qsqlrelationaltablemodel.h
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上传日期:2022-06-22
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- /****************************************************************************
- **
- ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
- ** Contact: Qt Software Information (qt-info@nokia.com)
- **
- ** This file is part of the QtSql module of the Qt Toolkit.
- **
- ** Commercial Usage
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- ** accordance with the Qt Commercial License Agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and Nokia.
- **
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License versions 2.0 or 3.0 as published by the Free
- ** Software Foundation and appearing in the file LICENSE.GPL included in
- ** the packaging of this file. Please review the following information
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- ** exception, Nokia gives you certain additional rights. These rights
- ** are described in the Nokia Qt GPL Exception version 1.3, included in
- ** the file GPL_EXCEPTION.txt in this package.
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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