Snap geometry edits with utility network rules

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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 // Copyright 2025 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 // // https://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.  import ArcGIS import SwiftUI  struct SnapGeometryEditsWithUtilityNetworkRulesView: View {  /// The display scale of this environment.  @Environment(\.displayScale) private var displayScale   /// The view model for the sample.  @StateObject private var model = Model()   /// The images representing the different snap rule behavior cases.  @State private var ruleBehaviorImages: [SnapRuleBehavior?: Image] = [:]   /// The various states of the sample.  private enum SampleState: Equatable {  /// The sample is being set up.  case setup  /// The given tap point is being identified.  case identifying(tapPoint: CGPoint)  /// The selected feature's geometry is being edited.  case editing  /// The feature's edits are being saved to its table.  case saving  }   /// The current state of the sample.  @State private var state = SampleState.setup   /// A Boolean value indicating whether there are edits to be saved.  @State private var canSave = false   /// A Boolean value indicating whether snap sources list is showing.  @State private var sourcesListIsPresented = false   /// The error shown in the error alert.  @State private var error: Error?   /// The instruction text indicating the next step in the sample's workflow.  private var instructionText: String {  if state == .editing {  canSave  ? "Tap the save button to save the edits."  : "Tap on the map to update the feature's geometry."  } else {  model.selectedElement == nil  ? "Tap the map to select a feature."  : "Tap the edit button to update the feature."  }  }   var body: some View {  MapViewReader { mapViewProxy in  MapView(map: model.map, graphicsOverlays: [model.graphicsOverlay])  .geometryEditor(model.geometryEditor)  .onSingleTapGesture { screenPoint, _ in  state = .identifying(tapPoint: screenPoint)  }  .task(id: state) {  // Runs the async action related to the current sample state.  do {  switch state {  case .setup:  try await model.setUp()  case .identifying(let tapPoint):  let identifyResults = try await mapViewProxy.identifyLayers(  screenPoint: tapPoint,  tolerance: 5  )  try await model.selectFeature(from: identifyResults)  case .editing:  model.startEditing()   for await canUndo in model.geometryEditor.$canUndo {  canSave = canUndo  }  case .saving:  try await model.save()  }  } catch {  self.error = error  }  }  .errorAlert(presentingError: $error)  }  .overlay(alignment: .top) {  VStack(alignment: .trailing, spacing: 0) {  Text(instructionText)  .multilineTextAlignment(.center)  .frame(maxWidth: .infinity)  .padding(8)  .background(.thinMaterial, ignoresSafeAreaEdges: .horizontal)   if let selectedElement = model.selectedElement {  VStack(alignment: .leading) {  LabeledContent("Asset Group:", value: selectedElement.assetGroup.name)  LabeledContent("Asset Type:", value: selectedElement.assetType.name)  }  .fixedSize()  .padding()  .background(.thinMaterial)  .clipShape(.rect(cornerRadius: 10))  .shadow(radius: 3)  .padding(8)  .transition(.move(edge: .trailing))   Spacer()   SnapRuleBehaviorLegend(images: ruleBehaviorImages)  .frame(maxWidth: .infinity)  .padding(8)  .background(.thinMaterial, ignoresSafeAreaEdges: .horizontal)  }  }  .animation(.default, value: model.selectedElement == nil)  }  .toolbar {  ToolbarItemGroup(placement: .bottomBar) {  Button("Cancel", systemImage: "xmark") {  model.geometryEditor.stop()  model.resetSelection()  }  .disabled(model.selectedElement == nil)   Spacer()   Button("Snap Sources") {  sourcesListIsPresented = true  }  .disabled(model.snapSourceSettings.isEmpty)  .popover(isPresented: $sourcesListIsPresented) {  SnapSourcesList(  settings: model.snapSourceSettings,  ruleBehaviorImages: ruleBehaviorImages  )  .presentationDetents([.fraction(0.5)])  .frame(idealWidth: 320, idealHeight: 390)  }   Spacer()   if state == .editing {  Button("Save", systemImage: "checkmark") {  state = .saving  }  .disabled(!canSave)  } else {  Button("Edit", systemImage: "pencil") {  state = .editing  }  .disabled(model.selectedElement == nil)  }  }  }  .task(id: displayScale) {  // Creates an image from each rule behavior's symbol.  for behavior in SnapRuleBehavior?.allCases {  let swatch = try? await behavior.symbol.makeSwatch(scale: displayScale)  ruleBehaviorImages[behavior] = swatch.map(Image.init(uiImage:))  }  }  } }  // MARK: - Helper Views  /// The legend for the different snap rule behavior cases. private struct SnapRuleBehaviorLegend: View {  /// The images representing the different snap rule behavior cases.  let images: [SnapRuleBehavior?: Image]   var body: some View {  LabeledContent("Snapping") {  HStack {  ForEach(SnapRuleBehavior?.allCases, id: \.self) { behavior in  Label {  Text(behavior.label)  } icon: {  images[behavior]  }  }  }  }  .font(.footnote)  } }  /// A list for enabling and disabling snap source settings. private struct SnapSourcesList: View {  /// The snap source settings to show in the list.  let settings: [SnapSourceSettings]   /// The images representing the different snap rule behavior cases.  let ruleBehaviorImages: [SnapRuleBehavior?: Image]   /// The action to dismiss the view.  @Environment(\.dismiss) private var dismiss   var body: some View {  NavigationStack {  Form {  ForEach(Array(settings.enumerated()), id: \.offset) { _, settings in  let image = ruleBehaviorImages[settings.ruleBehavior]  SnapSourceSettingsToggle(settings: settings, image: image)  }  }  .navigationTitle("Snap Sources")  .navigationBarTitleDisplayMode(.inline)  .toolbar {  ToolbarItem(placement: .confirmationAction) {  Button("Done") { dismiss() }  }  }  }  } }  /// A toggle for enabling and disabling a given snap source settings. private struct SnapSourceSettingsToggle: View {  /// The snap source settings to enable and disable.  let settings: SnapSourceSettings   /// The image to use in the toggle's label.  let image: Image?   /// A Boolean value indicating whether the toggle is enabled.  @State private var isEnabled = false   var body: some View {  Toggle(isOn: $isEnabled) {  Label {  Text(settings.source.name)  } icon: {  image  }  }  .onChange(of: isEnabled) {  settings.isEnabled = isEnabled  }  .onAppear {  isEnabled = settings.isEnabled  }  } }  // MARK: - Extensions  extension SnapSource {  /// The name of the snap source.  var name: String {  switch self {  case let graphicsOverlay as GraphicsOverlay:  graphicsOverlay.id  case let layerContent as LayerContent:  layerContent.name  default:  "\(self)"  }  } }  extension Optional<SnapRuleBehavior> {  fileprivate static var allCases: [Self] {  return [.none, .rulesLimitSnapping, .rulesPreventSnapping]  }   /// The legend label for the snap rule behavior.  fileprivate var label: String {  switch self {  case .rulesLimitSnapping: "Limited"  case .rulesPreventSnapping: "Prevented"  default: "Allowed"  }  }   /// The symbol representing the snap rule behavior.  var symbol: Symbol {  switch self {  case .rulesLimitSnapping:  SimpleLineSymbol(style: .solid, color: .orange, width: 3)  case .rulesPreventSnapping:  SimpleLineSymbol(style: .solid, color: .red, width: 3)  default:  SimpleLineSymbol(style: .dash, color: .green, width: 3)  }  } }