Question

Can anyone suggest a way to implement an undo feature?

Answer 1

Maybe you can store the chick they are currently tracking and the last frame number they clicked at for a new TimePoint, and then use a method to find the time point with that frame number in the AnimalTrack for that Chick, then remove that TimePoint from the AnimalTrack.

Answer 2

The Case Study in Skrien Chapter 8 discusses one approach, which basically involves storing a copy of the full state of the project every time a change gets made...

Answer 3

A way I did it is to remove the most recent TimePoint from the current Animal Track and back the window up one time step.

Answer 4

The 'Memento' pattern in Skrien chapter 8 might be useful