Add Component to QQmlListProperty from C++?

[Prochy]

Hi,

i'm trying to add Component to QQmlListProperty from C++, but i am unable to do so. I've tried almost everything. I'm trying to solve on a Example: Writing QML Extensions with C++ (Chapter 5).

I tried it in the following way:

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
    QQmlApplicationEngine* engine = new QQmlApplicationEngine();
    QQmlComponent* myComponent = new QQmlComponent(engine, engine);

    qmlRegisterType<PieChart>("Charts", 1, 0, "PieChart");
    qmlRegisterType<PieSlice>("Charts", 1, 0, "PieSlice");
    myComponent->loadUrl(QUrl(QStringLiteral("qrc:///app.qml")));
    QObject* myComponentObj=myComponent->create();
    PieChart *chart = myComponentObj->findChild<PieChart*>("PieChart");
    PieSlice *slice = new PieSlice();
    slice->setColor(QColor(0,0,0,255));
    slice->setFromAngle(110);
    slice->setAngleSpan(50);
    slice->setVisible(true);        
    chart->addSlice(slice);
    return app.exec();
}

QQmlListProperty<PieSlice> PieChart::slices()
{
    return QQmlListProperty<PieSlice>(this, 0, &PieChart::append_slice, 0, 0, 0);
}

void PieChart::append_slice(QQmlListProperty<PieSlice> *list, PieSlice *slice)
{    
    PieChart *chart = qobject_cast<PieChart *>(list->object);
    if (chart) {
        slice->setParentItem(chart);
        chart->m_slices.append(slice);
    }

}
//![0]

void PieChart::addSlice(PieSlice *slice){    
    QQmlListProperty<PieSlice> pieSlice=slices();
    PieChart::append_slice(&pieSlice,slice);
}

Second try:
Directly set QList<PieSlice*> chart->m_slices.append(slice);, but this also does not working. :( Method paint(QPainter *painter) in PieSlice.cpp does not call.
Is it possible to solve this problem?
Thank you for help

[dheerendra]

once you create list you will not be able to modify the list. Note that objects cannot be individually added to or removed from the list once created; to modify the contents of a list, it must be reassigned to a new list.

[Prochy]

@dheerendra
Okay, thanks for reply. At last i used static items.