grabToImage ready connection problems

[Bodda]

Re: Connecting a slot to a QSharedPointer (QQuickItem::grabToImage)

Hi,
I am trying to grabToImage on a QQuickItem that is pointed out by qml. But the connection in the cpp-file never gets triggered? My guess is that it is quick and gets triggered before the connection is created? If so, how can the connection be set up before calling grabToImage? Or is it something else that is faulty in this code?

The only thing printed out when this programis executed is:
grabImage, m_sourceItem = QQuickItem(0x65ac80, parent=0x6ce490, geometry=0,0 100x80)

cpp-file (only more relevant parts shown) for C++ component

void QmlImageGrabber::grabImage(){
    //qDebug below prints out:  
    //grabImage, m_sourceItem = QQuickItem(0x65ac80, parent=0x6ce490, geometry=0,0 100x80)
    qDebug() << "grabImage, m_sourceItem =" << m_sourceItem; 

    m_imageGrabResult = m_sourceItem->grabToImage().data();
    connect(m_imageGrabResult, &QQuickItemGrabResult::ready, this, &QmlImageGrabber::grabImageReady);
}

void QmlImageGrabber::grabImageReady(){
    qDebug() << "This is never printed out!";

    //connection purpose fullfilled, disconnect
    disconnect(m_imageGrabResult, &QQuickItemGrabResult::ready, this, &QmlImageGrabber::grabImageReady);

    //Here I will do something more

    emit sourceChanged();
}

h-file for C++ component

class QmlImageGrabber : public QObject
{
    Q_OBJECT

    Q_PROPERTY(QQuickItem *source READ source WRITE setSource NOTIFY sourceChanged);

public:
    QmlImageGrabber();
    ~QmlImageGrabber();

    QQuickItem* source();
    void setSource(QQuickItem *source);

signals:
    void sourceChanged();

private:
    void grabImage();
    void grabImageReady();

    QQuickItem *m_sourceItem = nullptr;
    QQuickItemGrabResult *m_imageGrabResult = nullptr;
};