My best practice for now is:
mx.core.Application.application.dispatchEvent
using this syntax will always work.
On 4/24/06, Tim Hoff <[EMAIL PROTECTED]> wrote:
I had a similar issue with the ap that I'm working on. When the
user clicks a search button, I dispatch an event that triggers a
command to get data, update the model and change the view. However,
I also needed to calculate summary fields (count, totalAmountDue)
once the data was retrieved. Hmm, to dispatch another event or
not. In this case, I decided just to call the second command
(calculateTotals();) from the onResult function of the first command
(getData();). My thought was that since I was already in the
command abstraction layer (verbs), I could simply just do something
else, without having to go back to the view to dispatch another
event. It seems to me that you want to keep apples with apples and
oranges with oranges. I'd be interested to know if there is a best
practice concerning how to do this in cairngorm.
Tim Hoff
--- In flexcoders@yahoogroups.com, "JesterXL" <[EMAIL PROTECTED]> wrote:
>
> I've been using Cairngorm in Flex 1.5, haven't used C2 in Flex 2
yet, thanks
> for the link!
>
> In that case, yep, have to do what Alex suggested.
>
> As far as maintainable code, you can extend a Cairngorm Event
class (or you
> own), and attach a callback function to it. Your Command classes
can then
> call this function when they are done. This will allow the View
who
> dispatched the command to know when it's done, and immediately
call another
> one, etc.
>
> ----- Original Message -----
> From: "Andrea Varga" <[EMAIL PROTECTED]>
> To: <flexcoders@yahoogroups.com>
> Sent: Sunday, April 23, 2006 1:35 PM
> Subject: Re: [flexcoders] Caurngorm 2 - where to deal with system
events?
>
>
> I have read that using EventBroadcaster is deprecated in
Cairngorm 2,
> instead the built in dispatchEvent() should be used:
> http://weblogs.macromedia.com/swebster/archives/2006/02/index.cfm
>
> OT - My messages appear with several hours delay on the list. Does
> anyone know why?
>
> Andi
>
> JesterXL wrote:
>
> >You don't need that if you are using Cairngorm's
EventBroadcaster; it has
> >nothing to do with DisplayObjects. Simply do what Alex suggested
in the
> >result of your Command, do:
> >
> >EventBroadcaster.getInstance().broadcastEvent ( Event.YOUR_EVENT,
{param:
> >value});
> >
> >----- Original Message -----
> >From: "Alex Uhlmann" <[EMAIL PROTECTED]>
> >To: <flexcoders@yahoogroups.com>
> >Sent: Sunday, April 23, 2006 12:03 PM
> >Subject: RE: [flexcoders] Caurngorm 2 - where to deal with system
events?
> >
> >
> >Hi Andi,
> >
> >You can certainly call another Command in the onResult of your
> >LoginCommand. But since a Command class in not on the display
list,
> >events wouldn't make it to Cairngorm's FrontController. You have
to use
> >mx.core.Application.application.dispatchEvent. Darron Schall has
a nice
> >explanation of it here:
> > http://www.darronschall.com/weblog/archives/000224.cfm
> >
> >Best,
> >Alex
> >
> >Alex Uhlmann
> >Consultant (Rich Internet Applications)
> >Adobe Consulting
> >Westpoint, 4 Redheughs Rigg, South Gyle, Edinburgh, EH12 9DQ, UK
> >p: +44 (0) 131 338 6969
> >m: +44 (0) 7917 428 951
> >[EMAIL PROTECTED]
> >
> >
> >-----Original Message-----
> >From: flexcoders@yahoogroups.com
[mailto:flexcoders@yahoogroups.com] On
> >Behalf Of Andrea Varga
> >Sent: 23 April 2006 11:15
> >To: flexcoders@yahoogroups.com
> >Subject: [flexcoders] Caurngorm 2 - where to deal with system
events?
> >
> >Hi All!
> >
> >I have to mention that I'm new to Cairngorm and Flex.
> >What is best practice to deal with system events (or whatever the
events
> >that are not dispatched by a user gesture are called)?
> >For example: after a successful user login I have to display a
list of
> >products (list loded from the server).
> >So, I have a login form in a component: Login.mxml, where I have a
> >dispatch for the LoginEvent => the LoginCommand takes care of
it...
> >(goes to server etc.), the onResult method in the LoginCommand is
> >called. If the login was successful, I set the
> >ModelLocator.applicationState to the new state, the view is
binded to
> >that, so now I have the correct view (with a datagrid for
example), and
> >now I need the list of the products.
> >But for that, I need the list of the products = the
> >ProductListGetCommand must be executed which means, that somebody
has to
> >dispatch an event for that, but there is no user gesture here.
> >Where should I place the code for dispathing the event?
> >Or, is my whole logic correct?
> >
> >My only idea here is to place it in LoginCommand.onResult?
> >
> >I have tried that:
> >var tmpEvent:ProductListGetEvent = new ProductListGetEvent();
> >dispatchEvent( tmpEvent ); I got the error: Call to a possibly
undefined
> >method 'dispatchEvent'
> >
> >That's why I think this might not be the right place.
> >
> >
> >I'm using Cairngorm 2.0 Flex 2.0 and AMFPHP , but I think this is
not
> >reallt relevant here.
> >
> >Thanks
> >Andi
> >
> >
> >
> >
> >--
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