[cairo] how to interface with an NSWindow

[Travis Griggs]

I'm working on my VisualWorks Smalltalk interface to Cairo. In that  
environment, I have easy access to any NSWindow I open, and the  
ability to send objective-c messages. So what I do is basically:

1) fetch the class named NSGraphicsContext
2) id nsGC = [NSGraphicsContext graphicsContextWithWindow: myNSWindow];
3) cgCtx = [nsGC graphicPort];
4) cairo_nquartz_surface_create_for_cg_context (cgCtx, 200, 200, 1);

But when I do drawing ops on that surface, nothing happens. :( Am I  
doing this right at all? Or is there a better/different way to do it?  
Do I need to send additional messages to the NSGraphicsContext or to  
the CGGraphicsContext (this is just a struct pointer,right?)?

I'm using 1.2.6 (I think). I'm confused about the recent sent of  
messages regarding osx apis and stability thereof. Should I upgrade  
to the new snapshots for cairo?

TIA

--
Travis Griggs
Objologist
My Other Machine runs OSX. But then... so does this one.


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