public void Start()
{
if (_geo == null)
{
// Load last knowns.
if (_cache.Lat.HasValue && _cache.Long.HasValue)
{
LastKnownLocation = new Location
{
Latitude = _cache.Lat.Value,
Longitude = _cache.Long.Value,
Altitude = 0,
HorizontalAccuracy = double.NaN,
VerticalAccuracy = double.NaN,
};
}
PriorityQueue.AddWorkItem(() =>
{
try
{
_geo = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
_geo.MovementThreshold = 20; // meters
_geo.StatusChanged += OnStatusChanged;
_geo.PositionChanged += OnPositionChanged;
_geo.Start();
}
catch
{
}
});
}
}
private void OnStatusChanged(object sender, GeoPositionStatusChangedEventArgs e)
{
Status = e.Status;
#if GEO_DEBUG
Debug.WriteLine("*******");
Debug.WriteLine("");
Debug.WriteLine("GEO: Status is {0}", _status);
Debug.WriteLine("");
#endif
switch (e.Status)
{
case GeoPositionStatus.Initializing:
break;
case GeoPositionStatus.Disabled:
//throw new InvalidOperationException();
break;
case GeoPositionStatus.NoData:
#if DEBUG
if (seattle)
{
double lat = isBoka ? 47.60487905922638 : 47.60643068740198;
double @long = isBoka ? -122.33625054359436 : -122.3319536447525;
Debug.WriteLine("GEO: Using some favorite Seattle coordinates for debug-time emulator work.");
LastKnownLocation = new Location
{
Latitude = lat,
Longitude = @long,
VerticalAccuracy = double.NaN,
HorizontalAccuracy = 350,
Altitude = 0,
};
}
else
{
if (isWorldwide)
{
Debug.WriteLine("GEO: Using a worldwide coordinate for debug-time emulator work.");
LastKnownLocation = new Location
{
// sweden
//Latitude = 55.603331,
//Longitude = 13.001303,
// russia
//Latitude = 54.741903,
//Longitude = 20.532171,
// NYC
//Latitude = 40.760838,
//Longitude = -73.983436,
// Shanghai French Concession
//Latitude = 31.209058,
//Longitude = 121.470015,
// Winter Garden, FL
Latitude = 28.564889,
Longitude = -81.587257,
// London, Trafalgar Square
//Latitude = 51.507828,
//Longitude = -0.128628,
VerticalAccuracy = double.NaN,
HorizontalAccuracy = 100,
Altitude = 0,
};
}
else
{
// redmond
Debug.WriteLine("GEO: Using Redmond work coordinates for debug-time emulator work.");
LastKnownLocation = new Location
{
Latitude = 47.6372299194336,
Longitude = -122.133848190308,
VerticalAccuracy = double.NaN,
HorizontalAccuracy = 100,
Altitude = 0,
};
}
}
Status = GeoPositionStatus.Ready;
#endif
break;
case GeoPositionStatus.Ready:
break;
}
var handler = StatusChanged;
if (handler != null)
{
handler(this, e);
}
}
