ShrlAlgoToolkit/Melskin/Converters/Internal/IntensityToSlotLightMarginConverter.cs

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

namespace Melskin.Converters.Internal;

/// <summary>
/// 将光强度值转换为灯光边距的转换器。该转换器实现了 IValueConverter 接口，用于将双精度浮点数表示的光强度值转换成 Thickness 类型的对象，代表了灯光效果在用户界面中的边距。
/// </summary>
/// <remarks>
/// 该转换器主要用于 WPF 应用程序中，通过绑定到 UI 元素上，实现基于光强度动态调整边距的效果。它不支持从 Thickness 转换回光强度的逆向操作。
/// </remarks>
[ValueConversion(typeof(double), typeof(Thickness))]
internal class IntensityToSlotLightMarginConverter : IValueConverter
{
    public static readonly IntensityToSlotLightMarginConverter Instance = new();

    public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        var intensity = (double)(value ?? 0);
        //此处与中央Margin匹配
        var offset = 4 + intensity * 4;
        return new Thickness(offset, offset, 0, 0);
    }

    public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
    {
        return Binding.DoNothing;
    }
}