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      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_
     36