| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_ |
| #define CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/event_types.h" |
| #include "base/message_loop/message_loop.h" |
| |
| template <typename T> struct DefaultSingletonTraits; |
| |
| namespace chromeos { |
| |
| // A class to record devices' input event details via the UMA system |
| class DeviceUMA : public base::MessageLoopForUI::Observer { |
| public: |
| // Getting instance starts the class automatically if it hasn't been |
| // started before. |
| static DeviceUMA* GetInstance(); |
| |
| void Stop(); |
| |
| private: |
| friend struct DefaultSingletonTraits<DeviceUMA>; |
| |
| DeviceUMA(); |
| virtual ~DeviceUMA(); |
| |
| // Start and stop observing events. |
| void AddMessageLoopObserver(); |
| void RemoveMessageLoopObserver(); |
| |
| // MessageLoopForUI::Observer overrides. |
| virtual base::EventStatus WillProcessEvent( |
| const base::NativeEvent& event) OVERRIDE; |
| virtual void DidProcessEvent(const base::NativeEvent& event) OVERRIDE; |
| |
| // Check CrOS touchpad events to see if the metrics gesture is present |
| void CheckTouchpadEvent(const base::NativeEvent& event); |
| |
| // Check the incoming events for interesting patterns that we care about. |
| void CheckIncomingEvent(const base::NativeEvent& event); |
| |
| bool is_observing_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DeviceUMA); |
| }; |
| |
| } // namespace chromeos |
| |
| #endif // CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_ |