Dialog QtQuick access problem

[Tycos]

Hi to everybody,

I've a little problem with the access to Dialog Qt Quick object from c++ side. When I try access to a Dialog object in qml I have some problem if it's not in a "Rectangle" or "Item" object.

main.cpp
@
#include <QApplication>
#include <QQmlApplicationEngine>
#include <QDebug>
#include <QObject>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);

QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:///main.qml")));

// Step 1: get access to the root object
QObject *rootObject = engine.rootObjects().first();
qDebug() << rootObject->objectName();

QObject *qmlObj = rootObject->findChild<QObject*>("testItem");
qDebug() << qmlObj->objectName();

QObject *qmlDialog = qmlObj->findChild<QObject*>("testObj");
qDebug() << qmlDialog->objectName();

// this doesn't works    
qmlDialog = rootObject->findChild<QObject*>("testObj2");
qDebug() << qmlDialog->objectName();

// this doesn't works
qmlDialog = rootObject->findChild<QObject*>("testObj3");
qDebug() << qmlDialog->objectName();

return app.exec&#40;&#41;;

}
@

main.qml
@
import QtQuick 2.2
import QtQuick.Window 2.0
import QtQuick.Dialogs 1.2
import QtQuick.Controls 1.2

Window {
id: mainWindow
objectName: "mainWindow"
visible: true
width: 640
height: 480

Item {
    id: testItem
    objectName: "testItem"
    Dialog {
        id: testObj
        objectName: "testObj"
        modality: Qt.WindowModal

        contentItem: Rectangle {
            Text {
                text: "Test Obj"
            }
        }
    }
}

MessageDialog {
    id: testObj2
    objectName: "testObj2"
    text: "Test Obj"
}

Dialog {
    id: testObj3
    objectName: "testObj3"
    modality: Qt.WindowModal

    contentItem: Rectangle {
        Text {
            text: "Test Obj"
        }
    }
}

}

@

In particular it doesn't works when I try to access at testObj2 and testObj3. Why?