Gtk controls over GStreamer video
 

Hello.
I want to put some gtk controls over GStreamer video (like standard video player controls play/pause). Video stream is displayed in GtkDrawingArea.
I tried to put the drawing area and a button in GtkFixed container but button wasn't shown. It was hidden by video stream even if the button above drawing area in Z-order.
Maybe I need handling some events to repaint button?