自动布局的代码，完成中

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs

@@ -6,6 +6,7 @@ using System.ComponentModel;
 using System.Linq;
 using System.Reactive.Linq;
 using System.Windows;
+using AIStudio.Wpf.DiagramDesigner.Controls;
 using AIStudio.Wpf.DiagramDesigner.Geometrys;
 using AIStudio.Wpf.DiagramDesigner.Models;
 
@@ -442,7 +443,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return new PointBase(Left, Top);
+                return TopLeft;
+            }
+            set
+            {
+                TopLeft = value;
             }
         }
 
@@ -625,6 +630,22 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        public List<FullyCreatedConnectorInfo> InputConnectors
+        {
+            get
+            {
+                return Connectors.Where(p => p.Orientation == ConnectorOrientation.Left || p.Orientation == ConnectorOrientation.Top).ToList();
+            }
+        }
+
+        public List<FullyCreatedConnectorInfo> OutputConnectors
+        {
+            get
+            {
+                return Connectors.Where(p => p.Orientation == ConnectorOrientation.Right || p.Orientation == ConnectorOrientation.Bottom).ToList();
+            }
+        }
+
         protected ObservableCollection<CinchMenuItem> menuOptions;
         public IEnumerable<CinchMenuItem> MenuOptions
         {