Writing a Widget Using Cairo and GNU Smalltalk

Cairo is a powerful 2-dimensional graphics library designed to support a number of modern graphics techniques
including stroking, alpha blending and anti-aliasing. It supports multiple output formats, which allows
developers to use the same code to display graphics on the screen, print them to the printer or accelerate
them with OpenGL.

Here is a screenshot of a cairo clock :

imagik.fr

Look at the source code in the GtkLauncher repository ;)