完成mvvm模式下，画布、节点编辑的基本重构

Library/FlowNode/FlowCanvasDetails.cs

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+using Serein.Library.Api;
+using Serein.Library.FlowNode;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Library
+{
+
+
+
+
+    /// <summary>
+    /// 流程画布
+    /// </summary>
+    [NodeProperty(ValuePath = NodeValuePath.Node)]
+    public partial class FlowCanvasDetails
+    {
+        public FlowCanvasDetails(IFlowEnvironment env)
+        {
+            Env = env;
+        }
+
+        public IFlowEnvironment Env { get; }
+
+        /// <summary>
+        /// 标识画布ID
+        /// </summary>
+        [PropertyInfo(IsProtection = true)]
+        private string _guid;
+
+        /// <summary>
+        /// 画布名称
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private string _name;
+
+        /// <summary>
+        /// 画布宽度
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _width;
+
+        /// <summary>
+        /// 画布高度
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _height;
+
+        /// <summary>
+        /// 预览位置X
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _viewX ;
+
+        /// <summary>
+        /// 预览位置Y
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _viewY ;
+
+        /// <summary>
+        /// 缩放比例X
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _scaleX  = 1; 
+
+        /// <summary>
+        /// 缩放比例Y
+        /// </summary>
+        [PropertyInfo(IsNotification = true)]
+        private double _scaleY = 1;
+
+
+        /// <summary>
+        /// 起始节点私有属性
+        /// </summary>
+        private string _startNode;
+
+       
+
+    }
+
+
+    public partial class FlowCanvasDetails
+    {
+       
+
+    }
+
+
+}