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/compiler_specific.h"
  10 #include "chromeos/audio/cras_audio_handler.h"
  11
  12 // A class which controls volume when F8-10 or a multimedia key for volume is
  13 // pressed.
  14 class VolumeController : public ash::VolumeControlDelegate,
  15                          public chromeos::CrasAudioHandler::AudioObserver {
  16  public:
  17   VolumeController();
  18   ~VolumeController() override;
  19
  20   // Overridden from ash::VolumeControlDelegate:
  21   void HandleVolumeMute(const ui::Accelerator& accelerator) override;
  22   void HandleVolumeDown(const ui::Accelerator& accelerator) override;
  23   void HandleVolumeUp(const ui::Accelerator& accelerator) override;
  24
  25   // Overridden from chromeos::CrasAudioHandler::AudioObserver.
  26   void OnOutputNodeVolumeChanged(uint64_t node_id, int volume) override;
  27   void OnOutputMuteChanged(bool mute_on, bool system_adjust) override;
  28
  29  private:
  30
  31   DISALLOW_COPY_AND_ASSIGN(VolumeController);
  32 };
  33
  34 #endif  // CHROME_BROWSER_UI_ASH_VOLUME_CONTROLLER_CHROMEOS_H_