async Task SetMapStationPins(Station[] stations, float alpha = 1)
{
var stationsToUpdate = stations.Where(station => {
Marker marker;
var stats = station.BikeCount + "|" + station.EmptySlotCount;
if (existingMarkers.TryGetValue(station.Id, out marker))
{
if (marker.Snippet == stats && !showedStale)
{
return(false);
}
marker.Remove();
}
return(true);
}).ToArray();
var pins = await Task.Run(() => stationsToUpdate.ToDictionary(station => station.Id, station => {
var w = 24.ToPixels ();
var h = 40.ToPixels ();
if (station.Locked)
{
return(pinFactory.GetClosedPin(w, h));
}
else if (!station.Installed)
{
return(pinFactory.GetNonInstalledPin(w, h));
}
var ratio = (float)TruncateDigit(station.BikeCount / ((float)station.Capacity), 2);
return(pinFactory.GetPin(ratio,
station.BikeCount,
w, h,
alpha: alpha));
}));
foreach (var station in stationsToUpdate)
{
var pin = pins [station.Id];
var snippet = station.BikeCount + "|" + station.EmptySlotCount;
if (station.Locked)
{
snippet = string.Empty;
}
else if (!station.Installed)
{
snippet = "not_installed";
}
var markerOptions = new MarkerOptions()
.SetTitle(station.Id + "|" + station.Street + "|" + station.Name)
.SetSnippet(snippet)
.SetPosition(new Android.Gms.Maps.Model.LatLng(station.Location.Lat, station.Location.Lon))
.InvokeIcon(BitmapDescriptorFactory.FromBitmap(pin));
existingMarkers [station.Id] = mapFragment.Map.AddMarker(markerOptions);
}
}
