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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_VOLUME_CONTROL_DELEGATE_H_
#define ASH_VOLUME_CONTROL_DELEGATE_H_
namespace ui {
class Accelerator;
} // namespace ui
namespace ash {
// Delegate for controlling the volume.
class VolumeControlDelegate {
public:
virtual ~VolumeControlDelegate() {}
virtual bool HandleVolumeMute(const ui::Accelerator& accelerator) = 0;
virtual bool HandleVolumeDown(const ui::Accelerator& accelerator) = 0;
virtual bool HandleVolumeUp(const ui::Accelerator& accelerator) = 0;
// Is the system audio muted?
virtual bool IsAudioMuted() const = 0;
// Mutes/Unmutes the audio system.
virtual void SetAudioMuted(bool muted) = 0;
// Gets the volume level. The range is [0, 1.0].
virtual float GetVolumeLevel() const = 0;
// Sets the volume level. The range is [0, 1.0].
virtual void SetVolumeLevel(float level) = 0;
// Requests that the volume be set to |percent|, in the range
// [0.0, 100.0].
virtual void SetVolumePercent(double percent) = 0;
};
} // namespace ash
#endif // ASH_VOLUME_CONTROL_DELEGATE_H_
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