分离完成 AIStudio.Wpf.DiagramModels 用于对接三分软件的模型

AIStudio.Wpf.DiagramModels/ViewModels/DiagramItemViewModel.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AIStudio.Wpf.DiagramDesigner;
+using AIStudio.Wpf.DiagramDesigner.Models;
+
+namespace AIStudio.Wpf.DiagramModels.ViewModels
+{
+    public class DiagramItemViewModel : DesignerItemViewModelBase
+    {
+        public DiagramItemViewModel() : this(null)
+        {
+        }
+
+        public DiagramItemViewModel(IDiagramViewModel root) : base(root)
+        {
+        }
+
+        public DiagramItemViewModel(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
+        {
+        }
+
+        public DiagramItemViewModel(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
+        {
+        }
+
+
+        public virtual DiagramNode ToDiagram()
+        {
+            return new DiagramNode();
+        }
+    }
+}