On Sat, Dec 08, 2007 at 08:33:36PM +0000, Andrew Coppin wrote:
I just spent the evening writing a library that's a thin layer over Gtk2hs. It took an age to get it to compile, but eventually it worked. Yay!
When I ran it, I got this:
Test2: gtk/Graphics/UI/Gtk/Gdk/PixbufData.hs.pp:58:0: No instance nor default method for class operation Data.Array.Base.getNumElements
Er... wow.
OK, at this point, I am completely stumped. Any hints?
That's pretty obviously a bug - Graphics.UI.Gtk.Gdk.PixbufData doesn't fully implement the (M)Array class.
(Also, the documentation for Graphics.UI.Gtk.Misc.DrawingArea suggests that you may want to draw a Pixbuf using the pixbufRenderToDrawable function - but GHC complains that this function doesn't exist. I had to use drawPixbuf instead. Wow that has a lot of parameters... In particular, the final two don't seem to be documented. Interesting. They're both 0 in the "fastdraw" demo.)
Stefan