chrome/browser/ui/ash/volume_controller_chromeos.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_UI_ASH_VOLUME_CONTROLLER_CHROMEOS_H_
   6 #define CHROME_BROWSER_UI_ASH_VOLUME_CONTROLLER_CHROMEOS_H_
   7
   8 #include "ash/volume_control_delegate.h"
   9 #include "base/basictypes.h"
  10 #include "base/compiler_specific.h"
  11 #include "chromeos/audio/cras_audio_handler.h"
  12
  13 // A class which controls volume when F8-10 or a multimedia key for volume is
  14 // pressed.
  15 class VolumeController : public ash::VolumeControlDelegate,
  16                          public chromeos::CrasAudioHandler::AudioObserver {
  17  public:
  18   VolumeController();
  19   virtual ~VolumeController();
  20
  21   // Overridden from ash::VolumeControlDelegate:
  22   virtual bool HandleVolumeMute(const ui::Accelerator& accelerator) OVERRIDE;
  23   virtual bool HandleVolumeDown(const ui::Accelerator& accelerator) OVERRIDE;
  24   virtual bool HandleVolumeUp(const ui::Accelerator& accelerator) OVERRIDE;
  25
  26   // Overridden from chromeos::CrasAudioHandler::AudioObserver.
  27   virtual void OnOutputVolumeChanged() OVERRIDE;
  28   virtual void OnOutputMuteChanged() OVERRIDE;
  29
  30  private:
  31
  32   DISALLOW_COPY_AND_ASSIGN(VolumeController);
  33 };
  34
  35 #endif  // CHROME_BROWSER_UI_ASH_VOLUME_CONTROLLER_CHROMEOS_H_