URGENT HELP Code128 barcode printing

[georgeky]

I am having a major issue printing a readable barcode from QT on an epson M-T500 printer thermal receipt printer.

i am using the font from http://www.dafont.com/code-128.font

It prints th ebarcode but somehow its not printing the correct order

I even tried to hardcode the char with ascii code still does not work.

Any help will be much appreciated.

The Barcode text: MHB-6TG-6TG-GGHJ

My sample code:

QPrinter printer;
        QPainter painter;       
        painter.begin(&printer);
        double scaleFactor;
        scaleFactor = 1.0;
        QFont barcodefont = QFont("Code128", 32, QFont::Normal);
        barcodefont.setLetterSpacing(QFont::AbsoluteSpacing,1.0);
        painter.setFont(barcodefont);
        char mytext[20];
 
        mytext[0]= 204;
        mytext[1]=77;
        mytext[2]=72;
        mytext[3]=66;
        mytext[4]=45;
        mytext[5]=54;
        mytext[6]=84;
        mytext[7]=71;
        mytext[8]=45;
        mytext[9]=54;
        mytext[0]=84;
        mytext[11]=71;
        mytext[12]=45;
        mytext[13]=71;
        mytext[14]=71;
        mytext[15]=72;
        mytext[16]=74;
        mytext[17]=104;
        mytext[18]=206;
        mytext[19]=0;
        qDebug() << mytext;
        painter.drawText(-30, 370,mytext);
        painter.end();

QPrinter printer;
        QPainter painter;       
        painter.begin(&printer);
        double scaleFactor;
        scaleFactor = 1.0;
        QFont barcodefont = QFont("Code128", 32, QFont::Normal);
        barcodefont.setLetterSpacing(QFont::AbsoluteSpacing,1.0);
        painter.setFont(barcodefont);
        char mytext[20];

        mytext[0]= 204;
        mytext[1]=77;
        mytext[2]=72;
        mytext[3]=66;
        mytext[4]=45;
        mytext[5]=54;
        mytext[6]=84;
        mytext[7]=71;
        mytext[8]=45;
        mytext[9]=54;
        mytext[0]=84;
        mytext[11]=71;
        mytext[12]=45;
        mytext[13]=71;
        mytext[14]=71;
        mytext[15]=72;
        mytext[16]=74;
        mytext[17]=104;
        mytext[18]=206;
        mytext[19]=0;
        qDebug() << mytext;
        painter.drawText(-30, 370,mytext);
        painter.end();

To copy to clipboard, switch view to plain text mode 

[ChrisW67]

I assume the '\xCC' and '\xCE' characters are a start and end marker. Your array index 10 is mistyped, and I have converted it to a QByteArray. This code:

#include <QtGui>
#include <QDebug>
 
int main(int argc, char *argv[]) 
{
    QApplication app(argc, argv);
 
//    QPrinter printer;
//    printer.setOutputFormat(QPrinter::PdfFormat);
//    printer.setOutputFileName("test.pdf");
 
    QImage image(640, 100, QImage::Format_Mono);
    image.fill(1);
 
    QPainter painter;       
    painter.begin(&image);
 
    QFont barcodefont = QFont("code128", 32, QFont::Normal);
    barcodefont.setLetterSpacing(QFont::AbsoluteSpacing,10.0);  //deliberately spread out
    painter.setFont(barcodefont);
 
    QByteArray mytext("\xccMHB-6TG-6TG-GGHJ\xce");
    qDebug() << mytext;
    painter.drawText(10, 90, mytext);
    painter.end();
 
    image.save("test.png");
 
    return app.exec();
}

#include <QtGui>
#include <QDebug>

int main(int argc, char *argv[]) 
{
    QApplication app(argc, argv);

//    QPrinter printer;
//    printer.setOutputFormat(QPrinter::PdfFormat);
//    printer.setOutputFileName("test.pdf");

    QImage image(640, 100, QImage::Format_Mono);
    image.fill(1);

    QPainter painter;       
    painter.begin(&image);

    QFont barcodefont = QFont("code128", 32, QFont::Normal);
    barcodefont.setLetterSpacing(QFont::AbsoluteSpacing,10.0);  //deliberately spread out
    painter.setFont(barcodefont);

    QByteArray mytext("\xccMHB-6TG-6TG-GGHJ\xce");
    qDebug() << mytext;
    painter.drawText(10, 90, mytext);
    painter.end();

    image.save("test.png");

    return app.exec();
}

To copy to clipboard, switch view to plain text mode 

produces this output (this is the PNG, but the PDF looks the same):
test.png

The characters look good here.

[georgeky]

Thank You soo much for your help :-) Worked like a charm