Add refactoring previews.

Author: CalebRas

Shared/Samples/Download vector tiles to local cache/DownloadVectorTilesToLocalCacheView.swift

@@ -290,19 +290,6 @@ private extension DownloadVectorTilesToLocalCacheView {
     }
 }
 
-private extension MapViewProxy {
-    /// Creates an envelope from the given rectangle.
-    /// - Parameter viewRect: The rectangle to create an envelope of.
-    /// - Returns: An envelope of the given rectangle.
-    func envelope(fromViewRect viewRect: CGRect) -> Envelope? {
-        guard let min = location(fromScreenPoint: CGPoint(x: viewRect.minX, y: viewRect.minY)),
-              let max = location(fromScreenPoint: CGPoint(x: viewRect.maxX, y: viewRect.maxY)) else {
-            return nil
-        }
-        return Envelope(min: min, max: max)
-    }
-}
-
 private extension Envelope {
     /// Expands the envelope by a given factor.
     func expanded(by factor: Double) -> Envelope {
@@ -311,3 +298,9 @@ private extension Envelope {
         return builder.toGeometry()
     }
 }
+
+#Preview {
+    NavigationView {
+        DownloadVectorTilesToLocalCacheView()
+    }
+}

Shared/Samples/Generate offline map/GenerateOfflineMapView.swift

@@ -242,19 +242,6 @@ private extension GenerateOfflineMapView {
     }
 }
 
-private extension MapViewProxy {
-    /// Creates an envelope from the given rectangle.
-    /// - Parameter viewRect: The rectangle to create an envelope of.
-    /// - Returns: An envelope of the given rectangle.
-    func envelope(fromViewRect viewRect: CGRect) -> Envelope? {
-        guard let min = location(fromScreenPoint: CGPoint(x: viewRect.minX, y: viewRect.minY)),
-              let max = location(fromScreenPoint: CGPoint(x: viewRect.maxX, y: viewRect.maxY)) else {
-            return nil
-        }
-        return Envelope(min: min, max: max)
-    }
-}
-
 private extension Envelope {
     /// Expands the envelope by a given factor.
     func expanded(by factor: Double) -> Envelope {
@@ -263,3 +250,9 @@ private extension Envelope {
         return builder.toGeometry()
     }
 }
+
+#Preview {
+    NavigationView {
+        GenerateOfflineMapView()
+    }
+}

Shared/Samples/Navigate route/NavigateRouteView.swift

@@ -154,7 +154,7 @@ private extension NavigateRouteView {
             autoPanMode = .off
 
             // Creates the graphics for each stop.
-            let stopGraphics = stops.map {
+            let stopGraphics = Self.stops.map {
                 Graphic(
                     geometry: $0.geometry,
                     symbol: SimpleMarkerSymbol(style: .diamond, color: .orange, size: 20)
@@ -183,7 +183,7 @@ private extension NavigateRouteView {
                 parameters.outputSpatialReference = .wgs84
 
                 // Sets the stops on the parameters.
-                parameters.setStops(stops)
+                parameters.setStops(Self.stops)
 
                 // Solves the route based on the parameters.
                 routeResult = try await routeTask.solveRoute(using: parameters)
@@ -323,7 +323,9 @@ private extension NavigateRouteView {
             isResettingRoute = false
         }
     }
-    
+}
+
+private extension NavigateRouteView.Model {
     /// The stops for this sample.
     static var stops: [Stop] {
         let one = Stop(point: Point(x: -117.160386727, y: 32.706608, spatialReference: .wgs84))
@@ -348,3 +350,9 @@ private extension URL {
         URL(string: "http://sampleserver7.arcgisonline.com/server/rest/services/NetworkAnalysis/SanDiego/NAServer/Route")!
     }
 }
+
+#Preview {
+    NavigationView {
+        NavigateRouteView()
+    }
+}

Shared/Samples/Set min and max scale/SetMinAndMaxScaleView.swift

@@ -34,3 +34,7 @@ struct SetMinAndMaxScaleView: View {
         MapView(map: map)
     }
 }
+
+#Preview {
+    SetMinAndMaxScaleView()
+}

Shared/Samples/Show device location/ShowDeviceLocationView.swift

@@ -123,8 +123,6 @@ private extension ShowDeviceLocationView {
 }
 
 private extension LocationDisplay.AutoPanMode {
-    static var allCases: [LocationDisplay.AutoPanMode] { [.off, .recenter, .navigation, .compassNavigation] }
-    
     /// A human-readable label for each auto-pan mode.
     var label: String {
         switch self {
@@ -147,3 +145,9 @@ private extension LocationDisplay.AutoPanMode {
         }
     }
 }
+
+#Preview {
+    NavigationView {
+        ShowDeviceLocationView()
+    }
+}

Shared/Samples/Show result of spatial operations/ShowResultOfSpatialOperationsView.swift

@@ -167,3 +167,15 @@ private extension Geometry {
         )
     }
 }
+
+#if DEBUG
+private extension ShowResultOfSpatialOperationsView.Model {
+    typealias SpatialOperation = ShowResultOfSpatialOperationsView.SpatialOperation
+}
+
+#Preview {
+    NavigationView {
+        ShowResultOfSpatialOperationsView()
+    }
+}
+#endif

Shared/Samples/Show result of spatial relationships/ShowResultOfSpatialRelationshipsView.swift

@@ -272,3 +272,13 @@ private extension Graphic {
         return Graphic(geometry: point, symbol: markerSymbol)
     }
 }
+
+#if DEBUG
+private extension ShowResultOfSpatialRelationshipsView.Model {
+    typealias Relationship = ShowResultOfSpatialRelationshipsView.Relationship
+}
+
+#Preview {
+    ShowResultOfSpatialRelationshipsView()
+}
+#endif