Exporting a document to PDF: Difference between revisions

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h1. Exporting a document to PDF
{{Cleanup|reason=No print support on mobile platform (iOS), different issues on different targets}}


Found it very easy to convert a QTextDocument to PDF in Qt. And useful in scenarios like creating reports etc.
{{LangSwitch}}


For example, Consider the following snippet,
For a more advanced example that can handle HTML5, see [https://doc.qt.io/qt-6/qtwebengine-webenginewidgets-html2pdf-example.html Qt WebEngine Widgets html2PDF example]


<code> QString fileName = QFileDialog::getSaveFileName(this, tr("Save File"),
Here is a minimal example of how to print a {{DocLink|QTextDocument}} to PDF:
"untitled",tr("PDF Document ('''.pdf)"));
QPrinter printer;
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName(fileName);
doc->print(&amp;printer); // doc is QTextDocument'''</code>


We can use the printer class to print the document to a file : a pdf file.
<syntaxhighlight lang="cpp">
#include <QtWidgets>
#ifndef QT_NO_PRINTER
#include <QPrinter>
#endif


'''Categories'''
int main(int argc, char *argv[])
[[snippets]]
{
    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);
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setPaperSize(QPrinter::A4);
    printer.setOutputFileName(fileName);
 
    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
    doc.print(&printer);
}
</syntaxhighlight>
 
[[Category:snippets]]

Latest revision as of 23:25, 22 November 2022

This article may require cleanup to meet the Qt Wiki's quality standards. Reason: No print support on mobile platform (iOS), different issues on different targets
Please improve this article if you can. Remove the {{cleanup}} tag and add this page to Updated pages list after it's clean.

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For a more advanced example that can handle HTML5, see Qt WebEngine Widgets html2PDF example

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

#include <QtWidgets>
#ifndef QT_NO_PRINTER
#include <QPrinter>
#endif

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);
    printer.setOutputFormat(QPrinter::PdfFormat);
    printer.setPaperSize(QPrinter::A4);
    printer.setOutputFileName(fileName);

    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
    doc.print(&printer);
}