NotificationCenter Class Reference

Collaboration diagram for NotificationCenter:

Static Public Member Functions
static	addObserver ($observer, $method, $event, $object=NULL)
static	removeObserver ($observer, $event=NULL, $object=NULL)
static	postNotification ($event, $object, $user_data=null)
static	on ($event, Callable $callback, $object=null)
static	off ($event, Callable $callback, $object=null)

Detailed Description

The NotificationCenter class is the central event dispatcher for Stud.IP. Objects interested in receiving notifications for particular events need to register with the NotificationCenter:

NotificationCenter::addObserver($this, 'update', 'shutdown');

Event notifications are sent via the postNotification() method:

NotificationCenter::postNotification('shutdown', $sender);

Member Function Documentation

addObserver()

static addObserver (   $observer,   $method,   $event,   $object = NULL  )

static

Register an object to be notified. The same object may be registered several times (e.g. for different notifications). The event name may contain shell-style wildcards (like '*').

Parameters

object	$observer	object to be notified
string	$method	method that will be called
string	$event	name of event (may be NULL)
mixed	$object	subject to observe (may be NULL)

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off()

static off (   $event, Callable  $callback,   $object = null  )

static

Convenience method that uses a jQuery like structure for event unregistration by closures.

Parameters

string	$event
Callable	$callback
mixed	$object

Since

Stud.IP 4.2

on()

static on (   $event, Callable  $callback,   $object = null  )

static

Convenience method that uses a jQuery like structure for event registration by closures.

Parameters

string	$event
Callable	$callback
mixed	$object

Since

Stud.IP 4.2

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postNotification()

static postNotification (   $event,   $object,   $user_data = null  )

static

Post an event notification to all registered observers. Only observers registered for this event type and subject are notified.

Parameters

string	$event	name of this notification
mixed	$object	subject of this notification
mixed	$user_data	additional information (optional)

Exceptions

NotificationVetoException

on observer veto

removeObserver()

static removeObserver (   $observer,   $event = NULL,   $object = NULL  )

static

Remove an object registered with the NotificationCenter. Trying to remove an observer that was not registered is allowed and has no effect.

Parameters

object	$observer	object to be removed
string	$event	name of event (may be NULL)
mixed	$object	subject to observe (may be NULL)

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The documentation for this class was generated from the following file:

• lib/classes/NotificationCenter.class.php