1 // Copyright 2012 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 CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_ 6 #define CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_ 7 8 #include "base/time/time.h" 9 #include "cc/base/cc_export.h" 10 #include "ui/gfx/vector2d_f.h" 11 12 namespace cc { 13 14 // This abstract class represents the compositor-side analogy of 15 // ScrollbarAnimator. Individual platforms should subclass it to provide 16 // specialized implementation. 17 class CC_EXPORT ScrollbarAnimationController { 18 public: 19 virtual ~ScrollbarAnimationController() {} 20 21 virtual bool IsScrollGestureInProgress() const = 0; 22 virtual bool IsAnimating() const = 0; 23 virtual base::TimeDelta DelayBeforeStart(base::TimeTicks now) const = 0; 24 25 virtual bool Animate(base::TimeTicks now) = 0; 26 virtual void DidScrollGestureBegin() = 0; 27 virtual void DidScrollGestureEnd(base::TimeTicks now) = 0; 28 virtual void DidProgrammaticallyUpdateScroll(base::TimeTicks now) = 0; 29 }; 30 31 } // namespace cc 32 33 #endif // CC_ANIMATION_SCROLLBAR_ANIMATION_CONTROLLER_H_ 34
