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

samples/swarm/swarm_ui_lib/view/ConveyorView.dart

Index: samples/swarm/swarm_ui_lib/view/ConveyorView.dart
diff --git a/samples/swarm/swarm_ui_lib/view/ConveyorView.dart b/samples/swarm/swarm_ui_lib/view/ConveyorView.dart
index 696c1bd4d74c3ad3c843f3c33b93e31e9bbedcad..87c0710af71221fba597e13611af7e1ce532a88f 100644
--- a/samples/swarm/swarm_ui_lib/view/ConveyorView.dart
+++ b/samples/swarm/swarm_ui_lib/view/ConveyorView.dart
@@ -23,11 +23,11 @@ class ConveyorView extends CompositeView {
   // which view is selected? (e.g. the MVVM pattern)
   Function viewSelected;
 
-  int animationTimeoutId;
+  Timer animationTimer;
 
   ConveyorView()
   : super('conveyor-view', true),
-    animationTimeoutId = null {
+    animationTimer = null {
   }
 
   Element render() {
@@ -61,13 +61,10 @@ class ConveyorView extends CompositeView {
     final xTranslationPercent = -index * 100;
     style.transform = 'translate3d(${xTranslationPercent}%, 0px, 0px)';
 
-    if (animationTimeoutId != null) {
-      window.clearTimeout(animationTimeoutId);
-    }
-
     if (animate) {
-      animationTimeoutId = window.setTimeout(
-          () { _onAnimationEnd(); }, (durationSeconds * 1000).toInt());
+      animationTimer = new Timer(
+          new Duration(milliseconds: ((durationSeconds * 1000).toInt())),

[blois, 2013/02/13 03:09:24]

Not an issue for your CL, but this seems like it defeats the whole purpose of
the named params for Duration.

The code looks like it could take doubles for params, and I'm also curious why
Duration is limited to millisecond precision.

[floitsch, 2013/02/13 10:03:07]

We are looking to see if we can add microseconds. The main reason is, that some
time-constants then don't fit into JS' 53 bits anymore.

Also remove the empty closure for _onAnimationEnd.

[Emily Fortuna, 2013/02/13 20:19:44]

Done.

+          () { _onAnimationEnd(); });
     }
     // TODO(mattsh), we should set the visibility to hide everything but the
     // selected view.