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// Copyright 2012 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 CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_
#define CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_
#include "cc/cc_export.h"
#include "cc/scrollbar_animation_controller.h"
namespace cc {
class CC_EXPORT ScrollbarAnimationControllerLinearFade : public ScrollbarAnimationController {
public:
static scoped_ptr<ScrollbarAnimationControllerLinearFade> create(LayerImpl* scrollLayer, double fadeoutDelay, double fadeoutLength);
virtual ~ScrollbarAnimationControllerLinearFade();
virtual bool animate(double monotonicTime) OVERRIDE;
virtual void didPinchGestureUpdateAtTime(double monotonicTime) OVERRIDE;
virtual void didPinchGestureEndAtTime(double monotonicTime) OVERRIDE;
virtual void updateScrollOffsetAtTime(LayerImpl* scrollLayer, double monotonicTime) OVERRIDE;
protected:
ScrollbarAnimationControllerLinearFade(LayerImpl* scrollLayer, double fadeoutDelay, double fadeoutLength);
private:
float opacityAtTime(double monotonicTime);
double m_lastAwakenTime;
bool m_pinchGestureInEffect;
double m_fadeoutDelay;
double m_fadeoutLength;
};
} // namespace cc
#endif // CC_SCROLLBAR_ANIMATION_CONTROLLER_LINEAR_FADE_H_
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