fixed theme issues

example/lib/main.dart

@@ -31,7 +31,21 @@ class DatePickerDemo extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return DateTimePicker(
-      dateTimePickerTheme: const DateTimePickerTheme(),
+      dateTimePickerTheme: const DateTimePickerTheme(
+          markedIndicatorColor: Colors.red,
+          selectedTheme: DateBoxSelectedTheme(
+            Color(0x4BF44336),
+            TextStyle(
+              color: Colors.red,
+            ),
+          ),
+          highlightTheme: DateBoxHighlightTheme(
+            Colors.red,
+            TextStyle(
+              color: Colors.white,
+            ),
+          )),
+      markedDates: [DateTime(2022, 9, 6)],
     );
   }
 }

lib/src/date_time_picker.dart

@@ -7,6 +7,7 @@ import 'package:flutter_date_time_picker/src/widgets/month_date_time_picker.dart
 import 'package:flutter_date_time_picker/src/widgets/week_date_time_picker/week_date_time_picker_sheet.dart';
 import 'package:intl/date_symbol_data_local.dart';
 
+class DateTimePicker extends StatefulWidget {
   /// A widget that displays a date picker from a sheet form the top of the screen.
   /// This sheet displays initially displays a week but can be dragged down to show a full month.
   /// Both views can be dragged sideways to show the next or previous week/month.
@@ -107,7 +108,6 @@ import 'package:intl/date_symbol_data_local.dart';
   ///   ),
   /// ),
   ///```
-class DateTimePicker extends StatefulWidget {
   DateTimePicker({
     this.dateTimePickerTheme = const DateTimePickerTheme(),
     this.header,

lib/src/widgets/month_date_time_picker.dart/month_date_time_picker.dart

@@ -61,13 +61,6 @@ class MonthDateTimePicker extends StatelessWidget {
                     ? null
                     : () async {
                         TimeOfDay? timeOfDay;
-                        // await dateTimePickerController.getDragController().animateTo(
-                        //       0.26,
-                        //       duration: const Duration(
-                        //         milliseconds: 350,
-                        //       ),
-                        //       curve: Curves.ease,
-                        //     );
 
                         DateTime selectedDate = DateTime(
                           date.year,
@@ -131,7 +124,9 @@ class MonthDateTimePicker extends StatelessWidget {
                               width: monthDateBoxSize / 4,
                               height: monthDateBoxSize / 4,
                               decoration: BoxDecoration(
-                                color: Theme.of(context).indicatorColor,
+                                color: dateTimePickerController
+                                        .theme.markedIndicatorColor ??
+                                    Theme.of(context).indicatorColor,
                                 borderRadius: BorderRadius.circular(
                                     (monthDateBoxSize / 4) * 2),
                               ),

lib/src/widgets/month_date_time_picker.dart/month_date_time_picker_sheet.dart

@@ -30,10 +30,8 @@ class MonthDateTimePickerSheet extends StatelessWidget {
           DateFormat.yMMMM().format(
             dateTimePickerController.browsingDate,
           ),
-          style: Theme.of(context)
+          style: dateTimePickerController.theme.baseTheme.textStyle!
-              .textTheme
+              .copyWith(fontSize: 25),
-              .headlineMedium!
-              .copyWith(color: Colors.black),
         ),
         SizedBox(
           width: MediaQuery.of(context).size.width,

lib/src/widgets/week_date_time_picker/week_date_time_picker.dart

@@ -38,13 +38,6 @@ class WeekDateTimePicker extends StatelessWidget {
                 ? null
                 : () async {
                     TimeOfDay? timeOfDay;
-                    // await dateTimePickerController.getDragController().animateTo(
-                    //       0.26,
-                    //       duration: const Duration(
-                    //         milliseconds: 350,
-                    //       ),
-                    //       curve: Curves.ease,
-                    //     );
 
                     DateTime selectedDate = date.daysOfWeek()[index];
 
@@ -62,7 +55,8 @@ class WeekDateTimePicker extends StatelessWidget {
                           )) {
                         showDialog(
                           context: context,
-                          builder: (context) => dateTimePickerController.wrongTimeDialog!,
+                          builder: (context) =>
+                              dateTimePickerController.wrongTimeDialog!,
                         );
                       }
                     }
@@ -89,7 +83,7 @@ class WeekDateTimePicker extends StatelessWidget {
                           date.daysOfWeek().elementAt(index),
                         )
                         .toUpperCase()[0],
-                    style: Theme.of(context).textTheme.titleSmall,
+                    style: dateTimePickerController.theme.baseTheme.textStyle,
                   ),
                   const Spacer(),
                   Container(

lib/src/widgets/week_date_time_picker/week_date_time_picker_sheet.dart

@@ -45,7 +45,8 @@ class WeekDateTimePickerSheet extends StatelessWidget {
         if (showHeader) ...[
           Text(
             getDateHeader(),
-            style: Theme.of(context).textTheme.headlineSmall,
+            style: dateTimePickerController.theme.baseTheme.textStyle!
+                .copyWith(fontSize: 9),
           ),
           const SizedBox(
             height: 10,