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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ | 5 #ifndef CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ |
6 #define CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ | 6 #define CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ |
7 | 7 |
8 #include "base/memory/scoped_ptr.h" | 8 #include "base/memory/scoped_ptr.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "cc/animation/animation_curve.h" | 10 #include "cc/animation/animation_curve.h" |
11 #include "cc/base/cc_export.h" | 11 #include "cc/base/cc_export.h" |
12 | 12 |
13 namespace cc { | 13 namespace cc { |
14 | 14 |
15 class TimingFunction; | 15 class TimingFunction; |
16 | 16 |
17 class CC_EXPORT ScrollOffsetAnimationCurve : public AnimationCurve { | 17 class CC_EXPORT ScrollOffsetAnimationCurve : public AnimationCurve { |
18 public: | 18 public: |
19 static scoped_ptr<ScrollOffsetAnimationCurve> Create( | 19 static scoped_ptr<ScrollOffsetAnimationCurve> Create( |
20 const gfx::Vector2dF& target_value, | 20 const gfx::Vector2dF& target_value, |
21 scoped_ptr<TimingFunction> timing_function); | 21 scoped_ptr<TimingFunction> timing_function); |
22 | 22 |
23 virtual ~ScrollOffsetAnimationCurve(); | 23 virtual ~ScrollOffsetAnimationCurve(); |
24 | 24 |
25 void SetInitialValue(const gfx::Vector2dF& initial_value); | 25 void SetInitialValue(const gfx::Vector2dF& initial_value); |
26 gfx::Vector2dF GetValue(double t) const; | 26 gfx::Vector2dF GetValue(double t) const; |
| 27 gfx::Vector2dF target_value() const { return target_value_; } |
| 28 void UpdateTarget(double t, const gfx::Vector2dF& new_target); |
27 | 29 |
28 // AnimationCurve implementation | 30 // AnimationCurve implementation |
29 virtual double Duration() const OVERRIDE; | 31 virtual double Duration() const OVERRIDE; |
30 virtual CurveType Type() const OVERRIDE; | 32 virtual CurveType Type() const OVERRIDE; |
31 virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE; | 33 virtual scoped_ptr<AnimationCurve> Clone() const OVERRIDE; |
32 | 34 |
33 private: | 35 private: |
34 ScrollOffsetAnimationCurve(const gfx::Vector2dF& target_value, | 36 ScrollOffsetAnimationCurve(const gfx::Vector2dF& target_value, |
35 scoped_ptr <TimingFunction> timing_function); | 37 scoped_ptr <TimingFunction> timing_function); |
36 | 38 |
37 gfx::Vector2dF initial_value_; | 39 gfx::Vector2dF initial_value_; |
38 gfx::Vector2dF target_value_; | 40 gfx::Vector2dF target_value_; |
39 base::TimeDelta duration_; | 41 base::TimeDelta total_animation_duration_; |
| 42 |
| 43 // Time from animation start to most recent UpdateTarget. |
| 44 base::TimeDelta last_retarget_; |
40 | 45 |
41 scoped_ptr<TimingFunction> timing_function_; | 46 scoped_ptr<TimingFunction> timing_function_; |
42 | 47 |
43 DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationCurve); | 48 DISALLOW_COPY_AND_ASSIGN(ScrollOffsetAnimationCurve); |
44 }; | 49 }; |
45 | 50 |
46 } // namespace cc | 51 } // namespace cc |
47 | 52 |
48 #endif // CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ | 53 #endif // CC_ANIMATION_SCROLL_OFFSET_ANIMATION_CURVE_H_ |
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