ApplicationWindow as root object result in error

Hello friends,

I have expose one c++ classes to qml in a main.cpp file like this:

Code:

---

int main(int argc, char** argv)
{
    QGuiApplication app(argc, argv);
 
 
    qmlRegisterType<MyTestClass>("Test", 1, 0, "Test");
 
 
    QQuickView view;
    view.resize(800, 480);
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.setSource(QUrl("qrc:///main.qml"));
    view.show();
    return app.exec();
}

---

But my root object in qml is a ApplicationWindow object. So I get a

Quote:

---

QQuickView only supports loading of root objects that derive from QQuickItem.

---

So when I avoid the main.cpp I have to run the qml file with qmlscene. But I want to have an exe file. How can I use an main.cpp in combinatiion with a ApplicationWindow root object in a qml file?

Yours,

The error message is correct. ApplicationWindow is a QQuickWindow and not a QQuickItem. QQuickView is also a window which causes the problem. (you are creating a window in C++ that essentially is supposed to create another window declared in Qt Quick. If this is targetting Qt 5.1 there is a new QQmlApplicationEngine you can use for exactly this purpose. Alternatively is that you create a QQmlEngine yourself instead of a QQuickView to launch your qml file.

http://doc-snapshot.qt-project.org/q...ionengine.html

hello,
i had the same problem with Quickview but when i switched into QQmlApplicationEngine and then run the application nothing happens , i mean no gui is loaded only the application process is launched and no error is availble , any ideas plz ?
main.cpp :
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QQmlApplicationEngine engin(QUrl("qrc:/main.qml"));
return app.exec();
}

You are correct that QQmlApplicationEngine should be used. Just note that it doesn't show() the window, so you should explicitly set the visibility on the ApplicationWindow to true;