private void AddSubscribers()
{
var cameraPositionIdle = Observable
.FromEventPattern <EventHandler <GMSCameraEventArgs>, GMSCameraEventArgs>(
e => _mapView.CameraPositionIdle += e,
e => _mapView.CameraPositionIdle -= e);
ViewModel.CameraPositionChanged = cameraPositionIdle
.Select(e => e.EventArgs.Position.Target.ToLocation());
ViewModel.VisibleRegionChanged = cameraPositionIdle
.Select(_ => new CoordinateBounds(_mapView.Projection.VisibleRegion))
.Select(bounds => _visibleRegionProvider.GetVisibleRegion(bounds.NorthEast.ToLocation(), bounds.SouthWest.ToLocation()));
ViewModel.CameraStartMoving = Observable
.FromEventPattern <EventHandler <GMSWillMoveEventArgs>, GMSWillMoveEventArgs>(
e => _mapView.WillMove += e,
e => _mapView.WillMove -= e)
.Select(e => e.EventArgs.Gesture);
ViewModel.CameraStartMoving
.Subscribe(CameraWillMove);
ViewModel.CameraPositionChanged
.Subscribe(CamerPostionIdle);
}
private async System.Threading.Tasks.Task SetupBindings()
{
var cameraPositionIdle = Observable
.FromEventPattern <EventHandler, EventArgs>(
e => _googleMap.CameraIdle += e,
e => _googleMap.CameraIdle -= e);
ViewModel.CameraPositionChanged = cameraPositionIdle
.Do(CamerPositionIdle)
.Select(_ => _googleMap.CameraPosition.Target)
.Select(target => new Location(target.Latitude, target.Longitude));
ViewModel.VisibleRegionChanged = cameraPositionIdle
.Select(_ => _googleMap.Projection.VisibleRegion.LatLngBounds)
.Select(bounds => _visibleRegionProvider.GetVisibleRegion(bounds.Northeast.ToLocation(), bounds.Southwest.ToLocation()));
ViewModel.CameraStartMoving = Observable
.FromEventPattern <EventHandler <GoogleMap.CameraMoveStartedEventArgs>, GoogleMap.CameraMoveStartedEventArgs>(
e => _googleMap.CameraMoveStarted += e,
e => _googleMap.CameraMoveStarted -= e)
.Do(CameraStarted)
.Select(e => true);
ViewModel.Changed(() => ViewModel.OnlineDrivers)
.Where(od => _googleMap != null && od.Any())
.SubscribeOn(_schedulerProvider.SynchronizationContextScheduler)
.Subscribe(async od =>
{
var zoomLevel = _googleMap.CameraPosition.Zoom;
var width = _markerSizeProvider.GetWidth(zoomLevel);
var height = _markerSizeProvider.GetHeight(zoomLevel);
var bitmapSource = await BitmapFactory.DecodeResourceAsync(Resources, Resource.Drawable.car);
var bitmap = Bitmap.CreateScaledBitmap(bitmapSource, width, height, false);
var icon = BitmapDescriptorFactory.FromBitmap(bitmap);
_googleMap.Clear();
foreach (var onlineDriver in ViewModel.OnlineDrivers)
{
_googleMap.AddMarker(_markerAdapter.GetMarkerOptions(onlineDriver).SetIcon(icon));
}
});
this.SetBinding(() => ViewModel.CameraTarget)
.WhenSourceChanges(() =>
{
var camera = CameraUpdateFactory.NewLatLngZoom(new LatLng(ViewModel.CameraTarget.Latitude, ViewModel.CameraTarget.Longitude), 17);
_googleMap?.MoveCamera(camera);
});
this.SetBinding(() => ViewModel.TripLocationViewModel.PickupAddress.Loading)
.WhenSourceChanges(() =>
{
_pickupAddressLoading.Visibility =
ViewModel.TripLocationViewModel.PickupAddress.Loading ? ViewStates.Visible : ViewStates.Gone;
});
this.SetBinding(
() => ViewModel.TripLocationViewModel.PickupAddress.FormattedAddress,
() => _pickupAddressEditText.Text);
this.SetBinding(() => ViewModel.TripLocationViewModel.CanRequest)
.WhenSourceChanges(() =>
{
if (ViewModel.TripLocationViewModel.CanRequest)
{
SlideUp(_requestView);
_whereToGoButton.Visibility = ViewStates.Gone;
}
else
{
SlideDown(_requestView);
_whereToGoButton.Visibility = ViewStates.Visible;
}
});
await ViewModel.Load();
}