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package HTML::Widget::Constraint::DependOn;
use warnings;
use strict;
use base 'HTML::Widget::Constraint';
=head1 NAME
HTML::Widget::Constraint::DependOn - DependOn Constraint
=head1 SYNOPSIS
my $c = $widget->constraint( 'DependOn', 'foo', 'bar' );
=head1 DESCRIPTION
If the first field listed is filled in, all of the others are required.
=head1 METHODS
=head2 process
=cut
sub process {
my ( $self, $w, $params ) = @_;
my $results = [];
my @names = @{ $self->names };
my $first = shift @names;
return [] if !exists $params->{$first};
for my $name (@names) {
push @$results,
HTML::Widget::Error->new(
{ name => $name, message => $self->mk_message } )
if $self->not ? $params->{$name} : !$params->{$name};
}
return $results;
}
=head1 AUTHOR
Carl Franks, C<cfranks@cpan.org>
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
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