void PreviewImageProvider::setPixmap(const QByteArray &px)

    if(px.size() == 128 * 256)

    {

        QVector<QRgb> colorTable;

        colorTable.resize(256);

        for(int i = 0; i < 256; ++i)

            colorTable[i] = qRgba(255, 255, 0, i);

        const quint8 *buf = (const quint8*) px.constData();

        QImage im(buf, 256, 128, QImage::Format_Indexed8);

        im.setColorTable(colorTable);

        m_px = QPixmap::fromImage(im, Qt::ColorOnly);

        //QPixmap pxres(px.size());

        //QPainter p(&pxres);

        //p.fillRect(pxres.rect(), linearGrad);

        //p.drawPixmap(0, 0, px);

    }