// 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/strings/string16.h" #include "ui/base/ui_base_export.h" namespace ui { class ComboboxModelObserver; // A data model for a combo box. class UI_BASE_EXPORT ComboboxModel { public: // 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) = 0; // Should return true if the item at |index| is a non-selectable separator // item. virtual bool IsItemSeparatorAt(int index); // 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) {} protected: virtual ~ComboboxModel() {} }; } // namespace ui #endif // UI_BASE_MODELS_COMBOBOX_MODEL_H_