彩色连接点完成

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/ConnectorLabelModel.cs

@@ -82,27 +82,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             get; set;
         }
 
-        private bool _isSelected;
-        public override bool IsSelected
-        {
-            get
-            {
-                return _isSelected;
-            }
-            set
-            {
-                if (SetProperty(ref _isSelected, value))
-                {
-                    //如果没有文字，失去焦点自动清除
-                    if (_isSelected == false && string.IsNullOrEmpty(Text))
-                    {
-                        Connector.Labels.Remove(this);
-                    }
-                }
-
-            }
-        }
-
         public SimpleCommand DeleteLabelCommand
         {
             get; set;
@@ -196,6 +175,11 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        protected override void ClearText()
+        {
+            Connector.Labels.Remove(this);
+        }
+
         private void DeleteLabel(object parameter)
         {
             if (parameter is ConnectorLabelModel label)