main_page.js

/* mainPane and view hierarchy skipped */

      manifestationDetailsView: SC.View.extend({
      
        layout: { centerX: 0, width: 200, top: 20, height: 150},

        contentBinding: 'Bvc.manifestationController',

        render: function (ctx) {
          
          var manif = this.get('content');
          
          // If I do things this way ... everything work fine and I don't need to refresh the view ... but it's not the goal in Sproutcore :)
          //var manif = Bvc.manifestationController.get('content');
          
          if (manif) {
            ctx = ctx.begin('span')
                     .push(manif.get('nom'))
                     .end();
          }
        }

        // This the only way I found to update my view since content is 'undefined' the first time render() is called
        checkController: function () {
          SC.Logger.log('content');
          this.updateLayer();
        }.observes('content')
      })

statechart.js

// This statechart structure should render the pane only when controller's content is ready ... 

Bvc.statechart = SC.Statechart.create({

  initialState: 'readyState',

  readyState = SC.State.extend({
    
    initialSubstate: 'isLoadingState',
  
    enterState: function () {
      var manif = Bvc.store.find(Bvc.Manifestation, 1);
      Bvc.manifestationController.set('content', manif);
      this.didLoadData();
    },
  
    didLoadData: function () {
  
      if (Bvc.manifestationController.get('status') === SC.Record.READY_CLEAN) {
        this.gotoState('showingAppState');
      }
  
    }.stateObserves('Bvc.manifestationController.status'),
  
  
    isLoadingState: SC.State.extend({
  
      enterState: function () {
  
        //TODO: Append a loading panel
        SC.Logger.log('isLoadingState'); 
      }
  
    })
  }),

  showingAppState = SC.State.extend({
  
    enterState: function() {
      Bvc.getPath('mainPage.mainPane').append();
    },
  
    exitState: function() {
      Bvc.getPath('mainPage.mainPane').remove();
    }
  
  })
});