LedBrushConverter.cs

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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;
 
namespace Dreamine.UI.Wpf.Converters
{
    public sealed class LedBrushConverter : IMultiValueConverter
    {
        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            bool isOn = (values != null && values.Length > 0 && values[0] is bool b) && b;
            var onBrush = (values != null && values.Length > 1) ? values[1] : null;
            var offBrush = (values != null && values.Length > 2) ? values[2] : null;
            return (isOn ? onBrush : offBrush) ?? null!;
        }

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