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Lemon POS is point of sale software for small and medium businesses. It is written in C++; uses the Qt 4, KDE Platform 4, and MySQL client libraries; and supports thermal printers, cash drawers, and barcode scanners. Qt is a cross-platform application framework and widget toolkit. Qt 5 adds support for running applications with a Wayland compositor (in a development Qt repository) and on a Linux framebuffer. KDE Platform 4 is a set of libraries that serve as the framework for the KDE Software Compilation 4 and various third-party applications. KDE Frameworks 5, the successor to KDE Platform 4, is more modular and better suited for general Qt-based applications than its predecessor is.

The first part of this project is to port Lemon POS to Qt 5 and KDE Frameworks 5, coordinating with the Lemon POS community. The second part of this project is to prepare ProteanOS packages for the Qt 5 base and SVG libraries as well as the KDE Frameworks 5 libraries used by Lemon POS. Depending on the student's time and interest, the project may be extended to include packages of additional dependencies of Lemon POS, including MySQL/MariaDB, and Lemon POS itself.

• Mentor: Patrick "P. J." McDermott
• Desirable skills: C++, Qt, Git, distribution packaging
• Project deliverables: Patches to port Lemon POS to Qt 5 and KDE Frameworks 5 and ProteanOS packages of at least some Lemon POS dependencies
• Difficulty: Medium

Tags: embedded, distribution, C++, Qt, KDE, packaging