blob: 994ac2bbef7ef85320c3fca384507da3c925c712 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_MODELS_COMBOBOX_MODEL_H_
#define UI_BASE_MODELS_COMBOBOX_MODEL_H_
#include "base/component_export.h"
#include "base/strings/string16.h"
namespace ui {
class ComboboxModelObserver;
class ImageModel;
// A data model for a combo box.
class COMPONENT_EXPORT(UI_BASE) ComboboxModel {
public:
virtual ~ComboboxModel() {}
// Returns the number of items in the combo box.
virtual int GetItemCount() const = 0;
// Returns the string at the specified index.
virtual base::string16 GetItemAt(int index) const = 0;
// Returns the string to be shown in the dropdown for the item at |index|. By
// default, it returns GetItemAt(index).
virtual base::string16 GetDropDownTextAt(int index) const;
// Returns the secondary string at the specified index. Secondary strings are
// displayed in a second line inside every menu item.
virtual base::string16 GetDropDownSecondaryTextAt(int index) const;
// Gets the icon for the item at the specified index. ImageModel is empty if
// there is no icon.
virtual ImageModel GetIconAt(int index) const;
// Gets the icon for the item at |index|. ImageModel is empty if there is no
// icon. By default, it returns GetIconAt(index).
virtual ImageModel GetDropDownIconAt(int index) const;
// Should return true if the item at |index| is a non-selectable separator
// item.
virtual bool IsItemSeparatorAt(int index) const;
// The index of the item that is selected by default (before user
// interaction).
virtual int GetDefaultIndex() const;
// Returns true if the item at |index| is enabled.
virtual bool IsItemEnabledAt(int index) const;
// Adds/removes an observer. Override if model supports mutation.
virtual void AddObserver(ComboboxModelObserver* observer) {}
virtual void RemoveObserver(ComboboxModelObserver* observer) {}
};
} // namespace ui
#endif // UI_BASE_MODELS_COMBOBOX_MODEL_H_
|
