/// <summary>
/// Calculate the incoming expression string with variables.
/// </summary>
/// <param name="values">The array of variables for an expression</param>
/// <param name="targetType">The type of the binding target property. This is not implemented.</param>
/// <param name="parameter">The expression to calculate.</param>
/// <param name="culture">The culture to use in the converter. This is not implemented.</param>
/// <returns>A <see cref="double"/> The result of calculating an expression.</returns>
public object?Convert(object[]?values, Type?targetType, object?parameter, CultureInfo culture)
{
if (parameter is not string expression)
{
throw new ArgumentException("The parameter should be of type String.");
}
if (values == null)
{
return(null);
}
var args = new List <double>();
foreach (var value in values)
{
if (value == null)
{
return(null);
}
if (double.TryParse(value.ToString(), out var xValue))
{
args.Add(xValue);
}
}
var math = new MathExpression(expression, args);
var result = math.Calculate();
return(result);
}
/// <summary>
/// Calculate the incoming expression string with one variable.
/// </summary>
/// <param name="value">The variable X for an expression</param>
/// <param name="targetType">The type of the binding target property. This is not implemented.</param>
/// <param name="parameter">The expression to calculate.</param>
/// <param name="culture">The culture to use in the converter. This is not implemented.</param>
/// <returns>A <see cref="double"/> The result of calculating an expression.</returns>
public object?Convert(object?value, Type?targetType, object?parameter, CultureInfo culture)
{
if (parameter is not string expression)
{
throw new ArgumentException("The parameter should be of type String.");
}
if (value == null || !double.TryParse(value.ToString(), out var xValue))
{
return(null);
}
var math = new MathExpression(expression, new[] { xValue });
var result = math.Calculate();
return(result);
}