DelegateModel && QAbstractListModel, move element

[luca]

Hi all,
I have a C++ QAbstractListModel exposed to QML.
My QML list looks like the following:

ListView {
        id: mainListView
        model: DelegateModel {
            id: visualModel
            model: imageModel
            delegate: MainListDelegate {
            }
        }
}

where imageModel is my QAbstractListModel.
For my MainListDelegate I followed the example in

Examples/Qt-5.5/quick/draganddrop/

to move element by drag and drop and it works.

Now the problem is how to "reflect" the new sorting of the element in the main QAbstractListModel to be used in C++ space.

Is there a way?

Thanks