Is it possible to set the root object of an QQuickView?

[hesmar]

In C++ I created a QQuickItem and want to set this as the root object of a QQuickView. The following is a simplified part of my code:
@
void MyClass::showItem(QQuickItem *item)
{
//create the viewer
QQuickView *viewer = new QQuickView(m_engine, m_parent);

// here I want to set the item as root object

//show the viewer
viewer->show();

}
@

The item and the view were created using the same engine (m_engine). Unfortunately there is no method like "setRootItem(QQuickItem*)". Is there still the possibility to set the root item of a QQuickView?

Thanks!