Openerp 7.0

Is there a method on ORM model which is called everytime an object is opened in a particular view? I've tried fields_view_get, view_init (which does not seem to work at all), try to find it inside read method with not luck. I've even tried inheriting object_proxy to look for it in execute_cr method, but again - no luck!

So is it not possible to know when an object is opened in a Form or in Tree view?