code ตัวอย่าง qt print document

#include <QPainter>
#include <QPrinter>

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.
.

//======= save as pdf file ==============//
    QPrinter printer;
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setOutputFileName("/your/directory/your/file.pdf");
    QPainter painter;
    if(!painter.begin(&printer))    // fail to open file
    {
        qWarning("fail to open file.");
        return ;
    }
    painter.drawText(320,80,"your text1");
    painter.drawText(100,110,"your text2");
    painter.drawText(100,140,"your text3");

    //======== drawing next page ==========//
    /*if(!printer.newPage())
    {
        qWarning("fail in flushing page to disk.");
        return;
    }
    painter.drawText(10,10,"Test 2");*/
    //==============================//

    painter.end();

ที่มา
https://www.youtube.com/watch?v=lA5D8b_QPxo