gistfile1.txt

Rapid.isBusyController = SC.ArrayController.create({
  isBusy: NO,
  manageBusyState: function(item){
    this.set('isBusy', YES);
    if (item  && (status = item.get('status'))){
        while ((status = item.get('status')) & SC.Record.BUSY){
          SC.RunLoop.begin(); //<---no affect
          SC.RunLoop.end(); //<--- i guess the jobs in here affect teh status
        }
      }
    this.set('isBusy', NO);
  }
});
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  progressView: Rapid.ProgressView.design({
    layout: {centerX:0, centerY:0, height:150, width:150, border:0},
    isBusyBinding: SC.Binding.from('Rapid.isBusyController.isBusy'),
    isVisible: function(){
      var isBusy = this.get('isBusy');
      if(isBusy) console.log('i should be shown');
      this.updateLayerIfNeeded();
      return this.get('isBusy');
    }.property('isBusy')
  
  })