[Arp] Pizza example: question about duplicate addEventListeners

[Aral Balkan]

Hi Chris,

The Controller is listening for the event in order to map it to the 
OrderPizzaCommand so it can carry out business logic in response to it 
(in this case, to call a remote method to actually order the pizza.) The 
Application form is listening to it because it needs to perform some 
*presentation*-related logic in response to it (in this case, display 
the preloader clip). In ARP, we call the first event a System Event and 
the second one a View Event, based on whether the Application Controller 
or a form in the View is listening to it (either the form itself or a 
parent form.) Here you can see that an event can be both a View Event 
and a System Event and, in reality, an event is an event is an event. 
The System Event/View Event terminology is just a distinction we make 
when talking about things to clarify our intent.

hth,
Aral

Chris Velevitch wrote:

>In the Pizza example, I see event listeners for the same event
>appearing in 2 locations:-
>
>controller.as: app.orderForm.addEventListener ( "orderPizza", this );
>Application.as: orderForm.addEventListener ( "orderPizza", this );
>
>I'm a newbie to ARP and I just want to understand why?
>  
>