- Qt 5.5
- Qt SQL
- Query Model Example
- main.cpp Example File
- Qt 5.5.1 Reference Documentation

# main.cpp Example File

querymodel/main.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of The Qt Company Ltd nor the names of its
    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #include <QtWidgets>

    #include "../connection.h"
    #include "customsqlmodel.h"
    #include "editablesqlmodel.h"

    void initializeModel(QSqlQueryModel *model)
    {
        model->setQuery("select * from person");
        model->setHeaderData(0, Qt::Horizontal, QObject::tr("ID"));
        model->setHeaderData(1, Qt::Horizontal, QObject::tr("First name"));
        model->setHeaderData(2, Qt::Horizontal, QObject::tr("Last name"));
    }

    QTableView* createView(QSqlQueryModel *model, const QString &title = "")
    {
        QTableView *view = new QTableView;
        view->setModel(model);
        static int offset = 0;

        view->setWindowTitle(title);
        view->move(100 + offset, 100 + offset);
        offset += 20;
        view->show();

        return view;
    }

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

        QSqlQueryModel plainModel;
        EditableSqlModel editableModel;
        CustomSqlModel customModel;

        initializeModel(&plainModel);
        initializeModel(&editableModel);
        initializeModel(&customModel);

        createView(&plainModel, QObject::tr("Plain Query Model"));
        createView(&editableModel, QObject::tr("Editable Query Model"));
        createView(&customModel, QObject::tr("Custom Query Model"));

        return app.exec();
    }