public object ConvertBack(object value, Type targetType, object parameter, string language)
{
ConvertToWeight expected = ConvertToWeight.Kilograms;
if (parameter is ConvertToWeight supportedWeight)
{
expected = supportedWeight;
}
else if (parameter is string str)
{
if (Enum.TryParse <ConvertToWeight>(str, out ConvertToWeight supported))
{
expected = supported;
}
}
if (value is string content)
{
if (ValueWithUnits.TryParse(content, out ValueWithUnits valueWithUnits))
{
return(FilamentMath.ConvertWeight(valueWithUnits.Value, FilamentMath.SupportedWeightAlias(valueWithUnits.Units), expected));
}
}
return(double.NaN);
//throw new NotImplementedException();
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
ConvertToWeight convertTo = ConvertToWeight.Kilograms;
string defaultUnits;
if (parameter is string paraString)
{
if (Enum.TryParse(paraString, out ConvertToWeight result))
{
convertTo = result;
defaultUnits = shortHandnames[(int)result];
}
else
{
defaultUnits = shortHandnames[(int)convertTo];
}
}
else
{
defaultUnits = shortHandnames[(int)convertTo];
}
if (value is string str)
{
//if (str.Contains(space))
//{
// var args = str.Split(space);
// if (args.Length ==2 && args.Count(a => a.Length > 0) == 2)
// {
// if (double.TryParse(args[0], out double result))
// return result * ConversionFactor(args[1].ToLower(), convertTo);
// else
// return double.NaN;
// }
//}
//else if (str.Count(ch => char.IsLetter(ch)) > 0)
//{
// var num = new string(str.Where(ch=>char.IsDigit(ch)||ch== '.').ToArray());
// var units = new string(str.Where(ch => char.IsLetter(ch)).ToArray());
// if(double.TryParse(num, out double result))
// return result * ConversionFactor(units.ToLower(),convertTo);
//}
//if (Regex.IsMatch(str, regexFindNumberAndUnit))
//{
// var match = Regex.Match(str, regexFindNumberAndUnit);
// if (double.TryParse(match.Groups["number"].Value, out double result))
// return result * ConversionFactor(String.IsNullOrEmpty(match.Groups["units"].Value) ? defaultUnits : match.Groups["units"].Value, convertTo);
// else
// return double.NaN;
//}
if (ValueWithUnits.TryParse(str, out ValueWithUnits valueWithUnits))
{
return(FilamentMath.ConvertWeight(valueWithUnits.Value,
FilamentMath.SupportedWeightAlias(string.IsNullOrEmpty(valueWithUnits.Units) ? defaultUnits : valueWithUnits.Units),
convertTo));
}
else
{
return(double.NaN);
}
}
if (value is double d)
{
return(d);
}
else
{
return(double.NaN);
}
//throw new NotImplementedException();
}
public static double ConvertWeight(double measurement, SupportedWeight supported, ConvertToWeight convertTo)
{
double result = double.NaN;
if (!double.IsNaN(measurement))
{
switch (supported)
{
case SupportedWeight.Gram:
switch (convertTo)
{
case ConvertToWeight.Grams:
result = measurement;
break;
case ConvertToWeight.Millgrams:
result = measurement * 1000;
break;
case ConvertToWeight.Kilograms:
result = measurement * 1e-3;
break;
default:
System.Diagnostics.Debug.WriteLine($"{supported} is not supported.");
break;
}
break;
case SupportedWeight.Kilogram:
switch (convertTo)
{
case ConvertToWeight.Grams:
result = measurement * 1000;
break;
case ConvertToWeight.Millgrams:
result = measurement * 1e6;
break;
case ConvertToWeight.Kilograms:
result = measurement;
break;
default:
System.Diagnostics.Debug.WriteLine($"{supported} is not supported.");
break;
}
break;
case SupportedWeight.Ounce:
switch (convertTo)
{
case ConvertToWeight.Grams:
result = measurement * Constants.OunceToGram;
break;
case ConvertToWeight.Millgrams:
result = measurement * Constants.OunceToGram * 1000;
break;
case ConvertToWeight.Kilograms:
result = measurement * Constants.OunceToGram / 1000;
break;
default:
System.Diagnostics.Debug.WriteLine($"{supported} is not supported.");
break;
}
break;
case SupportedWeight.Pound:
switch (convertTo)
{
case ConvertToWeight.Grams:
result = measurement * Constants.PoundToGram;
break;
case ConvertToWeight.Millgrams:
result = measurement * Constants.PoundToGram * 1000;
break;
case ConvertToWeight.Kilograms:
result = measurement * Constants.PoundToKg;
break;
default:
System.Diagnostics.Debug.WriteLine($"{supported} is not supported.");
break;
}
break;
default:
break;
}
return(result);
}
return(measurement);
}