Error when accessing C++ property or method from QML

[dalishi]

Hi I follow this tutorial but are not able to access property or method defined in C++ class.

I have a C++ class Interface defined:

class Interface : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QPointF vpose READ getVpose WRITE setVpose NOTIFY vposeChanged)

public:
    explicit Interface(int domainid=0, QObject *parent = nullptr);
    virtual ~Interface() override;

    QPointF getVpose() const {
            return vpose;
    }

    void setVpose(const QPointF &p) {
            if (p != vpose) {
                vpose = p;
                emit vposeChanged();
            }
    }

    Q_INVOKABLE void pushCoordinate(const int &index) {
            ...
    }

signals:
    void vposeChanged();

private:
    QPointF vpose; // vehicle pose
 
    int domain_id;
 };

in my main.cpp:

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);

    Interface interface;
    engine.rootContext()->setContextProperty("interface", &interface);
    engine.load(url);
    
    return app.exec();
    
}

In main.qml:

ApplicationWindow {
    id: appWindow
    property var map
    property var parameters
    property var fromCoordinate//: QtPositioning.coordinate(59.9483, 10.7695)
    property var toCoordinate//: QtPositioning.coordinate(59.9645, 10.671)

    property var testcplusplus: interface.vpose  // Line 13 here QCreator warning: expected token ";"

I got this error when compiling:

It seems QML does not recognize this interface variable from C++. Did I do something wrong?

[J.Hilk]

@dalishi choose an other name, interface seems to be something protected/internally used

[dalishi]

@J-Hilk Hi you saved my day, bro. Thanks so much!