Offline routing

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 // Copyright 2022 Esri. // // Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. // You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific // language governing permissions and limitations under the License.  using ArcGIS.Samples.Managers; using Esri.ArcGISRuntime.Geometry; using Esri.ArcGISRuntime.Mapping; using Esri.ArcGISRuntime.Symbology; using Esri.ArcGISRuntime.Tasks.NetworkAnalysis; using Esri.ArcGISRuntime.UI; using System.Reflection;  using Color = System.Drawing.Color;  namespace ArcGIS.Samples.OfflineRouting {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "Offline routing",  category: "Network analysis",  description: "Solve a route on-the-fly using offline data.",  instructions: "Tap near a road to start adding a stop to the route, tap again to place it on the map. A number graphic will show its order in the route. After adding at least 2 stops, a route will display. Choose \"Fastest\" or \"Shortest\" to control how the route is optimized. The route will update on-the-fly while moving stops. The green box marks the boundary of the routable area provided by the offline data. This sample limits routes to 5 stops for performance reasons.",  tags: new[] { "connectivity", "disconnected", "fastest", "locator", "navigation", "network analysis", "offline", "routing", "shortest", "turn-by-turn" })]  [ArcGIS.Samples.Shared.Attributes.OfflineData("df193653ed39449195af0c9725701dca")]  public partial class OfflineRouting : ContentPage  {  // Graphics overlays for holding graphics.  private GraphicsOverlay _stopsOverlay;  private GraphicsOverlay _routeOverlay;   // Route task and parameters.  private RouteTask _offlineRouteTask;  private RouteParameters _offlineRouteParameters;   // List of travel modes, like 'Fastest' and 'Shortest'.  private List<TravelMode> _availableTravelModes;   // The area covered by the geodatabase used for offline routing.  private readonly Envelope _routableArea = new Envelope(new MapPoint(-13045352.223196, 3864910.900750, 0, SpatialReferences.WebMercator),  new MapPoint(-13024588.857198, 3838880.505604, 0, SpatialReferences.WebMercator));   public OfflineRouting()  {  InitializeComponent();  _ = Initialize();  }   private async Task Initialize()  {  try  {  // Get the paths to resources used by the sample.  string basemapTilePath = DataManager.GetDataFolder("df193653ed39449195af0c9725701dca", "streetmap_SD.tpkx");  string networkGeodatabasePath = DataManager.GetDataFolder("df193653ed39449195af0c9725701dca", "sandiego.geodatabase");   // Create the tile cache representing the offline basemap.  TileCache tiledBasemapCache = new TileCache(basemapTilePath);   // Create a tiled layer to display the offline tiles.  ArcGISTiledLayer offlineTiledLayer = new ArcGISTiledLayer(tiledBasemapCache);   // Create a basemap based on the tile layer.  Basemap offlineBasemap = new Basemap(offlineTiledLayer);   // Create a new map with the offline basemap.  Map theMap = new Map(offlineBasemap);   // Set the initial viewpoint to show the routable area.  theMap.InitialViewpoint = new Viewpoint(_routableArea);   // Show the map in the map view.  MyMapView.Map = theMap;   // Create overlays for displaying the stops and the calculated route.  _stopsOverlay = new GraphicsOverlay();  _routeOverlay = new GraphicsOverlay();   // Create a symbol and renderer for symbolizing the calculated route.  SimpleLineSymbol routeSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.Blue, 2);  _routeOverlay.Renderer = new SimpleRenderer(routeSymbol);   // Add the stops and route overlays to the map.  MyMapView.GraphicsOverlays.Add(_stopsOverlay);  MyMapView.GraphicsOverlays.Add(_routeOverlay);   // Create the route task, referring to the offline geodatabase with the street network.  _offlineRouteTask = await RouteTask.CreateAsync(networkGeodatabasePath, "Streets_ND");   // Get the list of available travel modes.  _availableTravelModes = _offlineRouteTask.RouteTaskInfo.TravelModes.ToList();   // Update the UI with the travel modes list.  TravelModesPicker.ItemsSource = _availableTravelModes.ToList();  TravelModesPicker.SelectedIndex = 0;   // Create the default parameters.  _offlineRouteParameters = await _offlineRouteTask.CreateDefaultParametersAsync();   // Display the extent of the road network on the map.  DisplayBoundaryMarker();   // Now that the sample is ready, hook up the tap event.  MyMapView.GeoViewTapped += MapView_Tapped;  TravelModesPicker.SelectedIndexChanged += TravelMode_SelectionChanged;  }  catch (Exception e)  {  System.Diagnostics.Debug.WriteLine(e);  ShowMessage("Couldn't start sample", "There was a problem starting the sample. See debug output for details.");  }  }   private void DisplayBoundaryMarker()  {  // Displaying the boundary marker helps avoid choosing a non-routable destination.  SimpleLineSymbol boundarySymbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Dash, Color.LawnGreen, 5);  Graphic boundary = new Graphic(_routableArea, boundarySymbol);  GraphicsOverlay boundaryOverlay = new GraphicsOverlay();  boundaryOverlay.Graphics.Add(boundary);  MyMapView.GraphicsOverlays.Add(boundaryOverlay);  }   private void ResetRoute()  {  _routeOverlay.Graphics.Clear();  _stopsOverlay.Graphics.Clear();  }   private async Task UpdateRoute(TravelMode selectedTravelMode)  {  try  {  // Create a list of stops.  List<Stop> stops = new List<Stop>();   // Add a stop to the list for each graphic in the stops overlay.  foreach (Graphic stopGraphic in _stopsOverlay.Graphics)  {  Stop stop = new Stop((MapPoint)stopGraphic.Geometry);  stops.Add(stop);  }   if (stops.Count < 2)  {  // Don't route, there's no where to go (and the route task would throw an exception).  return;  }   // Configure the route parameters with the list of stops.  _offlineRouteParameters.SetStops(stops);   // Configure the travel mode.  _offlineRouteParameters.TravelMode = selectedTravelMode;   // Solve the route.  RouteResult offlineRouteResult = await _offlineRouteTask.SolveRouteAsync(_offlineRouteParameters);   // Clear the old route result.  _routeOverlay.Graphics.Clear();   // Get the geometry from the route result.  Polyline routeGeometry = offlineRouteResult.Routes.First().RouteGeometry;   // Note: symbology left out here because the symbology was set once on the graphics overlay.  Graphic routeGraphic = new Graphic(routeGeometry);   // Display the route.  _routeOverlay.Graphics.Add(routeGraphic);  }  catch (Exception e)  {  System.Diagnostics.Debug.WriteLine(e);  ShowMessage("Couldn't update route", "There was an error updating the route. See debug output for details.");  }  }   private async Task AddStop(Point tappedPosition)  {  try  {  // Get the location on the map.  MapPoint tappedLocation = MyMapView.ScreenToLocation(tappedPosition);   // Name the stop by its number.  string stopName = $"{_stopsOverlay.Graphics.Count + 1}";   // Create a pushpin marker for the stop.  PictureMarkerSymbol pushpinMarker = await GetPictureMarker();   // Create the text symbol for labeling the stop.  TextSymbol stopSymbol = new TextSymbol(stopName, Color.White, 15,  Esri.ArcGISRuntime.Symbology.HorizontalAlignment.Center, Esri.ArcGISRuntime.Symbology.VerticalAlignment.Middle);  stopSymbol.OffsetY = 15;   // Create a combined symbol with the pushpin and the label.  CompositeSymbol combinedSymbol = new CompositeSymbol(new MarkerSymbol[] { pushpinMarker, stopSymbol });   // Create the graphic from the geometry and the symbology.  Graphic newStopGraphic = new Graphic(tappedLocation, combinedSymbol);   // Add the stop to the overlay.  _stopsOverlay.Graphics.Add(newStopGraphic);  }  catch (Exception e)  {  System.Diagnostics.Debug.WriteLine(e);  ShowMessage("Couldn't add stop", "Couldn't add stop. See debug output for details.");  }  }   private async Task<PictureMarkerSymbol> GetPictureMarker()  {  // Get current assembly that contains the image.  Assembly currentAssembly = Assembly.GetExecutingAssembly();   // Get image as a stream from the resources.  // Picture is defined as EmbeddedResource and DoNotCopy.  Stream resourceStream = currentAssembly.GetManifestResourceStream(  "ArcGIS.Resources.PictureMarkerSymbols.pin_blue.png");   // Create new symbol using asynchronous factory method from stream.  PictureMarkerSymbol pinSymbol = await PictureMarkerSymbol.CreateAsync(resourceStream);  pinSymbol.Width = 50;  pinSymbol.Height = 50;  pinSymbol.LeaderOffsetX = 30;  pinSymbol.OffsetY = 14;   return pinSymbol;  }   private void ResetButton_Click(object sender, EventArgs e) => ResetRoute();   private void MapView_Tapped(object sender, Esri.ArcGISRuntime.Maui.GeoViewInputEventArgs e)  {  // Make sure the user isn't adding too many stops.  if (_stopsOverlay.Graphics.Count >= 5)  {  ShowMessage("Can't add stop.", "Sample limits to 5 stops per route.");  return;  }   // Make sure the stop is valid before proceeding.  if (!_routableArea.Contains(e.Location))  {  ShowMessage("Can't add stop.", "That location is outside of the area where offline routing data is available.");  return;  }   // Add the stop for the tapped position.  _ = AddStop(e.Position);   // Update the route with the final list of stops.  _ = UpdateRoute((TravelMode)TravelModesPicker.SelectedItem);  }   private void ShowMessage(string title, string detail)  {  Application.Current.Windows[0].Page.DisplayAlert(title, detail, "OK");  }   private void TravelMode_SelectionChanged(object sender, EventArgs e)  {  try  {  // Enforce selection to prevent errors.  if (TravelModesPicker.SelectedItem == null)  {  TravelModesPicker.SelectedItem = _availableTravelModes.First();  }   // Update the route.  _ = UpdateRoute((TravelMode)TravelModesPicker.SelectedItem);  }  catch (Exception ex)  {  System.Diagnostics.Debug.WriteLine(ex);  ShowMessage("Couldn't change travel mode", "Couldn't change travel mode. See debug output for details.");  }  }  } }