[Arp] Another ModelLocator Question

[Rich Rodecker]

i try not to use systemcontroller for model events, just for events
that will fire off commands that will interct with the server.  What i
do is make the Model (I just use a simple class with EventDispatching
capabilities added to it, and listen for update events from the Model.

nothing particularly wrong with using SystemController like that
though, I do it occasionaly when i need a quick fix.



On 12/20/06, COLIN LIGHT <colin.light at btopenworld.com> wrote:
> Hi Nyls,
>
> I've just been looking at Grants arpx classes. Can you tell me do you use
> his CommandControl class? from what I can make out brings in commands from
> the 'command-config.xml'
>
> Col.
>
>
> COLIN LIGHT <colin.light at btopenworld.com> wrote:
>
> Hi Nyls,
>
> Thanks again for getting back to me.
>
> Yeah this does make sense. I've been getting a little muddled up cos I
> downloaded Grants arpx (which doesn't seem to contain a ModelLocator) and
> christophes version which seems slightly different with a modelLocator with
> binding etc.
>
> Col.
>
>
> nyls <info at nyls.nl> wrote:
>
>
> Hey,
>
> The modellocator (ML) is a singleton so there is only one instance of it in
> your app. This is your single entry point to your data/ models from
> everywhere in your app.
>
> I tend to use the ARPX –systemcontroller from Grant , So I let views listen
> to the systemcontroller for 'update' events.
>
> So when a command get's it's result it fills a model through the ML and
> dispatches an systemEvent
>
> ModelLocator.getInstance().setModel(ModelNames.NAVIGATION_MODEL,OCLiteVO(response.ocliteVO));
> SystemController.getInstance().dispatchEvent({type:EventNames.NAVIGATION_MODEL_CHANGE})
>
> And in the appropriate views I listen for thos system events and grab the
> model from the modellocator
>
> SystemController.getInstance().addEventListener(EventNames.NAVIGATION_MODEL_CHANGE,
> Proxy.create(this, navigationModelChanged));
> var navModel =
> ModelLocator.getInstance().getModel(ModelNames.NAVIGATION_MODEL).getValue();
>
> That's how I do it,
>
> Is this of help ??
>
> nyls
>
>
>
>  ________________________________
>
> Van: arp-bounces at ariaware.com [mailto:arp-bounces at ariaware.com] Namens COLIN
> LIGHT
> Verzonden: Wednesday, December 20, 2006 2:37 PM
> Aan: arp at ariaware.com
> Onderwerp: [Arp] Another ModelLocator Question
>
> Hi List,
>
>
>
> I'm (as ever) hoping someone can help me out with an ARP issue. I've been
> using arp for a few months now and just when I think I'm get it something
> else comes along and I question my own understanding :(
>
>
>
> I've been looking at the ModelLocator pattern, I have read previous post's
> about this and found some sample files although it does seem a little
> confusing. I downloaded the arpx classes
> http://www.herrodius.com/upload/arp_extensions.zip which
> contain quite a comprehensive version with databinding etc, I've also seen
> and much simpler single class version which I have been trying to use.
>
>
>
> I have a number of ArpForms which compose my views. Within these forms are
> other Arpforms which effectively are like components.
>
>
>
> What I'm struggling with is how to populate mx components in my component
> forms, is it good practice to import my modelLocator class and then have an
> update method which gets called from the main application class when the
> model gets populate or create a listener on each form for update events from
> the modelLocator?
>
>
>
> Col._______________________________________________
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