showMonthYearPicker function

Future<DateTime?> showMonthYearPicker({ required BuildContext context, required DateTime initialDate, required DateTime firstDate, required DateTime lastDate, SelectableMonthYearPredicate? selectableMonthYearPredicate, Locale? locale, bool useRootNavigator = true, RouteSettings? routeSettings, TextDirection? textDirection, TransitionBuilder? builder, MonthYearPickerMode initialMonthYearPickerMode = MonthYearPickerMode.month, })

Displays month year picker dialog. initialDate is the initially selected month. firstDate is the lower bound for month selection. lastDate is the upper bound for month selection.

Implementation

Future<DateTime?> showMonthYearPicker({
  required BuildContext context,
  required DateTime initialDate,
  required DateTime firstDate,
  required DateTime lastDate,
  SelectableMonthYearPredicate? selectableMonthYearPredicate,
  Locale? locale,
  bool useRootNavigator = true,
  RouteSettings? routeSettings,
  TextDirection? textDirection,
  TransitionBuilder? builder,
  MonthYearPickerMode initialMonthYearPickerMode = MonthYearPickerMode.month,
}) async {
  initialDate = monthYearOnly(initialDate);
  firstDate = monthYearOnly(firstDate);
  lastDate = monthYearOnly(lastDate);

  assert(
    !lastDate.isBefore(firstDate),
    'lastDate $lastDate must be on or after firstDate $firstDate.',
  );
  assert(
    !initialDate.isBefore(firstDate),
    'initialDate $initialDate must be on or after firstDate $firstDate.',
  );
  assert(
    !initialDate.isAfter(lastDate),
    'initialDate $initialDate must be on or before lastDate $lastDate.',
  );
  assert(debugCheckHasMaterialLocalizations(context));
  assert(debugCheckHasMonthYearPickerLocalizations(context));
  assert(debugCheckHasDirectionality(context));

  Widget dialog = MonthYearPickerDialog(
    initialDate: initialDate,
    firstDate: firstDate,
    lastDate: lastDate,
    initialMonthYearPickerMode: initialMonthYearPickerMode,
    selectableMonthYearPredicate: selectableMonthYearPredicate,
  );

  if (textDirection != null) {
    dialog = Directionality(
      textDirection: textDirection,
      child: dialog,
    );
  }

  if (locale != null) {
    dialog = Localizations.override(
      context: context,
      locale: locale,
      child: dialog,
    );
  }

  return await showDialog<DateTime>(
    context: context,
    useRootNavigator: useRootNavigator,
    routeSettings: routeSettings,
    builder: (context) => builder == null ? dialog : builder(context, dialog),
  );
}