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Rose::HTML::Form::Field::Time::Split::HourMinuteSecond
Compound field for times with separate text fields for hour, minute, and second, and a pop-up menu for selecting AM or PM.

Rose::HTML::Form::Field::Time::Split::HourMinuteSecond - Compound field for times with separate text fields for hour, minute, and second, and a pop-up menu for selecting AM or PM.


NAME

Rose::HTML::Form::Field::Time::Split::HourMinuteSecond - Compound field for times with separate text fields for hour, minute, and second, and a pop-up menu for selecting AM or PM.


SYNOPSIS


    $field =

      Rose::HTML::Form::Field::Time::Split::HourMinuteSecond->new(

        label   => 'Time',

        name    => 'time',  

        default => '8am');

    print $field->field('hour')->internal_value; # "08"

    $field->input_value('13:00:00 PM');

    # "AM/PM only valid with hours less than 12"

    $field->validate or warn $field->error;

    $field->input_value('blah');

    # "Invalid time"

    $field->validate or warn $field->error;

    $field->input_value('6:30 a.m.');

    print $field->internal_value; # "06:30:00 AM"

    print $field->html;

    ...


DESCRIPTION

the Rose::HTML::Form::Field::Time::Split::HourMinuteSecond manpage is a compound field for times with separate text fields for hour, minute, and second, and a pop-up menu for selecting AM or PM.

This class inherits (indirectly) from both the Rose::HTML::Form::Field::Time manpage and the Rose::HTML::Form::Field::Compound manpage. This doesn't quite work out as expected without a bit of tweaking. We'd like inflate_value() and validate() methods to be inherited from the Rose::HTML::Form::Field::Time manpage, but everything else to be inherited from the Rose::HTML::Form::Field::Compound manpage.

To solve this problem, there's an intermediate class that imports the correct set of methods. This class then inherits from the intermediate class. To solve this problem, there's an intermediate class that imports the correct set of methods. This class then inherits from the intermediate class. This works, and isolates the tricky bits to a single intermediate class, but it also demonstrates the problems that can crop up when multiple inheritance is combined with a strong aversion to code duplication.

A simpler example of a compound field can be found in the Rose::HTML::Form::Field::PhoneNumber::US::Split manpage. It too uses multiple inheritance, but its family tree is more conveniently built, saving it from selective method importing shenanigans.

This field also overrides the is_full()|Rose::HTML::Form::Field::Compound/is_full method. A valid time can be extracted from the field as long as both the hour and AM/PM subfields are not empty. All other empty fields will be treated as if they contained zeros (00).

It is important that this class (indirectly) inherits from the Rose::HTML::Form::Field::Compound manpage. See the the Rose::HTML::Form::Field::Compound manpage documentation for more information.


AUTHOR

John C. Siracusa (siracusa@gmail.com)


COPYRIGHT

Copyright (c) 2007 by John C. Siracusa. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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