QLocale is not working with Table View

CroCo

I'm hitting a walk with QTableView. I've tried to subclass its QHeaderView with no luck. I've came a cross a feature which is setting QLocale but failed. QLocale works with QDate Widget but failed with QTableView for numbering the vertical header view see the following picture:

Why it failed with QTableView? This is simple code. I don't feel I need to paste it but I will if you insist. Thank you.

Update:
The code is
dailog.cpp

#include "dialog.h"
#include "ui_dialog.h"

#include <QVBoxLayout>

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
   
    m_model = new QStandardItemModel(50,5,this);
    m_model->setHorizontalHeaderItem(0, new QStandardItem(QString("الرمز")));
    m_model->setHorizontalHeaderItem(1, new QStandardItem(QString("الصنف")));
    m_model->setHorizontalHeaderItem(2, new QStandardItem(QString("الكمية")));
    m_model->setHorizontalHeaderItem(3, new QStandardItem(QString("السعر")));
    m_model->setHorizontalHeaderItem(4, new QStandardItem(QString("الإجمالـي")));

    ui->tableview->setModel(m_model);
    ui->tableview->setLayoutDirection(Qt::RightToLeft);
    ui->tableview->verticalHeader()->setDefaultAlignment(Qt::AlignCenter);
    ui->tableview->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
    //ui->tableview->setHorizontalHeader(m_headerview);

    //QLocale arab(QLocale::Arabic, QLocale::SaudiArabia);
    //ui->tableview->setLocale(arab);
    //ui->tableview->verticalHeader()->setLocale(arab);
}

Dialog::~Dialog()
{
    delete ui;
}

dailog.h

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QStandardItemModel>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT

public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();

private:
    Ui::Dialog *ui;
    QStandardItemModel *m_model;
};

#endif // DIALOG_H

main.cpp

#include "dialog.h"
#include <QApplication>

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

    return a.exec();
}

In the form:

SGaist

Hi,

Yes, post the code. That will allow people to check what you did and test it also.

CroCo

@SGaist please see the update.