private void MyMapView_MouseMove(object sender, MouseEventArgs e)
{
try
{
// Convert screen point to map point
var point = MyMapView.ScreenToLocation(e.GetPosition(MyMapView));
if (point == null)
{
return;
}
var buffer = GeometryEngine.GeodesicBuffer(
GeometryEngine.NormalizeCentralMeridian(point), //Normalize in case we we're too far west/east of the world bounds
500, LinearUnits.Miles);
Graphic bufferGraphic = null;
if (_graphicsOverlay.Graphics.Count == 0)
{
bufferGraphic = new Graphic {
Geometry = buffer, Symbol = _bufferSymbol
};
_graphicsOverlay.Graphics.Add(bufferGraphic);
}
else
{
bufferGraphic = _graphicsOverlay.Graphics[0];
}
bufferGraphic.Geometry = buffer;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Geometry Engine Failed!");
}
}
private void MyMapView_MapViewTapped(object sender, MapViewInputEventArgs e)
{
try
{
_graphicsOverlay.Graphics.Clear();
var point = e.Location;
var buffer = GeometryEngine.GeodesicBuffer(
GeometryEngine.NormalizeCentralMeridian(point), //Normalize in case we we're too far west/east of the world bounds
500, LinearUnits.Miles);
var pointGraphic = new Graphic {
Geometry = point, Symbol = _pinSymbol
};
_graphicsOverlay.Graphics.Add(pointGraphic);
var bufferGraphic = new Graphic {
Geometry = buffer, Symbol = _bufferSymbol
};
_graphicsOverlay.Graphics.Add(bufferGraphic);
}
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
//When location changes, push this location to the route datasource
private void LocationDisplay_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
if (e.PropertyName == "CurrentLocation")
{
if (LocationDisplay.CurrentLocation != null && !LocationDisplay.CurrentLocation.Location.IsEmpty)
{
if (Route != null)
{
Route.SetCurrentLocation(LocationDisplay.CurrentLocation.Location);
}
if (firstLocation)
{
var accuracy = double.IsNaN(LocationDisplay.CurrentLocation.HorizontalAccuracy) ? 0 :
LocationDisplay.CurrentLocation.HorizontalAccuracy;
ExtentRequested = GeometryEngine.GeodesicBuffer(LocationDisplay.CurrentLocation.Location,
accuracy + 500, LinearUnits.Meters).Extent;
firstLocation = false;
if (Route == null && m_routeTaskCancellationToken == null && !string.IsNullOrWhiteSpace(RouteToAddress)) //calculate route now
//Calculate a route from the address
{
GenerateRoute(RouteToAddress);
}
}
}
}
}
private async void GenerateGeodesicBuffer_Click(object sender, RoutedEventArgs e)
{
string message = null;
try
{
GraphicsLayer inputGraphicsLayer = null;
var drawShape = (DrawShape)DrawShapes.SelectedItem;
inputGraphicsLayer = drawShape == DrawShape.Point ? mapView1.Map.Layers["PointInputLayer"] as GraphicsLayer :
((drawShape == DrawShape.Polyline) ? mapView1.Map.Layers["LineInputLayer"] as GraphicsLayer : mapView1.Map.Layers["PolygonInputLayer"] as GraphicsLayer);
if (inputGraphicsLayer.Graphics.Count == 0)
{
throw new Exception("No input shape. Please draw shape to generate buffer");
}
Esri.ArcGISRuntime.Geometry.Geometry geom = inputGraphicsLayer.Graphics.FirstOrDefault().Geometry;
if (geom != null)
{
string json = geom.ToJson();
var buffer = GeometryEngine.GeodesicBuffer(geom, 10, LinearUnits.Meters);
if (buffer != null)
{
GraphicsLayer resultGraphicsLayer = mapView1.Map.Layers["GeometryResultGraphicsLayer"] as GraphicsLayer;
resultGraphicsLayer.Graphics.Add(new Graphic()
{
Geometry = buffer
});
mapView1.SetView(resultGraphicsLayer.Graphics.First().Geometry.Extent);
}
}
}
catch (Exception ex)
{
message = ex.Message;
}
if (message != null)
{
await new MessageDialog(message).ShowAsync();
}
}
private void LocationButton_Checked(object sender, RoutedEventArgs e)
{
_myLocationOverlay.Graphics.Clear();
var point = MyMapView.LocationDisplay.CurrentLocation.Location;
var buffer = GeometryEngine.GeodesicBuffer(point, 300, LinearUnits.Meters);
MyMapView.SetView(buffer.Extent);
var symbol = new PictureMarkerSymbol()
{
Width = 48, Height = 48, YOffset = 24
};
symbol.SetSourceAsync(new Uri("ms-appx:///Assets/CollPin.png"));
var graphic = new Graphic()
{
Geometry = point,
Symbol = symbol
};
_myLocationOverlay.Graphics.Add(graphic);
}
