private void OnPositionChangedForeground(object sender, CustomPositionChangedEventArgs args)
{
IGPSTracker senderTracker = sender as IGPSTracker;
double? argSpeed = args.Speed;
if (argSpeed.HasValue)
{
double speed = (double) argSpeed;
//speed is NaN if connection is weak
bool connectionIsWeak = double.IsNaN(speed);
double totalPeriodCosts = 0;
if (!connectionIsWeak)
{
//Ignore very small speeds which usually aren't resulted by driving
if (speed < 1)
{
speed = 0;
}
//Calculate distances
// ReSharper disable once PossibleLossOfFraction
if (senderTracker != null)
{
_periodDistanceKm += (speed * (senderTracker.Interval / 1000)) / 1000;
}
//unit of interval is millisecond
_totalDistKm += _periodDistanceKm;
totalPeriodCosts = _periodDistanceKm * CostsPerKm;
//reset period distance because cost of it is added to users' bill
_periodDistanceKm = 0;
}
//Raise BillsChangedEvent via dispatcher
if (BillsChanged != null)
{
Action action =
delegate
{
BillsChanged(this,
new BillsChangedEventArgs(totalPeriodCosts, speed, _totalDistKm, connectionIsWeak));
};
_dispatcher.Invoke(action);
}
}
}
private void OnPositionChangedBackground(object sender, CustomPositionChangedEventArgs args)
{
//muutokset tulee tallentaa säännöllisesti siltä varalta, että käyttäjä
//ei palaa enää ohjelmaan. Päivitysväli on yksi kaksi minuuttia
if(_backgroundUpdateCounter >= 60)
{
_backgroundUpdateCounter = 0;
OnPositionChangedForeground(sender, args);
}
else
{
double? argSpeed = args.Speed;
if (argSpeed.HasValue)
{
double speed = (double)argSpeed;
if (!double.IsNaN(speed))
{
// ReSharper disable once PossibleLossOfFraction
double distKm = (speed * (_gpsTracker.Interval / 1000)) / 1000; //interval is milliseconds
//increase period distance so it can be added to users' bill when app is on foreground
_periodDistanceKm += distKm;
}
}
}
}
