Qt Reference Documentation

# main.cpp Example File

declarative/cppextensions/referenceexamples/coercion/main.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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     ** Contact: Nokia Corporation (qt-info@nokia.com)
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     ** This file is part of the examples of the Qt Toolkit.
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     #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");
     // ![0]
         qmlRegisterType<Person>();
     // ![0]
         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:";

             for (int ii = 0; ii < party->guestCount(); ++ii)
                 qWarning() << "   " << party->guest(ii)->name();
         } else {
             qWarning() << component.errors();
         }

         return 0;
     }