openDesktop.org :
Qt Generic Compass (contribution to Qt framework)
Qt Widgets android gnome kde linux windows
Source (required if based on other people's work):
Generic compass depends on having a default accel, gyro and mag sensor. Tested under android, Sailfish OS and linux desktop; all other operating systems are not officially tested.
Check it out on real app: http://www.softairrealfight.net
Sample implementation in SoftairRealFight mobile application
