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My main view does not result in mediator methods being called

• Edit

rob

26 Aug, 2010 09:08 AM

Hi,

I am using Robotlegs for the first time, I think I have the concepts nailed down, but it would appear I can't get much working ;-)

First, I have a main view, that's an MXML file for Flex 4. I've added the declaration for the context and confirmed that the context is being initialised successfully.

Within the context I have an entry to map the view class to a mediator class.

The mediator does not get invoked, I have checked that it has an [Inject] annotation for the main view.

I feel that this is something to do with the MXML file existing prior to the context being initialised, is this correct?

I would post the code, but that's on a different machine that I don't have access to, but I'm hoping to learn something new here for the train journey home.

On a slightly different note, I have seen examples that refer to 'Sprite', when do I need to know / worry about that - is it an alternative to Flex?

Once I have this correct, I plan to either blog or create a screencast to help others - the ones I have followed jump around a lot, or are too basic to get to grips with.

Cheers,
Rob.

1. Support Staff 1 Posted by Shaun Smith on 26 Aug, 2010 11:17 AM

   

   Hi Rob,

   1. Are you setting the contextView in your MXML context declaration? It should look something like this:

      <fx:Declarations>

      <ns:SomeContext contextView="{this}"/>

      </fx:Declarations>

   2. Does your context's startup() method run? Your context might look something like this:

   public class SomeContext extends Context
   {
       override public function startup():void
       {
           trace("SomeContext::startup() executed");
           
           // Map some events to Commands
           commandMap.mapEvent(ContextEvent.STARTUP, StartupCommand, ContextEvent, true);
           
           // Map some models and services
           injector.mapSingleton(SomeModel);
           injector.mapSingletonOf(ISomeService, SomeService);
           
           // Map some views
           mediatorMap.mapView(SomeView, SomeViewMediator);
           
           // Map main view (contextView) last
           // see: http://github.com/robotlegs/robotlegs-framework/blob/v1.1.2/src/org/robotlegs/base/MediatorMap.as#L117
           mediatorMap.mapView(MainView, MainViewMediator);
           
           dispatchEvent(new ContextEvent(ContextEvent.STARTUP));
       }
   }
   

   1. Is your mediator being created? Your mediator might look like this:

   public class SomeMediator extends Mediator
   {
       [Inject]
       public var view:SomeView;
       
       override public function onRegister():void
       {
           trace("SomeMediator::onRegister() executed");
           trace("View is " + view);
       }
   }
   

   Hope that helps!

   • Edit

2. 2 Posted by rob on 26 Aug, 2010 12:32 PM

   

   Hi Shaun,

   Thanks for a quick reply.

   Yes, my MXML file (the main application view that's created by Flex)

   <?xml version="1.0" encoding="utf-8"?>
   <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
    xmlns:s="library://ns.adobe.com/flex/spark" 
    xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
    xmlns:services="com.x.*" width="100%" pageTitle="Tester" height="100%" 
    xmlns:views="com.x.views.*" >
    .
    .
   <fx:Declarations>
   <views:GlobalContext id="globalContext" contextView="{this}" />

   I have stepped through the debugger within the context file, so yes, this has been invoked correctly, the view is mapped to the mediator last...

               // Map main view (contextView) last
           // see: http://github.com/robotlegs/robotlegs-framework/blob/v1.1.2/src/org/robotlegs/base/MediatorMap.as#L117
           mediatorMap.mapView(LoginView, LoginViewMediator);

   And the mediator looks like this...

   Oh.. .wait...

   I just notice that I registered the LoginView with the LoginViewMediator whereas I read that as MainView with my MainViewMediator, which of course wouldn't run because I never registered it!
   

   I'm starting to think that I might be dyslexic!! Problem solved! Thanks.

   Thanks again!
   Rob.

   package com.x.views
   {
       import org.robotlegs.mvcs.Mediator;
   
       public class HawkEyeViewMediator extends Mediator
       {
           [Inject] // This is the view that this mediator is responsible for
           public var mainView : MainView;
   
           public function MainViewMediator()
           {
               super();
           }
   
           public override function onRegister():void {
               mainView.doSomething();
           }
       }
   }

   • Edit

3. Support Staff 3 Posted by Shaun Smith on 26 Aug, 2010 12:36 PM

   

   Hehe, glad you're back on track =)

   • Edit

4. Shaun Smith closed this discussion on 26 Aug, 2010 12:36 PM.