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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_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_
#define ASH_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_
#include "ash/ash_export.h"
namespace ash {
class ASH_EXPORT WallpaperControllerObserver {
public:
// Invoked when the colors extracted from the current wallpaper change.
virtual void OnWallpaperColorsChanged() {}
// Invoked when the blur state of the wallpaper changes.
virtual void OnWallpaperBlurChanged() {}
// Invoked when the wallpaper preview mode starts.
virtual void OnWallpaperPreviewStarted() {}
protected:
virtual ~WallpaperControllerObserver() {}
};
} // namespace ash
#endif // ASH_WALLPAPER_WALLPAPER_CONTROLLER_OBSERVER_H_