Where is a good tutorial how to write custo, django widgets?

Question

I'm trying to modify the adimn interface. I need a custom type of textbox that does some pre/post processing on the text. If I understand correctly, a custom widget is the way to go about this.

Where is a good tutorial how to write custom widgets for Django?

Answer 1

I found this: http://www.kryogenix.org/days/2008/03/28/overriding-a-single-field-in-the-django-admin-using-newforms-admin

Answer 2

Found this reference for the admin site: http://www.slideshare.net/lincolnloop/customizing-the-django-admin