     import spark.components.ButtonBar;
     import spark.components.Group;
     import spark.components.ViewNavigator;
+    import spark.effects.IViewTransition;
+    import spark.effects.SlideViewTransition;
     
     public class ViewNavigatorSkin extends SliderSkin
     {

        //
        //--------------------------------------------------------------------------
        public var hostComponent:ViewNavigator;
        public var contentGroup:Group;
        public var actionBar:ActionBar;
        public var tabBar:ButtonBar;
        
        //--------------------------------------------------------------------------
        //

            addChild(tabBar);
            
            tabBar.dataProvider = hostComponent;
            
            defaultPushTransition = new SlideViewTransition(300, SlideViewTransition.SLIDE_LEFT);
            defaultPopTransition = new SlideViewTransition(300, SlideViewTransition.SLIDE_RIGHT);
        }
        
        /**
