MarkedDatePickerDialog constructor

MarkedDatePickerDialog({ Key? key, required DateTime initialDate, required DateTime firstDate, required DateTime lastDate, DateTime? currentDate, DatePickerEntryMode initialEntryMode = DatePickerEntryMode.calendar, SelectableDayPredicate? selectableDayPredicate, String? cancelText, String? confirmText, String? helpText, DatePickerMode initialCalendarMode = DatePickerMode.day, String? errorFormatText, String? errorInvalidText, String? fieldHintText, String? fieldLabelText, String? restorationId, ValueListenable<List<DateTime>>? markedDatesListenable, UpdateMonthCallback? updateMonthCallback, Widget? marking, Color? todayColor, Color? markedColor, Color? selectedDayColor, Color? selectedDayBackground, })

A Material-style date picker dialog.

Implementation

MarkedDatePickerDialog({
  Key? key,
  required DateTime initialDate,
  required DateTime firstDate,
  required DateTime lastDate,
  DateTime? currentDate,
  this.initialEntryMode = DatePickerEntryMode.calendar,
  this.selectableDayPredicate,
  this.cancelText,
  this.confirmText,
  this.helpText,
  this.initialCalendarMode = DatePickerMode.day,
  this.errorFormatText,
  this.errorInvalidText,
  this.fieldHintText,
  this.fieldLabelText,
  this.restorationId,
  this.markedDatesListenable,
  this.updateMonthCallback,
  this.marking,
  this.todayColor,
  this.markedColor,
  this.selectedDayColor,
  this.selectedDayBackground,
})  : initialDate = DateUtils.dateOnly(initialDate),
      firstDate = DateUtils.dateOnly(firstDate),
      lastDate = DateUtils.dateOnly(lastDate),
      currentDate = DateUtils.dateOnly(currentDate ?? DateTime.now()),
      super(key: key) {
  assert(
    !this.lastDate.isBefore(this.firstDate),
    'lastDate ${this.lastDate} must be on or after firstDate ${this.firstDate}.',
  );
  assert(
    !this.initialDate.isBefore(this.firstDate),
    'initialDate ${this.initialDate} must be on or after firstDate ${this.firstDate}.',
  );
  assert(
    !this.initialDate.isAfter(this.lastDate),
    'initialDate ${this.initialDate} must be on or before lastDate ${this.lastDate}.',
  );
  assert(
    selectableDayPredicate == null ||
        selectableDayPredicate!(this.initialDate),
    'Provided initialDate ${this.initialDate} must satisfy provided selectableDayPredicate',
  );
}