_film->LengthChange.connect (boost::bind(&FilmViewer::film_length_change, this));
_player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));
_film->LengthChange.connect (boost::bind(&FilmViewer::film_length_change, this));
_player->Change.connect (boost::bind (&FilmViewer::player_change, this, _1, _2, _3));