QTreeView appears un-ordered and without a scrollbar on startup

Hello,

I have a problem making QTreeView work as expected.

I'm trying to make a simple filesystem tree using QFileSystemModel. I made this to work, but when I start my application, in the first 0.5 - 1 seconds of running the program the tree appears [B]un-ordered[/B] (beginning with the home folder) and [B]without a scrollbar[/B]. Example pictures are as follows:

This is as it appears on the cold startup for the first 0.5 - 1 seconds:

[IMG]http://andromeda.kiwilight.com/~dule/upload/example_unsorted.png[/IMG]

This is as it appears after the previous image, that is, after 0.5 - 1 seconds:

[IMG]http://andromeda.kiwilight.com/~dule/upload/example_sorted.png[/IMG]

My code is as follows:

mainwindow.cpp
[CODE]#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow() {

QString startPath = QDir::currentPath();

// create system models ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

treeModel = new QFileSystemModel(this);
treeModel->setFilter(QDir::NoDotAndDotDot | QDir::AllDirs);
treeModel->setRootPath("/");

// tree ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

treeDock = new QDockWidget("Tree view", this);
treeView = new QTreeView(treeDock);

QWidget* dummyWidget = new QWidget(); //remove dock titlebar
treeDock->setTitleBarWidget(dummyWidget);

treeView->setModel(treeModel);
treeView->setHeaderHidden(true); //no headers
treeView->setUniformRowHeights(false); //better performance
treeView->hideColumn(1);
treeView->hideColumn(2);
treeView->hideColumn(3);
treeView->hideColumn(4);

treeView->setRootIndex(treeModel->index("/"));
treeView->setCurrentIndex(treeModel->index(startPath));
treeView->scrollTo(treeModel->index(startPath));

treeDock->setWidget(treeView); //add tree to dock
this->addDockWidget(Qt::LeftDockWidgetArea, treeDock);

// statusbar ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
status = statusBar();

}[/CODE]

(I do need the dock)

mainwindow.h
[CODE]#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QtCore>
#include <QtGui>

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
MainWindow();

private:
QFileSystemModel *treeModel;
QTreeView *treeView;
QDockWidget *treeDock;
QStatusBar *status;
QMenuBar *menuBar;

};

#endif // MAINWINDOW_H
[/CODE]

main.cpp
[CODE]#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

return a.exec();
}
[/CODE]

[B][COLOR="red"]=>[/COLOR][/B] [B]My QTCreator project file:[/B] [URL="http://andromeda.kiwilight.com/~dule/upload/cccc.tar.gz"]download here[/URL]

*

The problem is, I'm trying to [B]eliminate that interval when the tree is un-ordered and without a scrollbar[/B]. I want it to appear like in the second picture from the start.

I was going nuts trying to solve this but no luck...
Any help would be greatly appreciated!