First thing is to create a new module adding our kanban views to to-do tasks. In a real-world work, situation using a module for this would probably be excessive and they could perfectly well be added directly in the todo_ui module. But for a clearer explanation, we will use a new module and avoid too many, and possibly confusing, changes in already created files. We will name it todo_kanban and create the usual initial files as follows:

$ cd ~/odoo-dev/custom-addons
$ mkdir todo_kanban
$ touch todo_kanban/__init__.py

Now, edit the descriptor file todo_kanban/__openerp__.py as follows:

{'name': 'To-Do Kanban',
 'description': 'Kanban board for to-do tasks.',
 'author': 'Daniel Reis',
 'depends': ['todo_ui'],
 'data': ['todo_view.xml'] }

Next, create the XML file where our shiny new kanban views will go and set kanban as the default view on the to-do task's window action, as shown in the following:

<?xml version="1.0"?>
<openerp>
  <data>	
    <!-- Add...