添加画布信息视图

Workbench/ViewModels/CanvasNodeTreeViewModel.cs

@@ -0,0 +1,41 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using Serein.Library;
+using Serein.Workbench.Services;
+using Serein.Workbench.Views;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.ViewModels
+{
+    internal partial class CanvasInfoViewModel : ObservableObject
+    {
+        private readonly FlowNodeService flowNodeService;
+
+        /// <summary>
+        /// 画布数据实体
+        /// </summary>
+        [ObservableProperty]
+        private FlowCanvasDetails _model;
+
+        public CanvasInfoViewModel(FlowNodeService flowNodeService)
+        {
+            this.flowNodeService = flowNodeService;
+            this.flowNodeService.OnViewCanvasChanged += OnViewCanvasChanged;
+        }
+
+        /// <summary>
+        /// 查看的画布发生改变
+        /// </summary>
+        /// <param name="flowCanvas"></param>
+        private void OnViewCanvasChanged(FlowCanvasView flowCanvas)
+        {
+            if (flowCanvas.DataContext is FlowCanvasViewModel vm) 
+            {
+                Model = vm.Model;
+            }
+        }
+    }
+}