Question

I have a Cocoa document-based app that (currently at least) functions as a basic text editor. It saves .txt, .rtf, and .rtfd, and loads those plus .doc and .docx. If I open a .doc or .docx file and edit it, then try to close, it reminds me to save, but the save option doesn’t do anything since the application is only a viewer for those types of files. How can I make that function as “Save As” for types that can only be viewed, like .doc and .docx?

Answer 1

Override the saveDocumentWithDelegate::: in your customised NSDocument to the following:

- (void)saveDocumentWithDelegate:(id)delegate didSaveSelector:(SEL)didSaveSelector contextInfo:(void *)contextInfo
{
  if (delegate != nil)
  {
    // use delegate or contextInfo to decide what operation you need to use...

    [self runModalSavePanelForSaveOperation:NSSaveAsOperation
                                   delegate:delegate 
                            didSaveSelector:didSaveSelector 
                                contextInfo:contextInfo];
  }
  else
  {
    [super saveDocumentWithDelegate:delegate 
                    didSaveSelector:didSaveSelector
                        contextInfo:contextInfo];
  }
}

By default the delegate is either an NSWindow on window close or NSDocumentController if you quit the application and the controller enumerates the windows for reviewing changes.