| // 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_ |