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1 // Copyright 2013 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_COMMON_SHELF_SHELF_MODEL_OBSERVER_H_ | |
6 #define ASH_COMMON_SHELF_SHELF_MODEL_OBSERVER_H_ | |
7 | |
8 #include "ash/ash_export.h" | |
9 #include "ash/common/shelf/shelf_item_types.h" | |
10 | |
11 namespace ash { | |
12 | |
13 struct ShelfItem; | |
14 class ShelfItemDelegate; | |
15 | |
16 class ASH_EXPORT ShelfModelObserver { | |
17 public: | |
18 // Invoked after an item has been added to the model. | |
19 virtual void ShelfItemAdded(int index) = 0; | |
20 | |
21 // Invoked after an item has been removed. |index| is the index the item was | |
22 // at. | |
23 virtual void ShelfItemRemoved(int index, ShelfID id) = 0; | |
24 | |
25 // Invoked after an item has been moved. See ShelfModel::Move() for details | |
26 // of the arguments. | |
27 virtual void ShelfItemMoved(int start_index, int target_index) = 0; | |
28 | |
29 // Invoked when the state of an item changes. |old_item| is the item | |
30 // before the change. | |
31 virtual void ShelfItemChanged(int index, const ShelfItem& old_item) = 0; | |
32 | |
33 // Gets called when a ShelfItemDelegate gets changed. Note that | |
34 // |item_delegate| can be null. | |
35 // NOTE: This is added a temporary fix for M39 to fix crbug.com/429870. | |
36 // TODO(skuhne): Find the real reason for this problem and remove this fix. | |
37 virtual void OnSetShelfItemDelegate(ShelfID id, | |
38 ShelfItemDelegate* item_delegate) = 0; | |
39 | |
40 protected: | |
41 virtual ~ShelfModelObserver() {} | |
42 }; | |
43 | |
44 } // namespace ash | |
45 | |
46 #endif // ASH_COMMON_SHELF_SHELF_MODEL_OBSERVER_H_ | |
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