undo: split out EventBase class

All event-based commands will work on a dive computer and
need to replot the profile, etc. Therefore, in analogy to
the dive-list commands create a base class with two virtual
functions undoit() and redoit() that must be defined in the
derived classes that do the actual work.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

0 files changed, 0 insertions, 0 deletions