qt_s60_setPartialScreenInputMode function should also update inputcontext hints when mode changes.

 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    Q_DECL_IMPORT void qt_s60_setPartialScreenInputMode(bool enable);
    qt_s60_setPartialScreenInputMode(true);

    QDeclarativeView view;
    view.setSource(QUrl::fromLocalFile("myqml.qml"));
    view.show();
    return app.exec();
}

 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    QDeclarativeView view;
    view.setSource(QUrl::fromLocalFile("myqml.qml"));
    view.show();

    Q_DECL_IMPORT void qt_s60_setPartialScreenInputMode(bool enable);
    qt_s60_setPartialScreenInputMode(true);

    return app.exec();
}