Is this the class that does the trick: http://apidocs.meego.com/1.2-preview/qtmobility/qgeoroutingmanager.html ?
Or there are some other ways of doing the same?
The Simple Routing example of the nokia forum wiki agrees with me: http://wiki.forum.nokia.com/index.php/Qt_Maps_Examples#SimpleRouting
EDIT All these explanations are w.r.t NOKIA's OVI maps. QtMobility doesn't support Google maps. :(