QTreeView::ScrollTo does no scrolling

[xalam]

I am loading file system in QTreeView and than want to select a particular folder and make it visible. My code selects the folder and it expands it as well but it doesn't scroll to it so I have to do all the scrolling myself which gets annoying since I have to do it every time. Here is my code.
@ExplorerDialog::ExplorerDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::ProgenyFileDialog),
dirModel( NULL ),
selectionModel( NULL )
{
ui->setupUi(this);

dirModel = new FileSystemModelEx;

dirModel->setRootPath("c:/");

ui->treeViewFileSystem->setModel( dirModel);

QSettings settings;

QString sourcePath = settings.value(SOURCE_FOLDER, DEFAULT_SOURCE_FOLDER).toString();

QModelIndex folderIndex = dirModel->index( sourcePath );

ui->treeViewFileSystem->expand( folderIndex );
ui->treeViewFileSystem->scrollTo( folderIndex, QAbstractItemView::PositionAtTop );
ui->treeViewFileSystem->setColumnWidth(0, 200 );
ui->treeViewFileSystem->setCurrentIndex( folderIndex );

// set the left/right panes ratio 1:2
ui->splitter->setSizes( QList<int>() << 100 << 200 );

selectionModel = ui->treeViewFileSystem->selectionModel();

connect(selectionModel, SIGNAL( selectionChanged(const QItemSelection&, const QItemSelection &) ),
        this, SLOT(selectionChanged (const QItemSelection & , const QItemSelection & ) ) );

}@
What am I doing wrong?

[SGaist]

Hi,

You are doing it too early. QFileSystemModel uses a thread to populate its content so you have to connect a slot to the directoryLoaded signals and do your scroll in there.

Hope it helps