g_signal_connect (self, "focus-in-event",
G_CALLBACK(on_focus_in), NULL);
g_signal_connect (self, "focus-out-event",
G_CALLBACK(on_focus_out), NULL);
g_signal_connect (self, "focus-in-event",
G_CALLBACK(on_focus_in), NULL);
g_signal_connect (self, "focus-out-event",
G_CALLBACK(on_focus_out), NULL);