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. 4 5#ifndef UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_ 6#define UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_ 7 8#include <set> 9 10#include "base/callback.h" 11#include "base/memory/ref_counted.h" 12#include "base/time/time.h" 13#include "ui/compositor/compositor_export.h" 14 15namespace base { 16class TimeTicks; 17} 18 19namespace ui { 20 21class LayerAnimator; 22 23class COMPOSITOR_EXPORT LayerAnimatorCollectionDelegate { 24 public: 25 virtual ~LayerAnimatorCollectionDelegate() {} 26 27 virtual void ScheduleAnimationForLayerCollection() = 0; 28}; 29 30// A collection of LayerAnimators that should be updated at each animation step 31// in the compositor. 32class COMPOSITOR_EXPORT LayerAnimatorCollection { 33 public: 34 explicit LayerAnimatorCollection(LayerAnimatorCollectionDelegate* delegate); 35 ~LayerAnimatorCollection(); 36 37 void StartAnimator(scoped_refptr<LayerAnimator> animator); 38 void StopAnimator(scoped_refptr<LayerAnimator> animator); 39 40 bool HasActiveAnimators() const; 41 42 void Progress(base::TimeTicks now); 43 44 base::TimeTicks last_tick_time() const { return last_tick_time_; } 45 46 private: 47 LayerAnimatorCollectionDelegate* delegate_; 48 base::TimeTicks last_tick_time_; 49 std::set<scoped_refptr<LayerAnimator> > animators_; 50 51 DISALLOW_COPY_AND_ASSIGN(LayerAnimatorCollection); 52}; 53 54} // namespace ui 55 56#endif // UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_ 57