chrome/browser/chromeos/device_uma.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_
   6 #define CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_
   7
   8 #include "base/basictypes.h"
   9 #include "ui/events/platform/platform_event_observer.h"
  10
  11 template <typename T> struct DefaultSingletonTraits;
  12
  13 namespace chromeos {
  14
  15 // A class to record devices' input event details via the UMA system
  16 class DeviceUMA : public ui::PlatformEventObserver {
  17  public:
  18   // Getting instance starts the class automatically if it hasn't been
  19   // started before.
  20   static DeviceUMA* GetInstance();
  21
  22   void Stop();
  23
  24  private:
  25   friend struct DefaultSingletonTraits<DeviceUMA>;
  26
  27   DeviceUMA();
  28   ~DeviceUMA() override;
  29
  30   // ui::PlatformEventObserver:
  31   void WillProcessEvent(const ui::PlatformEvent& event) override;
  32   void DidProcessEvent(const ui::PlatformEvent& event) override;
  33
  34   // Check CrOS touchpad events to see if the metrics gesture is present
  35   void CheckTouchpadEvent(XEvent* event);
  36
  37   // Check the incoming events for interesting patterns that we care about.
  38   void CheckIncomingEvent(XEvent* event);
  39
  40   bool stopped_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(DeviceUMA);
  43 };
  44
  45 }  // namespace chromeos
  46
  47 #endif  // CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_