cairo sample application

[writser <writser xs4all nl>]

hey all,

To demonstrate how to use gtkmm with cairo (and to find it out myself) I 
wrote a small demo. 'Cairoclock' displays a scalable clock and allows 
you to export it to a PNG image. You can download it here: 
http://www.xs4all.nl/~writser/cairoclock/. No hyperadvanced algorithms, 
but the code is heavily commented so perhaps it's useful for some new 
developers. If you have any suggestions be my guest! :)

By the way: a small remark about the function Gdk::Window::get_geometry( 
.. ). Documentation says about this function: "Any of the return 
location arguments to this function may be 0, if you aren't interested 
in getting the value of that field.". But isn't that impossible, since 
this function uses references? Perhaps the function could be overloaded, 
so we are allowed to write stuff like: get_geometry(0, 0, width, 0, 0);.

And finally, there are no demos about how to use cairo in gtkmm. Perhaps 
we could add one? Or do you guys want to wait for cairomm?

regards, Writser