画板基础基本完成

AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/TextAutoDesignerItemViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AIStudio.Wpf.DiagramDesigner.Models;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class TextAutoDesignerItemViewModel : TextDesignerItemViewModel
+    {
+        public TextAutoDesignerItemViewModel()
+        {
+        }
+
+        public TextAutoDesignerItemViewModel(IDiagramViewModel root) : base(root)
+        {
+        }
+
+        public TextAutoDesignerItemViewModel(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
+        {
+        }
+
+        public TextAutoDesignerItemViewModel(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
+        {
+        }
+
+        protected override void Init(IDiagramViewModel root, bool initNew)
+        {
+            base.Init(root, initNew);
+
+            CustomText = true;
+        }
+
+        protected override void InitNew()
+        {
+            base.InitNew();
+            this.ItemWidth = double.NaN;
+            this.ItemHeight = double.NaN;
+            this.MinItemWidth = this.MinItemHeight = FontViewModel.FontSize * 2;
+        }
+    }
+}