Hi, that would be very good - to create a page selection for QR code, and position as well.
Nikola
Positing QR code it's possible in current version, but not in frontpage, i put your suggestion in my github
you can follow it at https://github.com/bozoh/moodle-mod_simplecertificate/issues/23
Why use barcode ?, QR code can be read by any webcam, cellphone cameras,.... I don't see any advantage to put in barcode.
QR code is more appropriate to "encode" URL
how to encode url into qr code ?
the TCPDF lib has support to QR code, but a simple google search i found
http://raidenii.net/files/datasheets/misc/qr_code.pdf
http://www.thonky.com/qr-code-tutorial/