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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef APP_TABLE_MODEL_OBSERVER_H_ | 5 #ifndef APP_TABLE_MODEL_OBSERVER_H_ |
6 #define APP_TABLE_MODEL_OBSERVER_H_ | 6 #define APP_TABLE_MODEL_OBSERVER_H_ |
7 | 7 |
8 // Observer for a TableModel. Anytime the model changes, it must notify its | 8 // Observer for a TableModel. Anytime the model changes, it must notify its |
9 // observer. | 9 // observer. |
10 class TableModelObserver { | 10 class TableModelObserver { |
11 public: | 11 public: |
12 // Invoked when the model has been completely changed. | 12 // Invoked when the model has been completely changed. |
13 virtual void OnModelChanged() = 0; | 13 virtual void OnModelChanged() = 0; |
14 | 14 |
15 // Invoked when a range of items has changed. | 15 // Invoked when a range of items has changed. |
16 virtual void OnItemsChanged(int start, int length) = 0; | 16 virtual void OnItemsChanged(int start, int length) = 0; |
17 | 17 |
18 // Invoked when new items are added. | 18 // Invoked when new items are added. |
19 virtual void OnItemsAdded(int start, int length) = 0; | 19 virtual void OnItemsAdded(int start, int length) = 0; |
20 | 20 |
21 // Invoked when a range of items has been removed. | 21 // Invoked when a range of items has been removed. |
22 virtual void OnItemsRemoved(int start, int length) = 0; | 22 virtual void OnItemsRemoved(int start, int length) = 0; |
23 | |
24 protected: | |
25 ~TableModelObserver() {} | |
26 }; | 23 }; |
27 | 24 |
28 #endif // APP_TABLE_MODEL_OBSERVER_H_ | 25 #endif // APP_TABLE_MODEL_OBSERVER_H_ |
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