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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_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
#define CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "ui/gfx/vector2d_f.h"
namespace cc {
// This abstract class represents the compositor-side analogy of
// ScrollbarAnimator. Individual platforms should subclass it to provide
// specialized implementation.
class CC_EXPORT ScrollbarAnimationController {
public:
virtual ~ScrollbarAnimationController() {}
virtual bool IsScrollGestureInProgress() const = 0;
virtual bool IsAnimating() const = 0;
virtual base::TimeDelta DelayBeforeStart(base::TimeTicks now) const = 0;
virtual bool Animate(base::TimeTicks now) = 0;
virtual void DidScrollGestureBegin() = 0;
virtual void DidScrollGestureEnd(base::TimeTicks now) = 0;
virtual void DidProgrammaticallyUpdateScroll(base::TimeTicks now) = 0;
};
} // namespace cc
#endif // CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_
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