/// <summary>
/// Update the displayed route. Route calculation is done in the background thread.
/// </summary>
private void UpdateRoute()
{
var id = osmMap.DetailsRoute.Id;
ThreadPool.QueueUserWorkItem(state => {
var geoPoints = new List <CLLocationCoordinate2D> ();
if (osmMap.GpsLocation != null)
{
geoPoints.Add(new CLLocationCoordinate2D(osmMap.GpsLocation.Latitude, osmMap.GpsLocation.Longitude));
}
Action action;
try
{
var locations = routeCalculator.CreateOrderedRoute(id, osmMap.GpsLocation);
/*foreach (var w in locations)
* {
* var point = new CLLocationCoordinate2D(w.Latitude, w.Longitude);
* geoPoints.Add(point);
* }*/
action = () => DrawRoute(locations, osmMap.GpsLocation != null);
}
catch (Exception)
{
action = () => { };
}
Device.BeginInvokeOnMainThread(() => { action.Invoke(); });
});
}
/// <summary>
/// Calculates the navigation route in a seperate thread
/// and throws error message if no route was found
/// </summary>
/// <param name="userPosition">position of the user</param>
private void CalculateRoute(GeoLocation?userPosition)
{
var id = osmMap.DetailsRoute.Id;
ThreadPool.QueueUserWorkItem(state =>
{
Action action;
try
{
var locations = routeCalculator.CreateOrderedRoute(id, userPosition);
/*foreach (var w in locations)
* {
* var point = new GeoPoint (w.Latitude, w.Longitude);
* geoPoints.Add (point);
* }*/
action = () => DrawRoute(locations, userPosition != null);
}
catch (Exception)
{
action = () => { };
}
activity.RunOnUiThread(() =>
{
var handler = new Handler();
handler.PostDelayed(action, 0);
});
});
}
