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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef VIEWS_TOUCHUI_GESTURE_MANAGER_H_ | 5 #ifndef VIEWS_TOUCHUI_GESTURE_MANAGER_H_ |
| 6 #define VIEWS_TOUCHUI_GESTURE_MANAGER_H_ | 6 #define VIEWS_TOUCHUI_GESTURE_MANAGER_H_ |
| 7 #pragma once | 7 #pragma once |
| 8 | 8 |
| 9 #include "base/memory/singleton.h" | 9 #include "base/memory/singleton.h" |
| 10 #include "views/view.h" | 10 #include "views/view.h" |
| 11 | 11 |
| 12 namespace ui { | 12 namespace ui { |
| 13 enum TouchStatus; | 13 enum TouchStatus; |
| 14 } | 14 } |
| 15 | 15 |
| 16 namespace views { | 16 namespace views { |
| 17 class TouchEvent; | 17 class TouchEvent; |
| 18 | 18 |
| 19 // A GestureManager singleton detects gestures occurring in the | 19 // A GestureManager singleton detects gestures occurring in the |
| 20 // incoming feed of touch events across all of the RootViews in | 20 // incoming feed of touch events across all of the RootViews in |
| 21 // the system. In response to a given touch event, the GestureManager | 21 // the system. In response to a given touch event, the GestureManager |
| 22 // updates its internal state and optionally dispatches synthetic | 22 // updates its internal state and optionally dispatches synthetic |
| 23 // events to the invoking view. | 23 // events to the invoking view. |
| 24 // | 24 // |
| 25 class VIEWS_API GestureManager { | 25 class VIEWS_EXPORT GestureManager { |
| 26 public: | 26 public: |
| 27 virtual ~GestureManager(); | 27 virtual ~GestureManager(); |
| 28 | 28 |
| 29 static GestureManager* GetInstance(); | 29 static GestureManager* GetInstance(); |
| 30 | 30 |
| 31 // Invoked for each touch event that could contribute to the current gesture. | 31 // Invoked for each touch event that could contribute to the current gesture. |
| 32 // Takes the event and the View that originated it and which will also | 32 // Takes the event and the View that originated it and which will also |
| 33 // be the target of any generated synthetic event. Finally, status | 33 // be the target of any generated synthetic event. Finally, status |
| 34 // specifies if a touch sequence is in progress or not, so that the | 34 // specifies if a touch sequence is in progress or not, so that the |
| 35 // GestureManager state can correctly reflect events that are handled | 35 // GestureManager state can correctly reflect events that are handled |
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| 48 private: | 48 private: |
| 49 friend struct DefaultSingletonTraits<GestureManager>; | 49 friend struct DefaultSingletonTraits<GestureManager>; |
| 50 | 50 |
| 51 DISALLOW_COPY_AND_ASSIGN(GestureManager); | 51 DISALLOW_COPY_AND_ASSIGN(GestureManager); |
| 52 }; | 52 }; |
| 53 | 53 |
| 54 | 54 |
| 55 } // namespace views | 55 } // namespace views |
| 56 | 56 |
| 57 #endif // VIEWS_TOUCHUI_GESTURE_MANAGER_H_ | 57 #endif // VIEWS_TOUCHUI_GESTURE_MANAGER_H_ |
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