onViewChanged property

ViewChangedCallback? onViewChanged

Called when the current visible date changes in SfCalendar.

Called in the following scenarios when the visible dates were changed

1. When calendar loaded the visible dates initially.
2. When calendar view swiped to previous/next view.
3. When calendar view changed, i.e: Month to day, etc..,
4. When navigated to a specific date programmatically by using the controller.displayDate.
5. When navigated programmatically using controller.forward and controller.backward.

The visible dates collection visible on view when the view changes available in the ViewChangedDetails.

See also:

• ViewChangedDetails, which contains the visible dates collection of the current visible view.
• initialDisplayDate, to display calendar on a desired date in initial.
• CalendarController.displayDate, to change the display date of calendar programmatically on run time.
• CalendarController.forward, to navigate to next view of calendar programmatically.
• CalendarController.backward, to navigate to previous view of calendar Programmatically.
• Knowledge base: How to update blackout dates using onViewChanged
• Knowledge base: How to clear the appointments in the month agenda view using onViewChange
• Knowledge base: How to add a special region dynamically using onTap, onViewChanged

Widget build(BuildContext context) {
   return Container(
     child: SfCalendar(
       view: CalendarView.week,
       onViewChanged: (ViewChangedDetails details){
         List<DateTime> dates = details.visibleDates;
       },
     ),
   );
 }

Implementation

final ViewChangedCallback? onViewChanged;