private async void Cluster()
{
try
{
if (_map != null && _items != null && _items.Count > 0 && _currentZoomLevel <= _maxZoomLevel)
{
#if WINDOWS_APP
var pixels = new List <Windows.Foundation.Point>();
_map.TryLocationsToPixels(_allLocations, pixels);
Windows.Foundation.Point centerPixel;
_map.TryLocationToPixel(new Location(0, 0), out centerPixel);
#elif WPF
var pixels = new List <System.Windows.Point>(_allLocations.Count);
foreach (var l in _allLocations)
{
pixels.Add(_map.LocationToViewportPoint(l));
}
;
System.Windows.Point centerPixel;
centerPixel = _map.LocationToViewportPoint(new Location(0, 0));
#elif WINDOWS_PHONE_APP
var pixels = new List <Windows.Foundation.Point>(_allLocations.Count);
Windows.Foundation.Point p;
foreach (var l in _allLocations)
{
_map.GetOffsetFromLocation(l, out p);
pixels.Add(p);
}
Windows.Foundation.Point centerPixel;
_map.GetOffsetFromLocation(new Geopoint(new BasicGeoposition()
{
Latitude = 0, Longitude = 0
}), out centerPixel);
#elif WINDOWS_PHONE
var pixels = new List <System.Windows.Point>(_allLocations.Count);
foreach (var l in _allLocations)
{
pixels.Add(_map.ConvertGeoCoordinateToViewportPoint(l));
}
;
System.Windows.Point centerPixel;
centerPixel = _map.ConvertGeoCoordinateToViewportPoint(new GeoCoordinate(0, 0));
#endif
switch (ClusterType)
{
case ClusteringType.Grid:
await CalculateGridClusters(pixels, centerPixel);
break;
case ClusteringType.Point:
await CalculatePointClusters(pixels);
break;
default:
break;
}
}
Render();
}
catch { }
}
public void SetUsers()
{
if (!App.ViewModel.IsMapVisible)
{
return;
}
// clean up
if (MapControl.Layers.Count == 0)
{
MapControl.Layers.Add(new MapLayer());
}
var layer = MapControl.Layers.First();
layer.Clear();
//set me
var me = App.ViewModel.Coordinate;
if (me != null)
{
var myColor = ConvertHtmlColor("#123123");
layer.Add(new MapOverlay
{
GeoCoordinate = new GeoCoordinate(me.Lat, me.Lon),
Content = new GeoUser
{
Name = "Me",
Speed = me.SpeedKmh.ToString("N0"),
Fill = new SolidColorBrush(myColor),
Stroke = new SolidColorBrush(MakeDarker(myColor)),
U = "-1",
},
ContentTemplate = this.Resources["MeTemplate"] as DataTemplate,
});
}
// set others
if (App.ViewModel.GroupsModel.Tracks != null)
{
foreach (var user in App.ViewModel.GroupsModel.Tracks)
{
var groupUser = App.ViewModel.GroupsModel.Groups.Where(w => w.Active).SelectMany(s => s.Users).FirstOrDefault(f => f.U == user.Key);
if (groupUser == null)
{
continue;
}
var coordinate = user.Value[user.Value.Count - 1];
var geoCoordinate = new GeoCoordinate(coordinate.Lat, coordinate.Lon);
var point = MapControl.ConvertGeoCoordinateToViewportPoint(geoCoordinate);
if (point.X < -100 || point.X > MapControl.RenderSize.Width + 100 || point.Y < -100 || point.Y > MapControl.RenderSize.Height + 100)
{
continue;
}
var color = ConvertHtmlColor(groupUser.Color);
layer.Add(new MapOverlay
{
GeoCoordinate = geoCoordinate,
Content = new GeoUser
{
Name = groupUser.Name,
Speed = coordinate.SpeedKmh.ToString("N0"),
Fill = new SolidColorBrush(color),
Stroke = new SolidColorBrush(MakeDarker(color)),
U = user.Key,
},
ContentTemplate = this.Resources["UserTemplate"] as DataTemplate
});
}
;
}
if (LockedUser != null)
{
var user = layer.FirstOrDefault(f => (f.Content as GeoUser).U == LockedUser);
if (user != null)
{
var xcenter = MapControl.RenderSize.Width / 2;
var ycenter = MapControl.RenderSize.Height / 2;
var point = MapControl.ConvertGeoCoordinateToViewportPoint(user.GeoCoordinate);
var distance = Math.Sqrt(Math.Pow(xcenter - point.X, 2) + Math.Pow(ycenter - point.Y, 2));
if (distance > 50)
{
MapControl.Center = user.GeoCoordinate;
}
}
}
}
private async void Render()
{
try
{
if (_isLoaded && _map != null)
{
StringBuilder sb = new StringBuilder();
if (Locations != null)
{
#if WINDOWS_APP
var px = new List <Windows.Foundation.Point>();
_map.TryLocationsToPixels(Locations, px);
await System.Threading.Tasks.Task.Run(() =>
{
foreach (var p in px)
{
sb.AppendFormat("{0},{1}|", Math.Round(p.X), Math.Round(p.Y));
}
});
#elif WINDOWS_PHONE
foreach (var l in Locations)
{
var p = _map.ConvertGeoCoordinateToViewportPoint(l);
sb.AppendFormat("{0},{1}|", Math.Round(p.X), Math.Round(p.Y));
}
#elif WINDOWS_PHONE_APP
await System.Threading.Tasks.Task.Run(() =>
{
Windows.Foundation.Point p;
foreach (var l in Locations.Positions)
{
_map.GetOffsetFromLocation(new Geopoint(l), out p);
sb.AppendFormat("{0},{1}|", Math.Round(p.X), Math.Round(p.Y));
}
});
#endif
}
if (sb.Length > 0)
{
sb.Remove(sb.Length - 1, 1);
}
//Ground resolution at equator
var groudResolution = (2 * Math.PI * 6378135) / Math.Round(256 * Math.Pow(2, _map.ZoomLevel));
var radiusInPixels = _radius / groudResolution;
if (radiusInPixels < _minRadius)
{
radiusInPixels = _minRadius;
}
string[] args = { sb.ToString(), radiusInPixels.ToString(), _map.ZoomLevel.ToString() };
InvokeJS("Render", args);
}
}
catch { }
}