1 // Copyright (c) 2012 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_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_ 6 #define UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_ 7 8 #include <map> 9 #include <vector> 10 11 #include "base/memory/linked_ptr.h" 12 #include "base/memory/scoped_ptr.h" 13 #include "ui/base/events/event_constants.h" 14 #include "ui/base/gestures/gesture_recognizer.h" 15 #include "ui/base/ui_export.h" 16 #include "ui/gfx/point.h" 17 18 namespace ui { 19 class GestureConsumer; 20 class GestureEvent; 21 class GestureEventHelper; 22 class GestureSequence; 23 class TouchEvent; 24 25 class UI_EXPORT GestureRecognizerImpl : public GestureRecognizer { 26 public: 27 typedef std::map<int, GestureConsumer*> TouchIdToConsumerMap; 28 29 explicit GestureRecognizerImpl(GestureEventHelper* helper); 30 virtual ~GestureRecognizerImpl(); 31 32 // Overridden from GestureRecognizer 33 virtual GestureConsumer* GetTouchLockedTarget(TouchEvent* event) OVERRIDE; 34 virtual GestureConsumer* GetTargetForGestureEvent( 35 GestureEvent* event) OVERRIDE; 36 virtual GestureConsumer* GetTargetForLocation( 37 const gfx::Point& location) OVERRIDE; 38 virtual void TransferEventsTo(GestureConsumer* current_consumer, 39 GestureConsumer* new_consumer) OVERRIDE; 40 virtual bool GetLastTouchPointForTarget(GestureConsumer* consumer, 41 gfx::Point* point) OVERRIDE; 42 43 protected: 44 virtual GestureSequence* CreateSequence(GestureEventHelper* helper); 45 virtual GestureSequence* GetGestureSequenceForConsumer(GestureConsumer* c); 46 47 private: 48 // Sets up the target consumer for gestures based on the touch-event. 49 void SetupTargets(const TouchEvent& event, GestureConsumer* consumer); 50 51 // Overridden from GestureRecognizer 52 virtual Gestures* ProcessTouchEventForGesture( 53 const TouchEvent& event, 54 ui::EventResult result, 55 GestureConsumer* target) OVERRIDE; 56 virtual void CleanupStateForConsumer(GestureConsumer* consumer) OVERRIDE; 57 58 std::map<GestureConsumer*, GestureSequence*> consumer_sequence_; 59 60 // Both |touch_id_target_| and |touch_id_target_for_gestures_| map a touch-id 61 // to its target window. touch-ids are removed from |touch_id_target_| on 62 // ET_TOUCH_RELEASE and ET_TOUCH_CANCEL. |touch_id_target_for_gestures_| are 63 // removed in ConsumerDestroyed(). 64 TouchIdToConsumerMap touch_id_target_; 65 TouchIdToConsumerMap touch_id_target_for_gestures_; 66 67 // Touches cancelled by touch capture are routed to the 68 // gesture_consumer_ignorer_. 69 scoped_ptr<GestureConsumer> gesture_consumer_ignorer_; 70 GestureEventHelper* helper_; 71 72 DISALLOW_COPY_AND_ASSIGN(GestureRecognizerImpl); 73 }; 74 75 } // namespace ui 76 77 #endif // UI_BASE_GESTURES_GESTURE_RECOGNIZER_IMPL_H_ 78