void MainWindow::on_pushButton_clicked()
{
    QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"), "",
            tr("Text Files (*.txt)"));

        if (fileName != "") {
            QFile file(fileName);
            if (!file.open(QIODevice::ReadOnly)) {
                QMessageBox::critical(this, tr("Error"), tr("Could not open file"));
                return;
            }
            QTextStream textStream(&file);

            while (!textStream.atEnd()){
                line = textStream.readLine();
                lineElems = line.split(";");
                Hdd newElem;
                newElem.setId(lineElems.at(0).toInt());
                newElem.setBrand(lineElems.at(1));
                newElem.setModel(lineElems.at(2));
                newElem.setVolume(lineElems.at(3).toFloat());
                newElem.setFormFactor(lineElems.at(4));
                newElem.setWeight(lineElems.at(5).toFloat());
                newElem.setWidth(lineElems.at(6).toFloat());
                newElem.setHeight(lineElems.at(7).toFloat());
                newElem.setLength(lineElems.at(8).toFloat());
                newElem.setPrice(lineElems.at(9).toFloat());
                myList.append(newElem);
            }
            file.close();
        }
}