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50#include <QCoreApplication>
51#include <QQmlEngine>
52#include <QQmlComponent>
53#include <QDebug>
54#include "birthdayparty.h"
55#include "person.h"
56
57int main(int argc, char ** argv)
58{
59 QCoreApplication app(argc, argv);
60
61 QQmlEngine engine;
62 QQmlComponent component(&engine, QUrl("qrc:example.qml"));
63 auto *party = qobject_cast<BirthdayParty *>(object: component.create());
64
65 if (party && party->host()) {
66 qWarning() << party->host()->name() << "is having a birthday!";
67
68 if (qobject_cast<Boy *>(object: party->host()))
69 qWarning() << "He is inviting:";
70 else
71 qWarning() << "She is inviting:";
72
73 Person *bestShoe = nullptr;
74 for (int ii = 0; ii < party->guestCount(); ++ii) {
75 Person *guest = party->guest(ii);
76 qWarning() << " " << guest->name();
77
78 if (!bestShoe || bestShoe->shoe()->price() < guest->shoe()->price())
79 bestShoe = guest;
80 }
81 if (bestShoe)
82 qWarning() << bestShoe->name() << "is wearing the best shoes!";
83
84 return EXIT_SUCCESS;
85 }
86
87 qWarning() << component.errors();
88 return EXIT_FAILURE;
89}
90

source code of qtdeclarative/examples/qml/referenceexamples/grouped/main.cpp