Add `Switch.trackOutlineWidth` property (#125848)

dev/tools/gen_defaults/lib/switch_template.dart

@@ -126,6 +126,9 @@ class _${blockName}DefaultsM3 extends SwitchThemeData {
     });
   }
 
+  @override
+  MaterialStatePropertyAll<double> get trackOutlineWidth => const MaterialStatePropertyAll<double>(${tokens['md.comp.switch.track.outline.width']});
+
   @override
   double get splashRadius => ${tokens['md.comp.switch.state-layer.size']} / 2;
 }

packages/flutter/lib/src/material/switch.dart

@@ -106,6 +106,7 @@ class Switch extends StatelessWidget {
     this.thumbColor,
     this.trackColor,
     this.trackOutlineColor,
+    this.trackOutlineWidth,
     this.thumbIcon,
     this.materialTapTargetSize,
     this.dragStartBehavior = DragStartBehavior.start,
@@ -132,7 +133,7 @@ class Switch extends StatelessWidget {
   /// design [Switch].
   ///
   /// If a [CupertinoSwitch] is created, the following parameters are ignored:
-  /// [activeTrackColor], [inactiveThumbColor], [inactiveTrackColor],
+  /// [activeTrackColor], [inactiveThumbColor], [inactiveTrackColor], [trackOutlineWidth]
   /// [activeThumbImage], [onActiveThumbImageError], [inactiveThumbImage],
   /// [onInactiveThumbImageError], [materialTapTargetSize].
   ///
@@ -153,6 +154,7 @@ class Switch extends StatelessWidget {
     this.thumbColor,
     this.trackColor,
     this.trackOutlineColor,
+    this.trackOutlineWidth,
     this.thumbIcon,
     this.dragStartBehavior = DragStartBehavior.start,
     this.mouseCursor,
@@ -286,7 +288,7 @@ class Switch extends StatelessWidget {
   /// ```dart
   /// Switch(
   ///   value: true,
-  ///   onChanged: (_) => true,
+  ///   onChanged: (bool value) { },
   ///   thumbColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.disabled)) {
   ///       return Colors.orange.withOpacity(.48);
@@ -327,7 +329,7 @@ class Switch extends StatelessWidget {
   /// ```dart
   /// Switch(
   ///   value: true,
-  ///   onChanged: (_) => true,
+  ///   onChanged: (bool value) { },
   ///   thumbColor: MaterialStateProperty.resolveWith<Color>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.disabled)) {
   ///       return Colors.orange.withOpacity(.48);
@@ -368,7 +370,7 @@ class Switch extends StatelessWidget {
   /// ```dart
   /// Switch(
   ///   value: true,
-  ///   onChanged: (_) => true,
+  ///   onChanged: (bool value) { },
   ///   trackOutlineColor: MaterialStateProperty.resolveWith<Color?>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.disabled)) {
   ///       return Colors.orange.withOpacity(.48);
@@ -385,6 +387,38 @@ class Switch extends StatelessWidget {
   /// the [Switch] track has no outline by default.
   final MaterialStateProperty<Color?>? trackOutlineColor;
 
+  /// {@template flutter.material.switch.trackOutlineWidth}
+  /// The outline width of this [Switch]'s track.
+  ///
+  /// Resolved in the following states:
+  ///  * [MaterialState.selected].
+  ///  * [MaterialState.hovered].
+  ///  * [MaterialState.focused].
+  ///  * [MaterialState.disabled].
+  ///
+  /// {@tool snippet}
+  /// This example resolves the [trackOutlineWidth] based on the current
+  /// [MaterialState] of the [Switch], providing a different outline width when it is
+  /// [MaterialState.disabled].
+  ///
+  /// ```dart
+  /// Switch(
+  ///   value: true,
+  ///   onChanged: (bool value) { },
+  ///   trackOutlineWidth: MaterialStateProperty.resolveWith<double?>((Set<MaterialState> states) {
+  ///     if (states.contains(MaterialState.disabled)) {
+  ///       return 5.0;
+  ///     }
+  ///     return null; // Use the default width.
+  ///   }),
+  /// )
+  /// ```
+  /// {@end-tool}
+  /// {@endtemplate}
+  ///
+  /// Defaults to 2.0.
+  final MaterialStateProperty<double?>? trackOutlineWidth;
+
   /// {@template flutter.material.switch.thumbIcon}
   /// The icon to use on the thumb of this switch
   ///
@@ -402,7 +436,7 @@ class Switch extends StatelessWidget {
   /// ```dart
   /// Switch(
   ///   value: true,
-  ///   onChanged: (_) => true,
+  ///   onChanged: (bool value) { },
   ///   thumbIcon: MaterialStateProperty.resolveWith<Icon?>((Set<MaterialState> states) {
   ///     if (states.contains(MaterialState.disabled)) {
   ///       return const Icon(Icons.close);
@@ -572,6 +606,7 @@ class Switch extends StatelessWidget {
       thumbColor: thumbColor,
       trackColor: trackColor,
       trackOutlineColor: trackOutlineColor,
+      trackOutlineWidth: trackOutlineWidth,
       thumbIcon: thumbIcon,
       materialTapTargetSize: materialTapTargetSize,
       dragStartBehavior: dragStartBehavior,
@@ -632,6 +667,7 @@ class _MaterialSwitch extends StatefulWidget {
     this.thumbColor,
     this.trackColor,
     this.trackOutlineColor,
+    this.trackOutlineWidth,
     this.thumbIcon,
     this.materialTapTargetSize,
     this.dragStartBehavior = DragStartBehavior.start,
@@ -659,6 +695,7 @@ class _MaterialSwitch extends StatefulWidget {
   final MaterialStateProperty<Color?>? thumbColor;
   final MaterialStateProperty<Color?>? trackColor;
   final MaterialStateProperty<Color?>? trackOutlineColor;
+  final MaterialStateProperty<double?>? trackOutlineWidth;
   final MaterialStateProperty<Icon?>? thumbIcon;
   final MaterialTapTargetSize? materialTapTargetSize;
   final DragStartBehavior dragStartBehavior;
@@ -821,6 +858,9 @@ class _MaterialSwitchState extends State<_MaterialSwitch> with TickerProviderSta
     final Color effectiveActiveTrackOutlineColor = widget.trackOutlineColor?.resolve(activeStates)
       ?? switchTheme.trackOutlineColor?.resolve(activeStates)
       ?? Colors.transparent;
+    final double? effectiveActiveTrackOutlineWidth = widget.trackOutlineWidth?.resolve(activeStates)
+      ?? switchTheme.trackOutlineWidth?.resolve(activeStates)
+      ?? defaults.trackOutlineWidth?.resolve(activeStates);
 
     final Color effectiveInactiveTrackColor = widget.trackColor?.resolve(inactiveStates)
       ?? _widgetTrackColor.resolve(inactiveStates)
@@ -829,6 +869,9 @@ class _MaterialSwitchState extends State<_MaterialSwitch> with TickerProviderSta
     final Color? effectiveInactiveTrackOutlineColor = widget.trackOutlineColor?.resolve(inactiveStates)
       ?? switchTheme.trackOutlineColor?.resolve(inactiveStates)
       ?? defaults.trackOutlineColor?.resolve(inactiveStates);
+    final double? effectiveInactiveTrackOutlineWidth = widget.trackOutlineWidth?.resolve(inactiveStates)
+      ?? switchTheme.trackOutlineWidth?.resolve(inactiveStates)
+      ?? defaults.trackOutlineWidth?.resolve(inactiveStates);
 
     final Icon? effectiveActiveIcon = widget.thumbIcon?.resolve(activeStates)
       ?? switchTheme.thumbIcon?.resolve(activeStates);
@@ -918,8 +961,10 @@ class _MaterialSwitchState extends State<_MaterialSwitch> with TickerProviderSta
             ..onInactiveThumbImageError = widget.onInactiveThumbImageError
             ..activeTrackColor = effectiveActiveTrackColor
             ..activeTrackOutlineColor = effectiveActiveTrackOutlineColor
+            ..activeTrackOutlineWidth = effectiveActiveTrackOutlineWidth
             ..inactiveTrackColor = effectiveInactiveTrackColor
             ..inactiveTrackOutlineColor = effectiveInactiveTrackOutlineColor
+            ..inactiveTrackOutlineWidth = effectiveInactiveTrackOutlineWidth
             ..configuration = createLocalImageConfiguration(context)
             ..isInteractive = isInteractive
             ..trackInnerLength = _trackInnerLength
@@ -1169,6 +1214,26 @@ class _SwitchPainter extends ToggleablePainter {
     notifyListeners();
   }
 
+  double? get activeTrackOutlineWidth => _activeTrackOutlineWidth;
+  double? _activeTrackOutlineWidth;
+  set activeTrackOutlineWidth(double? value) {
+    if (value == _activeTrackOutlineWidth) {
+      return;
+    }
+    _activeTrackOutlineWidth = value;
+    notifyListeners();
+  }
+
+  double? get inactiveTrackOutlineWidth => _inactiveTrackOutlineWidth;
+  double? _inactiveTrackOutlineWidth;
+  set inactiveTrackOutlineWidth(double? value) {
+    if (value == _inactiveTrackOutlineWidth) {
+      return;
+    }
+    _inactiveTrackOutlineWidth = value;
+    notifyListeners();
+  }
+
   Color get inactiveTrackColor => _inactiveTrackColor!;
   Color? _inactiveTrackColor;
   set inactiveTrackColor(Color value) {
@@ -1366,6 +1431,7 @@ class _SwitchPainter extends ToggleablePainter {
     final Color trackColor = Color.lerp(inactiveTrackColor, activeTrackColor, colorValue)!;
     final Color? trackOutlineColor = inactiveTrackOutlineColor == null ? null
         : Color.lerp(inactiveTrackOutlineColor, activeTrackOutlineColor, colorValue);
+    final double? trackOutlineWidth = lerpDouble(inactiveTrackOutlineWidth, activeTrackOutlineWidth, colorValue);
     Color lerpedThumbColor;
     if (!reaction.isDismissed) {
       lerpedThumbColor = Color.lerp(inactivePressedColor, activePressedColor, colorValue)!;
@@ -1395,7 +1461,7 @@ class _SwitchPainter extends ToggleablePainter {
     final Offset thumbPaintOffset = _computeThumbPaintOffset(trackPaintOffset, thumbSize, visualPosition);
     final Offset radialReactionOrigin = Offset(thumbPaintOffset.dx + thumbSize.height / 2, size.height / 2);
 
-    _paintTrackWith(canvas, paint, trackPaintOffset, trackOutlineColor);
+    _paintTrackWith(canvas, paint, trackPaintOffset, trackOutlineColor, trackOutlineWidth);
     paintRadialReaction(canvas: canvas, origin: radialReactionOrigin);
     _paintThumbWith(
       thumbPaintOffset,
@@ -1433,7 +1499,7 @@ class _SwitchPainter extends ToggleablePainter {
     return Offset(thumbHorizontalOffset, thumbVerticalOffset);
   }
 
-  void _paintTrackWith(Canvas canvas, Paint paint, Offset trackPaintOffset, Color? trackOutlineColor) {
+  void _paintTrackWith(Canvas canvas, Paint paint, Offset trackPaintOffset, Color? trackOutlineColor, double? trackOutlineWidth) {
     final Rect trackRect = Rect.fromLTWH(
       trackPaintOffset.dx,
       trackPaintOffset.dy,
@@ -1462,7 +1528,7 @@ class _SwitchPainter extends ToggleablePainter {
       );
       final Paint outlinePaint = Paint()
         ..style = PaintingStyle.stroke
-        ..strokeWidth = 2
+        ..strokeWidth = trackOutlineWidth ?? 2.0
         ..color = trackOutlineColor;
       canvas.drawRRect(outlineTrackRRect, outlinePaint);
     }
@@ -1808,6 +1874,9 @@ class _SwitchDefaultsM3 extends SwitchThemeData {
     });
   }
 
+  @override
+  MaterialStatePropertyAll<double> get trackOutlineWidth => const MaterialStatePropertyAll<double>(2.0);
+
   @override
   double get splashRadius => 40.0 / 2;
 }

packages/flutter/lib/src/material/switch_theme.dart

@@ -40,6 +40,7 @@ class SwitchThemeData with Diagnosticable {
     this.thumbColor,
     this.trackColor,
     this.trackOutlineColor,
+    this.trackOutlineWidth,
     this.materialTapTargetSize,
     this.mouseCursor,
     this.overlayColor,
@@ -62,6 +63,11 @@ class SwitchThemeData with Diagnosticable {
   /// If specified, overrides the default value of [Switch.trackOutlineColor].
   final MaterialStateProperty<Color?>? trackOutlineColor;
 
+  /// {@macro flutter.material.switch.trackOutlineWidth}
+  ///
+  /// If specified, overrides the default value of [Switch.trackOutlineWidth].
+  final MaterialStateProperty<double?>? trackOutlineWidth;
+
   /// {@macro flutter.material.switch.materialTapTargetSize}
   ///
   /// If specified, overrides the default value of
@@ -94,6 +100,7 @@ class SwitchThemeData with Diagnosticable {
     MaterialStateProperty<Color?>? thumbColor,
     MaterialStateProperty<Color?>? trackColor,
     MaterialStateProperty<Color?>? trackOutlineColor,
+    MaterialStateProperty<double?>? trackOutlineWidth,
     MaterialTapTargetSize? materialTapTargetSize,
     MaterialStateProperty<MouseCursor?>? mouseCursor,
     MaterialStateProperty<Color?>? overlayColor,
@@ -104,6 +111,7 @@ class SwitchThemeData with Diagnosticable {
       thumbColor: thumbColor ?? this.thumbColor,
       trackColor: trackColor ?? this.trackColor,
       trackOutlineColor: trackOutlineColor ?? this.trackOutlineColor,
+      trackOutlineWidth: trackOutlineWidth ?? this.trackOutlineWidth,
       materialTapTargetSize: materialTapTargetSize ?? this.materialTapTargetSize,
       mouseCursor: mouseCursor ?? this.mouseCursor,
       overlayColor: overlayColor ?? this.overlayColor,
@@ -123,6 +131,7 @@ class SwitchThemeData with Diagnosticable {
       thumbColor: MaterialStateProperty.lerp<Color?>(a?.thumbColor, b?.thumbColor, t, Color.lerp),
       trackColor: MaterialStateProperty.lerp<Color?>(a?.trackColor, b?.trackColor, t, Color.lerp),
       trackOutlineColor: MaterialStateProperty.lerp<Color?>(a?.trackOutlineColor, b?.trackOutlineColor, t, Color.lerp),
+      trackOutlineWidth: MaterialStateProperty.lerp<double?>(a?.trackOutlineWidth, b?.trackOutlineWidth, t, lerpDouble),
       materialTapTargetSize: t < 0.5 ? a?.materialTapTargetSize : b?.materialTapTargetSize,
       mouseCursor: t < 0.5 ? a?.mouseCursor : b?.mouseCursor,
       overlayColor: MaterialStateProperty.lerp<Color?>(a?.overlayColor, b?.overlayColor, t, Color.lerp),
@@ -136,6 +145,7 @@ class SwitchThemeData with Diagnosticable {
     thumbColor,
     trackColor,
     trackOutlineColor,
+    trackOutlineWidth,
     materialTapTargetSize,
     mouseCursor,
     overlayColor,
@@ -155,6 +165,7 @@ class SwitchThemeData with Diagnosticable {
       && other.thumbColor == thumbColor
       && other.trackColor == trackColor
       && other.trackOutlineColor == trackOutlineColor
+      && other.trackOutlineWidth == trackOutlineWidth
       && other.materialTapTargetSize == materialTapTargetSize
       && other.mouseCursor == mouseCursor
       && other.overlayColor == overlayColor
@@ -168,6 +179,7 @@ class SwitchThemeData with Diagnosticable {
     properties.add(DiagnosticsProperty<MaterialStateProperty<Color?>>('thumbColor', thumbColor, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<Color?>>('trackColor', trackColor, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<Color?>>('trackOutlineColor', trackOutlineColor, defaultValue: null));
+    properties.add(DiagnosticsProperty<MaterialStateProperty<double?>>('trackOutlineWidth', trackOutlineWidth, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialTapTargetSize>('materialTapTargetSize', materialTapTargetSize, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<MouseCursor?>>('mouseCursor', mouseCursor, defaultValue: null));
     properties.add(DiagnosticsProperty<MaterialStateProperty<Color?>>('overlayColor', overlayColor, defaultValue: null));

packages/flutter/test/material/switch_test.dart

@@ -2967,6 +2967,141 @@ void main() {
       );
     });
 
+    testWidgets('Track outline width resolves in active/enabled states', (WidgetTester tester) async {
+      const double activeEnabledTrackOutlineWidth = 1.0;
+      const double activeDisabledTrackOutlineWidth = 2.0;
+      const double inactiveEnabledTrackOutlineWidth = 3.0;
+      const double inactiveDisabledTrackOutlineWidth = 4.0;
+
+      double getTrackOutlineWidth(Set<MaterialState> states) {
+        if (states.contains(MaterialState.disabled)) {
+          if (states.contains(MaterialState.selected)) {
+            return activeDisabledTrackOutlineWidth;
+          }
+          return inactiveDisabledTrackOutlineWidth;
+        }
+        if (states.contains(MaterialState.selected)) {
+          return activeEnabledTrackOutlineWidth;
+        }
+        return inactiveEnabledTrackOutlineWidth;
+      }
+
+      final MaterialStateProperty<double> trackOutlineWidth = MaterialStateProperty.resolveWith(getTrackOutlineWidth);
+
+      Widget buildSwitch({required bool enabled, required bool active}) {
+        return MaterialApp(
+          theme: ThemeData(useMaterial3: true),
+          home: Material(
+            child: Center(
+              child: Switch(
+                trackOutlineWidth: trackOutlineWidth,
+                value: active,
+                onChanged: enabled ? (_) { } : null,
+              ),
+            ),
+          ),
+        );
+      }
+
+      await tester.pumpWidget(buildSwitch(enabled: false, active: false));
+
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: inactiveDisabledTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Inactive disabled switch track outline width should be 4.0',
+      );
+
+      await tester.pumpWidget(buildSwitch(enabled: false, active: true));
+      await tester.pumpAndSettle();
+
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: activeDisabledTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Active disabled switch track outline width should be 2.0',
+      );
+
+      await tester.pumpWidget(buildSwitch(enabled: true, active: false));
+      await tester.pumpAndSettle();
+
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: inactiveEnabledTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Inactive enabled switch track outline width should be 3.0',
+      );
+
+      await tester.pumpWidget(buildSwitch(enabled: true, active: true));
+      await tester.pumpAndSettle();
+
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: activeEnabledTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Active enabled switch track outline width should be 1.0',
+      );
+    });
+
+    testWidgets('Switch track outline width resolves in hovered/focused states', (WidgetTester tester) async {
+      final FocusNode focusNode = FocusNode(debugLabel: 'Switch');
+      tester.binding.focusManager.highlightStrategy = FocusHighlightStrategy.alwaysTraditional;
+      const double hoveredTrackOutlineWidth = 4.0;
+      const double focusedTrackOutlineWidth = 6.0;
+
+      double getTrackOutlineWidth(Set<MaterialState> states) {
+        if (states.contains(MaterialState.hovered)) {
+          return hoveredTrackOutlineWidth;
+        }
+        if (states.contains(MaterialState.focused)) {
+          return focusedTrackOutlineWidth;
+        }
+        return 8.0;
+      }
+
+      final MaterialStateProperty<double> trackOutlineWidth = MaterialStateProperty.resolveWith(getTrackOutlineWidth);
+
+      Widget buildSwitch() {
+        return MaterialApp(
+          theme: ThemeData(useMaterial3: true),
+          home: Material(
+            child: Center(
+              child: Switch(
+                focusNode: focusNode,
+                autofocus: true,
+                value: true,
+                trackOutlineWidth: trackOutlineWidth,
+                onChanged: (_) { },
+              ),
+            ),
+          ),
+        );
+      }
+
+      await tester.pumpWidget(buildSwitch());
+      await tester.pumpAndSettle();
+      expect(focusNode.hasPrimaryFocus, isTrue);
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: focusedTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Active enabled switch track outline width should be 6.0',
+      );
+
+      // Start hovering
+      final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
+      await gesture.addPointer();
+      await gesture.moveTo(tester.getCenter(find.byType(Switch)));
+      await tester.pumpAndSettle();
+
+      expect(
+        Material.of(tester.element(find.byType(Switch))),
+        paints..rrect(style: PaintingStyle.fill)
+          ..rrect(strokeWidth: hoveredTrackOutlineWidth, style: PaintingStyle.stroke),
+        reason: 'Active enabled switch track outline width should be 4.0',
+      );
+    });
+
     testWidgets('Switch thumb color is blended against surface color - M3', (WidgetTester tester) async {
       final Color activeDisabledThumbColor = Colors.blue.withOpacity(.60);
       final ThemeData theme = ThemeData.light(useMaterial3: true);

packages/flutter/test/material/switch_theme_test.dart

@@ -25,6 +25,7 @@ void main() {
     expect(themeData.thumbColor, null);
     expect(themeData.trackColor, null);
     expect(themeData.trackOutlineColor, null);
+    expect(themeData.trackOutlineWidth, null);
     expect(themeData.mouseCursor, null);
     expect(themeData.materialTapTargetSize, null);
     expect(themeData.overlayColor, null);
@@ -35,6 +36,7 @@ void main() {
     expect(theme.data.thumbColor, null);
     expect(theme.data.trackColor, null);
     expect(theme.data.trackOutlineColor, null);
+    expect(theme.data.trackOutlineWidth, null);
     expect(theme.data.mouseCursor, null);
     expect(theme.data.materialTapTargetSize, null);
     expect(theme.data.overlayColor, null);
@@ -60,6 +62,7 @@ void main() {
       thumbColor: MaterialStatePropertyAll<Color>(Color(0xfffffff0)),
       trackColor: MaterialStatePropertyAll<Color>(Color(0xfffffff1)),
       trackOutlineColor: MaterialStatePropertyAll<Color>(Color(0xfffffff3)),
+      trackOutlineWidth: MaterialStatePropertyAll<double>(6.0),
       mouseCursor: MaterialStatePropertyAll<MouseCursor>(SystemMouseCursors.click),
       materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
       overlayColor: MaterialStatePropertyAll<Color>(Color(0xfffffff2)),
@@ -75,11 +78,12 @@ void main() {
     expect(description[0], 'thumbColor: MaterialStatePropertyAll(Color(0xfffffff0))');
     expect(description[1], 'trackColor: MaterialStatePropertyAll(Color(0xfffffff1))');
     expect(description[2], 'trackOutlineColor: MaterialStatePropertyAll(Color(0xfffffff3))');
-    expect(description[3], 'materialTapTargetSize: MaterialTapTargetSize.shrinkWrap');
-    expect(description[4], 'mouseCursor: MaterialStatePropertyAll(SystemMouseCursor(click))');
-    expect(description[5], 'overlayColor: MaterialStatePropertyAll(Color(0xfffffff2))');
-    expect(description[6], 'splashRadius: 1.0');
-    expect(description[7], 'thumbIcon: MaterialStatePropertyAll(Icon(IconData(U+0007B)))');
+    expect(description[3], 'trackOutlineWidth: MaterialStatePropertyAll(6.0)');
+    expect(description[4], 'materialTapTargetSize: MaterialTapTargetSize.shrinkWrap');
+    expect(description[5], 'mouseCursor: MaterialStatePropertyAll(SystemMouseCursor(click))');
+    expect(description[6], 'overlayColor: MaterialStatePropertyAll(Color(0xfffffff2))');
+    expect(description[7], 'splashRadius: 1.0');
+    expect(description[8], 'thumbIcon: MaterialStatePropertyAll(Icon(IconData(U+0007B)))');
   });
 
   testWidgets('Switch is themeable', (WidgetTester tester) async {
@@ -91,6 +95,8 @@ void main() {
     const Color selectedTrackColor = Color(0xfffffff3);
     const Color defaultTrackOutlineColor = Color(0xfffffff4);
     const Color selectedTrackOutlineColor = Color(0xfffffff5);
+    const double defaultTrackOutlineWidth = 3.0;
+    const double selectedTrackOutlineWidth = 6.0;
     const MouseCursor mouseCursor = SystemMouseCursors.text;
     const MaterialTapTargetSize materialTapTargetSize = MaterialTapTargetSize.shrinkWrap;
     const Color focusOverlayColor = Color(0xfffffff4);
@@ -119,6 +125,12 @@ void main() {
           }
           return defaultTrackOutlineColor;
         }),
+        trackOutlineWidth: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
+          if (states.contains(MaterialState.selected)) {
+            return selectedTrackOutlineWidth;
+          }
+          return defaultTrackOutlineWidth;
+        }),
         mouseCursor: const MaterialStatePropertyAll<MouseCursor>(mouseCursor),
         materialTapTargetSize: materialTapTargetSize,
         overlayColor: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
@@ -162,13 +174,13 @@ void main() {
       material3
       ? (paints
         ..rrect(color: defaultTrackColor)
-        ..rrect(color: defaultTrackOutlineColor)
+        ..rrect(color: defaultTrackOutlineColor, strokeWidth: defaultTrackOutlineWidth)
         ..rrect(color: defaultThumbColor)
         ..paragraph()
       )
       : (paints
         ..rrect(color: defaultTrackColor)
-        ..rrect(color: defaultTrackOutlineColor)
+        ..rrect(color: defaultTrackOutlineColor, strokeWidth: defaultTrackOutlineWidth)
         ..rrect()
         ..rrect()
         ..rrect()
@@ -186,11 +198,11 @@ void main() {
       material3
       ? (paints
         ..rrect(color: selectedTrackColor)
-        ..rrect(color: selectedTrackOutlineColor)
+        ..rrect(color: selectedTrackOutlineColor, strokeWidth: selectedTrackOutlineWidth)
         ..rrect(color: selectedThumbColor)..paragraph())
       : (paints
         ..rrect(color: selectedTrackColor)
-        ..rrect(color: selectedTrackOutlineColor)
+        ..rrect(color: selectedTrackOutlineColor, strokeWidth: selectedTrackOutlineWidth)
         ..rrect()
         ..rrect()
         ..rrect()
@@ -219,6 +231,8 @@ void main() {
     const Color themeSelectedTrackColor = Color(0xfffffff3);
     const Color themeDefaultOutlineColor = Color(0xfffffff6);
     const Color themeSelectedOutlineColor = Color(0xfffffff7);
+    const double themeDefaultOutlineWidth = 5.0;
+    const double themeSelectedOutlineWidth = 7.0;
     const MouseCursor themeMouseCursor = SystemMouseCursors.click;
     const MaterialTapTargetSize themeMaterialTapTargetSize = MaterialTapTargetSize.padded;
     const Color themeFocusOverlayColor = Color(0xfffffff4);
@@ -231,6 +245,8 @@ void main() {
     const Color selectedTrackColor = Color(0xffffff3f);
     const Color defaultOutlineColor = Color(0xffffff6f);
     const Color selectedOutlineColor = Color(0xffffff7f);
+    const double defaultOutlineWidth = 6.0;
+    const double selectedOutlineWidth = 8.0;
     const MouseCursor mouseCursor = SystemMouseCursors.text;
     const MaterialTapTargetSize materialTapTargetSize = MaterialTapTargetSize.shrinkWrap;
     const Color focusColor = Color(0xffffff4f);
@@ -257,6 +273,12 @@ void main() {
           }
           return themeDefaultOutlineColor;
         }),
+        trackOutlineWidth: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
+          if (states.contains(MaterialState.selected)) {
+            return themeSelectedOutlineWidth;
+          }
+          return themeDefaultOutlineWidth;
+        }),
         mouseCursor: const MaterialStatePropertyAll<MouseCursor>(themeMouseCursor),
         materialTapTargetSize: themeMaterialTapTargetSize,
         overlayColor: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
@@ -305,6 +327,12 @@ void main() {
               }
               return defaultOutlineColor;
             }),
+            trackOutlineWidth: MaterialStateProperty.resolveWith((Set<MaterialState> states) {
+              if (states.contains(MaterialState.selected)) {
+                return selectedOutlineWidth;
+              }
+              return defaultOutlineWidth;
+            }),
             mouseCursor: mouseCursor,
             materialTapTargetSize: materialTapTargetSize,
             focusColor: focusColor,
@@ -329,11 +357,11 @@ void main() {
       material3
       ? (paints
         ..rrect(color: defaultTrackColor)
-        ..rrect(color: defaultOutlineColor)
+        ..rrect(color: defaultOutlineColor, strokeWidth: defaultOutlineWidth)
         ..rrect(color: defaultThumbColor)..paragraph(offset: const Offset(12, 16)))
       : (paints
         ..rrect(color: defaultTrackColor)
-        ..rrect(color: defaultOutlineColor)
+        ..rrect(color: defaultOutlineColor, strokeWidth: defaultOutlineWidth)
         ..rrect()
         ..rrect()
         ..rrect()
@@ -349,11 +377,11 @@ void main() {
       _getSwitchMaterial(tester),
       material3
       ? (paints
-        ..rrect(color: selectedTrackColor)..rrect(color: selectedOutlineColor)
+        ..rrect(color: selectedTrackColor)..rrect(color: selectedOutlineColor, strokeWidth: selectedOutlineWidth)
         ..rrect(color: selectedThumbColor))
       : (paints
         ..rrect(color: selectedTrackColor)
-        ..rrect(color: selectedOutlineColor)
+        ..rrect(color: selectedOutlineColor, strokeWidth: selectedOutlineWidth)
         ..rrect()
         ..rrect()
         ..rrect()
@@ -534,15 +562,18 @@ void main() {
     const Color globalThemeThumbColor = Color(0xfffffff1);
     const Color globalThemeTrackColor = Color(0xfffffff2);
     const Color globalThemeOutlineColor = Color(0xfffffff3);
+    const double globalThemeOutlineWidth = 6.0;
     const Color localThemeThumbColor = Color(0xffff0000);
     const Color localThemeTrackColor = Color(0xffff0000);
     const Color localThemeOutlineColor = Color(0xffff0000);
+    const double localThemeOutlineWidth = 4.0;
 
     final ThemeData themeData = ThemeData(
       switchTheme: const SwitchThemeData(
         thumbColor: MaterialStatePropertyAll<Color>(globalThemeThumbColor),
         trackColor: MaterialStatePropertyAll<Color>(globalThemeTrackColor),
         trackOutlineColor: MaterialStatePropertyAll<Color>(globalThemeOutlineColor),
+        trackOutlineWidth: MaterialStatePropertyAll<double>(globalThemeOutlineWidth),
       ),
     );
     final bool material3 = themeData.useMaterial3;
@@ -555,6 +586,7 @@ void main() {
               thumbColor: MaterialStatePropertyAll<Color>(localThemeThumbColor),
               trackColor: MaterialStatePropertyAll<Color>(localThemeTrackColor),
               trackOutlineColor: MaterialStatePropertyAll<Color>(localThemeOutlineColor),
+              trackOutlineWidth: MaterialStatePropertyAll<double>(localThemeOutlineWidth)
             ),
             child: Switch(
               value: selected,
@@ -573,11 +605,11 @@ void main() {
       material3
       ? (paints
         ..rrect(color: localThemeTrackColor)
-        ..rrect(color: localThemeOutlineColor)
+        ..rrect(color: localThemeOutlineColor, strokeWidth: localThemeOutlineWidth)
         ..rrect(color: localThemeThumbColor))
       : (paints
         ..rrect(color: localThemeTrackColor)
-        ..rrect(color: localThemeOutlineColor)
+        ..rrect(color: localThemeOutlineColor, strokeWidth: localThemeOutlineWidth)
         ..rrect()
         ..rrect()
         ..rrect()