Make a func on the net shape to find the corner opposite from where we clicked

EduNetworkBuilder/NetShape.cs

@@ -83,6 +83,36 @@ namespace EduNetworkBuilder
             return tCorners;
         }
 
+        public bool CornersAreClickedOn(Point ClickPoint)
+        {
+            foreach(Rectangle rec in Corners())
+            {
+                if (rec.Contains(ClickPoint))
+                    return true;
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// return the opposite point from the one clicked on.  This is so we can start
+        /// dragging from here.
+        /// </summary>
+        /// <param name="ClickPoint"></param>
+        /// <returns></returns>
+        public Point OppositePoint(Point ClickPoint)
+        {
+            int fX = ClickPoint.X;
+            int fY = ClickPoint.Y;
+            int halfWidth = InArea.Width / 2;
+            int halfHeight = InArea.Height / 2;
+            if (ClickPoint.X < InArea.X + halfWidth) fX = InArea.X;
+            else fX = InArea.X + InArea.Width;
+            if (ClickPoint.Y < InArea.Y + halfHeight) fY = InArea.Y;
+            else fY = InArea.Y + InArea.Height;
+            return new Point(fX, fY);
+
+        }
+
         public void Load(XmlNode theNode)
         {
             foreach (XmlNode Individual in theNode.ChildNodes)