protected async override void OnNavigatedTo(NavigationEventArgs e)
{
string hubId;
if (App.Hub == null && NavigationContext.QueryString.TryGetValue("hubId", out hubId))
{
if (!await MainPage.GetCredentials())
{
NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
return;
}
var mockHub = new Hub { Id = int.Parse(hubId) };
App.Hub = new HubViewModel(await mockHub.Get());
}
this.DataContext = App.Hub;
await App.MobileServiceClient.GetPush().RegisterNativeAsync(App.CurrentChannel.ChannelUri.ToString(), new string[] { App.Hub.Id.ToString() });
App.CurrentChannel.ChannelUriUpdated += OnNotificationChannelEvent;
App.CurrentChannel.ShellToastNotificationReceived += QueryPosts;
App.Geolocator.PositionChanged += OnPositionChanged;
await App.Hub.Source.Join();
this.isInRange = true;
QueryPosts(this, null);
base.OnNavigatedTo(e);
}
public void OnLocationChanged(Location location)
{
var referenceHub = new Hub
{
Lat = location.Latitude,
Lng = location.Longitude,
Radius = 1 * 1000
};
this.hubAdapter.RefreshHubs(referenceHub, 5);
}
public PostAdapter(Activity activity, Hub hub)
{
this.activity = activity;
this.posts = new List<Post>();
this.hub = hub;
timer = new Timer();
timer.Interval = 2000;
timer.Elapsed += OnTimedEvent;
timer.Start();
}
public async void RefreshHubs(Hub reference, int quantity)
{
progress.Visibility = ViewStates.Visible;
List<Hub> nearHubs = await reference.NearHubs(quantity);
this.hubs.Clear();
this.hubs.AddRange(nearHubs);
progress.Visibility = ViewStates.Gone;
this.NotifyDataSetChanged();
}
private void OnPositionChanged(Geolocator sender, PositionChangedEventArgs e)
{
var geoCoordinate = new GeoCoordinate(e.Position.Coordinate.Latitude, e.Position.Coordinate.Longitude);
var accuracy = e.Position.Coordinate.Accuracy;
Dispatcher.BeginInvoke(async () =>
{
pbLoading.Visibility = Visibility.Visible;
mLocation.SetView(geoCoordinate, App.MAP_ZOOM);
RefreshPin(geoCoordinate, accuracy);
var mockHub = new Hub
{
Lat = geoCoordinate.Latitude,
Lng = geoCoordinate.Longitude
};
IList<HubViewModel> nearHubs = Enumerable.Empty<HubViewModel>().ToList();
try
{
nearHubs = (await mockHub.NearHubs(App.HUBS_IN_PROXIMITY, accuracy))
.Select(nh => new HubViewModel(nh))
.ToList();
}
catch
{
MessageBox.Show("There was an error downloading the list of hubs. Please try again.", "error", MessageBoxButton.OK);
}
RefreshHubs(nearHubs);
pbLoading.Visibility = Visibility.Collapsed;
});
}