🏁 provide start day while navigating to next page in week view. (#75)

Author: PRBaraiya

lib/src/month_view/month_view.dart

@@ -400,7 +400,6 @@ class MonthViewState<T extends Object?> extends State<MonthView<T>> {
         _currentDate = DateTime(
           _currentDate.year,
           _currentDate.month + (value - _currentIndex),
-          _currentDate.day,
         );
         _currentIndex = value;
       });
@@ -517,8 +516,7 @@ class MonthViewState<T extends Object?> extends State<MonthView<T>> {
   }
 
   /// Returns the current visible date in month view.
-  DateTime get currentDate =>
-      DateTime(_currentDate.year, _currentDate.month, _currentDate.day);
+  DateTime get currentDate => DateTime(_currentDate.year, _currentDate.month);
 }
 
 /// A single month page.

lib/src/week_view/week_view.dart

@@ -474,7 +474,8 @@ class WeekViewState<T extends Object?> extends State<WeekView<T>> {
       "Provided minimum date: $_minDate, maximum date: $_maxDate",
     );
 
-    _totalWeeks = _minDate.getWeekDifference(_maxDate) + 1;
+    _totalWeeks =
+        _minDate.getWeekDifference(_maxDate, start: widget.startDay) + 1;
   }
 
   /// Default builder for week line.
@@ -621,7 +622,8 @@ class WeekViewState<T extends Object?> extends State<WeekView<T>> {
     if (week.isBefore(_minDate) || week.isAfter(_maxDate)) {
       throw "Invalid date selected.";
     }
-    _pageController.jumpToPage(_minDate.getWeekDifference(week));
+    _pageController
+        .jumpToPage(_minDate.getWeekDifference(week, start: widget.startDay));
   }
 
   /// Animate to page which gives day calendar for [week].
@@ -635,7 +637,7 @@ class WeekViewState<T extends Object?> extends State<WeekView<T>> {
       throw "Invalid date selected.";
     }
     await _pageController.animateToPage(
-      _minDate.getWeekDifference(week),
+      _minDate.getWeekDifference(week, start: widget.startDay),
       duration: duration ?? widget.pageTransitionDuration,
       curve: curve ?? widget.pageTransitionCurve,
     );