Конструктор:
{
    ...
    vLay = new QVBoxLayout;
    info = new QLabel;
    vLay->addWidget(info);
    setLayout(vLay);

//  showInfo(str_path);
    this->show();
    recSearch(str_path);
    showInfo(str_path);
}

   ....
   ....

// Функция которая подсчитывает
recSearch(QString s):
{
    ...
    //this->repaint();
    //info->repaint();
    ... 
    foreach(..)
    {
        if(AllFiles % 1000 == 0)
        {
           showInfo(str_path);
           info->repaint();
           this->repaint();
        }
        if( ... )
               recSearch(...);
        else if( ... )
               incFiles(SystemInfo::Audio); // увеличивает переменную       
     }
    //showInfo(str_path);
    return true;
}


showInfo(QString dir)
{
    QString result = "";
    result += "Path: " + dir + "\n"; 
    if(showAudio)
{
    result += "Audio:\t" +
              QString::number(AudioFiles, 10) +
              " files \t" +
              QString::number(printShortSize(sAudioFiles)) +
              printTextSize(sAudioFiles) + "\n";
}
    result += "All:\t" +
              QString::number(AllFiles, 10) +
              " files \t" +
              QString::number(printShortSize(sAllFiles)) +
              printTextSize(sAllFiles) + "\n";
    qDebug() << result;
    info->setText(result);
}