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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ | 5 #ifndef WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ |
6 #define WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ | 6 #define WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ |
7 | 7 |
8 #include "third_party/WebKit/public/platform/WebFloatPoint.h" | 8 #include "third_party/WebKit/public/platform/WebFloatPoint.h" |
9 #include "third_party/WebKit/public/platform/WebFloatSize.h" | 9 #include "third_party/WebKit/public/platform/WebFloatSize.h" |
10 #include "third_party/WebKit/public/platform/WebGestureCurve.h" | 10 #include "third_party/WebKit/public/platform/WebGestureCurve.h" |
11 #include "third_party/WebKit/public/platform/WebSize.h" | 11 #include "third_party/WebKit/public/platform/WebSize.h" |
12 #include "webkit/child/webkit_child_export.h" | 12 #include "webkit/child/webkit_child_export.h" |
13 | 13 |
14 namespace WebKit { | 14 namespace blink { |
15 class WebGestureCurveTarget; | 15 class WebGestureCurveTarget; |
16 } | 16 } |
17 | 17 |
18 namespace webkit_glue { | 18 namespace webkit_glue { |
19 | 19 |
20 // Implementation of WebGestureCurve suitable for touch pad/screen-based | 20 // Implementation of WebGestureCurve suitable for touch pad/screen-based |
21 // fling scroll. Starts with a flat velocity profile based on 'velocity', which | 21 // fling scroll. Starts with a flat velocity profile based on 'velocity', which |
22 // tails off to zero. Time is scaled to that duration of the fling is | 22 // tails off to zero. Time is scaled to that duration of the fling is |
23 // proportional to the initial velocity. | 23 // proportional to the initial velocity. |
24 class TouchFlingGestureCurve : public WebKit::WebGestureCurve { | 24 class TouchFlingGestureCurve : public blink::WebGestureCurve { |
25 public: | 25 public: |
26 | 26 |
27 WEBKIT_CHILD_EXPORT static WebGestureCurve* Create( | 27 WEBKIT_CHILD_EXPORT static WebGestureCurve* Create( |
28 const WebKit::WebFloatPoint& initial_velocity, | 28 const blink::WebFloatPoint& initial_velocity, |
29 float p0, float p1, float p2, | 29 float p0, float p1, float p2, |
30 const WebKit::WebSize& cumulativeScroll); | 30 const blink::WebSize& cumulativeScroll); |
31 | 31 |
32 virtual bool apply(double monotonicTime, | 32 virtual bool apply(double monotonicTime, |
33 WebKit::WebGestureCurveTarget*) OVERRIDE; | 33 blink::WebGestureCurveTarget*) OVERRIDE; |
34 | 34 |
35 private: | 35 private: |
36 TouchFlingGestureCurve(const WebKit::WebFloatPoint& initial_velocity, | 36 TouchFlingGestureCurve(const blink::WebFloatPoint& initial_velocity, |
37 float p0, | 37 float p0, |
38 float p1, | 38 float p1, |
39 float p2, | 39 float p2, |
40 const WebKit::WebSize& cumulativeScroll); | 40 const blink::WebSize& cumulativeScroll); |
41 virtual ~TouchFlingGestureCurve(); | 41 virtual ~TouchFlingGestureCurve(); |
42 | 42 |
43 WebKit::WebFloatPoint displacement_ratio_; | 43 blink::WebFloatPoint displacement_ratio_; |
44 WebKit::WebFloatSize cumulative_scroll_; | 44 blink::WebFloatSize cumulative_scroll_; |
45 float coefficients_[3]; | 45 float coefficients_[3]; |
46 float time_offset_; | 46 float time_offset_; |
47 float curve_duration_; | 47 float curve_duration_; |
48 float position_offset_; | 48 float position_offset_; |
49 | 49 |
50 DISALLOW_COPY_AND_ASSIGN(TouchFlingGestureCurve); | 50 DISALLOW_COPY_AND_ASSIGN(TouchFlingGestureCurve); |
51 }; | 51 }; |
52 | 52 |
53 } // namespace webkit_glue | 53 } // namespace webkit_glue |
54 | 54 |
55 #endif // WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ | 55 #endif // WEBKIT_CHILD_TOUCH_FLING_GESTURE_CURVE_H_ |
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