添加项目文件。

Util.DiagramDesigner/ViewModels/SimpleViewModel/TextDesignerItemViewModel.cs

@@ -0,0 +1,59 @@
+using Util.DiagramDesigner;
+using System.Windows.Media;
+
+namespace Util.DiagramDesigner
+{
+    public class TextDesignerItemViewModel : DesignerItemViewModelBase
+    {
+
+        public TextDesignerItemViewModel(IDiagramViewModel parent, DesignerItemBase designer) : base(parent, designer)
+        {
+
+        }
+
+        public TextDesignerItemViewModel()
+        {
+
+        }
+
+        protected override void Init()
+        {
+            base.Init();
+
+            this.ItemWidth = 150;
+            this.ClearConnectors();
+        }
+
+        protected override void ExecuteEditCommand(object param)
+        {
+            if (IsReadOnly == true) return;
+        }
+
+        private string _watermark = "请输入文本";
+        public string Watermark
+        {
+            get
+            {
+                return _watermark;
+            }
+            set
+            {
+                SetProperty(ref _watermark, value);
+            }
+        }
+
+        //固定在DataTemplate中处理
+        private bool _showText;
+        public override bool ShowText
+        {
+            get
+            {
+                return false;
+            }
+            set
+            {
+                SetProperty(ref _showText, value);
+            }
+        }
+    }
+}