Delete AnimationValue

sky/sdk/lib/widgets/animated_component.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:async';
-
-import '../animation/animated_value.dart';
 import '../animation/animation_performance.dart';
 import 'basic.dart';
 
-class _AnimationEntry {
-  _AnimationEntry(this.value);
-  final AnimatedValue value;
-  StreamSubscription<double> subscription;
-}
-
 abstract class AnimatedComponent extends StatefulComponent {
 
   AnimatedComponent({ String key }) : super(key: key);
 
   void syncFields(AnimatedComponent source) { }
 
-  final List<_AnimationEntry> _animatedFields = new List<_AnimationEntry>();
   final List<AnimationPerformance> _watchedPerformances = new List<AnimationPerformance>();
 
-  void watch(AnimatedValue value) {
-    // TODO(ianh): we really should assert that we're not doing this
-    // in the constructor since doing it there is pointless and
-    // expensive, since we'll be doing it for every copy of the object
-    // even though only the first one will use it (since we're
-    // stateful, the others will all be discarded early).
-    assert(!mounted);
-    _animatedFields.add(new _AnimationEntry(value));
-  }
-
   void watchPerformance(AnimationPerformance performance) {
     assert(!_watchedPerformances.contains(performance));
     _watchedPerformances.add(performance);
     if (mounted)
       performance.addListener(scheduleBuild);
   }
 
   void didMount() {
-    for (_AnimationEntry entry in _animatedFields) {
-      entry.subscription = entry.value.onValueChanged.listen((_) {
-        scheduleBuild();
-      });
-    }
-
     for (AnimationPerformance performance in _watchedPerformances)
       performance.addListener(scheduleBuild);
-
     super.didMount();
   }
 
   void didUnmount() {
-    for (_AnimationEntry entry in _animatedFields) {
-      assert(entry.subscription != null);
-      entry.subscription.cancel();
-      entry.subscription = null;
-    }
-
     for (AnimationPerformance performance in _watchedPerformances)
       performance.removeListener(scheduleBuild);
-
     super.didUnmount();
   }
 
 }