Is it possible to make a validator that can compare the values of two form
components at the same time? I have an Upload component for uploading files
directly and a TextField component for uploading files from a URL. The user
is supposed to fill in only one of the fields. I would like to have a
validator that checks if both fields are empty, or if both are full, but I
don't know how to pass both fields' values to the validator.
Is this kind of validation better done in the form's submit listener? If so,
is there a way to use client-side validation as well (to create dialogs as
shown in the TimeTracker example)? Is this where a validation delegate would
be used?
Thanks!
Peter Beshai
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