void QTMovieVisualContextPriv::setMovie(PassRefPtr<QTMovie> movie)
{
    if (movie == m_movie)
        return;

    if (m_movie) {
        SetMovieVisualContext(m_movie->getMovieHandle(), 0);
        m_movie = 0;
    }

    if (movie)
        OSStatus status = SetMovieVisualContext(movie->getMovieHandle(), m_visualContext);
    
    m_movie = movie;
}