Mobile map (search and route)

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
// Copyright 2019 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.Geocoding;
using Esri.ArcGISRuntime.Tasks.NetworkAnalysis;
using Esri.ArcGISRuntime.UI;
using Esri.ArcGISRuntime.UI.Controls;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;

namespace ArcGIS.WPF.Samples.MobileMapSearchAndRoute
{
    [ArcGIS.Samples.Shared.Attributes.Sample(
        name: "Mobile map (search and route)",
        category: "Map",
        description: "Display maps and use locators to enable search and routing offline using a Mobile Map Package.",
        instructions: "A list of maps from a mobile map package will be displayed. If the map contains transportation networks, the list item will have a navigation icon. Click on a map in the list to open it. If a locator task is available, click on the map to reverse geocode the location's address. If transportation networks are available, a route will be calculated between geocode locations.",
        tags: new[] { "disconnected", "field mobility", "geocode", "network", "network analysis", "offline", "routing", "search", "transportation" })]
    [ArcGIS.Samples.Shared.Attributes.OfflineData("260eb6535c824209964cf281766ebe43")]
    [ArcGIS.Samples.Shared.Attributes.ClassFile("Converters\\ItemToImageSourceConverter.cs", "Converters\\NullToVisibilityConverter.cs")]
    public partial class MobileMapSearchAndRoute
    {
        // Hold references to map resources for easy access.
        public ObservableCollection<Map> Maps { get; set; }

        private LocatorTask _packageLocator;
        private TransportationNetworkDataset _networkDataset;

        // Overlays for use in visualizing routes.
        private GraphicsOverlay _routeOverlay;
        private GraphicsOverlay _waypointOverlay;

        // Track the start and end point for route calculation.
        private MapPoint _startPoint;
        private MapPoint _endPoint;

        public MobileMapSearchAndRoute()
        {
            Maps = new ObservableCollection<Map>();
            InitializeComponent();
            DataContext = this;
            _ = Initialize();
        }

        private async Task Initialize()
        {
            // Get the path to the package on disk.
            string filePath = DataManager.GetDataFolder("260eb6535c824209964cf281766ebe43", "SanFrancisco.mmpk");

            // Open the map package.
            MobileMapPackage package = await OpenMobileMapPackage(filePath);

            // Populate the list of maps.
            foreach (Map map in package.Maps)
            {
                await map.LoadAsync();
                Maps.Add(map);
            }

            // Get the locator task from the package.
            _packageLocator = package.LocatorTask;

            // Create and add an overlay for showing a route.
            _routeOverlay = new GraphicsOverlay();
            _routeOverlay.Renderer = new SimpleRenderer
            {
                Symbol = new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, System.Drawing.Color.Blue, 3)
            };
            MyMapView.GraphicsOverlays.Add(_routeOverlay);

            // Create and add an overlay for showing waypoints/stops.
            _waypointOverlay = new GraphicsOverlay();
            MyMapView.GraphicsOverlays.Add(_waypointOverlay);

            // Enable tap-to-reverse geocode and tap-to-route.
            MyMapView.GeoViewTapped += MapView_Tapped;
        }

        private async Task<MobileMapPackage> OpenMobileMapPackage(string path)
        {
            // Open the package.
            MobileMapPackage package = await MobileMapPackage.OpenAsync(path);

            // Load the package.
            await package.LoadAsync();

            // Return the opened package.
            return package;
        }

        private async void MapView_Tapped(object sender, GeoViewInputEventArgs e)
        {
            // Handle routing.
            try
            {
                await ProcessRouteRequest(e.Location);
            }
            catch (Exception exception)
            {
                Console.WriteLine(exception);
                MessageBox.Show("Couldn't geocode or route.", "Error");
            }
        }

        private async Task ShowGeocodeResult(MapPoint tappedPoint)
        {
            // Reverse geocode to get an address.
            IReadOnlyList<GeocodeResult> results = await _packageLocator.ReverseGeocodeAsync(tappedPoint);

            // Process the address into usable strings.
            string address = results.First().Label;

            // Show the address in a callout.
            MyMapView.ShowCalloutAt(tappedPoint, new CalloutDefinition(address));
        }

        private async Task ProcessRouteRequest(MapPoint tappedPoint)
        {
            // Clear any existing overlays.
            _routeOverlay.Graphics.Clear();
            MyMapView.DismissCallout();

            // Return if there is no network available for routing.
            if (_networkDataset == null)
            {
                await ShowGeocodeResult(tappedPoint);
                return;
            }

            // Set the start point if it hasn't been set.
            if (_startPoint == null)
            {
                _startPoint = tappedPoint;

                await ShowGeocodeResult(tappedPoint);

                // Show the start point.
                _waypointOverlay.Graphics.Add(await GraphicForPoint(_startPoint));

                return;
            }

            if (_endPoint == null)
            {
                await ShowGeocodeResult(tappedPoint);

                // Show the end point.
                _endPoint = tappedPoint;
                _waypointOverlay.Graphics.Add(await GraphicForPoint(_endPoint));

                // Create the route task from the local network dataset.
                RouteTask routingTask = await RouteTask.CreateAsync(_networkDataset);

                // Configure route parameters for the route between the two tapped points.
                RouteParameters routingParameters = await routingTask.CreateDefaultParametersAsync();
                List<Stop> stops = new List<Stop> { new Stop(_startPoint), new Stop(_endPoint) };
                routingParameters.SetStops(stops);

                // Get the first route result.
                RouteResult result = await routingTask.SolveRouteAsync(routingParameters);
                Route firstRoute = result.Routes.First();

                // Show the route on the map. Note that symbology for the graphics overlay is defined in Initialize().
                Polyline routeLine = firstRoute.RouteGeometry;
                _routeOverlay.Graphics.Add(new Graphic(routeLine));

                return;
            }

            // Reset graphics and route.
            _routeOverlay.Graphics.Clear();
            _waypointOverlay.Graphics.Clear();
            _startPoint = null;
            _endPoint = null;
        }

        private void Map_Selected(object sender, SelectionChangedEventArgs e)
        {
            // Clear existing overlays.
            MyMapView.DismissCallout();
            _waypointOverlay.Graphics.Clear();
            _routeOverlay.Graphics.Clear();

            try
            {
                // Get the selected map.
                Map selectedMap = e.AddedItems[0] as Map;

                // Show the map in the view.
                MyMapView.Map = selectedMap;

                // Get the transportation network if there is one. Will be set to null otherwise.
                _networkDataset = selectedMap.TransportationNetworks.FirstOrDefault();
            }
            catch (Exception exception)
            {
                Console.WriteLine(exception);
                MessageBox.Show(exception.ToString());
            }
        }

        private async Task<Graphic> GraphicForPoint(MapPoint point)
        {
            // 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_star_blue.png");

            // Create new symbol using asynchronous factory method from stream.
            PictureMarkerSymbol pinSymbol = await PictureMarkerSymbol.CreateAsync(resourceStream);
            pinSymbol.Width = 60;
            pinSymbol.Height = 60;
            // The image is a pin; offset the image so that the pinpoint
            //     is on the point rather than the image's true center.
            pinSymbol.LeaderOffsetX = 30;
            pinSymbol.OffsetY = 14;
            return new Graphic(point, pinSymbol);
        }
    }
}