public AddGeofenceViewModel(IGeofenceManager geofences,
IUserDialogs dialogs,
IViewModelManager viewModelMgr,
IGeolocator geolocator)
{
this.Add = ReactiveCommand.CreateAsyncTask(
this.WhenAny(
x => x.RadiusMeters,
x => x.Latitude,
x => x.Longitude,
x => x.Identifer,
(radius, lat, lng, id) =>
{
if (radius.Value < 100)
return false;
if (lat.Value < -90 || lat.Value > 90)
return false;
if (lng.Value < -180 || lng.Value > 180)
return false;
if (id.Value.IsEmpty())
return false;
return true;
}
),
async x =>
{
geofences.StartMonitoring(new GeofenceRegion
{
Identifier = this.Identifer,
Center = new Position(this.Latitude, this.Longitude),
Radius = Distance.FromMeters(this.RadiusMeters)
});
await viewModelMgr.PopNav();
}
);
this.UseCurrentLocation = ReactiveCommand.CreateAsyncTask(async x =>
{
try
{
var current = await geolocator.GetPositionAsync(5000);
this.Latitude = current.Latitude;
this.Longitude = current.Longitude;
}
catch
{
}
});
}