public QueryTourisViewModel(ITouristPoints serviceAgent)
{
IsEnabled = false;
this.serviceAgent = serviceAgent;
Task.Run((async() =>
{
TouristCollection = await serviceAgent.GetTouristsLocations();
AllTouristCollection = new List <Tourist>(touristCollection);
IsEnabled = true;
}));
}
private async void CreateGraphics()
{
TouristsList = await touristAgent.GetTouristsLocations();
double xMin = 999;
double yMin = 999;
double xMax = 0;
double yMax = 0;
for (var n = 0; n < TouristsList.Count; ++n)
{
var item = TouristsList[n];
var symbol = (touristAgent as IRenderGraphic).CreatSymbol <PictureMarkerSymbol>(new Uri(Global.LocalMarkerUrl));
var graphic = (touristAgent as IRenderGraphic).CreateGraphic(n, symbol, item);
double x = (double)item.Point.longitude;
double y = (double)item.Point.latitude;
if (x < xMin)
{
xMin = x;
}
else if (x > xMax)
{
xMax = x;
}
if (y < yMin)
{
yMin = y;
}
else if (y > yMax)
{
yMax = y;
}
_graphicsLayer.Graphics.Add(graphic);
}
var minPoint = new MapPoint(xMin, yMin, SpatialReferences.Wgs84);
var maxPoint = new MapPoint(xMax, yMax, SpatialReferences.Wgs84);
Envelope envelope = new Envelope(minPoint, maxPoint);//xMin, yMin, xMax, yMax
//var currentViewpoint = MyMapView.GetCurrentViewpoint(ViewpointType.BoundingGeometry);
//var viewpointExtent = currentViewpoint.TargetGeometry.Extent;
await MyMapView.SetViewAsync(envelope.Expand(1.10));
}