Thank you, that's all good advice.

> On May 16, 2018, at 00:26 , Rick Mann <[email protected]> wrote:
> 
> I'm working on a little NSDocument-based app. The documents are packages (a 
> directory containing multiple files). One of the operations is to import a 
> music file into the document, which should copy the music file into the 
> package, and set it as the track for the document.
> 
> Undoing this operation is somewhat complex (where do I store the previous 
> track if any?). So for now, I want to ignore undo.
> 
> But I'm not sure how to copy the track file into the package. For example, 
> what if it's an untitled document, and therefore has no package on disk? The 
> action should result in a dirty document that isn't committed to disk until 
> the next save (be it automatic or manual).
> 
> Can this even be done without undo?
> 
> Along those lines, how do I mark a document as dirty after some change, 
> without making the change undoable?
> 
> Thanks,
> 
> -- 
> Rick Mann
> [email protected]
> 
> 
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-- 
Rick Mann
[email protected]


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