Read symbols from mobile style

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 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.Mapping; using Esri.ArcGISRuntime.Symbology; using Esri.ArcGISRuntime.UI; using Esri.ArcGISRuntime.UI.Controls; using System; using System.Collections.Generic; using System.Drawing; using System.Linq; using System.Threading.Tasks; using System.Windows; using WinMedia = System.Windows.Media;  namespace ArcGIS.WPF.Samples.SymbolsFromMobileStyle {  [ArcGIS.Samples.Shared.Attributes.Sample(  name: "Read symbols from mobile style",  category: "Symbology",  description: "Combine multiple symbols from a mobile style file into a single symbol.",  instructions: "Select a symbol and a color from each of the category lists to create an emoji. A preview of the symbol is updated as selections are made. The size of the symbol can be set using the slider. Click the map to create a point graphic using the customized emoji symbol, and click \"Reset\" to clear all graphics from the display.",  tags: new[] { "advanced symbology", "mobile style", "multilayer", "stylx" })]  [ArcGIS.Samples.Shared.Attributes.OfflineData("1bd036f221f54a99abc9e46ff3511cbf")]  [ArcGIS.Samples.Shared.Attributes.ClassFile("Converters\\ColorToSolidBrushConverter.cs")]  public partial class SymbolsFromMobileStyle  {  // A variable for the symbol style object.  private SymbolStyle _emojiStyle;   // The unique identifier (key) for the background face symbol in the mobile style.  private readonly string _baseSymbolKey = "Face1";   public SymbolsFromMobileStyle()  {  InitializeComponent();   // Call a function that will create the map and fill UI controls with symbols in a mobile style.  _ = Initialize();  }   private async Task Initialize()  {  // Create a new topographic basemap and assign it to the map view.  Map map = new Map(BasemapStyle.ArcGISTopographic);  MyMapView.Map = map;   // Create a graphics overlay for showing point graphics and add it to the map view.  GraphicsOverlay overlay = new GraphicsOverlay();  MyMapView.GraphicsOverlays.Add(overlay);   // Fill the symbol color combo box with some color choices.  FaceColorComboBox.Items.Add(Color.Yellow);  FaceColorComboBox.Items.Add(Color.LightGreen);  FaceColorComboBox.Items.Add(Color.LightPink);  FaceColorComboBox.SelectedIndex = 0;   // Get the full path to the downloaded mobile style file (.stylx).  string mobileStyleFilePath = DataManager.GetDataFolder("1bd036f221f54a99abc9e46ff3511cbf", "emoji-mobile.stylx");   // Call a function that will read the mobile style file and populate list boxes with symbol layers.  await ReadMobileStyle(mobileStyleFilePath);   // Handle the tapped event on the map view to draw point graphics with the chosen symbol.  MyMapView.GeoViewTapped += GeoViewTapped;  }   private async Task ReadMobileStyle(string stylePath)  {  try  {  // Open the mobile style file at the provided path.  _emojiStyle = await SymbolStyle.OpenAsync(stylePath);   // Get the default style search parameters.  SymbolStyleSearchParameters searchParams = await _emojiStyle.GetDefaultSearchParametersAsync();   // Search the style with the default parameters to return all symbol results.  IList<SymbolStyleSearchResult> styleResults = await _emojiStyle.SearchSymbolsAsync(searchParams);   // Create an empty placeholder image to represent "no symbol" for each category.  WinMedia.ImageSource emptyImage = WinMedia.Imaging.BitmapSource.Create  (2, 2, 96, 96,  WinMedia.PixelFormats.Indexed1,  new WinMedia.Imaging.BitmapPalette(new List<WinMedia.Color> { WinMedia.Colors.Transparent }),  new byte[4],  1);   // Create lists to contain the available symbol layers for each category of symbol and add an empty entry as default.  List<SymbolLayerInfo> eyeSymbolInfos = new List<SymbolLayerInfo> { new SymbolLayerInfo("", emptyImage, "") };  List<SymbolLayerInfo> mouthSymbolInfos = new List<SymbolLayerInfo> { new SymbolLayerInfo("", emptyImage, "") };  List<SymbolLayerInfo> hatSymbolInfos = new List<SymbolLayerInfo>() { new SymbolLayerInfo("", emptyImage, "") };   // Loop through the results and put symbols into the appropriate list according to category.  foreach (SymbolStyleSearchResult result in styleResults)  {  // Get the symbol for this result.  MultilayerPointSymbol multiLayerSym = await result.GetSymbolAsync() as MultilayerPointSymbol;   // Create a swatch image from the symbol.  RuntimeImage swatch = await multiLayerSym.CreateSwatchAsync();  WinMedia.ImageSource symbolImage = await swatch.ToImageSourceAsync();   // Create a symbol layer info object to represent the symbol in the list.  // The symbol key will be used to retrieve the symbol from the style.  SymbolLayerInfo symbolInfo = new SymbolLayerInfo(result.Name, symbolImage, result.Key);   // Add the symbol layer info to the correct list for its category.  switch (result.Category)  {  case "Eyes":  {  eyeSymbolInfos.Add(symbolInfo);  break;  }  case "Mouth":  {  mouthSymbolInfos.Add(symbolInfo);  break;  }  case "Hat":  {  hatSymbolInfos.Add(symbolInfo);  break;  }  }  }   // Show the symbols in the category list boxes.  EyeSymbolList.ItemsSource = eyeSymbolInfos;  MouthSymbolList.ItemsSource = mouthSymbolInfos;  HatSymbolList.ItemsSource = hatSymbolInfos;   // Call a function to construct the current symbol (default yellow circle).  Symbol faceSymbol = await GetCurrentSymbol();   // Call a function to show a preview image of the symbol.  await UpdateSymbolPreview(faceSymbol);  }  catch (Exception ex)  {  MessageBox.Show("Error reading symbols from style: " + ex.Message);  }  }   // Handler for the tapped event on the map view.  private async void GeoViewTapped(object sender, GeoViewInputEventArgs e)  {  try  {  // Call a function to get the currently defined multilayer point symbol.  MultilayerPointSymbol faceSymbol = await GetCurrentSymbol();   // Create a graphic for the tapped location using the current symbol and add it to the map view.  Graphic graphic = new Graphic(e.Location, faceSymbol);  MyMapView.GraphicsOverlays.First().Graphics.Add(graphic);  }  catch (Exception ex)  {  MessageBox.Show(ex.Message, "Error");  }  }   // An event handler for list box and combo box selection changes that will update the current symbol.  private async void SymbolPropertyChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)  {  try  {  // Call a function that will construct the current symbol.  Symbol faceSymbol = await GetCurrentSymbol();   // Call a function to update the symbol preview.  await UpdateSymbolPreview(faceSymbol);  }  catch (Exception ex)  {  MessageBox.Show(ex.Message, "Error");  }  }   private async Task<MultilayerPointSymbol> GetCurrentSymbol()  {  // If the style hasn't been opened, return.  if (_emojiStyle == null) { return null; }   MultilayerPointSymbol faceSymbol = null;  try  {  // Get the key that identifies the selected eye symbol (or an empty string if none selected).  SymbolLayerInfo eyeLayerInfo = (SymbolLayerInfo)EyeSymbolList.SelectedItem;  string eyeLayerKey = eyeLayerInfo != null ? eyeLayerInfo.Key : string.Empty;   // Get the key that identifies the selected mouth symbol (or an empty string if none selected).  SymbolLayerInfo mouthLayerInfo = (SymbolLayerInfo)MouthSymbolList.SelectedItem;  string mouthLayerKey = mouthLayerInfo != null ? mouthLayerInfo.Key : string.Empty;   // Get the key that identifies the selected hat symbol (or an empty string if none selected).  SymbolLayerInfo hatLayerInfo = (SymbolLayerInfo)HatSymbolList.SelectedItem;  string hatLayerKey = hatLayerInfo != null ? hatLayerInfo.Key : string.Empty;   // Create a list of the symbol keys that identify the selected symbol layers, including the base (circle) symbol.  List<string> symbolKeys = new List<string>  {  _baseSymbolKey, eyeLayerKey, mouthLayerKey, hatLayerKey  };   // Get a multilayer point symbol from the style that contains the selected symbol layers.  faceSymbol = await _emojiStyle.GetSymbolAsync(symbolKeys) as MultilayerPointSymbol;   // Loop through all symbol layers and lock the color.  foreach (SymbolLayer lyr in faceSymbol.SymbolLayers)  {  // Changing the color of the symbol will not affect this layer.  lyr.IsColorLocked = true;  }   // Unlock the color for the base (first) layer. Changing the symbol color will change this layer's color.  faceSymbol.SymbolLayers.First().IsColorLocked = false;   // Set the symbol color from the combo box.  if (FaceColorComboBox.SelectedItem != null)  {  faceSymbol.Color = (Color)FaceColorComboBox.SelectedItem;  }   // Set the symbol size from the slider.  faceSymbol.Size = SizeSlider.Value;  }  catch (Exception ex)  {  MessageBox.Show("Unable to create symbol: " + ex.Message, "Exception");  }   // Return the multilayer point symbol.  return faceSymbol;  }   private async Task UpdateSymbolPreview(Symbol symbolToShow)  {  if (symbolToShow == null) { return; }   // Create a swatch from the symbol with a white background.  RuntimeImage swatch = await symbolToShow.CreateSwatchAsync(80, 80, 96, Color.White);   // Convert the swatch to an image source and show it in the Image control.  WinMedia.ImageSource symbolImage = await swatch.ToImageSourceAsync();  SymbolPreviewImage.Source = symbolImage;  }   // A handler for the click event on the clear graphics button.  private void ClearGraphicsClick(object sender, RoutedEventArgs e)  {  // Clear all graphics from the first (only) graphics overlay in the map view.  MyMapView.GraphicsOverlays.FirstOrDefault()?.Graphics.Clear();  }  }   // A class for storing information about a symbol layer.  public class SymbolLayerInfo  {  // An image source for a preview image of the symbol.  public WinMedia.ImageSource ImageSrc { get; private set; }   // The name of the symbol as it appears in the mobile style.  public string Name { get; private set; }   // A key that uniquely identifies the symbol in the style.  public string Key { get; private set; }   // Take all symbol info in the constructor.  public SymbolLayerInfo(string name, WinMedia.ImageSource source, string key)  {  Name = name;  ImageSrc = source;  Key = key;  }  } }