cut and paste: how to use declareTypes:owner:?
cut and paste: how to use declareTypes:owner:?
- Subject: cut and paste: how to use declareTypes:owner:?
- From: Niko Matsakis <email@hidden>
- Date: Thu, 5 Jun 2003 17:05:51 -0400 (EDT)
I see that I can when I send the 'declareTypes:owner:' message to the
pasteboard, I can send in an object as the owner of the data.
The text says that this way I can post only the representations of the
data I expect to be used, but will have the option to convert to the other
representations by being sent a pasteboard:provideDataForType: message
when it is needed. This sounds like something I want to do.
I am scared, though, of providing an owner! The documentation warns
that, "It should not, for example, be the NSView that displays the data
if that NSView is in a window that might be closed."
What the heck! What window might not be closed? I mean, the application
could quit before the data is pasted! I must be missing something because
this scheme seems guaranteed to give you a stale pointer.
In this case, the owner I want to provide is a field of the document
being copied from, so it will live as long as the document does, but I
can't see what would prevent the user from closing the document.
niko
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