AppBar draws its defaults from theme.colorScheme (#69251)

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

@@ -11,6 +11,7 @@ import 'package:flutter/widgets.dart';
 
 import 'app_bar_theme.dart';
 import 'back_button.dart';
+import 'color_scheme.dart';
 import 'constants.dart';
 import 'debug.dart';
 import 'flexible_space_bar.dart';
@@ -196,6 +197,7 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
     this.shadowColor,
     this.shape,
     this.backgroundColor,
+    this.foregroundColor,
     this.brightness,
     this.iconTheme,
     this.actionsIconTheme,
@@ -357,20 +359,68 @@ class AppBar extends StatefulWidget implements PreferredSizeWidget {
   /// zero.
   final ShapeBorder? shape;
 
-  /// The color to use for the app bar's material. Typically this should be set
-  /// along with [brightness], [iconTheme], [textTheme].
+  /// The fill color to use for the app bar's [Material].
   ///
-  /// If this property is null, then [AppBarTheme.color] of
-  /// [ThemeData.appBarTheme] is used. If that is also null, then
-  /// [ThemeData.primaryColor] is used.
+  /// If null, then the [AppBarTheme.color] is used. If that value is also
+  /// null, then [AppBar] uses the overall theme's [ColorScheme.primary] if the
+  /// overall theme's brightness is [Brightness.light], and [ColorScheme.surface]
+  /// if the overall theme's [brightness] is [Brightness.dark].
+  ///
+  /// See also:
+  ///
+  ///  * [foregroundColor], which specifies the color for icons and text within
+  ///    the app bar.
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
   final Color? backgroundColor;
 
-  /// The brightness of the app bar's material. Typically this is set along
-  /// with [backgroundColor], [iconTheme], [textTheme].
+  /// The default color for [Text] and [Icon]s within the app bar.
   ///
-  /// If this property is null, then [AppBarTheme.brightness] of
-  /// [ThemeData.appBarTheme] is used. If that is also null, then
-  /// [ThemeData.primaryColorBrightness] is used.
+  /// If null, then [AppBarTheme.foregroundColor] is used. If that
+  /// value is also null, then [AppBar] uses the overall theme's
+  /// [ColorScheme.onPrimary] if the overall theme's brightness is
+  /// [Brightness.light], and [ColorScheme.onSurface] if the overall
+  /// theme's [brightness] is [Brightness.dark].
+  ///
+  /// This color is used to configure [DefaultTextStyle] that contains
+  /// the app bar's children, and the default [IconTheme] widgets that
+  /// are created if [iconTheme] and [actionsIconTheme] are null.
+  ///
+  /// See also:
+  ///
+  ///  * [backgroundColor], which specifies the app bar's background color.
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
+  final Color? foregroundColor;
+
+  /// Determines the brightness of the [SystemUiOverlayStyle]: for
+  /// [Brightness.dark], [SystemUiOverlayStyle.light] is used and fo
+  /// [Brightness.light], [SystemUiOverlayStyle.dark] is used.
+  ///
+  /// If this value is null then [AppBarTheme.brightness] is used
+  /// and if that's null then overall theme's brightness is used.
+  ///
+  /// The AppBar is built within a `AnnotatedRegion<SystemUiOverlayStyle>`
+  /// which causes [SystemChrome.setSystemUIOverlayStyle] to be called
+  /// automatically.  Apps should not enclose the AppBar with
+  /// their own [AnnotatedRegion].
+  ///
+  /// See also:
+  ///
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
   final Brightness? brightness;
 
   /// The color, opacity, and size to use for app bar icons. Typically this
@@ -499,6 +549,7 @@ class _AppBarState extends State<AppBar> {
     assert(!widget.primary || debugCheckHasMediaQuery(context));
     assert(debugCheckHasMaterialLocalizations(context));
     final ThemeData theme = Theme.of(context);
+    final ColorScheme colorScheme = theme.colorScheme;
     final AppBarTheme appBarTheme = AppBarTheme.of(context);
     final ScaffoldState? scaffold = Scaffold.maybeOf(context);
     final ModalRoute<dynamic>? parentRoute = ModalRoute.of(context);
@@ -510,18 +561,25 @@ class _AppBarState extends State<AppBar> {
 
     final double toolbarHeight = widget.toolbarHeight ?? kToolbarHeight;
 
+    final Color backgroundColor = widget.backgroundColor
+      ?? appBarTheme.color
+      ?? (colorScheme.brightness == Brightness.dark ? colorScheme.surface : colorScheme.primary);
+    final Color foregroundColor = widget.foregroundColor
+      ?? appBarTheme.foregroundColor
+      ?? (colorScheme.brightness == Brightness.dark ? colorScheme.onSurface : colorScheme.onPrimary);
+
     IconThemeData overallIconTheme = widget.iconTheme
       ?? appBarTheme.iconTheme
-      ?? theme.primaryIconTheme;
+      ?? theme.iconTheme.copyWith(color: foregroundColor);
     IconThemeData actionsIconTheme = widget.actionsIconTheme
       ?? appBarTheme.actionsIconTheme
       ?? overallIconTheme;
     TextStyle? centerStyle = widget.textTheme?.headline6
       ?? appBarTheme.textTheme?.headline6
-      ?? theme.primaryTextTheme.headline6;
+      ?? theme.primaryTextTheme.headline6?.copyWith(color: foregroundColor);
     TextStyle? sideStyle = widget.textTheme?.bodyText2
       ?? appBarTheme.textTheme?.bodyText2
-      ?? theme.primaryTextTheme.bodyText2;
+      ?? theme.primaryTextTheme.bodyText2?.copyWith(color: foregroundColor);
 
     if (widget.toolbarOpacity != 1.0) {
       final double opacity = const Interval(0.25, 1.0, curve: Curves.fastOutSlowIn).transform(widget.toolbarOpacity);
@@ -530,10 +588,10 @@ class _AppBarState extends State<AppBar> {
       if (sideStyle?.color != null)
         sideStyle = sideStyle!.copyWith(color: sideStyle.color!.withOpacity(opacity));
       overallIconTheme = overallIconTheme.copyWith(
-        opacity: opacity * (overallIconTheme.opacity ?? 1.0)
+        opacity: opacity * (overallIconTheme.opacity ?? 1.0),
       );
       actionsIconTheme = actionsIconTheme.copyWith(
-        opacity: opacity * (actionsIconTheme.opacity ?? 1.0)
+        opacity: opacity * (actionsIconTheme.opacity ?? 1.0),
       );
     }
 
@@ -707,21 +765,19 @@ class _AppBarState extends State<AppBar> {
         ],
       );
     }
+
     final Brightness brightness = widget.brightness
       ?? appBarTheme.brightness
-      ?? theme.primaryColorBrightness;
+      ?? colorScheme.brightness;
     final SystemUiOverlayStyle overlayStyle = brightness == Brightness.dark
       ? SystemUiOverlayStyle.light
       : SystemUiOverlayStyle.dark;
-
     return Semantics(
       container: true,
       child: AnnotatedRegion<SystemUiOverlayStyle>(
         value: overlayStyle,
         child: Material(
-          color: widget.backgroundColor
-            ?? appBarTheme.color
-            ?? theme.primaryColor,
+          color: backgroundColor,
           elevation: widget.elevation
             ?? appBarTheme.elevation
             ?? _defaultElevation,

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

@@ -33,6 +33,7 @@ class AppBarTheme with Diagnosticable {
   const AppBarTheme({
     this.brightness,
     this.color,
+    this.foregroundColor,
     this.elevation,
     this.shadowColor,
     this.iconTheme,
@@ -42,16 +43,66 @@ class AppBarTheme with Diagnosticable {
     this.titleSpacing,
   });
 
-  /// Default value for [AppBar.brightness].
+  /// AppBar uses this value to determine the default (background) [color] and
+  /// [foregroundColor] as well as the app bar's [SystemUiOverlayStyle].
   ///
-  /// If null, [AppBar] uses [ThemeData.primaryColorBrightness].
+  /// For [Brightness.dark], [SystemUiOverlayStyle.light] is used and for
+  /// [Brightness.light], [SystemUiOverlayStyle.dark] is used.
+  ///
+  /// See also:
+  ///
+  ///  * [AppBar.brightness], which overrides the this value and the overall
+  ///    theme's [ColorScheme.brightness].
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
   final Brightness? brightness;
 
-  /// Default value for [AppBar.backgroundColor].
+  /// The app bar's background color.
+  ///
+  /// If null, [AppBar] uses the overall theme's [ColorScheme.primary] if the
+  /// overall theme's brightness is [Brightness.light], and [ColorScheme.surface]
+  /// if the overall theme's [brightness] is [Brightness.dark].
   ///
-  /// If null, [AppBar] uses [ThemeData.primaryColor].
+  /// See also:
+  ///
+  ///  * [AppBar.backgroundColor], which specifies the AppBar's background color
+  ///    and overrides the background color defined by this theme.
+  ///  * [foregroundColor], which specifies the color for icons and text within
+  ///    the app bar.
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
   final Color? color;
 
+  /// The default color for [Text] and [Icon]s within the app bar.
+  ///
+  /// If null, [AppBar] uses the overall theme's [ColorScheme.onPrimary] if the
+  /// overall theme's brightness is [Brightness.light], and [ColorScheme.onSurface]
+  /// if the overall theme's [brightness] is [Brightness.dark].
+  ///
+  /// This color is used to configure [DefaultTextStyle] and [IconTheme]
+  /// widgets.
+  ///
+  /// See also:
+  ///
+  ///  * [AppBar.foregroundColor], which specifies the app bar's text and icon
+  ///    colors and overrides the foreground color defined by this theme.
+  ///  * [color], which specifies the app bar's background color.
+  ///  * [Theme.of], which returns the current overall Material theme as
+  ///    a [ThemeData].
+  ///  * [ThemeData.colorScheme], the thirteen colors that most Material widget
+  ///    default colors are based on.
+  ///  * [ColorScheme.brightness], which indicates if the overall [Theme]
+  ///    is light or dark.
+  final Color? foregroundColor;
+
   /// Default value for [AppBar.elevation].
   ///
   /// If null, [AppBar] uses a default value of 4.0.
@@ -93,6 +144,7 @@ class AppBarTheme with Diagnosticable {
     IconThemeData? actionsIconTheme,
     Brightness? brightness,
     Color? color,
+    Color? foregroundColor,
     double? elevation,
     Color? shadowColor,
     IconThemeData? iconTheme,
@@ -103,6 +155,7 @@ class AppBarTheme with Diagnosticable {
     return AppBarTheme(
       brightness: brightness ?? this.brightness,
       color: color ?? this.color,
+      foregroundColor: foregroundColor ?? this.foregroundColor,
       elevation: elevation ?? this.elevation,
       shadowColor: shadowColor ?? this.shadowColor,
       iconTheme: iconTheme ?? this.iconTheme,
@@ -128,6 +181,7 @@ class AppBarTheme with Diagnosticable {
     return AppBarTheme(
       brightness: t < 0.5 ? a?.brightness : b?.brightness,
       color: Color.lerp(a?.color, b?.color, t),
+      foregroundColor: Color.lerp(a?.foregroundColor, b?.foregroundColor, t),
       elevation: lerpDouble(a?.elevation, b?.elevation, t),
       shadowColor: Color.lerp(a?.shadowColor, b?.shadowColor, t),
       iconTheme: IconThemeData.lerp(a?.iconTheme, b?.iconTheme, t),
@@ -143,6 +197,7 @@ class AppBarTheme with Diagnosticable {
     return hashValues(
       brightness,
       color,
+      foregroundColor,
       elevation,
       shadowColor,
       iconTheme,
@@ -162,6 +217,7 @@ class AppBarTheme with Diagnosticable {
     return other is AppBarTheme
         && other.brightness == brightness
         && other.color == color
+        && other.foregroundColor == foregroundColor
         && other.elevation == elevation
         && other.shadowColor == shadowColor
         && other.iconTheme == iconTheme
@@ -176,6 +232,7 @@ class AppBarTheme with Diagnosticable {
     super.debugFillProperties(properties);
     properties.add(DiagnosticsProperty<Brightness>('brightness', brightness, defaultValue: null));
     properties.add(ColorProperty('color', color, defaultValue: null));
+    properties.add(ColorProperty('foregroundColor', foregroundColor, defaultValue: null));
     properties.add(DiagnosticsProperty<double>('elevation', elevation, defaultValue: null));
     properties.add(ColorProperty('shadowColor', shadowColor, defaultValue: null));
     properties.add(DiagnosticsProperty<IconThemeData>('iconTheme', iconTheme, defaultValue: null));

packages/flutter/test/material/app_bar_test.dart

@@ -1769,6 +1769,7 @@ void main() {
     ));
 
     expect(darkTheme.primaryColorBrightness, Brightness.dark);
+    expect(darkTheme.colorScheme.brightness, Brightness.dark);
     expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
       statusBarBrightness: Brightness.dark,
       statusBarIconBrightness: Brightness.light,
@@ -1777,14 +1778,17 @@ void main() {
 
   testWidgets('AppBar draws a dark system bar for a light background', (WidgetTester tester) async {
     final ThemeData lightTheme = ThemeData(primaryColor: Colors.white);
-    await tester.pumpWidget(MaterialApp(
-      theme: lightTheme,
-      home: Scaffold(
-        appBar: AppBar(title: const Text('test')),
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: lightTheme,
+        home: Scaffold(
+          appBar: AppBar(title: const Text('test')),
+        ),
       ),
-    ));
+    );
 
     expect(lightTheme.primaryColorBrightness, Brightness.light);
+    expect(lightTheme.colorScheme.brightness, Brightness.light);
     expect(SystemChrome.latestStyle, const SystemUiOverlayStyle(
       statusBarBrightness: Brightness.light,
       statusBarIconBrightness: Brightness.dark,

packages/flutter/test/material/app_bar_theme_test.dart

@@ -29,7 +29,7 @@ void main() {
     final RichText actionIconText = _getAppBarIconRichText(tester);
     final DefaultTextStyle text = _getAppBarText(tester);
 
-    expect(SystemChrome.latestStyle!.statusBarBrightness, Brightness.dark);
+    expect(SystemChrome.latestStyle!.statusBarBrightness, SystemUiOverlayStyle.dark.statusBarBrightness);
     expect(widget.color, Colors.blue);
     expect(widget.elevation, 4.0);
     expect(widget.shadowColor, Colors.black);
@@ -77,23 +77,25 @@ void main() {
     const IconThemeData actionsIconThemeData = IconThemeData(color: Colors.lightBlue);
     const TextTheme textTheme = TextTheme(headline6: TextStyle(color: Colors.orange), bodyText2: TextStyle(color: Colors.pink));
 
-    final ThemeData themeData = _themeData().copyWith(appBarTheme: _appBarTheme());
-
-    await tester.pumpWidget(MaterialApp(
-      theme: themeData,
-      home: Scaffold(appBar: AppBar(
-        backgroundColor: color,
-        brightness: brightness,
-        elevation: elevation,
-        shadowColor: shadowColor,
-        iconTheme: iconThemeData,
-        actionsIconTheme: actionsIconThemeData,
-        textTheme: textTheme,
-        actions: <Widget>[
-          IconButton(icon: const Icon(Icons.share), onPressed: () { }),
-        ],
-      )),
-    ));
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData.from(colorScheme: const ColorScheme.light()),
+        home: Scaffold(
+          appBar: AppBar(
+            backgroundColor: color,
+            brightness: brightness,
+            elevation: elevation,
+            shadowColor: shadowColor,
+            iconTheme: iconThemeData,
+            actionsIconTheme: actionsIconThemeData,
+            textTheme: textTheme,
+            actions: <Widget>[
+              IconButton(icon: const Icon(Icons.share), onPressed: () { }),
+            ],
+          ),
+        ),
+      ),
+    );
 
     final Material widget = _getAppBarMaterial(tester);
     final IconTheme iconTheme = _getAppBarIconTheme(tester);
@@ -116,10 +118,8 @@ void main() {
     const IconThemeData iconThemeData = IconThemeData(color: Colors.green);
     const IconThemeData actionsIconThemeData = IconThemeData(color: Colors.lightBlue);
 
-    final ThemeData themeData = _themeData().copyWith(appBarTheme: _appBarTheme());
-
     await tester.pumpWidget(MaterialApp(
-      theme: themeData,
+      theme: ThemeData.from(colorScheme: const ColorScheme.light()),
       home: Scaffold(appBar: AppBar(
         iconTheme: iconThemeData,
         actionsIconTheme: actionsIconThemeData,
@@ -135,16 +135,20 @@ void main() {
 
   testWidgets('AppBarTheme properties take priority over ThemeData properties', (WidgetTester tester) async {
     final AppBarTheme appBarTheme = _appBarTheme();
-    final ThemeData themeData = _themeData().copyWith(appBarTheme: _appBarTheme());
 
-    await tester.pumpWidget(MaterialApp(
-      theme: themeData,
-      home: Scaffold(appBar: AppBar(
-        actions: <Widget>[
-          IconButton(icon: const Icon(Icons.share), onPressed: () { }),
-        ],
-      )),
-    ));
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: ThemeData.from(colorScheme: const ColorScheme.light())
+          .copyWith(appBarTheme: _appBarTheme()),
+        home: Scaffold(
+          appBar: AppBar(
+            actions: <Widget>[
+              IconButton(icon: const Icon(Icons.share), onPressed: () { }),
+            ],
+          ),
+        ),
+      ),
+    );
 
     final Material widget = _getAppBarMaterial(tester);
     final IconTheme iconTheme = _getAppBarIconTheme(tester);
@@ -162,33 +166,80 @@ void main() {
     expect(text.style, appBarTheme.textTheme!.bodyText2);
   });
 
-  testWidgets('ThemeData properties are used when no AppBarTheme is set', (WidgetTester tester) async {
-    final ThemeData themeData = _themeData();
-
-    await tester.pumpWidget(MaterialApp(
-      theme: themeData,
-      home: Scaffold(appBar: AppBar(
-        actions: <Widget>[
-          IconButton(icon: const Icon(Icons.share), onPressed: () { }),
-        ],
-      )),
-    ));
-
-    final Material widget = _getAppBarMaterial(tester);
-    final IconTheme iconTheme = _getAppBarIconTheme(tester);
-    final IconTheme actionsIconTheme = _getAppBarActionsIconTheme(tester);
-    final RichText actionIconText = _getAppBarIconRichText(tester);
-    final DefaultTextStyle text = _getAppBarText(tester);
-
-    expect(SystemChrome.latestStyle!.statusBarBrightness, themeData.brightness);
-    expect(widget.color, themeData.primaryColor);
-    expect(widget.elevation, 4.0);
-    expect(widget.shadowColor, Colors.black);
-    expect(iconTheme.data, themeData.primaryIconTheme);
-    expect(actionsIconTheme.data, themeData.primaryIconTheme);
-    expect(actionIconText.text.style!.color, themeData.primaryIconTheme.color);
-    // Default value for ThemeData.typography is Typography.material2014()
-    expect(text.style, Typography.material2014().englishLike.bodyText2!.merge(Typography.material2014().white.bodyText2).merge(themeData.primaryTextTheme.bodyText2));
+  testWidgets('ThemeData colorScheme is used when no AppBarTheme is set', (WidgetTester tester) async {
+    late ThemeData theme;
+    Widget buildFrame(ThemeData appTheme) {
+      return MaterialApp(
+        theme: appTheme,
+        home: Builder(
+          builder: (BuildContext context) {
+            // This ThemeData has been localized with ThemeData.localize. The
+            // appTheme parameter has not, so its textTheme is incomplete.
+            theme = Theme.of(context);
+            return Scaffold(
+              appBar: AppBar(
+                actions: <Widget>[
+                  IconButton(icon: const Icon(Icons.share), onPressed: () { }),
+                ],
+              ),
+            );
+          },
+        ),
+      );
+    }
+
+    // AppBar defaults for light themes:
+    // - elevation: 4
+    // - shadow color: black
+    // - background color: ColorScheme.primary
+    // - foreground color: ColorScheme.onPrimary
+    // - actions text: style bodyText2, foreground color
+    // - status bar brightness: dark (based on color scheme brightness)
+    {
+      await tester.pumpWidget(buildFrame(ThemeData.from(colorScheme: const ColorScheme.light())));
+
+      final Material widget = _getAppBarMaterial(tester);
+      final IconTheme iconTheme = _getAppBarIconTheme(tester);
+      final IconTheme actionsIconTheme = _getAppBarActionsIconTheme(tester);
+      final RichText actionIconText = _getAppBarIconRichText(tester);
+      final DefaultTextStyle text = _getAppBarText(tester);
+
+      expect(SystemChrome.latestStyle!.statusBarBrightness, SystemUiOverlayStyle.dark.statusBarBrightness);
+      expect(widget.color, theme.colorScheme.primary);
+      expect(widget.elevation, 4.0);
+      expect(widget.shadowColor, Colors.black);
+      expect(iconTheme.data.color, theme.colorScheme.onPrimary);
+      expect(actionsIconTheme.data.color, theme.colorScheme.onPrimary);
+      expect(actionIconText.text.style!.color, theme.colorScheme.onPrimary);
+      expect(text.style.compareTo(theme.textTheme.bodyText2!.copyWith(color: theme.colorScheme.onPrimary)), RenderComparison.identical);
+    }
+
+    // AppBar defaults for dark themes:
+    // - elevation: 4
+    // - shadow color: black
+    // - background color: ColorScheme.surface
+    // - foreground color: ColorScheme.onSurface
+    // - actions text: style bodyText2, foreground color
+    // - status bar brightness: dark (based on background color)
+    {
+      await tester.pumpWidget(buildFrame(ThemeData.from(colorScheme: const ColorScheme.dark())));
+      await tester.pumpAndSettle(); // Theme change animation
+
+      final Material widget = _getAppBarMaterial(tester);
+      final IconTheme iconTheme = _getAppBarIconTheme(tester);
+      final IconTheme actionsIconTheme = _getAppBarActionsIconTheme(tester);
+      final RichText actionIconText = _getAppBarIconRichText(tester);
+      final DefaultTextStyle text = _getAppBarText(tester);
+
+      expect(SystemChrome.latestStyle!.statusBarBrightness, SystemUiOverlayStyle.light.statusBarBrightness);
+      expect(widget.color, theme.colorScheme.surface);
+      expect(widget.elevation, 4.0);
+      expect(widget.shadowColor, Colors.black);
+      expect(iconTheme.data.color, theme.colorScheme.onSurface);
+      expect(actionsIconTheme.data.color, theme.colorScheme.onSurface);
+      expect(actionIconText.text.style!.color, theme.colorScheme.onSurface);
+      expect(text.style.compareTo(theme.textTheme.bodyText2!.copyWith(color: theme.colorScheme.onSurface)), RenderComparison.identical);
+    }
   });
 
   testWidgets('AppBar uses AppBarTheme.centerTitle when centerTitle is null', (WidgetTester tester) async {
@@ -375,15 +426,6 @@ AppBarTheme _appBarTheme() {
   );
 }
 
-ThemeData _themeData() {
-  return ThemeData(
-    primaryColor: Colors.purple,
-    brightness: Brightness.dark,
-    primaryIconTheme: const IconThemeData(color: Colors.green),
-    primaryTextTheme: const TextTheme(headline6: TextStyle(color: Colors.orange), bodyText2: TextStyle(color: Colors.pink)),
-  );
-}
-
 Material _getAppBarMaterial(WidgetTester tester) {
   return tester.widget<Material>(
     find.descendant(