I'm trying to convert a double value (e.g. 9.5) to a corresponding hour/minute value (e.g. 9.30). I also want to perform calculations using this value, but handle it like a time value (e.g. adding 23 and 2 should result in 1 as the hours should wrap around at 24 hours).
I already tried to convert the value to DateTime, but it says "invalid date format".
This should do it
void main() {
print(getTimeStringFromDouble(9.5)); // 9:30
print(getTimeStringFromDouble(25.0)); // 1:0
}
String getTimeStringFromDouble(double value) {
if (value < 0) return 'Invalid Value';
int flooredValue = value.floor();
double decimalValue = value - flooredValue;
String hourValue = getHourString(flooredValue);
String minuteString = getMinuteString(decimalValue);
return '$hourValue:$minuteString';
}
String getMinuteString(double decimalValue) {
return '${(decimalValue * 60).toInt()}'.padLeft(2, '0');
}
String getHourString(int flooredValue) {
return '${flooredValue % 24}'.padLeft(2, '0');
}