- Qt 5.3
- Qt QML
- Extending QML - Grouped Properties Example
- main.cpp Example File
- Qt 5.3.2 Reference Documentation

# main.cpp Example File

referenceexamples/grouped/main.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** 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 Digia Plc and its Subsidiary(-ies) 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."
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    ****************************************************************************/
    #include <QCoreApplication>
    #include <QQmlEngine>
    #include <QQmlComponent>
    #include <QDebug>
    #include "birthdayparty.h"
    #include "person.h"

    int main(int argc, char ** argv)
    {
        QCoreApplication app(argc, argv);

        qmlRegisterType<BirthdayParty>("People", 1,0, "BirthdayParty");
        qmlRegisterType<ShoeDescription>();
        qmlRegisterType<Person>();
        qmlRegisterType<Boy>("People", 1,0, "Boy");
        qmlRegisterType<Girl>("People", 1,0, "Girl");

        QQmlEngine engine;
        QQmlComponent component(&engine, QUrl("qrc:example.qml"));
        BirthdayParty *party = qobject_cast<BirthdayParty *>(component.create());

        if (party && party->host()) {
            qWarning() << party->host()->name() << "is having a birthday!";

            if (qobject_cast<Boy *>(party->host()))
                qWarning() << "He is inviting:";
            else
                qWarning() << "She is inviting:";

            Person *bestShoe = 0;
            for (int ii = 0; ii < party->guestCount(); ++ii) {
                Person *guest = party->guest(ii);
                qWarning() << "   " << guest->name();

                if (!bestShoe || bestShoe->shoe()->price() < guest->shoe()->price())
                    bestShoe = guest;
            }
            if (bestShoe)
                qWarning() << bestShoe->name() << "is wearing the best shoes!";

        } else {
            qWarning() << component.errors();
        }

        return 0;
    }