My question: will the 'this' parameter refer to the same object in the
superclass as it does in object A?
Yes
----- Original Message -----
From: "Danny Kodicek" <[EMAIL PROTECTED]>
To: "'Flashcoders mailing list'" <[email protected]>
Sent: Friday, March 16, 2007 2:48 PM
Subject: [Flashcoders] Super and this
Just a quick check, as I'm more used to Director's inheritance model than
Flash's!
I have an object A which extends B, which in turn extends MovieClip
Object B has a method 'fGetElementAt' which returns a movieclip
In A, I want to extend this by adding some extra code on top:
(leaving out declarations etc in the following:)
function fGetElementAt(tX, tY) {
tRet = super.fGetElementAt(tX, tY)
if (tRet == this) {
doSomethingElse()
}
return tRet
}
and the superclass version, just for sake of argument (obviously it's more
complicated than this):
function fGetElementAt (tX, tY) {
return this
}
My question: will the 'this' parameter refer to the same object in the
superclass as it does in object A?
Just to show where I'm coming from, to those who know Lingo, here's an
equivalent:
on mGetElementAt me, tX, tY
tRet = ancestor.mGetElementAt(tX, tY)
if (tRet = me) then
doSomethingElse
end if
end
and the ancestor version (again for the sake of argument)
on mGetElementAt me, tX, tY
return me
end
In this version, the if statement in the subclass would fail because the
variable 'me' refers to different objects in the two cases. In Lingo, I
can
avoid this happening by using
tRet = callAncestor(#mGetElementAt, me, tX, tY)
instead. So is super.function more like ancestor.function or more like
callAncestor(function)?
Hope that makes some sense!
Danny
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