g_signal_connect(G_OBJECT(window), "delete_event",
G_CALLBACK(delete_event), NULL);
g_signal_connect(G_OBJECT(window), "key_press_event",
g_signal_connect(G_OBJECT(window), "delete_event",
G_CALLBACK(delete_event), NULL);
g_signal_connect(G_OBJECT(window), "key_press_event",