Capture NSWindow tab events

This sounded like an interesting puzzle so I did a bit of experimenting with the following code:

-(void)doStuff {
    NSArray *theTabs = [myWindow tabbedWindows];
    NSMutableArray *tabDocs = [[NSMutableArray alloc] init];
    if([theTabs count] > 1) {
        for(NSInteger i = 0; i < [theTabs count]; i++) {
            [tabDocs addObject:[[NSDocumentController sharedDocumentController] documentForWindow:[theTabs objectAtIndex:i]]];
        }
    }
    NSArray *theDocuments = [[NSDocumentController sharedDocumentController] documents];
    NSLog(@"tabs %@ docs: %@",tabDocs, theDocuments);
}

I put this in the WindowController with its window named myWindow in an IBOutlet. I suspect a better place for this code would maybe be in the DocumentController.

When I run this, if I have one window with multiple tabs, the array of documents in theDocuments matches the documents in tabDocs. If a tabbed window is dragged out then the arrays no longer match. Maybe this can give you a clue for how to solve your problem.