Implemented QML Dynamic View Ordering by Dragging View Items using this Qt tutorial: QML Dynamic View Ordering Tutorial. Only changed original underlying model which is QAbstractListModel descendant in our case. Model stores data in a QList<QObject*> objectList; field type.

Was necessary to change items order automatically in original underlying model as well (not only in DelegateModel) for other C++ and QML consumers where this order matters. Implemented this by adding void ObjectListModel::move(int from, int to) to the ObjectListModel implementation like I've mentioned here on Stackoverflow:

void ObjectListModel::move(int from, int to)
{
    if(0 <= from && from < count() && 0 <= to && to < count() && from != to) {
        if(from == to - 1) // Allow item moving to the bottom
            to = from++;

        beginMoveRows(QModelIndex(), from, from, QModelIndex(), to);
        objectList.move(from, to);
        endMoveRows();
    }
}

However another model consumer like MapItemView fails to use the model after beginMoveRows/endMoveRows calls: moved indicator item disappeared on the map (not destroyed or visibility changed) and other manipulations with the item crashes the app.

 Map {
     ...
     MapItemView {
         model: objectListModel

         delegate: SomeItemIndicator {
         }
     }
 }

Think Qt bug. Some other hacks like emitting dataChanged() signal, etc do not help as well.