/* * Copyright (C) 2012 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef TouchpadFlingPlatformGestureCurve_h #define TouchpadFlingPlatformGestureCurve_h #include "FloatPoint.h" #include "PlatformGestureCurve.h" #include <wtf/OwnPtr.h> #include <wtf/PassOwnPtr.h> namespace WebCore { class PlatformGestureCurveTarget; // Implementation of PlatformGestureCurve suitable for touch pad/screen-based // fling scroll. Starts with a flat velocity profile based on 'velocity', which // tails off to zero. Time is scaled to that duration of the fling is proportional // the initial velocity. class TouchpadFlingPlatformGestureCurve : public PlatformGestureCurve { public: static PassOwnPtr<PlatformGestureCurve> create(const FloatPoint& velocity, IntPoint cumulativeScroll = IntPoint()); static PassOwnPtr<PlatformGestureCurve> create(const FloatPoint& velocity, float p0, float p1, float p2, float p3, float p4, float curveDuration, IntPoint cumulativeScroll = IntPoint()); virtual ~TouchpadFlingPlatformGestureCurve(); virtual const char* debugName() const { return "TouchpadFling"; } virtual bool apply(double monotonicTime, PlatformGestureCurveTarget*); private: TouchpadFlingPlatformGestureCurve(const FloatPoint& velocity, float p0, float p1, float p2, float p3, float p4, float curveDuration, const IntPoint& cumulativeScroll); FloatPoint m_displacementRatio; IntPoint m_cumulativeScroll; float m_coeffs[5]; float m_timeOffset; float m_curveDuration; float m_positionOffset; static const int m_maxSearchIterations; }; } // namespace WebCore #endif