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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 UI_BASE_MODELS_COMBOBOX_MODEL_H_ | 5 #ifndef UI_BASE_MODELS_COMBOBOX_MODEL_H_ |
6 #define UI_BASE_MODELS_COMBOBOX_MODEL_H_ | 6 #define UI_BASE_MODELS_COMBOBOX_MODEL_H_ |
7 | 7 |
8 #include "base/strings/string16.h" | 8 #include "base/strings/string16.h" |
9 #include "ui/base/ui_export.h" | 9 #include "ui/base/ui_base_export.h" |
10 | 10 |
11 namespace ui { | 11 namespace ui { |
12 | 12 |
13 class ComboboxModelObserver; | 13 class ComboboxModelObserver; |
14 | 14 |
15 // A data model for a combo box. | 15 // A data model for a combo box. |
16 class UI_EXPORT ComboboxModel { | 16 class UI_BASE_EXPORT ComboboxModel { |
17 public: | 17 public: |
18 // Returns the number of items in the combo box. | 18 // Returns the number of items in the combo box. |
19 virtual int GetItemCount() const = 0; | 19 virtual int GetItemCount() const = 0; |
20 | 20 |
21 // Returns the string at the specified index. | 21 // Returns the string at the specified index. |
22 virtual base::string16 GetItemAt(int index) = 0; | 22 virtual base::string16 GetItemAt(int index) = 0; |
23 | 23 |
24 // Should return true if the item at |index| is a non-selectable separator | 24 // Should return true if the item at |index| is a non-selectable separator |
25 // item. | 25 // item. |
26 virtual bool IsItemSeparatorAt(int index); | 26 virtual bool IsItemSeparatorAt(int index); |
27 | 27 |
28 // The index of the item that is selected by default (before user | 28 // The index of the item that is selected by default (before user |
29 // interaction). | 29 // interaction). |
30 virtual int GetDefaultIndex() const; | 30 virtual int GetDefaultIndex() const; |
31 | 31 |
32 // Returns true if the item at |index| is enabled. | 32 // Returns true if the item at |index| is enabled. |
33 virtual bool IsItemEnabledAt(int index) const; | 33 virtual bool IsItemEnabledAt(int index) const; |
34 | 34 |
35 // Adds/removes an observer. Override if model supports mutation. | 35 // Adds/removes an observer. Override if model supports mutation. |
36 virtual void AddObserver(ComboboxModelObserver* observer) {} | 36 virtual void AddObserver(ComboboxModelObserver* observer) {} |
37 virtual void RemoveObserver(ComboboxModelObserver* observer) {} | 37 virtual void RemoveObserver(ComboboxModelObserver* observer) {} |
38 | 38 |
39 protected: | 39 protected: |
40 virtual ~ComboboxModel() {} | 40 virtual ~ComboboxModel() {} |
41 }; | 41 }; |
42 | 42 |
43 } // namespace ui | 43 } // namespace ui |
44 | 44 |
45 #endif // UI_BASE_MODELS_COMBOBOX_MODEL_H_ | 45 #endif // UI_BASE_MODELS_COMBOBOX_MODEL_H_ |
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