I have added gobject non-blocking i/o and started to wrap widget methods into class. If you as main author like it - then you can continue such refactoring. If not - it is possible to rewrite it without class though it adds ugly global variables (the main reason I decided to implement extra class for callback processing).

Also config file now is being read during.startup only.

Attached are diff file against version 0.0.2(sorry that not against latest one) and complete widget file.