QFileDialog::setSelectedFiles() : opening QFileDialog with multiple files selected

Would be useful to have a setter function to suit function:
QStringList QFileDialog::selectedFiles () const

Is it possible to add this behavior to existing Qt 4.4.x and later with like following in a QFileDialog subclass:

setFileMode(QFileDialog::ExistingFiles);
...

QStringList currentList;
// populate with old values of QFileDialog::selectedFiles();
...

QListView view = findChild<QListView>("listView");
if (view && view->selectionModel()){
QItemSelectionModel *sectionModel = view->selectionModel();
QFileSystemModel model = (QFileSystemModel)view->model();
sectionModel->clear();
QModelIndex index;
foreach(const QString fileName, currentList)

{ index = model->index(fileName); if (index.isValid()) sectionModel->select(index, QItemSelectionModel::SelectCurrent|QItemSelectionModel::Rows); }

}else

{ qWarning() << "Did not find listview"; }