Class View
source code
object --+
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interfaces.IView --+
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View
A Multiton IView implementation.
In PureMVC, the View class assumes these
responsibilities:
Maintain a cache of IMediator instances.
Provide methods for registering, retrieving, and removing
IMediators.
Notifiying IMediators when they are registered or
removed.
Managing the observer lists for each INotification in the
application.
Providing a method for attaching IObservers to an
INotification's observer list.
Providing a method for broadcasting an INotification.
Notifying the IObservers of a given
INotification when it broadcast.
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registerObserver(self,
notificationName,
observer)
Register an IObserver to be notified of
INotifications with a given name. |
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removeObserver(self,
notificationName,
notifyContext)
Remove the observer for a given notifyContext from an observer list
for a given Notification name. |
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Inherited from object:
__delattr__,
__format__,
__getattribute__,
__hash__,
__new__,
__reduce__,
__reduce_ex__,
__repr__,
__setattr__,
__sizeof__,
__str__,
__subclasshook__
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instanceMap = {}
Multiton error message
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MULTITON_MSG = 'View multiton instance for this key is already... |
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mediatorMap
Mapping of Notification names to Observer lists
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observerMap
The Multiton Key for this Core
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Inherited from object:
__class__
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Constructor.
This IView implementation is a Multiton, so you should
not call the constructor directly, but instead call the static Multiton
Factory method View.getInstance( multitonKey )
- Raises:
MultitonError - if instance for this Multiton key has already been constructed - Overrides:
object.__init__
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Initialize the Singleton View instance.
Called automatically by the constructor, this is your opportunity to
initialize the Singleton instance in your subclass without overriding the
constructor.
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View Singleton Factory method.
- Returns:
- the Singleton instance of
View
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registerObserver(self,
notificationName,
observer)
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Register an IObserver to be notified of
INotifications with a given name.
- Parameters:
notificationName - the name of the INotifications to notify this
IObserver ofobserver - the IObserver to register - Overrides:
interfaces.IView.registerObserver
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Notify the IObservers for a particular
INotification.
All previously attached IObservers for this
INotification's list are notified and are passed a reference
to the INotification in the order in which they were
registered.
- Parameters:
notification - the INotification to notify IObservers
of. - Overrides:
interfaces.IView.notifyObservers
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removeObserver(self,
notificationName,
notifyContext)
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Remove the observer for a given notifyContext from an observer list
for a given Notification name.
- Parameters:
notificationName - which observer list to remove fromnotifyContext - remove the observer with this object as its notifyContext - Overrides:
interfaces.IView.removeObserver
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Register an IMediator instance with the
View.
Registers the IMediator so that it can be retrieved by
name, and further interrogates the IMediator for its
INotification interests.
If the IMediator returns any INotification
names to be notified about, an Observer is created
encapsulating the IMediator instance's
handleNotification method and registering it as an
Observer for all INotifications the
IMediator is interested in.
- Parameters:
mediator - a reference to the IMediator instance - Overrides:
interfaces.IView.registerMediator
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Retrieve an IMediator from the View.
- Parameters:
mediatorName - the name of the IMediator instance to retrieve. - Returns:
- the
IMediator instance previously registered with
the given mediatorName.
- Overrides:
interfaces.IView.retrieveMediator
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Remove an IMediator from the View.
- Parameters:
mediatorName - name of the IMediator instance to be removed. - Returns:
- the
IMediator that was removed from the
View
- Overrides:
interfaces.IView.removeMediator
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Check if a Mediator is registered or not
- Parameters:
mediatorName - the name of the IMediator - Returns:
- whether a Mediator is registered with the given
mediatorName.
- Overrides:
interfaces.IView.hasMediator
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Remove an IView instance
- Parameters:
key - of IView instance to remove
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MULTITON_MSG
- Value:
'View multiton instance for this key is already constructed!'
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