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 namespace base {
  12 template <typename T> struct DefaultSingletonTraits;
  13 }
  14
  15 namespace chromeos {
  16
  17 // A class to record devices' input event details via the UMA system
  18 class DeviceUMA : public ui::PlatformEventObserver {
  19  public:
  20   // Getting instance starts the class automatically if it hasn't been
  21   // started before.
  22   static DeviceUMA* GetInstance();
  23
  24   void Stop();
  25
  26  private:
  27   friend struct base::DefaultSingletonTraits<DeviceUMA>;
  28
  29   DeviceUMA();
  30   ~DeviceUMA() override;
  31
  32   // ui::PlatformEventObserver:
  33   void WillProcessEvent(const ui::PlatformEvent& event) override;
  34   void DidProcessEvent(const ui::PlatformEvent& event) override;
  35
  36   // Check CrOS touchpad events to see if the metrics gesture is present
  37   void CheckTouchpadEvent(XEvent* event);
  38
  39   // Check the incoming events for interesting patterns that we care about.
  40   void CheckIncomingEvent(XEvent* event);
  41
  42   bool stopped_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(DeviceUMA);
  45 };
  46
  47 }  // namespace chromeos
  48
  49 #endif  // CHROME_BROWSER_CHROMEOS_DEVICE_UMA_H_