添加项目文件。

VisionFrame.Base/Converter/LocationConverter.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Data;
+
+namespace VisionFrame.Base.Converter
+{
+    public class LocationConverter : IMultiValueConverter
+    {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            double.TryParse(values[0].ToString(), out double w);
+            double.TryParse(values[1].ToString(), out double h);
+
+            double w1 = w * 2;
+            double h1 = h * 2;
+
+            return new Thickness((w - w1) / 2, (h - h1) / 2, 0, 0);
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+}