Hi, We released new POS Client version for Tryton 3.6 [1], it made with Qt5 (before 3.4 had Qt4) and 'build' with python 3, this module has a fork of proteus and other files of official client but this files was migrating to Python3 (Maybe help a little with port proteus to python3, in the official module, of course in the future ;) ), yes is a crazy experiment but works fine!, this client doesn't replace sale pos module [2], is a complement, and require the module sale_pos_printer[3], here you can to see a nice screenshot [4]
Thanks Oscar Alvarez Presik [1] https://bitbucket.org/presik/presik_pos_client_qt5 [2] https://bitbucket.org/zikzakmedia/trytond-sale_pos [3] https://bitbucket.org/presik/trytonpsk_sale_pos_printer [4] https://bitbucket.org/presik/presik_pos_client_qt5/downloads/screenshoot.png
