private void RefreshView(AddRemoveCollection addRemoveCollection, CancellationToken token)
{
if (token.IsCancellationRequested)
{
return;
}
// remove out of view items
foreach (var station in Items.Where(t => addRemoveCollection.ToRemove.Contains(t)).ToList())
{
var item = StationControls.First(c => c.Station.Latitude == station.Latitude && c.Station.Longitude == station.Longitude);
_clusterManager.RemoveItem(item);
StationControls.Remove(item);
Items.Remove(station);
station.Control = null;
if (station.IsInRefreshPool)
{
_contractService.RemoveStationFromRefreshingPool(station);
}
if (token.IsCancellationRequested)
{
return;
}
}
foreach (var station in addRemoveCollection.ToAdd.Where(t => !Items.Contains(t)).ToList())
{
var item = new ClusterItem(station.Latitude, station.Longitude)
{
Station = station
};
StationControls.Add(item);
_clusterManager.AddItem(item);
Items.Add(station);
if (token.IsCancellationRequested)
{
return;
}
}
_clusterManager.Cluster();
}
public async void OnMapReady(GoogleMap googleMap)
{
_gettingMap = false;
// TODO TO HELP DEBUG auto download paris to help dev on performances
//var contractToTest = "Paris";
//var contractService = SimpleIoc.Default.GetInstance<IContractService>();
//var contract = contractService.GetCountries().First(country => country.Contracts.Any(c => c.Name == contractToTest)).Contracts.First(c => c.Name == contractToTest);
//await SimpleIoc.Default.GetInstance<ContractsViewModel>().AddOrRemoveContract(contract);
_contractService = SimpleIoc.Default.GetInstance<IContractService>();
_contractService.ContractRefreshed += OnContractRefreshed;
_contractService.StationRefreshed += OnStationRefreshed;
// set the initial visual state of the bike/parking buttons
SwitchModeStationParkingVisualState();
_map = googleMap;
_maxZoom = _map.MaxZoomLevel;
LoadPreviousTile();
//Setup and customize your Google Map
_map.UiSettings.CompassEnabled = true;
_map.UiSettings.MyLocationButtonEnabled = false;
_map.UiSettings.MapToolbarEnabled = false;
_map.MyLocationEnabled = true;
// add padding to prevent action bar to hide the position button
//var dp = (int)(48 * Resources.DisplayMetrics.Xdpi / Resources.DisplayMetrics.Density);
//_map.SetPadding(0, dp, 0, 0);
//_map.vie
//View locationButton = suppormanagerObj.getView().findViewById(2);
//var rlp = (RelativeLayout.LayoutParams)locationButton.getLayoutParams();
//// position on right bottom
//rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0); rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
// Initialize the camera position
SetViewPoint(await GetStartingCameraPosition(), false);
// Initialize the marker with the stations
_clusterManager = new ClusterManager(this, _map);
_clusterRender = new StationRenderer(this, _map, _clusterManager);
_clusterManager.SetRenderer(_clusterRender);
_map.SetOnCameraChangeListener(_clusterManager);
// this disable the rest of the event handlers
// so there is no way to distinct a click on a cluster and a marker
_map.MarkerClick += _map_MarkerClick;
//_map.SetOnMarkerClickListener(new OnMarkerClickListener());
//_clusterManager.SetOnClusterClickListener(this);
//_clusterManager.SetOnClusterItemClickListener(this);
// check if the app contains a least one city, otherwise, tells the user to download one
MainViewModel.MainPageLoadedCommand.Execute(null);
// On long click, display the address on a info window
Observable.FromEventPattern<GoogleMap.MapLongClickEventArgs>(_map, "MapLongClick")
.Subscribe(e =>
{
AddPlaceMarker(e.EventArgs.Point, null, null);
SelectItem(e.EventArgs.Point);
//IList<Address> addresses = new List<Address>();
//try
//{
// // Convert latitude and longitude to an address (GeoCoder)
// addresses = await (new Geocoder(this).GetFromLocationAsync(currentMarkerPosition.Latitude, currentMarkerPosition.Longitude, 1));
//}
//catch (Exception ex)
//{
// Log.Debug("MyActivity", "Geocoder crashed: " + ex.Message);
//}
//return new AddressesFromLocationDTO { Addresses = addresses, Location = FormatLatLng(e.EventArgs.Point) };
});
_map.MapClick += _map_MapClick;
if (_parameterLat != 0 && _parameterLon != 0)
{
ShowIntentLocation();
}
else
{
// center the map on last user location
GetPreviousLastUserLocation();
}
// Initialize the behavior when long clicking somewhere on the map
//_map.MapLongClick += async (sender, e) =>
//{
// // On long click, display the address on a info window
// if (longClickMarker != null)
// {
// // Remove a previously created marker
// longClickMarker.Remove();
// }
// IList<Address> addresses = new List<Address>();
// currentMarkerPosition = e.Point;
// var latLongString = $"(latitude: { Math.Round(currentMarkerPosition.Latitude)}, longitude: { Math.Round(currentMarkerPosition.Longitude, 4)})";
// try
// {
// // Resolve the addresses (can throw an exception)
// var task = new Geocoder(this).GetFromLocationAsync(currentMarkerPosition.Latitude, currentMarkerPosition.Longitude, 1);
// AddressesFromLocationStream.OnNext(new AddressesFromLocationDTO { AddressesTask = task, Location = currentMarkerPosition });
// }
// catch (Exception)
// {
// // Ignore
// }
// finally
// {
// AddressesFromLocationStream.OnNext(new AddressesFromLocationDTO { Addresses = addresses, Location = currentMarkerPosition });
// }
//};
_contractService = SimpleIoc.Default.GetInstance<IContractService>();
var mapObserver = Observable.FromEventPattern(_map, "CameraChange");
TaskCompletionSource<bool> tcs;
mapObserver
.Do((e) =>
{
if (_map.CameraPosition.Zoom > _maxZoom)
{
_map.MoveCamera(CameraUpdateFactory.ZoomTo(_maxZoom));
}
cts.Cancel();
cts = new CancellationTokenSource();
}).Throttle(throttleTime)
.Select(async x =>
{
var stations = _contractService.GetStations();
// some services can provide wrong values in lat or lon... just take care of it
foreach (var station in stations.Where(s => s.Location == null))
{
station.Location = new LatLng(station.Latitude, station.Longitude);
}
LatLngBounds bounds = null;
tcs = new TaskCompletionSource<bool>();
RunOnUiThread(() =>
{
try
{
// can return null
bounds = _map.Projection.VisibleRegion.LatLngBounds;
}
catch
{
}
tcs.SetResult(true);
});
await tcs.Task;
var collection = new AddRemoveCollection();
if (bounds != null)
{
// extends slightly the bound view
// to provide a better experience
//bounds = MapHelper.extendLimits(bounds, 1);
collection.ToRemove = Items.Where(t => !bounds.Contains((LatLng)t.Location)).ToList();
collection.ToAdd = stations.Where(t => !Items.Contains(t)
&& bounds.Contains((LatLng)t.Location)).Take(MAX_CONTROLS).ToList();
if (Items.Count > MAX_CONTROLS + collection.ToRemove.Count)
collection.ToAdd.Clear();
}
// precalculate the items offset (that deffer well calculation)
//foreach (var velib in collection.ToAdd)
//{
// velib.GetOffsetLocation2(leftCornerLocation, zoomLevel);
//}
return collection;
})
.Switch()
.Subscribe(x =>
{
if (x == null)
return;
RunOnUiThread(() =>
{
RefreshView(x, cts.Token);
});
});
}
