Quincey - you were right.  The undo wasn't working because the windowController 
wasn't in the document's windowController array.   I used your concept of 
reusing the same windowController and it works.  

Thanks!



On Apr 30, 2010, at 4:12 PM, Quincey Morris wrote:

> On Apr 30, 2010, at 12:44, Brad Stone wrote:
> 
>> [dc openDocumentWith...] is opening the new doc and it'll be associated with 
>> the same windowController in the makeWindowControllers method. I see how 
>> you're doing that.  What I don't understand is the documentation for 
>> openDocumentWIthCOntentsOfURL doesn't mention anything about setting up the 
>> managedObjectContext or creating an undoManager and liking the MOC to a 
>> persistentStore.  This could just be me because I've been doing cocoa for 6 
>> months (programming in other languages for many years) but are you assuming 
>> all the stuff happens because openDocument... is called?
> 
> It happens in the NSPersistentDocument initialization -- the 
> NSDocumentController isn't involved beyond triggering the creation of the 
> document.
> 
>> Regarding the second part, yes I'm planning on setting up another 
>> windowController and when I show the second window moving the 
>> managedObjectContext over to it.  Both windows will have the same moc.  I 
>> had a similar problem with that: no undo and the saving didn't work but I 
>> put that on hold until I got the first part done.  I figure if it works in 
>> the preview window making it work in it's own window should be 
>> straightforward.
> 
> I believe that undo etc weren't working because your window controller wasn't 
> in the document's windowControllers array.
> 
> Note that if you're planning on allowing editing in both places, you have a 
> whole other set of issues to do with, to keep the two views of the document 
> contents in sync.
> 
> I'm back to thinking this might be a bit misguided from the UI point of view. 
> Presumably you have something in the preview window that lets you select 
> which document to preview. Why not just leave that much in the preview window 
> and just let that window open and close real document windows to do the 
> "preview"? What's the payoff from integrating both into a single window (and 
> is it big enough to justify the development time)?
> 
> 
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