1 /* 2 * Copyright (C) 2011 Apple 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef PlatformGestureEvent_h 27 #define PlatformGestureEvent_h 28 29 #include "platform/PlatformEvent.h" 30 #include "platform/geometry/FloatPoint.h" 31 #include "platform/geometry/IntPoint.h" 32 #include "platform/geometry/IntSize.h" 33 #include "wtf/Assertions.h" 34 #include <string.h> 35 36 namespace WebCore { 37 38 class PlatformGestureEvent : public PlatformEvent { 39 public: PlatformGestureEvent()40 PlatformGestureEvent() 41 : PlatformEvent(PlatformEvent::GestureScrollBegin) 42 { 43 memset(&m_data, 0, sizeof(m_data)); 44 } 45 PlatformGestureEvent(Type type,const IntPoint & position,const IntPoint & globalPosition,const IntSize & area,double timestamp,bool shiftKey,bool ctrlKey,bool altKey,bool metaKey,float deltaX,float deltaY,float velocityX,float velocityY)46 PlatformGestureEvent(Type type, const IntPoint& position, const IntPoint& globalPosition, const IntSize& area, double timestamp, bool shiftKey, bool ctrlKey, bool altKey, bool metaKey, float deltaX, float deltaY, float velocityX, float velocityY) 47 : PlatformEvent(type, shiftKey, ctrlKey, altKey, metaKey, timestamp) 48 , m_position(position) 49 , m_globalPosition(globalPosition) 50 , m_area(area) 51 { 52 ASSERT(type == PlatformEvent::GestureScrollBegin 53 || type == PlatformEvent::GestureScrollEnd 54 || type == PlatformEvent::GestureScrollUpdate 55 || type == PlatformEvent::GestureScrollUpdateWithoutPropagation); 56 memset(&m_data, 0, sizeof(m_data)); 57 m_data.m_scrollUpdate.m_deltaX = deltaX; 58 m_data.m_scrollUpdate.m_deltaY = deltaY; 59 m_data.m_scrollUpdate.m_velocityX = velocityX; 60 m_data.m_scrollUpdate.m_velocityY = velocityY; 61 } 62 position()63 const IntPoint& position() const { return m_position; } // PlatformWindow coordinates. globalPosition()64 const IntPoint& globalPosition() const { return m_globalPosition; } // Screen coordinates. 65 area()66 const IntSize& area() const { return m_area; } 67 deltaX()68 float deltaX() const 69 { 70 ASSERT(m_type == PlatformEvent::GestureScrollUpdate 71 || m_type == PlatformEvent::GestureScrollUpdateWithoutPropagation); 72 return m_data.m_scrollUpdate.m_deltaX; 73 } 74 deltaY()75 float deltaY() const 76 { 77 ASSERT(m_type == PlatformEvent::GestureScrollUpdate 78 || m_type == PlatformEvent::GestureScrollUpdateWithoutPropagation); 79 return m_data.m_scrollUpdate.m_deltaY; 80 } 81 tapCount()82 int tapCount() const 83 { 84 ASSERT(m_type == PlatformEvent::GestureTap); 85 return m_data.m_tap.m_tapCount; 86 } 87 velocityX()88 float velocityX() const 89 { 90 ASSERT(m_type == PlatformEvent::GestureScrollUpdate 91 || m_type == PlatformEvent::GestureScrollUpdateWithoutPropagation); 92 return m_data.m_scrollUpdate.m_velocityX; 93 } 94 velocityY()95 float velocityY() const 96 { 97 ASSERT(m_type == PlatformEvent::GestureScrollUpdate 98 || m_type == PlatformEvent::GestureScrollUpdateWithoutPropagation); 99 return m_data.m_scrollUpdate.m_velocityY; 100 } 101 scale()102 float scale() const 103 { 104 ASSERT(m_type == PlatformEvent::GesturePinchUpdate); 105 return m_data.m_pinchUpdate.m_scale; 106 } 107 108 protected: 109 IntPoint m_position; 110 IntPoint m_globalPosition; 111 IntSize m_area; 112 113 union { 114 struct { 115 int m_tapCount; 116 } m_tap; 117 118 struct { 119 float m_deltaX; 120 float m_deltaY; 121 float m_velocityX; 122 float m_velocityY; 123 } m_scrollUpdate; 124 125 struct { 126 float m_scale; 127 } m_pinchUpdate; 128 } m_data; 129 }; 130 131 } // namespace WebCore 132 133 #endif // PlatformGestureEvent_h 134