NAME

       HTML::Widget::Constraint::Callback - Callback Constraint

SYNOPSIS

           my $c = $widget->constraint( 'Callback', 'foo' )->callback(sub {
               my $value=shift;
               return 1;
           });

DESCRIPTION

       A callback constraint which will only be run once for each submitted value of each named
       field.

METHODS

   callback
   cb
       Arguments: \&callback

       Define the callback to be used for validation.

       "cb" is an alias for "callback".

   validate
       perform the actual validation.

AUTHOR

       Sebastian Riedel, "sri@oook.de"

       Marcus Ramberg, "mramberg@cpan.org"

LICENSE

       This library is free software, you can redistribute it and/or modify it under the same
       terms as Perl itself.