| // Copyright 2013 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_SCROLL_OFFSET_ANIMATION_CURVE_H_ |
| #define CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "base/time/time.h" |
| #include "cc/animation/animation_curve.h" |
| #include "cc/base/cc_export.h" |
| #include "ui/gfx/geometry/scroll_offset.h" |
| |
| namespace cc { |
| |
| class TimingFunction; |
| |
| class CC_EXPORT ScrollOffsetAnimationCurve : public AnimationCurve { |
| public: |
| static scoped_ptr<ScrollOffsetAnimationCurve> Create( |
| const gfx::ScrollOffset& target_value, |
| scoped_ptr<TimingFunction> timing_function); |
| |
| ~ScrollOffsetAnimationCurve() override; |
| |
| void SetInitialValue(const gfx::ScrollOffset& initial_value); |
| gfx::ScrollOffset GetValue(base::TimeDelta t) const; |
| gfx::ScrollOffset target_value() const { return target_value_; } |
| void UpdateTarget(double t, const gfx::ScrollOffset& new_target); |
| |
| // AnimationCurve implementation |
| base::TimeDelta Duration() const override; |
| CurveType Type() const override; |
| scoped_ptr<AnimationCurve> Clone() const override; |
| |
| private: |
| ScrollOffsetAnimationCurve(const gfx::ScrollOffset& target_value, |
| scoped_ptr <TimingFunction> timing_function); |
| |
| gfx::ScrollOffset initial_value_; |
| gfx::ScrollOffset target_value_; |
| base::TimeDelta total_animation_duration_; |
| |
| // Time from animation start to most recent UpdateTarget. |
| base::TimeDelta last_retarget_; |
| |
| scoped_ptr<TimingFunction> timing_function_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationCurve); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ |