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