Qt 5.6 | Qt QML | Extending QML - Signal Support Example | main.cpp Example File

Qt 5.6.3 Reference Documentation

# main.cpp Example File

referenceexamples/signal/main.cpp

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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<BirthdayPartyAttached>();
          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:";

              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 0;
      }