src/chrome/browser/chromeos/power/power_button_observer.h

   1 // Copyright (c) 2012 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_POWER_POWER_BUTTON_OBSERVER_H_
   6 #define CHROME_BROWSER_CHROMEOS_POWER_POWER_BUTTON_OBSERVER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "chromeos/dbus/power_manager_client.h"
  11 #include "chromeos/dbus/session_manager_client.h"
  12 #include "content/public/browser/notification_observer.h"
  13 #include "content/public/browser/notification_registrar.h"
  14
  15 namespace chromeos {
  16
  17 // Listens for power button, login, and screen lock events and passes them to
  18 // the Aura shell's PowerButtonController class.
  19 class PowerButtonObserver : public content::NotificationObserver,
  20                             public PowerManagerClient::Observer,
  21                             public SessionManagerClient::Observer {
  22  public:
  23   // This class registers/unregisters itself as an observer in ctor/dtor.
  24   PowerButtonObserver();
  25   virtual ~PowerButtonObserver();
  26
  27  private:
  28   // content::NotificationObserver implementation:
  29   virtual void Observe(int type,
  30                        const content::NotificationSource& source,
  31                        const content::NotificationDetails& details) OVERRIDE;
  32
  33   // PowerManagerObserver implementation:
  34   virtual void PowerButtonEventReceived(
  35       bool down, const base::TimeTicks& timestamp) OVERRIDE;
  36
  37   // SessionManagerClient::Observer implementation:
  38   // TODO(derat): Remove this once the session manager is making LockScreen
  39   // method calls instead.
  40   virtual void LockScreen() OVERRIDE;
  41
  42   content::NotificationRegistrar registrar_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(PowerButtonObserver);
  45 };
  46
  47 }  // namespace chromeos
  48
  49 #endif  // CHROME_BROWSER_CHROMEOS_POWER_POWER_BUTTON_OBSERVER_H_