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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 ASH_KEYBOARD_UMA_EVENT_FILTER_H_ | 5 #ifndef ASH_KEYBOARD_UMA_EVENT_FILTER_H_ |
6 #define ASH_KEYBOARD_UMA_EVENT_FILTER_H_ | 6 #define ASH_KEYBOARD_UMA_EVENT_FILTER_H_ |
7 | 7 |
8 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
9 #include "base/time/time.h" | 9 #include "base/time/time.h" |
10 #include "ui/events/event_handler.h" | 10 #include "ui/events/event_handler.h" |
11 | 11 |
12 namespace ash { | 12 namespace ash { |
13 | 13 |
14 // EventFilter for tracking keyboard-related metrics, which intercepts events | 14 // EventFilter for tracking keyboard-related metrics, which intercepts events |
15 // before they are processed by the usual path and logs metrics about the | 15 // before they are processed by the usual path and logs metrics about the |
16 // events. | 16 // events. |
17 class KeyboardUMAEventFilter : public ui::EventHandler { | 17 class KeyboardUMAEventFilter : public ui::EventHandler { |
18 public: | 18 public: |
19 KeyboardUMAEventFilter(); | 19 KeyboardUMAEventFilter(); |
20 virtual ~KeyboardUMAEventFilter(); | 20 virtual ~KeyboardUMAEventFilter(); |
21 | 21 |
22 // ui::EventHandler overrides: | 22 // ui::EventHandler overrides: |
23 virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE; | 23 virtual void OnKeyEvent(ui::KeyEvent* event) override; |
24 | 24 |
25 private: | 25 private: |
26 // The timestamp of the last character keystroke. | 26 // The timestamp of the last character keystroke. |
27 base::TimeDelta last_keystroke_time_; | 27 base::TimeDelta last_keystroke_time_; |
28 | 28 |
29 DISALLOW_COPY_AND_ASSIGN(KeyboardUMAEventFilter); | 29 DISALLOW_COPY_AND_ASSIGN(KeyboardUMAEventFilter); |
30 }; | 30 }; |
31 | 31 |
32 } // namespace ash | 32 } // namespace ash |
33 | 33 |
34 #endif // ASH_KEYBOARD_UMA_EVENT_FILTER_H_ | 34 #endif // ASH_KEYBOARD_UMA_EVENT_FILTER_H_ |
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