How can I make a View Item readonly AND scrollable in Enthought Traitsui?

I am using the views in Enthought Traitsui. Within a view, I am using Item('strings', enabled_when='len(x)>20'), where 'strings' is a list of strings and len(x)>20 is never true. If there are more than three strings in the list, I cannot see them all. I would like to be able to scroll through all the strings but at the same time not be allowed to edit the strings. Does anybody know if I can have a readonly AND scrollable item, and if not what are the alternatives? Thank you.