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I am writing an application that loads a document from a file and displays it  
in a window. My app has a controller object and document objects. Both  
controller and document are instances of Object subclasses. Each document  
instance has an outlet to its respective window and is the delegate for that  
window.

Here's my problem: I want to free my document object when the user closes its  
respective window. To do this, I have the following code in my windowWillClose:  
method in Document.m:

- windowWillClose:sender
{
    [controller rmDoc:self];

	...
}

in my -rmDoc method in Controller.m, I do:

- rmDoc:aDoc
{
    // docList is a List containing my document objects	
    [[docList removeObject:aDoc] free];

	...
}

However, since my document object is freed, its window is left without a  
delegate. What to do?

I suppose I can have the controller be each window's delegate, but I prefer to  
have each document be the delegate instead. The reason is mainly because each  
window may have different max and min sizes--information the document instance  
knows about.

What are possible solutions to this problem? Any suggestions appreciated. Thank  
you in advance.

--Edward Lau
edlau@chaos.mitl.com