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

Question

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.

Why is this problematic? `ListEditor` and `ListStrEditor` have readonly styles. What have you tried so far? — aestrivex, Jun 30 '15 at 20:12
Why would you want `enabled_when='len(x)>20'` if `len(x)>20` is never true? Are you using this as a way to get a readonly editor? — aestrivex, Jun 30 '15 at 20:14
@aestrivex Thank you for your comments. I had tried several things but not ListEditor. I was using "enabled_when='len(x)>20'" to get a readonly editor. With ListEditor, I am able to get a readonly style AND I am able to scroll through the list. — Antique, Jul 07 '15 at 17:31

score 0 · Answer 1 · answered Aug 12 '15 at 03:36

I think you're looking for a way to customize the editor. Here's the general idea in a minimal example:

from traits.api import HasTraits, List
from traitsui.api import View, ListEditor, Group, Item


class Foo(HasTraits):
    my_list = List()

    def _my_list_default(self):
        return [str(n) for n in range(6)]

    traits_view = View(
        Item('my_list',
            style='custom',
            editor=ListEditor(
                style='text',
                ),
        ),
        height=100,
    )

if __name__ == '__main__':
    f = Foo()
    f.configure_traits()

You can look in the TraitsUI docs to find lots of ways to customize the view with different editor factories. You can change style='readonly' for instance to prevent editing.

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

1 Answers1