Comment 2 for bug 1887845

This should be easy! Have a look at
https://github.com/mixxxdj/mixxx/blob/master/src/library/autodj/dlgautodj.cpp
(sets up the library view incl. buttons and tooltips)
https://github.com/mixxxdj/mixxx/blob/master/src/library/autodj/autodjprocessor.cpp
(creates underlying controls and processes AutoDJ actions)

In case your unfamiliar with the bugfix workflow, check out those ressources:
https://github.com/mixxxdj/mixxx/wiki/Using-Git
https://github.com/mixxxdj/mixxx/wiki/Bugfix-Workflow