_play_button->Bind (wxEVT_TOGGLEBUTTON, boost::bind (&FilmViewer::play_clicked, this));
_timer.Bind (wxEVT_TIMER, boost::bind (&FilmViewer::timer, this));
_back_button->Bind (wxEVT_LEFT_DOWN, boost::bind (&FilmViewer::back_clicked, this, _1));
_play_button->Bind (wxEVT_TOGGLEBUTTON, boost::bind (&FilmViewer::play_clicked, this));
_timer.Bind (wxEVT_TIMER, boost::bind (&FilmViewer::timer, this));
_back_button->Bind (wxEVT_LEFT_DOWN, boost::bind (&FilmViewer::back_clicked, this, _1));