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/*
* Copyright 2017 Samsung Electronics Co., Ltd
*
* Licensed under the Flora License, Version 1.1 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://floralicense.org/license/
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MODEL_DATA_ITEM_H
#define MODEL_DATA_ITEM_H
#include <tizen.h>
#include "Utils/CallbackManager.h"
namespace Model
{
/**
* @brief Change types.
*/
enum ChangeType
{
ChangeNone,
ChangeUpdate,
ChangeInsert,
ChangeDelete
};
class EXPORT_API DataItem
{
public:
/**
* @brief Called after item was updated.
* @param[in] Which item data was updated (depends on the specific item)
* @param[in] Next item according to sort order
*/
typedef Utils::CallbackManager<int, DataItem *> UpdateCallback;
/**
* @brief Called before item is deleted.
*/
typedef Utils::CallbackManager<> DeleteCallback;
DataItem();
DataItem(const DataItem &that);
DataItem &operator=(const DataItem &that);
virtual ~DataItem() { }
/**
* @return ID.
*/
int getId() const;
/**
* @return Custom data associated with the item.
*/
void *getUserData() const;
/**
* @brief Set custom data associated with the item.
* @param[in] data Data to set
*/
void setUserData(void *data);
/**
* @return Whether the item was changed during update.
*/
bool isChanged() const;
/**
* @return Whether item is standalone (not managed by DataProvider).
*/
bool isStandalone() const;
/**
* @brief Set whether item is standalone or managed by DataProvider.
* @param[in] isStandalone Whether item is standalone
*/
void setStandalone(bool isStandalone);
/**
* @brief Add/remove update callback.
*/
UpdateCallback &onUpdated();
/**
* @brief Add/remove delete callback.
*/
DeleteCallback &onDeleted();
protected:
/**
* @brief Update item with new data.
* @param[in] data New item data
* @return Mask describing detected changes or 0 if none.
*/
int update(void *data);
/**
* @brief Set ID.
* @param[in] id Data item id
*/
void setId(int id);
/**
* @brief Mark item as changed with specified change type.
* @param[in] changeType Item change type
* @param[in] changes Which item data was updated if type is ChangeUpdate
*/
void setChanged(ChangeType changeType, int changes = 0);
/**
* @brief Called after setStandalone() to change item standalone state.
* @param[in] isStandalone Whether item is standalone
*/
virtual void onStandalone(bool isStandalone) { }
/**
* @brief Called after update() to update item data.
* @param[in] data New item data
* @return Mask specifying which item data was updated.
*/
virtual int onUpdate(void *data) { return 0; }
private:
friend class DataProvider;
void finishUpdate(DataItem *nextItem = nullptr);
int m_Id;
bool m_IsStandalone;
int m_Changes;
ChangeType m_ChangeType;
void *m_UserData;
UpdateCallback m_OnUpdated;
DeleteCallback m_OnDeleted;
};
}
#endif /* MODEL_DATA_ITEM_H */
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