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Код

void MainWindow::addFileAction()
{
    QStringList fileNames = QFileDialog::getOpenFileNames(
        this,
        tr("Open Audio File"),
        QDesktopServices::storageLocation(QDesktopServices::MusicLocation),
        tr("Audio Files (*.mp3 *.wav)"));

    if (fileNames.empty())
    {
        return;
    }

    foreach (QString fileName, fileNames)
    {
        metaInformator->setCurrentSource(MediaSource(fileName));
        QMap<QString, QString> metaData = metaInformator->metaData();

        QString title = metaData.value("TITLE");
        QString artist = metaData.value("ARTIST");
        QString album = metaData.value("ALBUM");

        int n = playlistTable->rowCount();
        playlistTable->insertRow(n);
        QTableWidgetItem *titleItem = new QTableWidgetItem(title);
            titleItem->setFlags(titleItem->flags() ^ Qt::ItemIsEditable);
        QTableWidgetItem *artistItem = new QTableWidgetItem(artist);
            artistItem->setFlags(artistItem->flags() ^ Qt::ItemIsEditable);
        QTableWidgetItem *albumItem = new QTableWidgetItem(album);
            albumItem->setFlags(albumItem->flags() ^ Qt::ItemIsEditable);

        playlistTable->setItem(n, 0, titleItem);
        playlistTable->setItem(n, 1, artistItem);
        playlistTable->setItem(n, 2, albumItem);
    }
}