private void LoadNearestStations()
{
if (nearestLazyBlock != null)
{
nearestLazyBlock.Cancel();
}
var lazyBlockUI = new LazyBlockUI <Tuple <double, Station> >(this, nearestStations, nearestStationsMessageTextBlock, null);
LatLong from;
if (fromStation == null)
{
var currentPosition = LocationService.CurrentPosition;
if (!Settings.GetBool(Setting.LocationServicesEnabled))
{
lazyBlockUI.SetItems(null);
lazyBlockUI.SetLocalProgressMessage("Locations Services are disabled.\nYou can enable them in the Settings.");
nearestLazyBlock = null;
return;
}
else if (currentPosition == null || currentPosition.IsUnknown)
{
lazyBlockUI.SetLocalProgressMessage("Acquiring position...");
lazyBlockUI.SetGlobalProgressMessage("Acquiring position...");
nearestLazyBlock = null;
return;
}
from = LatLong.Create(currentPosition.Latitude, currentPosition.Longitude);
}
else
{
from = fromStation.Location;
}
lazyBlockUI.SetLocalProgressMessage("");
lazyBlockUI.SetGlobalProgressMessage("");
nearestLazyBlock = new LazyBlock <Tuple <double, Station>[]>(
"nearest stations",
"No nearby stations",
Stations.GetNearestAsync(from, 150),
items => items.Length == 0,
lazyBlockUI,
false,
null,
null,
nearestUnfiltered =>
{
var nearestFiltered = nearestUnfiltered.AsEnumerable();
if (fromStation != null)
{
nearestFiltered = nearestFiltered.Where(t => t.Item2.Code != fromStation.Code);
}
if (excludeStation != null)
{
nearestFiltered = nearestFiltered.Where(t => t.Item2.Code != excludeStation);
}
return(nearestFiltered.ToArray());
});
}