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. 4 5 #ifndef UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_ 6 #define UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_ 7 8 #include "base/containers/stack_container.h" 9 #include "ui/events/gesture_detection/gesture_detection_export.h" 10 #include "ui/events/gesture_detection/gesture_event_data.h" 11 12 namespace ui { 13 14 class MotionEvent; 15 16 // Acts as a transport container for gestures created (directly or indirectly) 17 // by a touch event. 18 class GESTURE_DETECTION_EXPORT GestureEventDataPacket { 19 public: 20 enum GestureSource { 21 UNDEFINED = -1, // Used only for a default-constructed packet. 22 INVALID, // The source of the gesture was invalid. 23 TOUCH_SEQUENCE_START, // The start of a new gesture sequence. 24 TOUCH_SEQUENCE_END, // The end of a gesture sequence. 25 TOUCH_SEQUENCE_CANCEL, // The gesture sequence was cancelled. 26 TOUCH_START, // A touch down occured during a gesture sequence. 27 TOUCH_MOVE, // A touch move occured during a gesture sequence. 28 TOUCH_END, // A touch up occured during a gesture sequence. 29 TOUCH_TIMEOUT, // Timeout from an existing gesture sequence. 30 }; 31 32 GestureEventDataPacket(); 33 GestureEventDataPacket(const GestureEventDataPacket& other); 34 ~GestureEventDataPacket(); 35 GestureEventDataPacket& operator=(const GestureEventDataPacket& other); 36 37 // Factory methods for creating a packet from a particular event. 38 static GestureEventDataPacket FromTouch(const ui::MotionEvent& touch); 39 static GestureEventDataPacket FromTouchTimeout( 40 const GestureEventData& gesture); 41 42 void Push(const GestureEventData& gesture); 43 timestamp()44 const base::TimeTicks& timestamp() const { return timestamp_; } gesture(size_t i)45 const GestureEventData& gesture(size_t i) const { return gestures_[i]; } gesture_count()46 size_t gesture_count() const { return gestures_->size(); } gesture_source()47 GestureSource gesture_source() const { return gesture_source_; } touch_location()48 const gfx::PointF& touch_location() const { return touch_location_; } raw_touch_location()49 const gfx::PointF& raw_touch_location() const { return raw_touch_location_; } 50 51 private: 52 GestureEventDataPacket(base::TimeTicks timestamp, 53 GestureSource source, 54 const gfx::PointF& touch_location, 55 const gfx::PointF& raw_touch_location); 56 57 enum { kTypicalMaxGesturesPerTouch = 5 }; 58 base::TimeTicks timestamp_; 59 base::StackVector<GestureEventData, kTypicalMaxGesturesPerTouch> gestures_; 60 gfx::PointF touch_location_; 61 gfx::PointF raw_touch_location_; 62 GestureSource gesture_source_; 63 }; 64 65 } // namespace ui 66 67 #endif // UI_EVENTS_GESTURE_DETECTION_GESTURE_EVENT_DATA_PACKET_H_ 68