Give this method an XOverlay that you've created from a videoSink. like: monitorOverlay.xoverlay = new XOverlay( videoSink );
the main Gtk struct
the main Gtk struct as a void*
Warning gtk_drawing_area_size is deprecated and should not be used in newly-written code. Use gtk_widget_set_size_request() instead. Sets the size that the drawing area will request in response to a "size_request" signal. The drawing area may actually be allocated a size larger than this depending on how it is packed within the enclosing containers.