Format samples and samples-dev directories.

samples-dev/swarm/swarm_ui_lib/touch/ScrollWatcher.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 touch;
 
 abstract class ScrollListener {
   /**
    * The callback invoked for a scroll event.
    * [decelerating] specifies whether or not the content is moving due
    * to deceleration. It should be false if the content is moving because the
    * user is dragging the content.
    */
   void onScrollerMoved(double scrollX, double scrollY, bool decelerating);
 }
 
 /**
  * The scroll watcher is intended to provide a single way to
  * listen for scroll events from instances of Scroller.
  * TODO(jacobr): this class is obsolete.
  */
 class ScrollWatcher {
   Scroller _scroller;
 
   List<ScrollListener> _listeners;
 
   Element _scrollerEl;
 
   ScrollWatcher(Scroller scroller)
-      : _scroller = scroller, _listeners = new List<ScrollListener>() {
-  }
+      : _scroller = scroller,
+        _listeners = new List<ScrollListener>() {}
 
   void addListener(ScrollListener listener) {
     _listeners.add(listener);
   }
 
   /**
    * Send the scroll event to all listeners.
    * [decelerating] is true if the offset is changing because of deceleration.
    */
-  void _dispatchScroll(num scrollX, num scrollY,
-                       [bool decelerating = false]) {
+  void _dispatchScroll(num scrollX, num scrollY, [bool decelerating = false]) {
     for (final listener in _listeners) {
       listener.onScrollerMoved(scrollX, scrollY, decelerating);
     }
   }
 
   /**
    * Initializes elements and event handlers. Must be called after construction
    * and before usage.
    */
   void initialize() {
     _scrollerEl = _scroller.getElement();
-    _scroller.onContentMoved.listen((e) { _onContentMoved(e); });
+    _scroller.onContentMoved.listen((e) {
+      _onContentMoved(e);
+    });
   }
 
   /**
    * This callback is invoked any time the scroller content offset changes.
    */
   void _onContentMoved(Event e) {
     num scrollX = _scroller.getHorizontalOffset();
     num scrollY = _scroller.getVerticalOffset();
     _dispatchScroll(scrollX, scrollY);
   }
 }