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, "[email protected]"

Marcus Ramberg, "[email protected]"

LICENSE

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