public MainViewModel()
{
var current = this.geofences.MonitoredRegions.FirstOrDefault();
if (current != null)
{
this.CenterLatitude = current.Center.Latitude;
this.CenterLongitude = current.Center.Longitude;
this.DistanceMeters = current.Radius.TotalMeters;
this.HasGeofence = true;
}
this.StopGeofence = ReactiveCommand.Create(() =>
{
this.geofences.StopAllMonitoring();
this.HasGeofence = false;
},
this.WhenAny(
x => x.HasGeofence,
x => x.Value
));
this.SetGeofence = ReactiveCommand.Create(() =>
{
try
{
this.geofences.StopAllMonitoring();
var radius = Distance.FromMeters(this.DistanceMeters.Value);
var center = new Plugin.Geofencing.Position(this.CenterLatitude.Value, this.CenterLongitude.Value);
this.geofences.StartMonitoring(new GeofenceRegion("plugintest", center, radius));
this.HasGeofence = true;
UserDialogs.Instance.Alert("Geofence set");
}
catch (Exception ex)
{
UserDialogs.Instance.Alert(ex.ToString());
}
},
this.WhenAny(
x => x.CenterLatitude,
x => x.CenterLongitude,
x => x.DistanceMeters,
x => x.HasGeofence,
(latitude, longitude, dist, hasGeo) =>
latitude.Value > -90 &&
latitude.Value <90 &&
longitude.Value> -180 &&
longitude.Value < 180 &&
dist.Value > 0 &&
dist.Value < 3000 &&
!hasGeo.Value
));
//this.WhenAny(
// x => x.CenterLatitude,
// x => x.CenterLongitude,
// x => x.DistanceMeters,
// x => x.HasGeofence,
// (latitude, longitude, dist, hasGeo) =>
// latitude.Value > -180 &&
// latitude.Value < 180 &&
// longitude.Value > -90 &&
// longitude.Value < 90 &&
// dist.Value > 0 &&
// dist.Value < 3000 &&
// !hasGeo.Value
// )
// .Subscribe(x =>
// {
// var msg = $"LAT: {this.CenterLatitude} - LNG: {this.CenterLongitude} - D: {this.DistanceMeters} - HG: {this.HasGeofence}";
// UserDialogs.Instance.Alert(msg);
// });
this.RequestStatus = ReactiveCommand.CreateFromTask(async ct =>
{
var region = this.geofences.MonitoredRegions.First();
var result = await this.geofences.RequestState(region, ct).ConfigureAwait(false);
UserDialogs.Instance.Alert("Geofence Status: " + result.ToString(), "Status");
},
this.WhenAny(
x => x.HasGeofence,
x => x.Value
));
this.UseCurrentGps = ReactiveCommand.CreateFromTask(async ct =>
{
try
{
var pos = await this.gps.GetPositionAsync(token: ct).ConfigureAwait(false);
if (pos != null)
{
Device.BeginInvokeOnMainThread(() =>
{
this.CenterLatitude = pos.Latitude;
this.CenterLongitude = pos.Longitude;
});
}
}
catch (Exception ex)
{
UserDialogs.Instance.Alert("Error getting current location - " + ex);
}
});
}
