close_button.clicked.connect (on_close_button_clicked);
key_press_event.connect (on_key_press_event);
movie_list.movie_activated.connect (on_movie_activated);
close_button.clicked.connect (on_close_button_clicked);
key_press_event.connect (on_key_press_event);
movie_list.movie_activated.connect (on_movie_activated);