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1 // Copyright 2016 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_SHELF_WM_SHELF_OBSERVER_H_ | |
6 #define ASH_SHELF_WM_SHELF_OBSERVER_H_ | |
7 | |
8 #include "ash/ash_export.h" | |
9 #include "ash/public/cpp/shelf_types.h" | |
10 | |
11 namespace ash { | |
12 | |
13 enum class AnimationChangeType; | |
14 | |
15 // Used to observe changes to the shelf. | |
16 class ASH_EXPORT WmShelfObserver { | |
17 public: | |
18 virtual void OnBackgroundTypeChanged(ShelfBackgroundType background_type, | |
19 AnimationChangeType change_type) {} | |
20 virtual void WillChangeVisibilityState(ShelfVisibilityState new_state) {} | |
21 virtual void OnAutoHideStateChanged(ShelfAutoHideState new_state) {} | |
22 virtual void OnShelfIconPositionsChanged() {} | |
23 | |
24 protected: | |
25 virtual ~WmShelfObserver() {} | |
26 }; | |
27 | |
28 } // namespace ash | |
29 | |
30 #endif // ASH_SHELF_WM_SHELF_OBSERVER_H_ | |
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