[Catalyst] HTML::Widget troubles; $result methods return empty

[Randall Hansen]

Advice on IRC was to dump Plugin::Fillinform in favor of HTML::Widget.
I'm trying to use it, but so far I've not been able to get any $result
methods to return anything.

Here's my code.  It's a minimal example, but from reading the docs it
seems like it should work:

    $c->widget->element( 'Textfield', 'firstname' );
    $c->widget->constraint( 'All', 'firstname' );
    my $result = $c->widget->process;

After this, any method I call on $result (e.g. $result->params)
returns undef or an empty data structure.  I know that 'firstname' is
coming in as a parameter because $c->req->param( 'firstname' ) returns
it.

Sebastian's example contains:
>     my $result = $c->widget('foo')->process($query);

But none of the docs indicate where $query should come from.  I've
tried $c->req, but that doesn't work.

I also tried:

    my $result = $c->widget_result;

On IRC Sebastian suggested that I use "indicator," but I have no idea
what that does.  The docs don't help, and there's no mention of it in
the list archives.

In short, I'm a little lost.  I'm willing to admit that I'm doing
something wrong, I just don't know what.  Any help appreciated.

Randall