import vegas.events.ModelObjectEvent ;
     import vegas.models.arrays.PageableArrayModelObject ;
     import vegas.vo.SimpleValueObject ;
     
     import system.events.ArrayEvent ;
     
     var init:Function = function( e:Event ):void
     {
         trace( "init" ) ;
     }
     
     var update:Function = function( e:Event ):void
     {
         switch( true )
         {
             case e is ArrayEvent :
             {
                 trace( e + " : " + (e as ArrayEvent).array ) ;
                 break ;
             }
             case e is ModelObjectEvent :
             {
                 trace( e + " : " + (e as ModelObjectEvent).getVO() ) ;
                 break ;
             }
             default :
             {
                 trace( e + " : unknow type of event.") ;
             }
         }
     }
     
     var model:PageableArrayModelObject = new PageableArrayModelObject() ;
     
     model.count =  2 ;
     
     model.addEventListener( Event.INIT                 , init   ) ;
     model.addEventListener( ModelObjectEvent.UPDATE_VO , update ) ;
     
     var datas:Array  = [] ;
     var count:uint = 20 ;
     for ( var i:uint = 0 ; i<count ; i++ )
     {
         datas.push( new SimpleValueObject( { id:i } ) ) ;
     }
     
     model.init( datas ) ;
     
     var onKeyDown:Function = function( e:KeyboardEvent ):void
     {
         var code:uint = e.keyCode ;
         switch( code )
         {
             case Keyboard.LEFT :
             {
                 if ( model.hasPrevious() == false )
                 {
                     model.lastPage() ;
                 }
                 else
                 {
                     model.previous() ;
                 }
                 break ;
            }
            case Keyboard.RIGHT :
            {
                if ( model.hasNext() == false )
                {
                    model.firstPage() ;
                }
                else
                {
                    model.next() ;
                }
                break ;
            }
            case Keyboard.SPACE :
            {
                model.setCount( 4 , true ) ; // change the count value but not auto restart the update process of the model.
            }
         }
     }
     
     stage.addEventListener( KeyboardEvent.KEY_DOWN , onKeyDown ) ;
     
     trace( "Press Keyboard.LEFT and Keyboard.RIGHT keys to test this model" ) ;
     trace( "Press Keyboard.SPACE to use a page with 4 items inside (change count of items)." ) ;
     
     model.currentPage = 2 ; // go to the page 2