content/browser/battery_status/battery_status_manager.h

   1 // Copyright 2014 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_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_
   6 #define CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "build/build_config.h"
  10 #include "content/browser/battery_status/battery_status_service.h"
  11
  12 namespace content {
  13
  14 // Platform specific manager class for fetching battery status data.
  15 class CONTENT_EXPORT BatteryStatusManager {
  16  public:
  17   // Creates a BatteryStatusManager object. |callback| should be called when the
  18   // battery status changes.
  19   static scoped_ptr<BatteryStatusManager> Create(
  20       const BatteryStatusService::BatteryUpdateCallback& callback);
  21
  22   virtual ~BatteryStatusManager() {}
  23
  24   // Start listening for battery status changes. New updates are signalled
  25   // by invoking the callback provided at construction time.
  26   // Note that this is called in the IO thread.
  27   virtual bool StartListeningBatteryChange() = 0;
  28
  29   // Stop listening for battery status changes.
  30   // Note that this is called in the IO thread.
  31   virtual void StopListeningBatteryChange() = 0;
  32 };
  33
  34 }  // namespace content
  35
  36 #endif  // CHROME_BROWSER_BATTERY_STATUS_BATTERY_STATUS_MANAGER_H_