using System;
using System.Globalization;
using System.Windows.Data;

namespace Melskin.Converters.Internal
{
    internal class NegativeConverter : IValueConverter
    {
        public static readonly NegativeConverter Instance = new NegativeConverter();
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            //if (value is double d) return -d;
            //if (value is int i) return -i;
            //if (value is float f) return -f;
            //if (value is decimal dec) return -dec;
            //if (value is long l) return -l;
            if (value is Thickness thickness)
            {
                return new Thickness(-thickness.Left, -thickness.Top, -thickness.Right, -thickness.Bottom);
            }
            // 也可以使用 Convert.ToDouble 进行更通用的转换
            return -(System.Convert.ToDouble(value));
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}