Qt 4.3: relationaltablemodel.cpp Example File (sql/relationaltablemodel/relationaltablemodel.cpp)

|  | 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 sales@trolltech.com.
    **
    ** 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();
     }