[Haskell-cafe] is gldrawingarea an instance of widgetclass

[briand at aracnet.com]

I get this :

    No instance for (Gtk.WidgetClass GtkGL.GLDrawingArea)
      arising from a use of `Gtk.boxPackStart'

in code that was compiling at one point.
This is how I'm importing

  import qualified Graphics.UI.Gtk.OpenGL as GtkGL

then

  glCanvas <- GtkGL.glDrawingAreaNew glconfig

and use it thusly:

  Gtk.boxPackStart hBox1 glCanvas Gtk.PackNatural 0

boxPackStart wants something WidgetClass, and GLDrawingArea seems to be an instance of widget class.

The gtkglext hasn't been touched in quite a while.  I'm wondering if it's become out of date with the latest gtk.

??


Thanks,

Brian