NAME

Notification::Center - An observer/notification for perl

SYNOPSIS

{

    package Counter;

    use Moose;
    use Notification::Center;

    has count => ( is => 'rw', isa => 'Int', default => 0 );

    sub inc {
        my ($self) = @_;
        $self->count( $self->count + 1 );
        my $nc = Notification::Center->default;
        $nc->notify( { event => 'count', args => $self->count } );
    }

    sub dec {
        my ($self) = @_;
        $self->count( $self->count - 1 );
        my $nc = Notification::Center->default;
        $nc->notify( { event => 'count', args => $self->count } );
    }

    no Moose;

    package TrackCount;

    use Moose;

    has count => ( is => 'rw', isa => 'Int', default => 0 );

    sub print {
        my ($self) = @_;
        print $self->count;
    }

    sub get_count {
        my ( $self, $count ) = @_;
        $self->count($count);
    }

    no Moose;
}

my $count = Counter->new;

my $mn = Notification::Center->default;
my $tc = TrackCount->new;
$mn->add(
    {
        observer => $tc,
        event    => 'count',
        method   => 'get_count',
    }
);

for ( 1 .. 10 ) {
    $count->inc;
}
for ( 1 .. 5 ) {
    $count->dec;
}

$tc->print;    # 5


or use IOC using Bread::Board

use Bread::Board;

my $c = container 'TestApp' => as {

    service 'fname' => 'Larry';
    service 'lname' => 'Wall';

    service 'notification_center' => (
        class     => 'Notification::Center',
        lifecycle => 'Singleton',
    );

    service 'person' => (
        class        => 'Person',
        dependencies => {
            notification => depends_on('notification_center'),
            fname        => depends_on('fname'),
            lname        => depends_on('lname'),
        },
    );

    service 'upn' => (
        class        => 'UCPrintName',
        dependencies => { notification => depends_on('notification_center') },
    );

    service 'pn' => (
        class        => 'PrintName',
        dependencies => { notification => depends_on('notification_center'), },
    );
};

my $pn     = $c->fetch('pn')->get;
my $upn    = $c->fetch('upn')->get;
my $person = $c->fetch('person')->get;
my $nc     = $c->fetch('notification_center')->get;

$person->print_name;
$nc->remove( { observer => $upn } );
$person->print_name;

DESCRIPTION

An observer/notification center based on the objective-c NSNotificationCenter Class

new

The method creates a new instance of Notification::Center object

default

This method creates a singleton of the Notification::Center object

add

args keys: observer, event, method

observer: the object that will observer events

event: the name of the event that you are assigning the observer. Defaults to DEFAULT

method: the method you want called on the observer when the event is called. Defaults to update

remove

args keys: observer, event

observer: the object that you want to remove

event: the name of the event that you are removing the observer. Defaults to DEFAULT

notify

args keys : event, args

event: the event you want to trigger

args: data you want to pass into observers

GIT Repository

http://github.com/rlb3/notification-center/tree/master