PDF Rendering
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The "Qt Wiki contains a nice article about the various options available for handling PDF documents":http://qt-project.org/wiki/Handling_PDF
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[quote author="langi667" date="1380449159"]Yes I already read the article, but all listed rendering libs are GPL and their seeding licenses are way to expensive. [/quote]
If you want to do it yourself the article provides ideas how to use QPrinter to create a PDF. Btw some of the libraries stated at the article are with LGPL and Apache 2.0 licence.