/**
* Given a new arrival date, re-calculate the speed
*
* @param arrivalDate the new arrival date
*/
private void recalculateSpeeds(Date arrivalDate) {
// Stop widget listeners
boolean wasQuiescent = quiescent;
quiescent = true;
// Special case if the arrival date is before the start time
if (route.getStarttime().after(arrivalDate)) {
// Reset arrival to a valid time
arrivalPicker.setDate(route.getEta());
arrivalSpinner.setValue(route.getEta());
quiescent = wasQuiescent;
return;
}
// Total distance
Dist distanceToTravel = new Dist(DistType.NAUTICAL_MILES, route.getRouteDtg());
// And we want to get there in milliseconds:
Time timeToTravel =
new Time(TimeType.MILLISECONDS, arrivalDate.getTime() - route.getStarttime().getTime());
// Subtract the distance and time from the locked way points
for (int i = 0; i < route.getWaypoints().size() - 1; i++) {
if (locked[i]) {
distanceToTravel =
distanceToTravel.subtract(new Dist(DistType.NAUTICAL_MILES, route.getWpRng(i)));
timeToTravel =
timeToTravel.subtract(new Time(TimeType.MILLISECONDS, route.getWpTtg(i + 1)));
}
}
// Ensure the remaining time is actually positive (say, more than a minute)
if (timeToTravel.in(TimeType.MINUTES).doubleValue() < 1.0) {
// Reset arrival to a valid time
arrivalPicker.setDate(route.getEta());
arrivalSpinner.setValue(route.getEta());
quiescent = wasQuiescent;
return;
}
// So we need to travel how fast?
double speed = distanceToTravel.inTime(timeToTravel).in(SpeedType.KNOTS).doubleValue();
for (int i = 0; i < route.getWaypoints().size(); i++) {
if (!locked[i]) {
route.getWaypoints().get(i).setSpeed(speed);
}
}
// Update fields
updateFields();
// Restore the quiescent state
quiescent = wasQuiescent;
}
