// 鹰眼
private void myMapView_ViewpointChanged(object sender, EventArgs e)
{
// 声明鹰眼地图的覆盖层边框
Esri.ArcGISRuntime.Geometry.Geometry eagleViewEnv = null;
// 每次主地图的焦点改变, 都会清空鹰眼地图的覆盖层
myMapView_Eagle.GraphicsOverlays.Clear();
// 获取主地图的四至
Esri.ArcGISRuntime.Geometry.Polygon vExtent = myMapView.VisibleArea;
// 鹰眼地图的覆盖层边框等于主地图四至
eagleViewEnv = vExtent.Extent;
// 鹰眼地图的覆盖层边框为"红色"
System.Drawing.Color lineColor = System.Drawing.Color.FromName("Red");
// 鹰眼地图的覆盖层边框样式
Esri.ArcGISRuntime.Symbology.SimpleLineSymbol lineSymbol = new Esri.ArcGISRuntime.Symbology.SimpleLineSymbol(Esri.ArcGISRuntime.Symbology.SimpleLineSymbolStyle.Dash, lineColor, 2.0);
System.Drawing.Color fillColor = System.Drawing.Color.FromArgb(0, 255, 255, 255);
Esri.ArcGISRuntime.Symbology.SimpleFillSymbol polySymbol = new Esri.ArcGISRuntime.Symbology.SimpleFillSymbol(Esri.ArcGISRuntime.Symbology.SimpleFillSymbolStyle.Solid, fillColor, lineSymbol);
var graphicOverlay = new Esri.ArcGISRuntime.UI.GraphicsOverlay();
// 几何图层
var envGraphic = new Esri.ArcGISRuntime.UI.Graphic(eagleViewEnv, polySymbol);
// 覆盖层
graphicOverlay.Graphics.Add(envGraphic);
// 覆盖层添加到鹰眼地图
myMapView_Eagle.GraphicsOverlays.Add(graphicOverlay);
}
private async void LoadService(string uri)
{
var client = await StreamServiceClient.CreateAsync(new Uri(uri));
client.FeatureTimeout = TimeSpan.FromMinutes(5); // Removes any features that hasn't reported back in over 5 minutes
client.OnUpdate += Client_OnUpdate;
// Create overlay for rendering updates
var si = typeof(LocationDisplay).Assembly.GetManifestResourceStream("Esri.ArcGISRuntime.Esri.ArcGISRuntime.LocationDisplayCourse.scale-200.png");
var ri = await RuntimeImage.FromStreamAsync(si);
PictureMarkerSymbol vehicleSymbol = new PictureMarkerSymbol(ri)
{
Width = 25, Height = 25
};
var overlay = new Esri.ArcGISRuntime.UI.GraphicsOverlay()
{
Renderer = new SimpleRenderer(vehicleSymbol),
SceneProperties = new LayerSceneProperties(SurfacePlacement.Absolute) //In case we use it in 3D and have Z values
};
var headingField = client.ServiceInfo.Fields.Where(f => f.Name.ToLower() == "heading").Select(f => f.Name).FirstOrDefault();
if (!string.IsNullOrEmpty(headingField))
{
overlay.Renderer.RotationExpression = $"[{headingField}]";
overlay.Renderer.SceneProperties.HeadingExpression = $"[{headingField}]";
}
mapView.GraphicsOverlays.Add(overlay);
client.Overlay = overlay;
// Connect
await client.ConnectAsync();
}