34 lines
1.0 KiB
C#
34 lines
1.0 KiB
C#
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using System;
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using System.Globalization;
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using System.Windows.Controls;
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using System.Windows.Data;
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namespace Wpf.Ui.Extend.Converters;
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/// <summary>
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/// 滑动块标签位置
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/// </summary>
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[ValueConversion(typeof(double), typeof(double), ParameterType = typeof(Orientation))]
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internal class SliderValueLabelPositionConverter : IValueConverter
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{
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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if (parameter is Orientation orientation && value is double width)
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{
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const double halfGripWidth = 9.0;
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const double margin = 4.0;
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return orientation switch
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{
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Orientation.Horizontal => (-width * 0.5) + halfGripWidth,
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Orientation.Vertical => -width - margin,
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_ => throw new ArgumentOutOfRangeException()
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};
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}
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return 0.0;
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}
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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=> throw new NotImplementedException();
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}
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