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