flutter · goderbauer · Apr 14, 2022 · Apr 13, 2022
diff --git a/packages/flutter/lib/src/animation/tween.dart b/packages/flutter/lib/src/animation/tween.dart
@@ -368,7 +368,7 @@ class ColorTween extends Tween<Color?> {
   /// or [end] if you want the effect of fading in or out of transparent.
   /// Instead prefer null. [Colors.transparent] refers to black transparent and
   /// thus will fade out of or into black which is likely unwanted.
-  ColorTween({ Color? begin, Color? end }) : super(begin: begin, end: end);
+  ColorTween({ super.begin, super.end });
 
   /// Returns the value this variable has at the given animation clock value.
   @override
@@ -388,7 +388,7 @@ class SizeTween extends Tween<Size?> {
   ///
   /// The [begin] and [end] properties may be null; the null value
   /// is treated as an empty size.
-  SizeTween({ Size? begin, Size? end }) : super(begin: begin, end: end);
+  SizeTween({ super.begin, super.end });
 
   /// Returns the value this variable has at the given animation clock value.
   @override
@@ -409,7 +409,7 @@ class RectTween extends Tween<Rect?> {
   ///
   /// The [begin] and [end] properties may be null; the null value
   /// is treated as an empty rect at the top left corner.
-  RectTween({ Rect? begin, Rect? end }) : super(begin: begin, end: end);
+  RectTween({ super.begin, super.end });
 
   /// Returns the value this variable has at the given animation clock value.
   @override
@@ -436,7 +436,7 @@ class IntTween extends Tween<int> {
   /// The [begin] and [end] properties must be non-null before the tween is
   /// first used, but the arguments can be null if the values are going to be
   /// filled in later.
-  IntTween({ int? begin, int? end }) : super(begin: begin, end: end);
+  IntTween({ super.begin, super.end });
 
   // The inherited lerp() function doesn't work with ints because it multiplies
   // the begin and end types by a double, and int * double returns a double.
@@ -464,7 +464,7 @@ class StepTween extends Tween<int> {
   /// The [begin] and [end] properties must be non-null before the tween is
   /// first used, but the arguments can be null if the values are going to be
   /// filled in later.
-  StepTween({ int? begin, int? end }) : super(begin: begin, end: end);
+  StepTween({ super.begin, super.end });
 
   // The inherited lerp() function doesn't work with ints because it multiplies
   // the begin and end types by a double, and int * double returns a double.

diff --git a/packages/flutter/lib/src/animation/tween_sequence.dart b/packages/flutter/lib/src/animation/tween_sequence.dart
@@ -110,9 +110,8 @@ class FlippedTweenSequence extends TweenSequence<double> {
   /// There's a small cost associated with building a `TweenSequence` so it's
   /// best to reuse one, rather than rebuilding it on every frame, when that's
   /// possible.
-  FlippedTweenSequence(List<TweenSequenceItem<double>> items)
-    : assert(items != null),
-      super(items);
+  FlippedTweenSequence(super.items)
+    : assert(items != null);
 
   @override
   double transform(double t) => 1 - super.transform(1 - t);

diff --git a/packages/flutter/lib/src/cupertino/activity_indicator.dart b/packages/flutter/lib/src/cupertino/activity_indicator.dart
@@ -26,15 +26,14 @@ const Color _kActiveTickColor = CupertinoDynamicColor.withBrightness(
 class CupertinoActivityIndicator extends StatefulWidget {
   /// Creates an iOS-style activity indicator that spins clockwise.
   const CupertinoActivityIndicator({
-    Key? key,
+    super.key,
     this.color,
     this.animating = true,
     this.radius = _kDefaultIndicatorRadius,
   })  : assert(animating != null),
         assert(radius != null),
         assert(radius > 0.0),
-        progress = 1.0,
-        super(key: key);
+        progress = 1.0;
 
   /// Creates a non-animated iOS-style activity indicator that displays
   /// a partial count of ticks based on the value of [progress].
@@ -43,7 +42,7 @@ class CupertinoActivityIndicator extends StatefulWidget {
   /// will be shown) and 1.0 (all ticks will be shown) inclusive. Defaults
   /// to 1.0.
   const CupertinoActivityIndicator.partiallyRevealed({
-    Key? key,
+    super.key,
     this.color,
     this.radius = _kDefaultIndicatorRadius,
     this.progress = 1.0,
@@ -52,8 +51,7 @@ class CupertinoActivityIndicator extends StatefulWidget {
         assert(progress != null),
         assert(progress >= 0.0),
         assert(progress <= 1.0),
-        animating = false,
-        super(key: key);
+        animating = false;
 
   /// Color of the activity indicator.
   ///

diff --git a/packages/flutter/lib/src/cupertino/app.dart b/packages/flutter/lib/src/cupertino/app.dart
@@ -148,7 +148,7 @@ class CupertinoApp extends StatefulWidget {
   ///
   /// The boolean arguments, [routes], and [navigatorObservers], must not be null.
   const CupertinoApp({
-    Key? key,
+    super.key,
     this.navigatorKey,
     this.home,
     this.theme,
@@ -188,12 +188,11 @@ class CupertinoApp extends StatefulWidget {
        routeInformationProvider = null,
        routeInformationParser = null,
        routerDelegate = null,
-       backButtonDispatcher = null,
-       super(key: key);
+       backButtonDispatcher = null;
 
   /// Creates a [CupertinoApp] that uses the [Router] instead of a [Navigator].
   const CupertinoApp.router({
-    Key? key,
+    super.key,
     this.routeInformationProvider,
     required RouteInformationParser<Object> this.routeInformationParser,
     required RouterDelegate<Object> this.routerDelegate,
@@ -231,8 +230,7 @@ class CupertinoApp extends StatefulWidget {
        onGenerateInitialRoutes = null,
        onUnknownRoute = null,
        routes = null,
-       initialRoute = null,
-       super(key: key);
+       initialRoute = null;
 
   /// {@macro flutter.widgets.widgetsApp.navigatorKey}
   final GlobalKey<NavigatorState>? navigatorKey;

diff --git a/packages/flutter/lib/src/cupertino/bottom_tab_bar.dart b/packages/flutter/lib/src/cupertino/bottom_tab_bar.dart
@@ -58,7 +58,7 @@ const Color _kDefaultTabBarInactiveColor = CupertinoColors.inactiveGray;
 class CupertinoTabBar extends StatelessWidget implements PreferredSizeWidget {
   /// Creates a tab bar in the iOS style.
   const CupertinoTabBar({
-    Key? key,
+    super.key,
     required this.items,
     this.onTap,
     this.currentIndex = 0,
@@ -82,8 +82,7 @@ class CupertinoTabBar extends StatelessWidget implements PreferredSizeWidget {
        assert(0 <= currentIndex && currentIndex < items.length),
        assert(iconSize != null),
        assert(height != null && height >= 0.0),
-       assert(inactiveColor != null),
-       super(key: key);
+       assert(inactiveColor != null);
 
   /// The interactive items laid out within the bottom navigation bar.
   ///

diff --git a/packages/flutter/lib/src/cupertino/button.dart b/packages/flutter/lib/src/cupertino/button.dart
@@ -39,7 +39,7 @@ const EdgeInsets _kBackgroundButtonPadding = EdgeInsets.symmetric(
 class CupertinoButton extends StatefulWidget {
   /// Creates an iOS-style button.
   const CupertinoButton({
-    Key? key,
+    super.key,
     required this.child,
     this.padding,
     this.color,
@@ -52,8 +52,7 @@ class CupertinoButton extends StatefulWidget {
   }) : assert(pressedOpacity == null || (pressedOpacity >= 0.0 && pressedOpacity <= 1.0)),
        assert(disabledColor != null),
        assert(alignment != null),
-       _filled = false,
-       super(key: key);
+       _filled = false;
 
   /// Creates an iOS-style button with a filled background.
   ///
@@ -62,7 +61,7 @@ class CupertinoButton extends StatefulWidget {
   /// To specify a custom background color, use the [color] argument of the
   /// default constructor.
   const CupertinoButton.filled({
-    Key? key,
+    super.key,
     required this.child,
     this.padding,
     this.disabledColor = CupertinoColors.quaternarySystemFill,
@@ -75,8 +74,7 @@ class CupertinoButton extends StatefulWidget {
        assert(disabledColor != null),
        assert(alignment != null),
        color = null,
-       _filled = true,
-       super(key: key);
+       _filled = true;
 
   /// The widget below this widget in the tree.
   ///

diff --git a/packages/flutter/lib/src/cupertino/context_menu.dart b/packages/flutter/lib/src/cupertino/context_menu.dart
@@ -98,13 +98,12 @@ class CupertinoContextMenu extends StatefulWidget {
   ///
   /// [child] is required and cannot be null.
   CupertinoContextMenu({
-    Key? key,
+    super.key,
     required this.actions,
     required this.child,
     this.previewBuilder,
   }) : assert(actions != null && actions.isNotEmpty),
-       assert(child != null),
-       super(key: key);
+       assert(child != null);
 
   /// The widget that can be "opened" with the [CupertinoContextMenu].
   ///
@@ -403,12 +402,11 @@ class _CupertinoContextMenuState extends State<CupertinoContextMenu> with Ticker
 // siblings of the original child.
 class _DecoyChild extends StatefulWidget {
   const _DecoyChild({
-    Key? key,
     this.beginRect,
     required this.controller,
     this.endRect,
     this.child,
-  }) : super(key: key);
+  });
 
   final Rect? beginRect;
   final AnimationController controller;
@@ -521,19 +519,15 @@ class _ContextMenuRoute<T> extends PopupRoute<T> {
     required _ContextMenuLocation contextMenuLocation,
     this.barrierLabel,
     _ContextMenuPreviewBuilderChildless? builder,
-    ui.ImageFilter? filter,
+    super.filter,
     required Rect previousChildRect,
-    RouteSettings? settings,
+    super.settings,
   }) : assert(actions != null && actions.isNotEmpty),
        assert(contextMenuLocation != null),
        _actions = actions,
        _builder = builder,
        _contextMenuLocation = contextMenuLocation,
-       _previousChildRect = previousChildRect,
-       super(
-         filter: filter,
-         settings: settings,
-       );
+       _previousChildRect = previousChildRect;
 
   // Barrier color for a Cupertino modal barrier.
   static const Color _kModalBarrierColor = Color(0x6604040F);
@@ -812,7 +806,6 @@ class _ContextMenuRoute<T> extends PopupRoute<T> {
 // animating out.
 class _ContextMenuRouteStatic extends StatefulWidget {
   const _ContextMenuRouteStatic({
-    Key? key,
     this.actions,
     required this.child,
     this.childGlobalKey,
@@ -821,8 +814,7 @@ class _ContextMenuRouteStatic extends StatefulWidget {
     required this.orientation,
     this.sheetGlobalKey,
   }) : assert(contextMenuLocation != null),
-       assert(orientation != null),
-       super(key: key);
+       assert(orientation != null);
 
   final List<Widget>? actions;
   final Widget child;
@@ -1145,16 +1137,15 @@ class _ContextMenuRouteStaticState extends State<_ContextMenuRouteStatic> with T
 // list of actions that are typically CupertinoContextMenuActions.
 class _ContextMenuSheet extends StatelessWidget {
   _ContextMenuSheet({
-    Key? key,
+    super.key,
     required this.actions,
     required _ContextMenuLocation contextMenuLocation,
     required Orientation orientation,
   }) : assert(actions != null && actions.isNotEmpty),
        assert(contextMenuLocation != null),
        assert(orientation != null),
        _contextMenuLocation = contextMenuLocation,
-       _orientation = orientation,
-       super(key: key);
+       _orientation = orientation;
 
   final List<Widget> actions;
   final _ContextMenuLocation _contextMenuLocation;

diff --git a/packages/flutter/lib/src/cupertino/context_menu_action.dart b/packages/flutter/lib/src/cupertino/context_menu_action.dart
@@ -14,16 +14,15 @@ import 'colors.dart';
 class CupertinoContextMenuAction extends StatefulWidget {
   /// Construct a CupertinoContextMenuAction.
   const CupertinoContextMenuAction({
-    Key? key,
+    super.key,
     required this.child,
     this.isDefaultAction = false,
     this.isDestructiveAction = false,
     this.onPressed,
     this.trailingIcon,
   }) : assert(child != null),
        assert(isDefaultAction != null),
-       assert(isDestructiveAction != null),
-       super(key: key);
+       assert(isDestructiveAction != null);
 
   /// The widget that will be placed inside the action.
   final Widget child;

diff --git a/packages/flutter/lib/src/cupertino/date_picker.dart b/packages/flutter/lib/src/cupertino/date_picker.dart
@@ -259,7 +259,7 @@ class CupertinoDatePicker extends StatefulWidget {
   /// [dateOrder] determines the order of the columns inside [CupertinoDatePicker] in date mode.
   /// Defaults to the locale's default date format/order.
   CupertinoDatePicker({
-    Key? key,
+    super.key,
     this.mode = CupertinoDatePickerMode.dateAndTime,
     required this.onDateTimeChanged,
     DateTime? initialDateTime,
@@ -278,8 +278,7 @@ class CupertinoDatePicker extends StatefulWidget {
        assert(
          minuteInterval > 0 && 60 % minuteInterval == 0,
          'minute interval is not a positive integer factor of 60',
-       ),
-       super(key: key) {
+       ) {
     assert(this.initialDateTime != null);
     assert(
       mode != CupertinoDatePickerMode.dateAndTime || minimumDate == null || !this.initialDateTime.isBefore(minimumDate!),
@@ -1525,7 +1524,7 @@ class CupertinoTimerPicker extends StatefulWidget {
   /// [secondInterval] is the granularity of the second spinner. Must be a
   /// positive integer factor of 60.
   CupertinoTimerPicker({
-    Key? key,
+    super.key,
     this.mode = CupertinoTimerPickerMode.hms,
     this.initialTimerDuration = Duration.zero,
     this.minuteInterval = 1,
@@ -1541,8 +1540,7 @@ class CupertinoTimerPicker extends StatefulWidget {
        assert(secondInterval > 0 && 60 % secondInterval == 0),
        assert(initialTimerDuration.inMinutes % minuteInterval == 0),
        assert(initialTimerDuration.inSeconds % secondInterval == 0),
-       assert(alignment != null),
-       super(key: key);
+       assert(alignment != null);
 
   /// The mode of the timer picker.
   final CupertinoTimerPickerMode mode;

diff --git a/packages/flutter/lib/src/cupertino/desktop_text_selection.dart b/packages/flutter/lib/src/cupertino/desktop_text_selection.dart
@@ -91,7 +91,6 @@ final TextSelectionControls cupertinoDesktopTextSelectionControls =
 // Generates the child that's passed into CupertinoDesktopTextSelectionToolbar.
 class _CupertinoDesktopTextSelectionControlsToolbar extends StatefulWidget {
   const _CupertinoDesktopTextSelectionControlsToolbar({
-    Key? key,
     required this.clipboardStatus,
     required this.endpoints,
     required this.globalEditableRegion,
@@ -102,7 +101,7 @@ class _CupertinoDesktopTextSelectionControlsToolbar extends StatefulWidget {
     required this.selectionMidpoint,
     required this.textLineHeight,
     required this.lastSecondaryTapDownPosition,
-  }) : super(key: key);
+  });
 
   final ClipboardStatusNotifier? clipboardStatus;
   final List<TextSelectionPoint> endpoints;
@@ -228,11 +227,9 @@ class _CupertinoDesktopTextSelectionControlsToolbarState extends State<_Cupertin
 class _CupertinoDesktopTextSelectionToolbar extends StatelessWidget {
   /// Creates an instance of CupertinoTextSelectionToolbar.
   const _CupertinoDesktopTextSelectionToolbar({
-    Key? key,
     required this.anchor,
     required this.children,
-  }) : assert(children.length > 0),
-       super(key: key);
+  }) : assert(children.length > 0);
 
   /// The point at which the toolbar will attempt to position itself as closely
   /// as possible.
@@ -318,15 +315,13 @@ const EdgeInsets _kToolbarButtonPadding = EdgeInsets.fromLTRB(
 class _CupertinoDesktopTextSelectionToolbarButton extends StatefulWidget {
   /// Creates an instance of CupertinoDesktopTextSelectionToolbarButton.
   const _CupertinoDesktopTextSelectionToolbarButton({
-    Key? key,
     required this.onPressed,
     required this.child,
-  }) : super(key: key);
+  });
 
   /// Create an instance of [CupertinoDesktopTextSelectionToolbarButton] whose child is
   /// a [Text] widget styled like the default Mac context menu button.
   _CupertinoDesktopTextSelectionToolbarButton.text({
-    Key? key,
     required BuildContext context,
     required this.onPressed,
     required String text,
@@ -339,8 +334,7 @@ class _CupertinoDesktopTextSelectionToolbarButton extends StatefulWidget {
              darkColor: CupertinoColors.white,
            ).resolveFrom(context),
          ),
-       ),
-       super(key: key);
+       );
 
   /// {@macro flutter.cupertino.CupertinoTextSelectionToolbarButton.onPressed}
   final VoidCallback onPressed;