Home · All Classes · Main Classes · Grouped Classes · Modules · Functions

relationaltablemodel.cpp Example File
^{sql/relationaltablemodel/relationaltablemodel.cpp}

 /****************************************************************************
 **
 ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** 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 files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at [email protected].
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
 **
 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 **
 ****************************************************************************/

 #include <QtGui>
 #include <QtSql>

 #include "../connection.h"

 void initializeModel(QSqlRelationalTableModel *model)
 {
     model->setTable("employee");

     model->setEditStrategy(QSqlTableModel::OnManualSubmit);
     model->setRelation(2, QSqlRelation("city", "id", "name"));
     model->setRelation(3, QSqlRelation("country", "id", "name"));

     model->setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
     model->setHeaderData(1, Qt::Horizontal, QObject::tr("Name"));
     model->setHeaderData(2, Qt::Horizontal, QObject::tr("City"));
     model->setHeaderData(3, Qt::Horizontal, QObject::tr("Country"));

     model->select();
 }

 QTableView *createView(const QString &title, QSqlTableModel *model)
 {
     QTableView *view = new QTableView;
     view->setModel(model);
     view->setItemDelegate(new QSqlRelationalDelegate(view));
     view->setWindowTitle(title);
     return view;
 }

 void createRelationalTables()
 {
     QSqlQuery query;
     query.exec("create table employee(id int primary key, name varchar(20), city int, country int)");
     query.exec("insert into employee values(1, 'Espen', 5000, 47)");
     query.exec("insert into employee values(2, 'Harald', 80000, 49)");
     query.exec("insert into employee values(3, 'Sam', 100, 1)");

     query.exec("create table city(id int, name varchar(20))");
     query.exec("insert into city values(100, 'San Jose')");
     query.exec("insert into city values(5000, 'Oslo')");
     query.exec("insert into city values(80000, 'Munich')");

     query.exec("create table country(id int, name varchar(20))");
     query.exec("insert into country values(1, 'USA')");
     query.exec("insert into country values(47, 'Norway')");
     query.exec("insert into country values(49, 'Germany')");
 }

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     if (!createConnection())
         return 1;
     createRelationalTables();

     QSqlRelationalTableModel model;

     initializeModel(&model);

     QTableView *view = createView(QObject::tr("Relational Table Model"), &model);
     view->show();

     return app.exec();
 }