class MainWindowHandler:
    user_images = []
    spinner = None

    def use_spinner(function):
        @functools.wraps(function)    #robi take samaniny s __doc__ a __name__ funkcie - je to standart a pekne robit
        def inner(self, *args, **kwargs):           #self ide sem kedze je prvy argument funckie povodnej
            self.spinner.start()
            print("Spinning")
            result = function(self, *args, **kwargs)    #sem ho potom musime dodat tiez
            self.spinner.stop()
            return result
        return inner

    @use_spinner
    def register_user_image(self, image):
        self.user_images.append(image)

    def register_spinner(self, spinner):
        self.spinner = spinner
        spinner.stop()