Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# main.cpp Example File

declarative/cppextensions/referenceexamples/grouped/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 <QCoreApplication>
     #include <QDeclarativeEngine>
     #include <QDeclarativeComponent>
     #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");

         QDeclarativeEngine engine;
         QDeclarativeComponent 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;
     }