更新

WPFDark/Interfaces/IBiaHasPos.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Windows;
+
+namespace WPFDark.Interfaces
+{
+    public interface IBiaHasPos
+    {
+        Point Pos { get; set; }
+
+        bool NeedAlign { get; }
+    }
+
+    public static class BiaHasPosExtensions
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Point AlignPos(this IBiaHasPos self)
+            => self.NeedAlign ? BiaHasPosHelper.AlignPos(self.Pos) : self.Pos;
+    }
+
+    public static class BiaHasPosHelper
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static Point AlignPos(in Point pos)
+            => new Point(AlignPos(pos.X), AlignPos(pos.Y));
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static double AlignPos(double pos)
+        {
+            const double align = Internals.Constants.NodePanelAlignSize;
+
+            return Math.Round(pos / align, MidpointRounding.AwayFromZero) * align;
+        }
+    }
+}