| // Copyright 2016 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_SHELF_SHELF_OBSERVER_H_ |
| #define ASH_SHELF_SHELF_OBSERVER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "ash/public/cpp/shelf_types.h" |
| |
| namespace ash { |
| |
| enum class AnimationChangeType; |
| |
| // Used to observe changes to the shelf. |
| class ASH_EXPORT ShelfObserver { |
| public: |
| virtual void OnBackgroundTypeChanged(ShelfBackgroundType background_type, |
| AnimationChangeType change_type) {} |
| virtual void WillChangeVisibilityState(ShelfVisibilityState new_state) {} |
| virtual void OnAutoHideStateChanged(ShelfAutoHideState new_state) {} |
| virtual void OnShelfIconPositionsChanged() {} |
| |
| protected: |
| virtual ~ShelfObserver() {} |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_SHELF_SHELF_OBSERVER_H_ |