I always assumed that sheets had a child-parent relationship with the
window they were attached to. In my little test, calling -parentWindow
on the sheet returns nil. The "parent" window does not have any child
windows but -attachedSheet does return the sheet.
As for why this matters, I was trying to determine if a window was a
sheet. While -isSheet seems to work, if you read the documentation
you'll see that it's defined rather oddly; it would probably be more
accurately named -wasEverASheet. Thus, I was hoping to instead to get
the parent's attached sheet and compare it to the current window. In
the end not a big deal. My main concern is that -isSheet seems to
leaves the door open for some odd edge cases.
Thanks,
Paul Kim
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