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// Copyright 2014 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.
#ifndef UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
#define UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
#include <set>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "ui/compositor/compositor_animation_observer.h"
#include "ui/compositor/compositor_export.h"
namespace ui {
class Compositor;
class LayerAnimator;
// A collection of LayerAnimators that should be updated at each animation step
// in the compositor.
class COMPOSITOR_EXPORT LayerAnimatorCollection
: public CompositorAnimationObserver {
public:
explicit LayerAnimatorCollection(Compositor* compositor);
~LayerAnimatorCollection() override;
void StartAnimator(scoped_refptr<LayerAnimator> animator);
void StopAnimator(scoped_refptr<LayerAnimator> animator);
bool HasActiveAnimators() const;
base::TimeTicks last_tick_time() const { return last_tick_time_; }
// CompositorAnimationObserver:
void OnAnimationStep(base::TimeTicks timestamp) override;
private:
Compositor* compositor_;
base::TimeTicks last_tick_time_;
std::set<scoped_refptr<LayerAnimator> > animators_;
DISALLOW_COPY_AND_ASSIGN(LayerAnimatorCollection);
};
} // namespace ui
#endif // UI_COMPOSITOR_LAYER_ANIMATOR_COLLECTION_H_
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