understanding undo and the general lack of comments in code ...

["Sameer Sahasrabuddhe" <sameerds gmail com>]

Hello,

I was trying to figure out how to us Undo, and started with this article:

http://live.gnome.org/Dia/Undo

I wanted to follow up on how struct ReorderObjectsChange and the
related functions are used. But the problem is can't really make out
what is happening in code such as
diagram_place_under_selected() in app/diagram.c

Any pointers in this respect is highly appreciated!

Sameer.
-- 
Research Scholar, KReSIT, IIT Bombay
http://www.it.iitb.ac.in/~sameerds/