I have included missed theme file for datepicker

LokeshPalani · LokeshPalani · commit 5c1d4dc57814 · 2024-03-20T15:59:42.000+05:30
diff --git a/packages/syncfusion_flutter_datepicker/lib/src/date_picker/theme.dart b/packages/syncfusion_flutter_datepicker/lib/src/date_picker/theme.dart
@@ -0,0 +1,99 @@
+import 'package:flutter/material.dart';
+import 'package:syncfusion_flutter_core/theme.dart';
+
+/// [SfDateRangePickerThemeDataM2] this class provides material2 themeData.
+/// SfDateRangePickerThemeDataM2 class extends the 'SfDateRangePickerThemeData'
+/// class and customize the appearance of a mapping component based on th color
+/// scheme obtained from the provided [BuildContext].
+class SfDateRangePickerThemeDataM2 extends SfDateRangePickerThemeData {
+  /// This a constructor that takes a [BuildContext] as a parameter.This context
+  /// is used for obtaining the color scheme of the current theme.
+  SfDateRangePickerThemeDataM2(this.context);
+
+  /// Property that stores the provided [BuildContext]
+  /// context is later used to obtain the color scheme.
+  final BuildContext context;
+
+  /// A late-initialized property representing the color scheme obtained from
+  /// the current theme using the provided [BuildContext]
+  late final ColorScheme colorScheme = Theme.of(context).colorScheme;
+
+  @override
+  Color? get backgroundColor => Colors.transparent;
+
+  @override
+  Color? get headerBackgroundColor => colorScheme.brightness == Brightness.light
+      ? Colors.white
+      : Colors.grey[850];
+
+  @override
+  Color? get viewHeaderBackgroundColor => Colors.transparent;
+
+  @override
+  Color? get weekNumberBackgroundColor =>
+      colorScheme.onSurface.withOpacity(0.08);
+
+  @override
+  Color? get selectionColor => colorScheme.primary;
+
+  @override
+  Color? get startRangeSelectionColor => colorScheme.primary;
+
+  @override
+  Color? get rangeSelectionColor => colorScheme.primary.withOpacity(0.1);
+
+  @override
+  Color? get endRangeSelectionColor => colorScheme.primary;
+
+  @override
+  Color? get todayHighlightColor => colorScheme.primary;
+}
+
+/// [SfDateRangePickerThemeDataM3] this class provides material3 themeData.
+/// SfDateRangePickerThemeDataM3 class extends the 'SfDateRangePickerThemeData'
+/// class and customize the appearance of a mapping component based on th color
+/// scheme obtained from the provided [BuildContext].
+class SfDateRangePickerThemeDataM3 extends SfDateRangePickerThemeData {
+  /// This a constructor that takes a [BuildContext] as a parameter.This context
+  /// is used for obtaining the color scheme of the current theme.
+  SfDateRangePickerThemeDataM3(this.context);
+
+  /// Property that stores the provided [BuildContext]
+  /// context is later used to obtain the color scheme.
+  final BuildContext context;
+
+  /// A late-initialized property representing the color scheme obtained from
+  /// the current theme using the provided [BuildContext]
+  late final ColorScheme colorScheme = Theme.of(context).colorScheme;
+
+  @override
+  Color? get backgroundColor => colorScheme.brightness == Brightness.light
+      ? const Color.fromRGBO(238, 232, 244, 1)
+      : const Color.fromRGBO(48, 45, 56, 1);
+
+  @override
+  Color? get headerBackgroundColor => colorScheme.brightness == Brightness.light
+      ? const Color.fromRGBO(238, 232, 244, 1)
+      : const Color.fromRGBO(48, 45, 56, 1);
+
+  @override
+  Color? get viewHeaderBackgroundColor => Colors.transparent;
+
+  @override
+  Color? get weekNumberBackgroundColor => colorScheme.surfaceVariant;
+
+  @override
+  Color? get selectionColor => colorScheme.primary;
+
+  @override
+  Color? get startRangeSelectionColor => colorScheme.primary;
+
+  @override
+  Color? get rangeSelectionColor => colorScheme.primary.withOpacity(0.12);
+
+  @override
+  Color? get endRangeSelectionColor => colorScheme.primary;
+
+  @override
+  Color? get todayHighlightColor => colorScheme.primary;
+}
