//! [0]
QDataWidgetMapper *mapper = new QDataWidgetMapper;
mapper->setModel(model);
mapper->addMapping(mySpinBox, 0);
mapper->addMapping(myLineEdit, 1);
mapper->addMapping(myCountryChooser, 2);
mapper->toFirst();
//! [0]


//! [1]
QDataWidgetMapper *mapper = new QDataWidgetMapper();
mapper->setModel(myModel);
mapper->addMapping(nameLineEdit, 0);
mapper->addMapping(ageSpinBox, 1);
//! [1]


//! [2]
QDataWidgetMapper *mapper = new QDataWidgetMapper(); 
connect(myTableView->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
        mapper, SLOT(setCurrentModelIndex(QModelIndex)));
//! [2]