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Reflex-0.097
River stage one • 7 direct dependents • 7 total dependents
13 ++
/ Reflex::Trait::Watched

NAME

Reflex::Trait::Watched - Automatically watch Reflex objects.

VERSION

This document describes version 0.097, released on March 15, 2012.

SYNOPSIS

# Not a complete program. This example comes from Reflex's main # synopsis.

        has clock => (
                isa     => 'Reflex::Interval',
                is      => 'rw',
                traits  => [ 'Reflex::Trait::Watched' ],
                setup   => { interval => 1, auto_repeat => 1 },
        );

DESCRIPTION

Reflex::Trait::Watched modifies a member to automatically watch() any Reflex::Base object stored within it. In the SYNOPSIS, storing a Reflex::Interval in the clock() attribute allows the owner to watch the timer's events.

This trait is a bit of Moose-based syntactic sugar for Reflex::Base's more explict watch() and watch_role() methods.

setup

The "setup" option provides default constructor parameters for the attribute. In the above example, clock() will by default contain

        Reflex::Interval->new(interval => 1, auto_repeat => 1);

In other words, it will emit the Reflex::Interval event ("tick") once per second until destroyed.

role

Attribute events are mapped to the owner's methods using Reflex's role-based callback convention. For example, Reflex will look for an on_clock_tick() method to handle "tick" events from an object with the 'clock" role.

The "role" option allows roles to be set or overridden. A watcher attribute's name is its default role.

Declarative Syntax

Reflex::Trait::Watched exports a declarative watches() function, which acts almost identically to Moose's has() but with a couple convenient defaults: The Watched trait is added, and the attribute is given "rw" access by default.

CAVEATS

The "setup" option is a work-around for unfortunate default timing. It will be deprecated if default can be made to work instead.

SEE ALSO

Please see those modules/websites for more information related to this module.

BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests through the web interface at http://rt.cpan.org/Public/Dist/Display.html?Name=Reflex.

AUTHOR

Rocco Caputo <rcaputo@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Rocco Caputo.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

AVAILABILITY

The latest version of this module is available from the Comprehensive Perl Archive Network (CPAN). Visit http://www.perl.com/CPAN/ to find a CPAN site near you, or see http://search.cpan.org/dist/Reflex/.

The development version lives at http://github.com/rcaputo/reflex and may be cloned from git://github.com/rcaputo/reflex.git. Instead of sending patches, please fork this project using the standard git and github infrastructure.

DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.