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#ifndef QSQLRELATIONALTABLEMODEL_H

#define QSQLRELATIONALTABLEMODEL_H

#include <QtSql/qsqltablemodel.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Sql)

class Q_SQL_EXPORT QSqlRelation

{

public:

    QSqlRelation() {}

    QSqlRelation(const QString &aTableName, const QString &indexCol,

               const QString &displayCol)

        : tName(aTableName), iColumn(indexCol), dColumn(displayCol) {}

    inline QString tableName() const

    { return tName; }

    inline QString indexColumn() const

    { return iColumn; }

    inline QString displayColumn() const

    { return dColumn; }

    inline bool isValid() const

    { return !(tName.isEmpty() || iColumn.isEmpty() || dColumn.isEmpty()); }

private:

    QString tName, iColumn, dColumn;

};

class QSqlRelationalTableModelPrivate;

class Q_SQL_EXPORT QSqlRelationalTableModel: public QSqlTableModel

{

    Q_OBJECT

public:

    explicit QSqlRelationalTableModel(QObject *parent = 0,

                                      QSqlDatabase db = QSqlDatabase());

    virtual ~QSqlRelationalTableModel();

    QVariant data(const QModelIndex &item, int role = Qt::DisplayRole) const;

    bool setData(const QModelIndex &item, const QVariant &value, int role = Qt::EditRole);

    bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex());

    void clear();

    bool select();

    void setTable(const QString &tableName);

    virtual void setRelation(int column, const QSqlRelation &relation);

    QSqlRelation relation(int column) const;

    virtual QSqlTableModel *relationModel(int column) const;

public Q_SLOTS:

    void revertRow(int row);

protected:

    QString selectStatement() const;

    bool updateRowInTable(int row, const QSqlRecord &values);

    bool insertRowIntoTable(const QSqlRecord &values);

    QString orderByClause() const;

private:

    Q_DECLARE_PRIVATE(QSqlRelationalTableModel)

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QSQLRELATIONALTABLEMODEL_H