I have created my own data type (AngularJS), which I use in my document type - and it works like a charm :)

My custom data type is a week picker which contains both from, to and week number. I use this in a document type, which are displayed as a custom list view. I would like to include this type to the columns, but what I get is a display of all hole json object both from, to and the week number.

So is there a way to put a default value or display value on a custom data type, so it is the week number only that are shown in the custom list view?