getYearPageCount method
year pages count
Implementation
int getYearPageCount(DateTime? firstDate, DateTime? lastDate) {
if (firstDate != null && lastDate != null) {
if (lastDate.year - firstDate.year <= 12)
return 1;
else
return ((lastDate.year - firstDate.year + 1) / 12).ceil();
} else if (firstDate != null && lastDate == null) {
return (yearItemCount / 12).ceil();
} else if (firstDate == null && lastDate != null) {
return (yearItemCount / 12).ceil();
} else
return (9999 / 12).ceil();
}