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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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