Manage widget geometry in PyGTK
Several container widgets exist in GTK+, and with the toolkit’s API, you
can create user-defined containers. This API is also exposed to PyGTK. In this
article, learn how to create a "weighted-table" container in PyGTK. The
implementation introduces you to the basic model of GTK+ geometry management and
gives you a feel for what to consider and expect when implementing container
widgets.