ash/volume_control_delegate.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 ASH_VOLUME_CONTROL_DELEGATE_H_
   6 #define ASH_VOLUME_CONTROL_DELEGATE_H_
   7 #pragma once
   8
   9 namespace ui {
  10 class Accelerator;
  11 }  // namespace ui
  12
  13 namespace ash {
  14
  15 // Delegate for controlling the volume.
  16 class VolumeControlDelegate {
  17  public:
  18   virtual ~VolumeControlDelegate() {}
  19
  20   virtual bool HandleVolumeMute(const ui::Accelerator& accelerator) = 0;
  21   virtual bool HandleVolumeDown(const ui::Accelerator& accelerator) = 0;
  22   virtual bool HandleVolumeUp(const ui::Accelerator& accelerator) = 0;
  23 };
  24
  25 }  // namespace ash
  26
  27 #endif  // ASH_VOLUME_CONTROL_DELEGATE_H_