Exporting a document to PDF

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Below is a minimal example of how to print a QTextDocument to PDF:

#include <QtWidgets>
#include <QPrinter>
int main(int argc, char *argv[])
    QApplication app(argc, argv);
    QString fileName = QFileDialog::getSaveFileName((QWidget* )0, "Export PDF", QString(), "*.pdf");
    if (QFileInfo(fileName).suffix().isEmpty()) { fileName.append(".pdf"); }
    QPrinter printer(QPrinter::PrinterResolution);
    QTextDocument doc;
    doc.setHtml("<h1>Hello, World!</h1>\n<p>Lorem ipsum dolor sit amet, consectitur adipisci elit.</p>");
    doc.setPageSize(printer.pageRect().size()); // This is necessary if you want to hide the page number