+ _slider->Bind (wxEVT_SCROLL_THUMBTRACK, boost::bind (&FilmViewer::slider_moved, this, false));
+ _slider->Bind (wxEVT_SCROLL_PAGEUP, boost::bind (&FilmViewer::slider_moved, this, false));
+ _slider->Bind (wxEVT_SCROLL_PAGEDOWN, boost::bind (&FilmViewer::slider_moved, this, false));
+ _slider->Bind (wxEVT_SCROLL_CHANGED, boost::bind (&FilmViewer::slider_moved, this, true));