LEFT,5,0)
ChildButton:SetNormalTexture("")
ChildButton:SetDrawLayer(4)
ChildButton:SetHandler("OnClicked",function()
    d("Clicked")
end)

[merlight]

There's an undocumented function IsMouseOver(control). I did a quick test and it seems it sees through control hierarchy, so it should return true as long as you move over controls inside the main one:

MainObj:SetHandler("OnMouseExit",function()
    if not IsMouseOver(MainObj) then
        ChildObj:SetHidden(true)
    end
end)

[Dero]

This function does not seem to work. When i use it, i get the following Error:

function expected instead of nil
stack traceback:
user:/X/X/Test.lua:25 in function '(anonymous)'

so this function seems to be unknown

[merlight]

Oops, MouseIsOver

[Dero]

Yep. found it just a few minutes ago .
Thx a lot! That helped and is working fine!