1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
6 #define UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
10 #include "base/callback.h"
11 #include "base/memory/ref_counted.h"
12 #include "base/time/time.h"
13 #include "ui/compositor/compositor_animation_observer.h"
14 #include "ui/compositor/compositor_export.h"
21 // A collection of LayerAnimators that should be updated at each animation step
23 class COMPOSITOR_EXPORT LayerAnimatorCollection
24 : public CompositorAnimationObserver {
26 explicit LayerAnimatorCollection(Compositor* compositor);
27 ~LayerAnimatorCollection() override;
29 void StartAnimator(scoped_refptr<LayerAnimator> animator);
30 void StopAnimator(scoped_refptr<LayerAnimator> animator);
32 bool HasActiveAnimators() const;
34 base::TimeTicks last_tick_time() const { return last_tick_time_; }
36 // CompositorAnimationObserver:
37 void OnAnimationStep(base::TimeTicks timestamp) override;
40 Compositor* compositor_;
41 base::TimeTicks last_tick_time_;
42 std::set<scoped_refptr<LayerAnimator> > animators_;
44 DISALLOW_COPY_AND_ASSIGN(LayerAnimatorCollection);
49 #endif // UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_