public override void ViewDidLoad()
{
base.ViewDidLoad ();
_loadDataButton = UIButton.FromType(UIButtonType.RoundedRect);
_loadDataButton.SetTitle("Hent sanntidsdata", UIControlState.Normal);
_loadDataButton.Frame = new RectangleF(10, 10, View.Bounds.Width - 20, 50);
_result = new UITextView(new RectangleF(10, 70, View.Bounds.Width - 20, View.Bounds.Height - 80));
_result.Font = UIFont.FromName("Arial", 14);
_result.Editable = false;
_activityIndicator = new UIActivityIndicatorView(new RectangleF(View.Bounds.Width / 2 - 20, View.Bounds.Height / 2 - 20, 40, 40));
_activityIndicator.AutoresizingMask = UIViewAutoresizing.FlexibleBottomMargin | UIViewAutoresizing.FlexibleTopMargin | UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleRightMargin;
_activityIndicator.ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.WhiteLarge;
View.AddSubview(_activityIndicator);
View.AddSubview(_loadDataButton);
View.AddSubview(_result);
View.BackgroundColor = UIColor.DarkGray;
_loadDataButton.TouchUpInside += delegate(object sender, EventArgs e) {
if(_location != null)
{
_activityIndicator.StartAnimating();
_result.Text = "Jobber..." + Environment.NewLine + Environment.NewLine;
var coordinate = new GeographicCoordinate(_location.Latitude, _location.Longtitude);
ThreadPool.QueueUserWorkItem(o => _sanntid.GetNearbyStops(coordinate, BusStopsLoaded));
}
};
_gpsService.LocationChanged = location => _location = location;
_gpsService.Start();
}
public BusStop(string id, string stopCode, string name, GeographicCoordinate location)
{
Id = id;
StopCode = stopCode;
Name = name;
Location = location;
}
public void GetNearbyStops(GeographicCoordinate location, Action<List<BusStop>> callback)
{
GetBusStopList(stops =>
{
var nearbyStops = stops
.OrderBy(s => RelativeDistance(s.Location, location))
.Take(NumNearbyStops)
.ToList();
callback(nearbyStops);
});
}
private static double RelativeDistance(GeographicCoordinate c1, GeographicCoordinate c2)
{
if (c1 == null || c2 == null)
{
return double.MaxValue;
}
var dlat = c1.Latitude - c2.Latitude;
var dlon = c1.Longtitude - c2.Longtitude;
return Math.Sqrt(dlat * dlat + dlon * dlon);
}
public BusStop()
{
Location = new GeographicCoordinate(0,0);
}
/*
* LatLonToUTMXY
*
* Converts a latitude/longitude pair to x and y coordinates in the
* Universal Transverse Mercator projection.
*
* Inputs:
* lat - Latitude of the point, in radians.
* lon - Longitude of the point, in radians.
* zone - UTM zone to be used for calculating values for x and y.
* If zone is less than 1 or greater than 60, the routine
* will determine the appropriate zone from the value of lon.
*
* Outputs:
* xy - A 2-element array where the UTM x and y values will be stored.
*
* Returns:
* The UTM zone used for calculating the values of x and y.
*
*/
public CartecianCoordinate LatLonToUtmXy(GeographicCoordinate latLon, int zone)
{
var coordinate = MapLatLonToXy(latLon.Latitude, latLon.Longtitude, UtmCentralMeridian(zone));
/* Adjust easting and northing for UTM system. */
var x = coordinate.X * UTMScaleFactor + 500000.0;
var y = coordinate.Y * UTMScaleFactor;
if (y < 0.0)
y += 10000000.0;
return new CartecianCoordinate(x,y);
}