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qsqlrelationaltablemodel.h

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** This file is part of the QtSql module of the Qt Toolkit.
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** included in the packaging of this file.  Alternatively you may (at
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#ifndef QSQLRELATIONALTABLEMODEL_H
#define QSQLRELATIONALTABLEMODEL_H

#include <QtSql/qsqltablemodel.h>

QT_BEGIN_HEADER

QT_MODULE(Sql)

00053 class Q_SQL_EXPORT QSqlRelation
{
public:
00056     QSqlRelation() {}
00057     QSqlRelation(const QString &aTableName, const QString &indexCol,
               const QString &displayCol)
        : tName(aTableName), iColumn(indexCol), dColumn(displayCol) {}
00060     inline QString tableName() const
    { return tName; }
00062     inline QString indexColumn() const
    { return iColumn; }
00064     inline QString displayColumn() const
    { return dColumn; }
00066     inline bool isValid() const
    { return !(tName.isEmpty() || iColumn.isEmpty() || dColumn.isEmpty()); }
private:
    QString tName, iColumn, dColumn;
};

class QSqlRelationalTableModelPrivate;

00074 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_HEADER

#endif // QSQLRELATIONALTABLEMODEL_H

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