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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 UI_EVENTS_GESTURES_GESTURE_TYPES_H_ | 5 #ifndef UI_EVENTS_GESTURES_GESTURE_TYPES_H_ |
| 6 #define UI_EVENTS_GESTURES_GESTURE_TYPES_H_ | 6 #define UI_EVENTS_GESTURES_GESTURE_TYPES_H_ |
| 7 | 7 |
| 8 #include "base/logging.h" | 8 #include "base/logging.h" |
| 9 #include "ui/events/event_constants.h" | 9 #include "ui/events/event_constants.h" |
| 10 #include "ui/events/events_export.h" | 10 #include "ui/events/events_export.h" |
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| 196 | 196 |
| 197 // An abstract type for consumers of gesture-events created by the | 197 // An abstract type for consumers of gesture-events created by the |
| 198 // gesture-recognizer. | 198 // gesture-recognizer. |
| 199 class EVENTS_EXPORT GestureConsumer { | 199 class EVENTS_EXPORT GestureConsumer { |
| 200 public: | 200 public: |
| 201 virtual ~GestureConsumer() {} | 201 virtual ~GestureConsumer() {} |
| 202 }; | 202 }; |
| 203 | 203 |
| 204 // GestureEventHelper creates implementation-specific gesture events and | 204 // GestureEventHelper creates implementation-specific gesture events and |
| 205 // can dispatch them. | 205 // can dispatch them. |
| 206 // TODO - check if this is necessary. |
| 206 class EVENTS_EXPORT GestureEventHelper { | 207 class EVENTS_EXPORT GestureEventHelper { |
| 207 public: | 208 public: |
| 208 virtual ~GestureEventHelper() { | 209 virtual ~GestureEventHelper() { |
| 209 } | 210 } |
| 210 | 211 |
| 211 // Returns true if this helper can dispatch events to |consumer|. | 212 // Returns true if this helper can dispatch events to |consumer|. |
| 212 virtual bool CanDispatchToConsumer(GestureConsumer* consumer) = 0; | 213 virtual bool CanDispatchToConsumer(GestureConsumer* consumer) = 0; |
| 213 virtual void DispatchPostponedGestureEvent(GestureEvent* event) = 0; | |
| 214 virtual void DispatchCancelTouchEvent(TouchEvent* event) = 0; | 214 virtual void DispatchCancelTouchEvent(TouchEvent* event) = 0; |
| 215 }; | 215 }; |
| 216 | 216 |
| 217 } // namespace ui | 217 } // namespace ui |
| 218 | 218 |
| 219 #endif // UI_EVENTS_GESTURES_GESTURE_TYPES_H_ | 219 #endif // UI_EVENTS_GESTURES_GESTURE_TYPES_H_ |
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