Combine window.setTimeout/setInterval with Timer and Timer.repeating. Also

samples/swarm/swarm_ui_lib/view/SliderMenu.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of view;
 
 typedef void SelectHandler(String menuText);
 
 /**
  * This implements a horizontal menu bar with a sliding triangle arrow
@@ skipping 139 matching lines @@
       selectItem(result, animate);
     }
   }
 
   /**
    * animate - if true, then animate the movement of the triangle slider
    */
   void updateIndicator(bool animate) {
     if (selectedItem != null) {
       // calculate where we want to put the triangle
-      window.setImmediate(() {
+      window.immediate.then((_) {
         num x = selectedItem.offsetLeft +
             selectedItem.offsetWidth / 2 - TRIANGLE_WIDTH / 2;
         _moveIndicator(x, animate);
       });
     } else {
       _moveIndicator(0, animate);
     }
   }
 
   void _moveIndicator(num x, bool animate) {
     // find the slider filler (the div element to the left of the
     // triangle) set its width the push the triangle to where we want it.
     String duration = animate ? '.3s' : '0s';
     final triangle = node.query('.sm-triangle');
     triangle.style.transitionDuration = duration;
     FxUtil.setWebkitTransform(triangle, x, 0);
   }
 }