Stub measurements, updated screenshots

Accelerometer.xcodeproj/project.pbxproj

@@ -45,6 +45,7 @@
 		0B548E1A2876ED5000EDCDA8 /* MeasurementPreview.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B548E192876ED5000EDCDA8 /* MeasurementPreview.swift */; };
 		0B6DD8CF2B816BED0076D93A /* ChartEntry.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B6DD8CE2B816BED0076D93A /* ChartEntry.swift */; };
 		0B7A81602E816FE900399013 /* AlwaysNotEnoughMemoryView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B7A815F2E816FE900399013 /* AlwaysNotEnoughMemoryView.swift */; };
+		0B7F6D7E2E92A77F00AE5F38 /* StubMeasurementsView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B7F6D7D2E92A77200AE5F38 /* StubMeasurementsView.swift */; };
 		0B801286286DA9C000F4AA85 /* AnimatableArray.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B801285286DA9C000F4AA85 /* AnimatableArray.swift */; };
 		0B8C3B2A2A99F9FF00488B1E /* Axis.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B8C3B292A99F9FF00488B1E /* Axis.swift */; };
 		0B8C3B2C2A99FC9600488B1E /* Axes.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0B8C3B2B2A99FC9600488B1E /* Axes.swift */; };
@@ -144,6 +145,7 @@
 		0B548E192876ED5000EDCDA8 /* MeasurementPreview.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MeasurementPreview.swift; sourceTree = "<group>"; };
 		0B6DD8CE2B816BED0076D93A /* ChartEntry.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChartEntry.swift; sourceTree = "<group>"; };
 		0B7A815F2E816FE900399013 /* AlwaysNotEnoughMemoryView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AlwaysNotEnoughMemoryView.swift; sourceTree = "<group>"; };
+		0B7F6D7D2E92A77200AE5F38 /* StubMeasurementsView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StubMeasurementsView.swift; sourceTree = "<group>"; };
 		0B801285286DA9C000F4AA85 /* AnimatableArray.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnimatableArray.swift; sourceTree = "<group>"; };
 		0B8C3B292A99F9FF00488B1E /* Axis.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Axis.swift; sourceTree = "<group>"; };
 		0B8C3B2B2A99FC9600488B1E /* Axes.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Axes.swift; sourceTree = "<group>"; };
@@ -305,6 +307,7 @@
 		0B24EC3C2862327E00AD3EF1 /* Settings */ = {
 			isa = PBXGroup;
 			children = (
+				0B7F6D7D2E92A77200AE5F38 /* StubMeasurementsView.swift */,
 				0B36DFC9289A9E85007130D9 /* Settings.swift */,
 				0B24EC3928622B7100AD3EF1 /* SettingsView.swift */,
 				0B24EC3D286232A900AD3EF1 /* RefreshRateView.swift */,
@@ -721,6 +724,7 @@
 				0B24EC45286247AD00AD3EF1 /* String.swift in Sources */,
 				0B9FB1552E8F52CA00D70505 /* DebugSamplesView.swift in Sources */,
 				0BDED2D828983A4D00CAEAC3 /* DateComponents.swift in Sources */,
+				0B7F6D7E2E92A77F00AE5F38 /* StubMeasurementsView.swift in Sources */,
 				0B24EC3A28622B7100AD3EF1 /* SettingsView.swift in Sources */,
 				0B36DFCA289A9E85007130D9 /* Settings.swift in Sources */,
 				0BA5B7BC2AD319AC004F1808 /* AttitudeAxesSummaryView.swift in Sources */,
@@ -940,7 +944,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 2;
+				CURRENT_PROJECT_VERSION = 3;
 				DEVELOPMENT_ASSET_PATHS = "\"Accelerometer/Preview Content\"";
 				DEVELOPMENT_TEAM = 3HG9ZBM8AV;
 				ENABLE_PREVIEWS = YES;
@@ -961,6 +965,10 @@
 				MARKETING_VERSION = 0.2.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.panandafog.Accelerometer;
 				PRODUCT_NAME = Acc.elerometer;
+				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
@@ -974,7 +982,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 2;
+				CURRENT_PROJECT_VERSION = 3;
 				DEVELOPMENT_ASSET_PATHS = "\"Accelerometer/Preview Content\"";
 				DEVELOPMENT_TEAM = 3HG9ZBM8AV;
 				ENABLE_PREVIEWS = YES;
@@ -995,6 +1003,10 @@
 				MARKETING_VERSION = 0.2.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.panandafog.Accelerometer;
 				PRODUCT_NAME = Acc.elerometer;
+				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 6.0;
 				TARGETED_DEVICE_FAMILY = "1,2";

Accelerometer.xcodeproj/xcshareddata/xcschemes/Accelerometer.xcscheme

@@ -53,7 +53,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Release"
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"

Accelerometer/Measurements/Measurer.swift

@@ -29,6 +29,7 @@ class Measurer: ObservableObject {
     private let motion = CMMotionManager()
 
     private var settingsSubscription: AnyCancellable?
+    private var stubTimer: AnyCancellable?
 
     init(settings: Settings) {
         self.settings = settings
@@ -38,17 +39,43 @@ class Measurer: ObservableObject {
                 if ((self?.motion.isDeviceMotionActive) != nil) {
                     self?.prepareMotion()
                 }
+                if self?.settings.stubMeasurements == true {
+                    self?.restartStubTimer()
+                }
             }
+
+        if settings.stubMeasurements {
+            startStubMeasurements()
+        }
     }
 
     func startAll() {
-        startDeviceMotion()
-        startAccelerometer()
-        startGyro()
-        startMagnetometer()
-        startProximity()
+        if settings.stubMeasurements {
+            startStubMeasurements()
+        } else {
+            startDeviceMotion()
+            startAccelerometer()
+            startGyro()
+            startMagnetometer()
+            startProximity()
+        }
+    }
+
+    func stopAll() {
+        if settings.stubMeasurements {
+            stubTimer?.cancel()
+            stubTimer = nil
+        } else {
+            stopDeviceMotion()
+            stopAccelerometer()
+            stopGyro()
+            stopMagnetometer()
+            stopProximity()
+        }
     }
 
+    // MARK: — Real sensors
+
     func startDeviceMotion() {
         guard !motion.isDeviceMotionActive else {
             return
@@ -97,7 +124,7 @@ class Measurer: ObservableObject {
             guard let data = data else {
                 fatalError("no data")
             }
-
+            
             saveData(
                 axesType: TriangleAxes.self,
                 measurementType: .acceleration,
@@ -159,21 +186,13 @@ class Measurer: ObservableObject {
         NotificationCenter.default.addObserver(
             self,
             selector: #selector(proximityDidChange),
-            name: 
+            name:
                 UIDevice
                 .proximityStateDidChangeNotification,
             object: UIDevice.current
         )
     }
 
-    func stopAll() {
-        stopDeviceMotion()
-        stopAccelerometer()
-        stopGyro()
-        stopMagnetometer()
-        stopProximity()
-    }
-
     func stopDeviceMotion() {
         motion.stopDeviceMotionUpdates()
     }
@@ -194,6 +213,84 @@ class Measurer: ObservableObject {
         NotificationCenter.default.removeObserver(self)
     }
 
+    // MARK: — Stub measurements for emulator
+
+    private func startStubMeasurements() {
+        stubTimer = Timer
+            .publish(
+                every: settings.updateInterval,
+                on: .main,
+                in: .common
+            )
+            .autoconnect()
+            .sink { [weak self] _ in
+                self?.emitStubValues()
+            }
+    }
+
+    private func restartStubTimer() {
+        stubTimer?.cancel()
+        startStubMeasurements()
+    }
+
+    private func emitStubValues() {
+        for type in MeasurementType.allShownCases {
+            let maxVal = displayableAbsMax[type] ?? 1.0
+
+            switch type {
+
+            case .acceleration, .userAcceleration, .gravity:
+                let vx = Double.random(in: -maxVal...maxVal)
+                let vy = Double.random(in: -maxVal...maxVal)
+                let vz = Double.random(in: -maxVal...maxVal)
+
+                saveData(
+                    axesType: TriangleAxes.self,
+                    measurementType: type,
+                    values: [.x: vx, .y: vy, .z: vz]
+                )
+
+            case .rotationRate:
+                let vx = Double.random(in: -maxVal...maxVal)
+                let vy = Double.random(in: -maxVal...maxVal)
+                let vz = Double.random(in: -maxVal...maxVal)
+
+                saveData(
+                    axesType: TriangleAxes.self,
+                    measurementType: type,
+                    values: [.x: vx, .y: vy, .z: vz]
+                )
+
+            case .magneticField:
+                let vx = Double.random(in: -maxVal...maxVal)
+                let vy = Double.random(in: -maxVal...maxVal)
+                let vz = Double.random(in: -maxVal...maxVal)
+
+                saveData(
+                    axesType: TriangleAxes.self,
+                    measurementType: type,
+                    values: [.x: vx, .y: vy, .z: vz]
+                )
+
+            case .attitude:
+                let roll  = Double.random(in: -maxVal...maxVal)
+                let pitch = Double.random(in: -maxVal...maxVal)
+                let yaw   = Double.random(in: -maxVal...maxVal)
+
+                saveData(
+                    axesType: AttitudeAxes.self,
+                    measurementType: .attitude,
+                    values: [.roll: roll, .pitch: pitch, .yaw: yaw]
+                )
+
+            default:
+                break
+            }
+        }
+    }
+
+    // MARK: — Shared helpers
+
     func resetAll() {
         MeasurementType.allCases.forEach {
             reset($0)
@@ -208,7 +305,11 @@ class Measurer: ObservableObject {
         motion.setUpdateInterval(settings.updateInterval)
     }
 
-    func saveData<AxesType: Axes>(axesType: AxesType.Type, measurementType: MeasurementType, values: [AxeType: AxesType.ValueType]) {
+    func saveData<AxesType: Axes>(
+        axesType: AxesType.Type,
+        measurementType: MeasurementType,
+        values: [AxeType: AxesType.ValueType]
+    ) {
         if observableAxes[measurementType] == nil {
             var axes = axesType.zero
             if let displayableAbsMax = displayableAbsMax[measurementType] as? AxesType.ValueType {
@@ -228,14 +329,13 @@ class Measurer: ObservableObject {
     }
 
     @objc func proximityDidChange(notification: NSNotification) {
-        guard let device = notification.object as? UIDevice else { return }
-        let currentProximityState = device.proximityState
-
-        saveData(
-            axesType: BooleanAxes.self,
-            measurementType: .proximity,
-            values: [.bool: currentProximityState]
-        )
+        if let device = notification.object as? UIDevice {
+            saveData(
+                axesType: BooleanAxes.self,
+                measurementType: .proximity,
+                values: [.bool: device.proximityState]
+            )
+        }
     }
 }
 

Accelerometer/Settings/Settings.swift

@@ -61,27 +61,53 @@ class Settings: ObservableObject {
     }
 
     // MARK: - Debug options
-    #if DEBUG
     var enableAnimations: Bool {
         get {
+#if DEBUG
             return UserDefaults.standard.bool(forKey: Key.enableAnimations.rawValue)
+#else
+            return true
+#endif
         }
         set {
+#if DEBUG
             objectWillChange.send()
             UserDefaults.standard.set(newValue, forKey: Key.enableAnimations.rawValue)
+#endif
         }
     }
 
     var alwaysNotEnoughMemory: Bool {
         get {
+#if DEBUG
             return UserDefaults.standard.bool(forKey: Key.alwaysNotEnoughMemory.rawValue)
+#else
+            return false
+#endif
         }
         set {
+#if DEBUG
             objectWillChange.send()
             UserDefaults.standard.set(newValue, forKey: Key.alwaysNotEnoughMemory.rawValue)
+#endif
+        }
+    }
+
+    var stubMeasurements: Bool {
+        get {
+#if DEBUG
+            return UserDefaults.standard.bool(forKey: Key.stubMeasurements.rawValue)
+#else
+            return false
+#endif
+        }
+        set {
+#if DEBUG
+            objectWillChange.send()
+            UserDefaults.standard.set(newValue, forKey: Key.stubMeasurements.rawValue)
+#endif
         }
     }
-    #endif
 }
 
 // MARK: - ExportDateFormat
@@ -118,6 +144,7 @@ extension Settings {
         #if DEBUG
         case enableAnimations = "EnableAnimations"
         case alwaysNotEnoughMemory = "AlwaysNotEnoughMemory"
+        case stubMeasurements = "StubMeasurements"
         #endif
         case measurementsUpdateInterval = "MeasurementsUpdateInterval"
     }

Accelerometer/Settings/SettingsView.swift

@@ -32,6 +32,7 @@ struct SettingsView: View {
                 footer: Text("Debug options")
             ) {
                 AnimationsView()
+                StubMeasurementsView()
                 AlwaysNotEnoughMemoryView()
                 DebugSamplesView()
             }

Accelerometer/Settings/StubMeasurementsView.swift

@@ -0,0 +1,34 @@
+//
+//  StubMeasurementsView.swift
+//  Accelerometer
+//
+//  Created by Andrey Pantyuhin on 05.10.2025.
+//
+
+import SwiftUI
+
+#if DEBUG
+struct StubMeasurementsView: View {
+
+    @EnvironmentObject var settings: Settings
+
+    var body: some View {
+        Toggle(
+            "Use stub measurements",
+            isOn: Binding(
+                get: { settings.stubMeasurements },
+                set: { settings.stubMeasurements = $0 }
+            )
+        )
+        .tint(.accentColor)
+    }
+}
+
+struct StubMeasurementsViewPreviews: PreviewProvider {
+    static var previews: some View {
+        StubMeasurementsView()
+            .previewLayout(.sizeThatFits)
+            .environmentObject(Settings())
+    }
+}
+#endif