1 /* 2 * Copyright (c) 2010, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef ScrollAnimatorWin_h 32 #define ScrollAnimatorWin_h 33 34 #if ENABLE(SMOOTH_SCROLLING) 35 36 #include "ScrollAnimator.h" 37 #include "Timer.h" 38 39 namespace WebCore { 40 41 class ScrollAnimatorWin : public ScrollAnimator { 42 public: 43 ScrollAnimatorWin(ScrollableArea*); 44 virtual ~ScrollAnimatorWin(); 45 46 virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier); 47 virtual void scrollToOffsetWithoutAnimation(const FloatPoint&); 48 49 private: 50 struct PerAxisData { 51 PerAxisData(ScrollAnimatorWin* parent, float* currentPos); 52 53 float* m_currentPos; 54 float m_desiredPos; 55 float m_currentVelocity; 56 float m_desiredVelocity; 57 double m_lastAnimationTime; 58 Timer<ScrollAnimatorWin> m_animationTimer; 59 }; 60 61 static double accelerationTime(); 62 static const double animationTimerDelay; 63 64 void animationTimerFired(Timer<ScrollAnimatorWin>*); 65 void stopAnimationTimerIfNeeded(PerAxisData*); 66 void animateScroll(PerAxisData*); 67 68 PerAxisData m_horizontalData; 69 PerAxisData m_verticalData; 70 }; 71 72 } // namespace WebCore 73 74 #endif // ENABLE(SMOOTH_SCROLLING) 75 76 #endif // ScrollAnimatorWin_h 77
