27 lines
1.2 KiB
C#
27 lines
1.2 KiB
C#
using System.Globalization;
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using System.Windows.Data;
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namespace Melskin.Converters.Internal;
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/// <summary>
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/// 将浮点数类型的强度值转换为左上边距的 Thickness 对象。该转换器适用于需要根据浮点数值动态调整 UI 元素边距的场景。
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/// 当输入的强度值为 1 时，生成的边距最小，随着强度值减小，边距逐渐增大，从而影响 UI 元素显示效果，如阴影或光照效果的范围。
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/// </summary>
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[ValueConversion(typeof(double), typeof(Thickness))]
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internal class IntensityToEmbossMarginLeftTopConverter : IValueConverter
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{
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public static readonly IntensityToEmbossMarginLeftTopConverter Instance = new();
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public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
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{
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var intensity = (double)(value ?? 0.5);
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//数值为1的时候边距最小，露出的着色边框越大
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var marginValue = 2 * intensity;
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return new Thickness(-marginValue, -marginValue, marginValue, marginValue);
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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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return Binding.DoNothing;
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}
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} |