Update hourMinuteTextStyle defaults for Material 3 Time Picker (#143749)

fixes [`hourMinuteTextStyle` Material 3 default doesn't match the specs](#143748)

This updates `hourMinuteTextStyle` defaults to match Material 3 specs. `hourMinuteTextStyle` should use different font style for different entry modes based on the specs.

### Specs
![Screenshot 2024-02-20 at 15 06 40](https://github.com/flutter/flutter/assets/48603081/5198a5da-314d-401e-8d7f-d4a68b86e43c)
![Screenshot 2024-02-20 at 15 07 22](https://github.com/flutter/flutter/assets/48603081/79436ce4-fef6-480a-bc43-b628497e860f)

### Before
```dart
 return _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states));
```
### After 
```dart
      return entryMode == TimePickerEntryMode.dial
        ? _textTheme.displayLarge!.copyWith(color: _hourMinuteTextColor.resolve(states))
        : _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states));
```

Author: TahaTesser

dev/tools/gen_defaults/lib/time_picker_template.dart

@@ -19,9 +19,10 @@ class TimePickerTemplate extends TokenTemplate {
   @override
   String generate() => '''
 class _${blockName}DefaultsM3 extends _TimePickerDefaults {
-  _${blockName}DefaultsM3(this.context);
+  _${blockName}DefaultsM3(this.context, { this.entryMode = TimePickerEntryMode.dial });
 
   final BuildContext context;
+  final TimePickerEntryMode entryMode;
 
   late final ColorScheme _colors = Theme.of(context).colorScheme;
   late final TextTheme _textTheme = Theme.of(context).textTheme;
@@ -284,7 +285,12 @@ class _${blockName}DefaultsM3 extends _TimePickerDefaults {
       // TODO(tahatesser): Update this when https://github.com/flutter/flutter/issues/131247 is fixed.
       // This is using the correct text style from Material 3 spec.
       // https://m3.material.io/components/time-pickers/specs#fd0b6939-edab-4058-82e1-93d163945215
-      return _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states));
+      return switch (entryMode) {
+        TimePickerEntryMode.dial || TimePickerEntryMode.dialOnly
+          => _textTheme.displayLarge!.copyWith(color: _hourMinuteTextColor.resolve(states)),
+        TimePickerEntryMode.input || TimePickerEntryMode.inputOnly
+          => _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states)),
+      };
     });
   }
 

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

@@ -2752,7 +2752,7 @@ class _TimePickerState extends State<_TimePicker> with RestorationMixin {
     assert(debugCheckHasMediaQuery(context));
     final TimeOfDayFormat timeOfDayFormat = localizations.timeOfDayFormat(alwaysUse24HourFormat: MediaQuery.alwaysUse24HourFormatOf(context));
     final ThemeData theme = Theme.of(context);
-    final _TimePickerDefaults defaultTheme = theme.useMaterial3 ? _TimePickerDefaultsM3(context) : _TimePickerDefaultsM2(context);
+    final _TimePickerDefaults defaultTheme = theme.useMaterial3 ? _TimePickerDefaultsM3(context, entryMode: widget.entryMode) : _TimePickerDefaultsM2(context);
     final Orientation orientation = _orientation.value ?? MediaQuery.orientationOf(context);
     final HourFormat timeOfDayHour = hourFormat(of: timeOfDayFormat);
     final _HourDialType hourMode = switch (timeOfDayHour) {
@@ -3347,9 +3347,10 @@ class _TimePickerDefaultsM2 extends _TimePickerDefaults {
 //   dev/tools/gen_defaults/bin/gen_defaults.dart.
 
 class _TimePickerDefaultsM3 extends _TimePickerDefaults {
-  _TimePickerDefaultsM3(this.context);
+  _TimePickerDefaultsM3(this.context, { this.entryMode = TimePickerEntryMode.dial });
 
   final BuildContext context;
+  final TimePickerEntryMode entryMode;
 
   late final ColorScheme _colors = Theme.of(context).colorScheme;
   late final TextTheme _textTheme = Theme.of(context).textTheme;
@@ -3612,7 +3613,12 @@ class _TimePickerDefaultsM3 extends _TimePickerDefaults {
       // TODO(tahatesser): Update this when https://github.com/flutter/flutter/issues/131247 is fixed.
       // This is using the correct text style from Material 3 spec.
       // https://m3.material.io/components/time-pickers/specs#fd0b6939-edab-4058-82e1-93d163945215
-      return _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states));
+      return switch (entryMode) {
+        TimePickerEntryMode.dial || TimePickerEntryMode.dialOnly
+          => _textTheme.displayLarge!.copyWith(color: _hourMinuteTextColor.resolve(states)),
+        TimePickerEntryMode.input || TimePickerEntryMode.inputOnly
+          => _textTheme.displayMedium!.copyWith(color: _hourMinuteTextColor.resolve(states)),
+      };
     });
   }
 

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

@@ -244,8 +244,16 @@ class TimePickerThemeData with Diagnosticable {
 
   /// Used to configure the [TextStyle]s for the hour/minute controls.
   ///
-  /// If this is null, the time picker defaults to the overall theme's
-  /// [TextTheme.headline3].
+  /// If this is null and entry mode is [TimePickerEntryMode.dial], the time
+  /// picker defaults to the overall theme's [TextTheme.displayLarge] with
+  /// the value of [hourMinuteTextColor].
+  ///
+  /// If this is null and entry mode is [TimePickerEntryMode.input], the time
+  /// picker defaults to the overall theme's [TextTheme.displayMedium] with
+  /// the value of [hourMinuteTextColor].
+  ///
+  /// If this is null and [ThemeData.useMaterial3] is false, the time picker
+  /// defaults to the overall theme's [TextTheme.displayMedium].
   final TextStyle? hourMinuteTextStyle;
 
   /// The input decoration theme for the [TextField]s in the time picker.

packages/flutter/test/material/time_picker_theme_test.dart

@@ -285,22 +285,22 @@ void main() {
     final RenderParagraph hourText = _textRenderParagraph(tester, '7');
     expect(
       hourText.text.style,
-      Typography.material2021().englishLike.displayMedium!
-        .merge(Typography.material2021().black.displayMedium)
+      Typography.material2021().englishLike.displayLarge!
+        .merge(Typography.material2021().black.displayLarge)
         .copyWith(
           color: defaultTheme.colorScheme.onPrimaryContainer,
-          decorationColor: defaultTheme.colorScheme.onSurface
+          decorationColor: defaultTheme.colorScheme.onSurface,
         ),
     );
 
     final RenderParagraph minuteText = _textRenderParagraph(tester, '15');
     expect(
       minuteText.text.style,
-      Typography.material2021().englishLike.displayMedium!
-        .merge(Typography.material2021().black.displayMedium)
+      Typography.material2021().englishLike.displayLarge!
+        .merge(Typography.material2021().black.displayLarge)
         .copyWith(
           color: defaultTheme.colorScheme.onSurface,
-          decorationColor: defaultTheme.colorScheme.onSurface
+          decorationColor: defaultTheme.colorScheme.onSurface,
         ),
     );
 
@@ -457,6 +457,28 @@ void main() {
     await tester.tap(find.text('X'));
     await tester.pumpAndSettle(const Duration(seconds: 1));
 
+    final TextStyle hourTextStyle = _textField(tester, '7').style!;
+    expect(
+      hourTextStyle,
+      Typography.material2021().englishLike.displayMedium!
+        .merge(Typography.material2021().black.displayMedium)
+        .copyWith(
+          color: defaultTheme.colorScheme.onSurface,
+          decorationColor: defaultTheme.colorScheme.onSurface,
+        ),
+    );
+
+    final TextStyle minuteTextStyle = _textField(tester, '15').style!;
+    expect(
+      minuteTextStyle,
+      Typography.material2021().englishLike.displayMedium!
+        .merge(Typography.material2021().black.displayMedium)
+        .copyWith(
+          color: defaultTheme.colorScheme.onSurface,
+          decorationColor: defaultTheme.colorScheme.onSurface,
+        ),
+    );
+
     final InputDecoration hourDecoration = _textField(tester, '7').decoration!;
     expect(hourDecoration.filled, true);
     expect(hourDecoration.fillColor, defaultTheme.colorScheme.surfaceContainerHighest);