public static void GoToNextCheckpoint(BusOnRoad bor)
{
var svc = BusHelper.BusSvcs [bor.routeName];
if (bor.nextCheckpointEnumerator == null)
{
bor.nextCheckpointEnumerator = svc.checkpoints.GetEnumerator();
}
double longitude = BusHelper.BusStops [svc.firstStop].longitude;
double latitude = BusHelper.BusStops [svc.firstStop].latitude;
// update position based on checkpoint
if (bor.nextCheckpointEnumerator.MoveNext())
{
longitude = (double)bor.nextCheckpointEnumerator.Current;
}
else
{
BusHelper.RemoveBusOnRoad(bor.vehiclePlate);
return;
}
if (bor.nextCheckpointEnumerator.MoveNext())
{
latitude = (double)bor.nextCheckpointEnumerator.Current;
}
bor.longitude = longitude;
bor.latitude = latitude;
}
private async void UpdateBusPins()
{
while (true)
{
// skip update pins if map is freezed (user clicks on pin)
if (!FreezeMap)
{
// remove all bus pins
foreach (CustomPin p in map.BusPins)
{
map.Pins.Remove(p.Pin);
}
map.BusPins.Clear();
foreach (BusOnRoad bor in BusHelper.ActiveBuses.Values)
{
// move bus to next checkpoint on the route for simulation
// actual deployment: get real-time position of bus
BusSimulator.GoToNextCheckpoint(bor);
// add pin to map if service is to be shown on map
if (BusHelper.BusSvcs [bor.routeName].showOnMap)
{
var description = "Start: " + BusHelper.BusStops [bor.firstStop].name + "\n" +
"End: " + BusHelper.BusStops [bor.lastStop].name + "\n" +
"Approaching: " + BusHelper.BusStops [(string)bor.nextStopEnumerator.Current].name + "\n" +
"In: " + BusHelper.GetArrivalTiming(bor.vehiclePlate) + "\n";
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(bor.latitude, bor.longitude),
Label = bor.routeName,
Address = description
};
var bus = new CustomPin {
Pin = pin,
Id = bor.routeName,
Url = bor.routeName + ".png"
};
map.Pins.Add(pin);
map.BusPins.Add(bus);
}
}
// remove buses which has finished plying
List <BusOnRoad> finishedBuses = BusHelper.ActiveBuses.Values.Where(bor => bor.finished).ToList();
foreach (BusOnRoad bor in finishedBuses)
{
BusHelper.RemoveBusOnRoad(bor.vehiclePlate);
}
}
// continue after interval
await Task.Delay(TimeSpan.FromSeconds(SettingsVars.Variables ["REFRESH_BUS_INTERVAL"].value));
}
}