功能更新

Melskin/Converters/Internal/NegativeConverter.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Melskin.Converters.Internal
+{
+    internal class NegativeConverter : IValueConverter
+    {
+        public static readonly NegativeConverter Instance = new NegativeConverter();
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            //if (value is double d) return -d;
+            //if (value is int i) return -i;
+            //if (value is float f) return -f;
+            //if (value is decimal dec) return -dec;
+            //if (value is long l) return -l;
+            if (value is Thickness thickness)
+            {
+                return new Thickness(-thickness.Left, -thickness.Top, -thickness.Right, -thickness.Bottom);
+            }
+            // 也可以使用 Convert.ToDouble 进行更通用的转换
+            return -(System.Convert.ToDouble(value));
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}