95 lines
3.0 KiB
C#
95 lines
3.0 KiB
C#
using System;
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using System.Globalization;
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using System.Windows;
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using System.Windows.Data;
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namespace MainShell.Converter
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{
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public class BoolToVisibleConverter : IValueConverter
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{
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// 将 bool (或可转换为 bool 的值) 转换为 Visibility
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// parameter 支持：
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// 包含 "invert" / "inverse" / "not" / "!" 的字符串 — 反转布尔值
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// 包含 "hidden" 的字符串 — 当为 false 时返回 Visibility.Hidden 而不是 Collapsed
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public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
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{
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bool isVisible = false;
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if (value is bool b)
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{
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isVisible = b;
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}
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else if (value is bool?)
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{
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isVisible = ((bool?)value) ?? false;
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}
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else if (value is string s)
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{
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bool.TryParse(s, out isVisible);
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}
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else if (value != null)
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{
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try
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{
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isVisible = System.Convert.ToBoolean(value);
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}
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catch
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{
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isVisible = false;
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}
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}
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var paramString = parameter as string;
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bool invert = false;
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bool useHidden = false;
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if (!string.IsNullOrEmpty(paramString))
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{
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var p = paramString.ToLowerInvariant();
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if (p.Contains("invert") || p.Contains("inverse") || p.Contains("not") || p.Contains("!"))
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invert = true;
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if (p.Contains("hidden"))
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useHidden = true;
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}
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if (invert)
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isVisible = !isVisible;
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return isVisible ? Visibility.Visible : (useHidden ? Visibility.Hidden : Visibility.Collapsed);
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}
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// 将 Visibility 转换回 bool
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// Visible => true；Hidden/Collapsed => false
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// 支持与 Convert 相同的 parameter 反转语义
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public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
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{
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if (!(value is Visibility))
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return Binding.DoNothing;
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var vis = (Visibility)value;
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bool result = vis == Visibility.Visible;
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var paramString = parameter as string;
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if (!string.IsNullOrEmpty(paramString))
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{
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var p = paramString.ToLowerInvariant();
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if (p.Contains("invert") || p.Contains("inverse") || p.Contains("not") || p.Contains("!"))
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result = !result;
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}
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if (targetType == typeof(bool) || targetType == typeof(object))
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return result;
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if (targetType == typeof(bool?))
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return (bool?)result;
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try
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{
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return System.Convert.ChangeType(result, targetType);
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}
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catch
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{
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return result;
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}
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}
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}
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}
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