Example showing alternate async measurement solution

client/samples/swarm/Views.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
 // This file contains View framework classes.
 // As it grows, it may need to be split into multiple files.
 
 /** A factory that creates a view from a data model. */
 interface ViewFactory<D> {
   View newView(D item);
 
@@ skipping 269 matching lines @@
     if (height != null) {
       style.height = '${height}px';
     }
     // TODO(jacobr): this should be specified by the default CSS for a
     // GenericListView.
     style.overflow = 'hidden';
   }
 
 
   void onResize() {
-    int lastViewLength = _viewLength;
-    node.rect.then((ElementRect rect) {
-      _viewLength = _vertical ? rect.offset.height : rect.offset.width;
+    window.requestMeasurementFrame(() {
+      int lastViewLength = _viewLength;
+      final offset = node.rect.offset;
+      _viewLength = _vertical ? offset.height : offset.width;
       if (_viewLength != lastViewLength) {
-        if (_scrollbar != null) {
-          _scrollbar.refresh();
-        }
-        renderVisibleItems(true);
+        return () {
+          if (_scrollbar != null) {
+            _scrollbar.refresh();
+          }
+          renderVisibleItems(true);
+        };
       }
     }); 
   }
 
   void enterDocument() {
     if (scroller != null) {
-      onResize();
-
       if (_scrollbar != null) {
         _scrollbar.initialize();
       }
+      onResize();
     }
   }
 
   int getNextIndex(int index, bool forward) {
     int delta = forward ? 1 : -1;
     if (_paginate) {
       int newPage = Math.max(0, _layout.getPage(index, _viewLength) + delta);
       index = _layout.getPageStartIndex(newPage, _viewLength);
     } else {
       index += delta;
@@ skipping 656 matching lines @@
 
     container = node.query('.dialog-body');
     container.nodes.add(_content.node);
 
     return node;
   }
 
   /** Override to handle dialog done. */
   void onDone() { }
 }