gdk_window_invalidate_rectangle()

Hello,

I've been trying to make a simple vector drawing program using 
clg+cairo.  The problem I'm having at the moment is that drawing with 
cairo doesn't invalidate the window, making the expose event only call 
its handler once.  Drawing outside of the expose event is rather 
disastrous in a paint program of course.

GDK has a function to manually invalidate a region, the problem is that 
I can't find this function anywhere in the gdk wrapper.  Is there an 
alternative, not yet implemented?

Thanks!


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