Can somebody show how to read bytes?

[mcosta]

Why doesn't work?

This code

void Widget::on_openFileButton_clicked()
{
    QString fileName = QFileDialog::getOpenFileName (
                this,
                tr ("Open File"),
                ".",
                tr ("Executable files (*exe)"));
 
    if (!fileName.isEmpty ()) {
        QFile f (fileName);
 
        const int SIZE = 100;
        int readSize;
 
        f.open (QIODevice::ReadOnly);
        readSize = (f.size () > SIZE)? SIZE: f.size ();
 
        QByteArray ba = f.read (readSize);
 
        ui->rawDataEdit->setPlainText (ba);
        ui->hexDataEdit->setPlainText (ba.toHex ());
    }
}

void Widget::on_openFileButton_clicked()
{
    QString fileName = QFileDialog::getOpenFileName (
                this,
                tr ("Open File"),
                ".",
                tr ("Executable files (*exe)"));

    if (!fileName.isEmpty ()) {
        QFile f (fileName);

        const int SIZE = 100;
        int readSize;

        f.open (QIODevice::ReadOnly);
        readSize = (f.size () > SIZE)? SIZE: f.size ();

        QByteArray ba = f.read (readSize);

        ui->rawDataEdit->setPlainText (ba);
        ui->hexDataEdit->setPlainText (ba.toHex ());
    }
}

To copy to clipboard, switch view to plain text mode 

shows this output when I select a EXE file

imagine1.JPG