previousYear method

dynamic previousYear()

Implementation

previousYear() {
  int year = scrollYearInt;
  year -= 1;
  if (year < minDateTime.year) return;
  int month = scrollMonthInt;
  if (year == minDateTime.year && month < minDateTime.month) {
    month = minDateTime.month;
  }
  controller.jumpTo(offsetForDateTime(DateTime(year, month)));
}