Qt Reference Documentation

# main.cpp Example File

declarative/cppextensions/referenceexamples/binding/main.cpp

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     #include <QCoreApplication>
     #include <QDeclarativeEngine>
     #include <QDeclarativeComponent>
     #include <QDebug>
     #include "birthdayparty.h"
     #include "happybirthdaysong.h"
     #include "person.h"

     int main(int argc, char ** argv)
     {
         QCoreApplication app(argc, argv);
         qmlRegisterType<BirthdayPartyAttached>();
         qmlRegisterType<BirthdayParty>("People", 1,0, "BirthdayParty");
         qmlRegisterType<HappyBirthdaySong>("People", 1,0, "HappyBirthdaySong");
         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:";

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

                 QDate rsvpDate;
                 QObject *attached =
                     qmlAttachedPropertiesObject<BirthdayParty>(guest, false);
                 if (attached)
                     rsvpDate = attached->property("rsvp").toDate();

                 if (rsvpDate.isNull())
                     qWarning() << "   " << guest->name() << "RSVP date: Hasn't RSVP'd";
                 else
                     qWarning() << "   " << guest->name() << "RSVP date:" << qPrintable(rsvpDate.toString());
             }

             party->startParty();
         } else {
             qWarning() << component.errors();
         }

         return app.exec();
     }