[4.4.1] Feature request: QFileSystemModel::touch()

QModelIndex QFileSystemModel::touch(const QModelIndex &parent, const QString &name)
{
     Q_D(QFileSystemModel);

     if (!parent.isValid())
         return QModelIndex();

     QDir dir(filePath(parent));
        
      if (QFileInfo(dir.filePath(name)).exists())
              return index(dir.filePath(name));
        
      QFile file(dir.filePath(name));
      if (!file.open(QIODevice::WriteOnly))
              return QModelIndex();
      file.close();

     QFileSystemModelPrivate::QFileSystemNode *parentNode = d->node(parent);
     d->addNode(parentNode, name);
     int r = d->findChild(parentNode, QFileSystemModelPrivate::QFileSystemNode(name));
     Q_ASSERT(r >= 0);
     QFileSystemModelPrivate::QFileSystemNode *node = &parentNode->children[r];
 
     node->populate(d->fileInfoGatherer.getInfo(QFileInfo(dir.absolutePath() + QDir::separator() + name)));
     d->addVisibleFiles(parentNode, QStringList(name));
     return d->index(node);
}

void Browser::addButtonClicked()
{
     QModelIndex index = model->touch(parent, newName);
     treeView->setCurrentIndex(index);
     treeView->edit(index);
}