LedInnerDiameterConverter.cs

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using System.Globalization;
using System.Windows.Data;
 
namespace Dreamine.UI.Wpf.Converters
{
    public sealed class LedInnerDiameterConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            if (values == null || values.Length < 2) return 0.0;
            double diameter = (values[0] is double d) ? d : 0.0;
            double innerScale = (values[1] is double s) ? s : 0.45;
            innerScale = (innerScale < 0) ? 0 : (innerScale > 1 ? 1 : innerScale);
            return diameter * innerScale;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) =>
            throw new NotSupportedException();
    }
 
}