picker method

@override Future<DateTimeRange?> picker(BuildContext context, DateTimeRange currentDateTimeRange)

Callback to display picker.

The currently selected DateTimeRange is passed to currentDateTimeRange.

ピッカーを表示するためのコールバック。

currentDateTimeRangeに現在選択中のDateTimeRangeが渡されます。

Implementation

@override
Future<DateTimeRange?> picker(
  BuildContext context,
  DateTimeRange currentDateTimeRange,
) async {
  final now = DateTime.now();
  final nowRange = defaultDateTimeRange;
  final date = await showDateRangePicker(
    context: context,
    helpText: helpText,
    cancelText: cancelText,
    confirmText: confirmText,
    locale: locale,
    initialEntryMode: initialEntryMode,
    errorFormatText: errorFormatText,
    errorInvalidText: errorInvalidText,
    fieldStartHintText: fieldStartHintText,
    fieldStartLabelText: fieldStartLabelText,
    fieldEndHintText: fieldEndHintText,
    fieldEndLabelText: fieldEndLabelText,
    firstDate: startDate ??
        (nowRange?.start ?? now).subtract(const Duration(days: 365)),
    initialDateRange: currentDateTimeRange,
    lastDate: endDate ??
        (nowRange?.end ?? now).add(
          const Duration(days: 365),
        ),
    builder: (context, child) {
      final theme = Theme.of(context);
      return Theme(
        data: theme.copyWith(
          datePickerTheme: theme.datePickerTheme.copyWith(
            rangeSelectionBackgroundColor: theme.primaryColor,
          ),
        ),
        child: child!,
      );
    },
  );
  return date;
}