1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_
6 #define CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_
10 #include "base/synchronization/lock.h"
11 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
12 #include "third_party/WebKit/public/platform/WebSize.h"
15 class WebGestureCurve;
20 // A class to manage dynamically adjustable parameters controlling the
21 // shape of the fling deacceleration function.
22 class FlingCurveConfiguration {
24 FlingCurveConfiguration();
25 virtual ~FlingCurveConfiguration();
27 // Create a touchpad fling curve using the current parameters.
28 blink::WebGestureCurve* CreateForTouchPad(
29 const blink::WebFloatPoint& velocity,
30 const blink::WebSize& cumulativeScroll);
32 // Create a touchscreen fling curve using the current parameters.
33 blink::WebGestureCurve* CreateForTouchScreen(
34 const blink::WebFloatPoint& velocity,
35 const blink::WebSize& cumulativeScroll);
37 // Set the curve parameters.
38 void SetCurveParameters(
39 const std::vector<float>& new_touchpad,
40 const std::vector<float>& new_touchscreen);
43 blink::WebGestureCurve* CreateCore(
44 const std::vector<float>& coefs,
45 const blink::WebFloatPoint& velocity,
46 const blink::WebSize& cumulativeScroll);
48 // Protect access to touchpad_coefs_ and touchscreen_coefs_.
50 std::vector<float> touchpad_coefs_;
51 std::vector<float> touchscreen_coefs_;
53 DISALLOW_COPY_AND_ASSIGN(FlingCurveConfiguration);
56 } // namespace content
58 #endif // CONTENT_CHILD_FLING_CURVE_CONFIGURATION_H_