使用qt + qprinter将工作网址添加到pdf中

Question

Is there a simple way to add a working/clikable url into a pdf, using c++, qt and the qprinter class? To clarify it a little bit: I want to add the url during generating a new document. I'm not trying to edit an existing pdf.

Answer 1

You can create a PDF with Qprinter using QTextDocument. QTextDocument has setHtml() method which lets you use html tags including <a> tag ( <a href='http://www.google.com'>google</a> ). After that, you can create PDF with that HTML using QTextDocument print() method.

Code Example:

QPrinter printer(QPrinter::HighResolution);
printer.setOutputFormat(QPrinter::PdfFormat);
printer.setOutputFileName("out.pdf");

QTextDocument document;
QString html = "<a href='http://www.google.com'>google</a>";
document.setHtml(html);

document.print( &printer ); 

After running this code you will have out.pdf file with a clickable text: "google" that links to "http://www.google.com"

PS You could even add an image using <img> tag.

Answer 2

I do not believe so, no. Qt doesn't have any classes for editing PDFs, and I'm not quite sure what you'd do with QPrinter. All QPrinter can do is generate new PDFs given a non-PDF source. PDFs are very nearly write-only. The format is proprietary and quite complicated, so in the free software world it is quite rare to see any sort of code that can do editing to PDFs beyond page reordering or other simple metadata changes. If you're trying to edit an existing PDF, you're most likely on your own.