I have a series of activities I would like to record as I work. I was thinking of having a button for each activity that would start a 'timer'. When a new button (activity) or a stop button is pressed it stops the timer on the last activity; an activity button would start the new activity's timer. Thus 'Activities'.......<Activity records.
Each record can easily have a creation time, but what's the neatest way to get the:
a) stop time (and thus time elapsed) and
b) sum all the times for each specific activity?