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// 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_
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