- (void)windowDidLoad
{
    // Sent when the controller's window has been loaded from the nib
    [super windowDidLoad];
    NSWindow* window = self.window;

    // Make sure this window controller is in the responder chain
    NSResponder* nextResponder = window.nextResponder;  // get our window's next responder
    if (nextResponder!=self)
        {
        // running earlier OS X that does not include the window controller in the chain: patch us in
        self.nextResponder = nextResponder;
        window.nextResponder = self;
        }