Update of all metrics to work with a RideItem
not directly with a RideFile.
When iterating over the activity samples we now
use a Specification and RideFileIterator to bound
the set of samples used. This means that we can
compute metrics for intervals without having to
create a temporary ridefile.
RideItem now has first class members for zoneRange,
hrZoneRange and paceZoneRange to avoid calculating
for every metric which are stored in RideDB.json.
Compare pane continues to construct a ride file
when working with intervals since it is used lots
of charts, this is unlikely to ever change.
A SEGV in compare intervals has been fixed where
interval items were repointed to temporary compare
pane objects that are deleted - see RideItem::setFrom.
THIS COMMIT CONTAINS 3 REGRESSIONS:
1. TcxRideFile no longer computes metrics
2. FitlogRideFile no longer computes metrics
3. WorkoutWizard no longer computes metrics
-- The workout wizard will be replaced with a new
Workout editor, whilst the RideFile metrics
may be deprecated (but considering options)
