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_SHELF_SHELF_MODEL_OBSERVER_H_ 6 #define ASH_SHELF_SHELF_MODEL_OBSERVER_H_ 7 8 #include "ash/ash_export.h" 9 #include "ash/shelf/shelf_item_types.h" 10 11 namespace ash { 12 13 struct ShelfItem; 14 15 class ASH_EXPORT ShelfModelObserver { 16 public: 17 // Invoked after an item has been added to the model. 18 virtual void ShelfItemAdded(int index) = 0; 19 20 // Invoked after an item has been removed. |index| is the index the item was 21 // at. 22 virtual void ShelfItemRemoved(int index, ShelfID id) = 0; 23 24 // Invoked after an item has been moved. See ShelfModel::Move() for details 25 // of the arguments. 26 virtual void ShelfItemMoved(int start_index, int target_index) = 0; 27 28 // Invoked when the state of an item changes. |old_item| is the item 29 // before the change. 30 virtual void ShelfItemChanged(int index, const ShelfItem& old_item) = 0; 31 32 // Invoked when shelf status is changed. 33 virtual void ShelfStatusChanged() = 0; 34 35 protected: 36 virtual ~ShelfModelObserver() {} 37 }; 38 39 } // namespace ash 40 41 #endif // ASH_SHELF_SHELF_MODEL_OBSERVER_H_ 42
