On Jan 31, 2007, at 5:00 AM, David A. Lyons wrote:
On Jan 30, 2007, at 7:19 PM, Laurence Harris wrote:
"WindowRefs, MenuRefs and HIViewRefs are all HIObjectRefs
internally and can be cast appropriately." Don't forget to read
those headers.. er.. first sentences. ; )
Yes, I read this, but as I read it I don't see it addressing the
original question. I understand that an HIViewRef is an
HIObjectRef, a WindowRef is an HIObjectRef, and a MenuRef is an
HIObjectRef. "Can be cast appropriately" is kind of vague, but it
says to me you can cast WindowRefs, MenuRefs and HIViewRefs to
HIObjectRefs. But nothing in that says a WindowRef is an HIViewRef
or that you can casts WindowRefs to HIViewRefs. That may be the
case, but it doesn't follow from the statement above.
They aren't, and you can't. -- "Appropriately" means that you can
cast any of them to an HIObjectRef, and if you have an HIObjectRef
you can cast it to whatever more specific type you know it actually
is.
That's what I figured. However, the OP had asked "Are there ever
situations where one might have an HIObjectRef that's not an
HIViewRef?" The answer is yes, but that wasn't stated previously, and
it cannot be logically deduced from the statement quoted above.
Larry
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