| // Copyright 2014 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 CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_ |
| #define CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_ |
| |
| #include <vector> |
| |
| #include "base/synchronization/lock.h" |
| #include "third_party/WebKit/public/platform/WebFloatPoint.h" |
| #include "third_party/WebKit/public/platform/WebSize.h" |
| |
| namespace blink { |
| class WebGestureCurve; |
| } |
| |
| namespace content { |
| |
| // A class to manage dynamically adjustable parameters controlling the |
| // shape of the fling deacceleration function. |
| class FlingCurveConfiguration { |
| public: |
| FlingCurveConfiguration(); |
| virtual ~FlingCurveConfiguration(); |
| |
| // Create a touchpad fling curve using the current parameters. |
| blink::WebGestureCurve* CreateForTouchPad( |
| const blink::WebFloatPoint& velocity, |
| const blink::WebSize& cumulativeScroll); |
| |
| // Create a touchscreen fling curve using the current parameters. |
| blink::WebGestureCurve* CreateForTouchScreen( |
| const blink::WebFloatPoint& velocity, |
| const blink::WebSize& cumulativeScroll); |
| |
| // Set the curve parameters. |
| void SetCurveParameters( |
| const std::vector<float>& new_touchpad, |
| const std::vector<float>& new_touchscreen); |
| |
| private: |
| blink::WebGestureCurve* CreateCore( |
| const std::vector<float>& coefs, |
| const blink::WebFloatPoint& velocity, |
| const blink::WebSize& cumulativeScroll); |
| |
| // Protect access to touchpad_coefs_ and touchscreen_coefs_. |
| base::Lock lock_; |
| std::vector<float> touchpad_coefs_; |
| std::vector<float> touchscreen_coefs_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FlingCurveConfiguration); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_ |