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package HTML::Widget::Constraint::Callback;
use warnings;
use strict;
use base 'HTML::Widget::Constraint';
__PACKAGE__->mk_accessors(qw/callback/);
*cb = \&callback;
HideShow 34 lines of Pod
=head1 NAME
HTML::Widget::Constraint::Callback - Callback Constraint
=head1 SYNOPSIS
    my $c = $widget->constraint( 'Callback', 'foo' )->callback(sub { 
        my $value=shift;
        return 1;
    });
=head1 DESCRIPTION
A callback constraint which will only be run once for each submitted value 
of each named field.
=head1 METHODS
=head2 callback
=head2 cb
Arguments: \&callback
Define the callback to be used for validation.
L</cb> is an alias for L</callback>.
=head2 validate
perform the actual validation.
=cut
sub validate {
    my ( $self, $value ) = @_;
    my $callback = $self->callback || sub {1};
    return $callback->($value);
}
HideShow 13 lines of Pod
=head1 AUTHOR
Sebastian Riedel, C<sri@oook.de>
Marcus Ramberg, C<mramberg@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;