箭头分离到独立的model中，方便自定义path

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IColorViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+using System.Windows.Media;
+using AIStudio.Wpf.DiagramDesigner.Geometrys;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface IColorViewModel
+    {
+        IColorObject LineColor
+        {
+            get; set;
+        }
+        IColorObject FillColor
+        {
+            get; set;
+        }
+        Color ShadowColor
+        {
+            get; set;
+        }
+        double LineWidth
+        {
+            get; set;
+        }
+        LineDashStyle LineDashStyle
+        {
+            get; set;
+        }
+        event PropertyChangedEventHandler PropertyChanged;
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IDiagramServiceProvider.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    /// <summary>
+    /// Simple service interface
+    /// </summary>
+    public interface IDiagramServiceProvider : INotifyPropertyChanged
+    {
+        IColorViewModel ColorViewModel
+        {
+            get;
+        }
+        IFontViewModel FontViewModel
+        {
+            get;
+        }
+        IShapeViewModel ShapeViewModel
+        {
+            get;
+        }
+        IDrawModeViewModel DrawModeViewModel
+        {
+            get;
+        }
+        IQuickThemeViewModel QuickThemeViewModel
+        {
+            get;
+        }
+        ILockObjectViewModel LockObjectViewModel
+        {
+            get;
+        }
+        SelectableDesignerItemViewModelBase SelectedItem
+        {
+            get; set;
+        }
+        IColorViewModel CopyDefaultColorViewModel();
+        IFontViewModel CopyDefaultFontViewModel();
+        IShapeViewModel CopyDefaultShapeViewModel();
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IDrawModeViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface IDrawModeViewModel
+    {
+        DrawMode GetDrawMode();
+        void SetDrawMode(DrawMode drawMode);
+
+        void ResetDrawMode();
+
+        CursorMode CursorMode
+        { 
+            get; set; 
+        }
+
+        DrawMode LineDrawMode
+        { 
+            get; set;
+        }
+
+        RouterMode LineRouterMode
+        {
+            get; set;
+        }
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IFontViewModel.cs

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+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Media;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface IFontViewModel
+    {
+        string FontFamily { get; set; }
+        Color FontColor { get; set; }
+        double FontSize { get; set; }  
+        Color TextEffectColor { get; set; }
+        Color HighlightColor { get; set; }
+        FontCase FontCase { get; set; }
+        FontWeight FontWeight { get; set; }
+        FontStyle FontStyle { get; set; }    
+        FontStretch FontStretch { get; set; }
+        bool Underline { get; set; }
+        bool Strikethrough { get; set; }
+        bool OverLine { get; set; }
+        HorizontalAlignment HorizontalAlignment { get; set; }
+        VerticalAlignment VerticalAlignment { get; set; }
+        double LineHeight { get; set; }
+        event PropertyChangedEventHandler PropertyChanged;
+
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/ILockObjectViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface ILockObjectViewModel
+    {
+        List<LockObject> LockObject { get; set; }
+        void SetValue(LockObject obj);
+        event PropertyChangedEventHandler PropertyChanged;
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IQuickThemeViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface IQuickThemeViewModel
+    {
+        QuickTheme[] QuickThemes { get; }
+        QuickTheme QuickTheme { get; set; }
+    }
+}

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/Interface/IShapeViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Text;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public interface IShapeViewModel
+    {
+        ILinkMarker SourceMarker
+        {
+            get; set;
+        }
+
+        ILinkMarker SinkMarker
+        {
+            get; set;
+        }
+
+        event PropertyChangedEventHandler PropertyChanged;
+    }
+
+
+}