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_UI_GESTURE_PROVIDER_H_ 6 #define UI_EVENTS_GESTURE_DETECTION_UI_GESTURE_PROVIDER_H_ 7 8 #include "base/basictypes.h" 9 #include "ui/events/event.h" 10 #include "ui/events/events_export.h" 11 #include "ui/events/gesture_detection/filtered_gesture_provider.h" 12 #include "ui/events/gesture_detection/gesture_event_data_packet.h" 13 #include "ui/events/gesture_detection/touch_disposition_gesture_filter.h" 14 #include "ui/events/gestures/motion_event_aura.h" 15 16 namespace ui { 17 18 class EVENTS_EXPORT GestureProviderAuraClient { 19 public: 20 virtual ~GestureProviderAuraClient() {} 21 virtual void OnGestureEvent(GestureEvent* event) = 0; 22 }; 23 24 // Provides gesture detection and dispatch given a sequence of touch events 25 // and touch event acks. 26 class EVENTS_EXPORT GestureProviderAura : public GestureProviderClient { 27 public: 28 GestureProviderAura(GestureProviderAuraClient* client); 29 virtual ~GestureProviderAura(); 30 31 bool OnTouchEvent(const TouchEvent& event); 32 void OnTouchEventAck(bool event_consumed); 33 const MotionEventAura& pointer_state() { return pointer_state_; } 34 ScopedVector<GestureEvent>* GetAndResetPendingGestures(); 35 36 // GestureProviderClient implementation 37 virtual void OnGestureEvent(const GestureEventData& gesture) OVERRIDE; 38 39 private: 40 bool IsConsideredDoubleTap(const GestureEventData& previous_tap, 41 const GestureEventData& current_tap) const; 42 43 scoped_ptr<GestureEventData> previous_tap_; 44 45 GestureProviderAuraClient* client_; 46 MotionEventAura pointer_state_; 47 FilteredGestureProvider filtered_gesture_provider_; 48 49 int last_touch_event_flags_; 50 ui::LatencyInfo last_touch_event_latency_info_; 51 bool handling_event_; 52 ScopedVector<GestureEvent> pending_gestures_; 53 54 DISALLOW_COPY_AND_ASSIGN(GestureProviderAura); 55 }; 56 57 } // namespace ui 58 59 #endif // UI_EVENTS_GESTURE_DETECTION_UI_GESTURE_PROVIDER_H_ 60
