mind 有点样子了

AIStudio.Wpf.DiagramApp/ViewModels/MindViewModel.cs

@@ -29,7 +29,8 @@ namespace AIStudio.Wpf.Flowchart
         {
             base.InitDiagramViewModel();
 
-            DiagramViewModel.GridCellSize = new Size(100, 100);   
+            DiagramViewModel.GridCellSize = new Size(100, 100);
+            DiagramViewModel.ShowGrid= false;
             _service.DrawModeViewModel.LineDrawMode = DrawMode.ConnectingLineSmooth;
             DiagramViewModel.AllowDrop = false;
         }
@@ -38,35 +39,32 @@ namespace AIStudio.Wpf.Flowchart
         {
             base.Init();
 
-            MindLevel1Node level1node = new MindLevel1Node() { Text = "思维导图" };
+            MindNode level1node = new MindNode(DiagramViewModel, Mind.NodeLevel.Level1) { Text = "思维导图" };
             DiagramViewModel.DirectAddItemCommand.Execute(level1node);
             DiagramViewModel.CenterMoveCommand.Execute(level1node);
 
-            MindLevel2Node level2node1_1 = new MindLevel2Node() { Text = "分支主题1" };
-            DiagramViewModel.DirectAddItemCommand.Execute(level2node1_1);
-            level1node.Children.Add(level2node1_1);
+            MindNode level2node1_1 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level2) { Text = "分支主题1" };
+            level1node.AddChild(level2node1_1);
 
-            MindLevel3Node level3node1_1_1 = new MindLevel3Node() { Text = "分支主题1_1" };
-            DiagramViewModel.DirectAddItemCommand.Execute(level3node1_1_1);
-            level2node1_1.Children.Add(level3node1_1_1);
+            MindNode level3node1_1_1 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level3) { Text = "分支主题1_1" };
+            level2node1_1.AddChild(level3node1_1_1);
 
-            MindLevel3Node level3node1_1_2 = new MindLevel3Node() { Text = "分支主题1_2" };
-            DiagramViewModel.DirectAddItemCommand.Execute(level3node1_1_2);
-            level2node1_1.Children.Add(level3node1_1_2);
+            MindNode level3node1_1_2 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level3) { Text = "分支主题1_2" };
+            level2node1_1.AddChild(level3node1_1_2);
 
-            MindLevel3Node level3node1_1_3 = new MindLevel3Node() { Text = "分支主题1_3" };
-            DiagramViewModel.DirectAddItemCommand.Execute(level3node1_1_3);
-            level2node1_1.Children.Add(level3node1_1_3);
+            MindNode level3node1_1_3 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level3) { Text = "分支主题1_3" };
+            level2node1_1.AddChild(level3node1_1_3);
 
-            MindLevel2Node level2node1_2 = new MindLevel2Node() { Text = "分支主题2" };
-            DiagramViewModel.DirectAddItemCommand.Execute(level2node1_2);
-            level1node.Children.Add(level2node1_2);
+            MindNode level2node1_2 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level2) { Text = "分支主题2" };
+            level1node.AddChild(level2node1_2);
 
+            MindNode level2node1_3 = new MindNode(DiagramViewModel, Mind.NodeLevel.Level2) { Text = "分支主题3" };
+            level1node.AddChild(level2node1_3);
 
-            DiagramViewModel.ClearSelectedItemsCommand.Execute(null);
-
+            DiagramViewModel.ClearSelectedItemsCommand.Execute(null);         
             level1node.LayoutUpdated();
 
+
         }
 
         public override void Dispose()

AIStudio.Wpf.DiagramDesigner/Converters/IntToBoolConverter.cs

@@ -1,24 +1,25 @@
 using System;
+using System.Windows;
 using System.Windows.Data;
 
 namespace AIStudio.Wpf.DiagramDesigner.Converters
 {
-    public class IntToBoolConverter : IValueConverter
+    public class IntToVisibilityConverter : IValueConverter
     {
         public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
         {
-            if (object.Equals(value, 0d))
-                return false;
+            if (value == null || object.Equals(value, 0))
+                return Visibility.Collapsed;
             else
-                return true;
+                return Visibility.Visible;
         }
 
         public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
         {
-            if (object.Equals(value, false))
-                return 0d;
+            if (object.Equals(value, Visibility.Collapsed))
+                return 0;
             else
-                return 1d;
+                return 1;
         }
     }
 }

AIStudio.Wpf.DiagramDesigner/Converters/IntToVisibilityConverter.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Windows.Data;
+
+namespace AIStudio.Wpf.DiagramDesigner.Converters
+{
+    public class IntToBoolConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            if (object.Equals(value, 0d))
+                return false;
+            else
+                return true;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            if (object.Equals(value, false))
+                return 0d;
+            else
+                return 1d;
+        }
+    }
+}

AIStudio.Wpf.DiagramDesigner/Geometrys/SizeBase.cs

@@ -76,6 +76,8 @@ namespace AIStudio.Wpf.DiagramDesigner.Geometrys
 
         public SizeBase Add(double value) => new SizeBase(Width + value, Height + value);
 
+        public SizeBase Add(double width, double height) => new SizeBase(Width + width, Height + height);
+
         //public bool Equals(Size size) => size != null && Width == size.Width && Height == size.Height;
 
         //public override string ToString() => $"Size(width={Width}, height={Height})";

AIStudio.Wpf.DiagramDesigner/PathGenerators/PathGenerators.Smooth.cs

@@ -6,7 +6,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 {
     public static partial class PathGenerators
     {
-        private const double _margin = 125;
+      
 
         public static PathGeneratorResult Smooth(IDiagramViewModel _, ConnectionViewModel link, PointBase[] route, PointBase source, PointBase target)
         {
@@ -74,17 +74,39 @@ namespace AIStudio.Wpf.DiagramDesigner
                 if (sourceOrientation == ConnectorOrientation.None)//按照线条的四象限来处理。
                 {
                     var slope = (route[1].Y - route[0].Y) / (route[1].X - route[0].X);
+                    if (Math.Abs(slope) < link.SmoothAutoSlope)
+                    {
+                        if (route[1].X > route[0].X)
+                        {
+                            sourceOrientation = ConnectorOrientation.Right;
+                        }
+                        else
+                        {
+                            sourceOrientation = ConnectorOrientation.Left;
+                        }
+                    }
+                    else
+                    {
+                        if (route[1].Y > route[0].Y)//Y轴方向是反的
+                        {
+                            sourceOrientation = ConnectorOrientation.Bottom;
+                        }
+                        else
+                        {
+                            sourceOrientation = ConnectorOrientation.Top;
+                        }
+                    }
                
                 }
-                var curvePointA = GetCurvePoint(route[0].X, route[0].Y, cX, cY, sourceOrientation);
-                var curvePointB = GetCurvePoint(route[1].X, route[1].Y, cX, cY, link.SinkConnectorInfo?.Orientation);
+                var curvePointA = GetCurvePoint(route[0].X, route[0].Y, cX, cY, link.SmoothMargin, sourceOrientation);
+                var curvePointB = GetCurvePoint(route[1].X, route[1].Y, cX, cY, link.SmoothMargin, link.SinkConnectorInfo?.Orientation);
                 return new[] { route[0], curvePointA, curvePointB, route[1] };
             }
         }
 
-        private static PointBase GetCurvePoint(double pX, double pY, double cX, double cY, ConnectorOrientation? alignment)
+        private static PointBase GetCurvePoint(double pX, double pY, double cX, double cY, double smoothMargin, ConnectorOrientation? alignment)
         {
-            var margin = Math.Min(_margin, Math.Pow(Math.Pow(pX - cX, 2) + Math.Pow(pY - cY, 2), .5));
+            var margin = Math.Min(smoothMargin, Math.Pow(Math.Pow(pX - cX, 2) + Math.Pow(pY - cY, 2), .5));
             switch (alignment)
             {
                 case ConnectorOrientation.Top: return new PointBase(pX, Math.Min(pY - margin, cY));

AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml

@@ -301,13 +301,15 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
                 <Setter Property="s:ItemConnectProps.EnabledForConnection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForConnection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="Width"
                                     Value="{Binding ItemWidth}" />
                 <Setter Property="Height"
-                                    Value="{Binding ItemHeight}" />
+                                    Value="{Binding ItemHeight}" />            
                 <Setter Property="SnapsToDevicePixels"
                                     Value="True" />
                 <Setter Property="ContentTemplate">
@@ -351,7 +353,7 @@
                                                                 VerticalAlignment="Stretch"
                                                                 Content="{TemplateBinding Content}" />
 
-                                    <Control x:Name="PART_Text" Margin="5" IsHitTestVisible="{Binding IsReadOnlyText,Converter={StaticResource InvertBoolConverter}}">
+                                    <Control x:Name="PART_Text" Margin="1" IsHitTestVisible="{Binding IsReadOnlyText,Converter={StaticResource InvertBoolConverter}}">
                                         <Control.Style>
                                             <Style TargetType="Control">
                                                 <Setter Property="Template">
@@ -458,7 +460,9 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="ContentTemplate">
                     <Setter.Value>
                         <DataTemplate>
@@ -569,9 +573,11 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
                 <Setter Property="s:ItemConnectProps.EnabledForConnection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForConnection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="Width"
                                     Value="{Binding ItemWidth}" />
                 <Setter Property="Height"
@@ -647,9 +653,11 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
                 <Setter Property="s:ItemConnectProps.EnabledForConnection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForConnection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="Width"
                                     Value="{Binding ItemWidth}" />
                 <Setter Property="Height"
@@ -726,7 +734,9 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="Width"
                                     Value="{Binding ItemWidth}" />
                 <Setter Property="Height"
@@ -770,9 +780,11 @@
                 <Setter Property="Canvas.ZIndex"
                                     Value="{Binding ZIndex}" />
                 <Setter Property="s:SelectionProps.EnabledForSelection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForSelection}" />
                 <Setter Property="s:ItemConnectProps.EnabledForConnection"
-                                    Value="True" />
+                                    Value="{Binding EnabledForConnection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
                 <Setter Property="Width"
                                     Value="{Binding ItemWidth}" />
                 <Setter Property="Height"

AIStudio.Wpf.DiagramDesigner/ViewModels/AdditionViewModel/ShapeViewModel.cs

@@ -174,6 +174,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 if (SetProperty(ref _sizeStyle, value))
                 {
                     Width = (double)_sizeStyle;
+                    Height = (double)_sizeStyle;
                 }
             }
         }

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs

@@ -57,7 +57,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             if (sinkConnectorInfo is FullyCreatedConnectorInfo sink && sink.DataItem.ShowArrow == false)
             {
-                this.ShapeViewModel.SinkMarker = LinkMarker.None;
+                this.ShapeViewModel.SinkMarker = new LinkMarker("", 10, 10, ArrowPathStyle.None, ArrowSizeStyle.Middle);
             }
             this.ColorViewModel.PropertyChanged += ConnectorViewModel_PropertyChanged;
             this.ShapeViewModel.PropertyChanged += ConnectorViewModel_PropertyChanged;
@@ -398,6 +398,10 @@ namespace AIStudio.Wpf.DiagramDesigner
             RaisePropertyChanged(nameof(IsFullConnection));
         }
 
+        public double SmoothMargin { get; set; } = 125;
+
+        public double SmoothAutoSlope { get; set; } = 1;
+
         public bool IsPortless => SourceConnectorInfo.IsPortless || SinkConnectorInfoFully?.IsPortless == true;
         #endregion
 
@@ -445,13 +449,13 @@ namespace AIStudio.Wpf.DiagramDesigner
                         break;
                     case nameof(SourceConnectorInfo):
                         SourceA = PointHelper.GetPointForConnector(SourceConnectorInfo);
-                        (SourceConnectorInfo.DataItem as INotifyPropertyChanged).PropertyChanged += new WeakINPCEventHandler(ConnectorViewModel_PropertyChanged).Handler;
+                        SourceConnectorInfo.DataItem.PropertyChanged += new WeakINPCEventHandler(ConnectorViewModel_PropertyChanged).Handler;
                         break;
                     case nameof(SinkConnectorInfo):
                         SourceB = SinkConnectorInfo.Position;
                         if (SinkConnectorInfo is FullyCreatedConnectorInfo)
                         {
-                            (((FullyCreatedConnectorInfo)SinkConnectorInfo).DataItem as INotifyPropertyChanged).PropertyChanged += new WeakINPCEventHandler(ConnectorViewModel_PropertyChanged).Handler;
+                            SinkConnectorInfoFully.DataItem.PropertyChanged += new WeakINPCEventHandler(ConnectorViewModel_PropertyChanged).Handler;
                         }
                         break;
                     case nameof(IsSelected):

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs

@@ -304,6 +304,32 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         public bool ShowArrow { get; set; } = true;
 
+        private bool enabledForConnection = true;
+        public bool EnabledForConnection
+        {
+            get
+            {
+                return enabledForConnection;
+            }
+            set
+            {
+                SetProperty(ref enabledForConnection, value);
+            }
+        }
+
+        private bool enabledForSelection = true;
+        public bool EnabledForSelection
+        {
+            get
+            {
+                return enabledForSelection;
+            }
+            set
+            {
+                SetProperty(ref enabledForSelection, value);
+            }
+        }
+
         private double _left;
         [CanDo]
         public double Left

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
@@ -742,7 +743,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         #endregion
 
-        private DoCommandManager DoCommandManager = new DoCommandManager();   
+        private DoCommandManager DoCommandManager = new DoCommandManager();
 
         public event DiagramEventHandler Event;
 
@@ -899,7 +900,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 {
                     //加入ReDo
                     DoCommandManager.DoNewCommand(sender.ToString() + e.PropertyName, () => Do(sender, e.PropertyName, valuePropertyChangedEventArgs.NewValue), () => UnDo(sender, e.PropertyName, valuePropertyChangedEventArgs.OldValue), null, false);
-                 
+
                     Event?.Invoke(sender, new DiagramEventArgs(valuePropertyChangedEventArgs.PropertyName, valuePropertyChangedEventArgs.NewValue, valuePropertyChangedEventArgs.OldValue, selectable?.Id));
                 }
             }
@@ -992,7 +993,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     Items.Remove(ite);
                 });
             }
-            else if (parameter is List<SelectableDesignerItemViewModelBase> items)
+            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
             {
                 if (items.Select(p => AddVerify(p)).Any() != true) return;
 
@@ -1005,7 +1006,10 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                 },
                 () => {
-                    items.ForEach(item => Items.Remove(item));
+                    foreach (var item in items)
+                    {
+                        Items.Remove(item);
+                    }
                 });
             }
         }
@@ -1016,7 +1020,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 ite.IsSelected = false;
                 Items.Remove(ite);
             }
-            else if (parameter is List<SelectableDesignerItemViewModelBase> items)
+            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
             {
                 foreach (var item in items)
                 {
@@ -1038,7 +1042,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     Items.Add(ite);
                 });
             }
-            else if (parameter is List<SelectableDesignerItemViewModelBase> items)
+            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
             {
                 DoCommandManager.DoNewCommand(this.ToString(),
                 () => {
@@ -1060,8 +1064,22 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteClearSelectedItemsCommand(object parameter)
         {
-            ClearSelectedItems();
+            IEnumerable<SelectableDesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems)
+            {
+                item.IsSelected = false;
+            }
         }
+
         public void ClearSelectedItems()
         {
             foreach (var item in this.Items.ToList())
@@ -1081,7 +1099,15 @@ namespace AIStudio.Wpf.DiagramDesigner
         #region 布局
         private void ExecuteAlignTopCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1113,7 +1139,15 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteAlignVerticalCentersCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1145,7 +1179,16 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteAlignBottomCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1177,7 +1220,16 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteAlignLeftCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1209,7 +1261,16 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteAlignHorizontalCentersCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1241,7 +1302,16 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteAlignRightCommand(object parameter)
         {
-            var selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1274,7 +1344,15 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteBringForwardCommand(object parameter)
         {
-            List<SelectableDesignerItemViewModelBase> ordered = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            List<SelectableDesignerItemViewModelBase> ordered;
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                ordered = para.OrderByDescending(p => p.ZIndex).ToList();
+            }
+            else
+            {
+                ordered = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            }
 
             List<SelectableDesignerItemViewModelBase> changeditems = new List<SelectableDesignerItemViewModelBase>();
             var guid = Guid.NewGuid();
@@ -1323,7 +1401,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteBringToFrontCommand(object parameter)
         {
-            List<SelectableDesignerItemViewModelBase> selectionSorted = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            List<SelectableDesignerItemViewModelBase> selectionSorted;
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                selectionSorted = para.OrderByDescending(p => p.ZIndex).ToList();
+            }
+            else
+            {
+                selectionSorted = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            }
+
             List<SelectableDesignerItemViewModelBase> childrenSorted = Items.OrderByDescending(p => p.ZIndex).ToList();
 
             List<SelectableDesignerItemViewModelBase> changeditems = new List<SelectableDesignerItemViewModelBase>();
@@ -1363,7 +1450,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteSendBackwardCommand(object parameter)
         {
-            List<SelectableDesignerItemViewModelBase> ordered = this.SelectedItems.OrderBy(p => p.ZIndex).ToList();
+            List<SelectableDesignerItemViewModelBase> ordered;
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                ordered = para.OrderBy(p => p.ZIndex).ToList();
+            }
+            else
+            {
+                ordered = SelectedItems.OrderBy(p => p.ZIndex).ToList();
+            }
+
             int count = this.Items.Count;
 
             List<SelectableDesignerItemViewModelBase> changeditems = new List<SelectableDesignerItemViewModelBase>();
@@ -1412,7 +1508,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteSendToBackCommand(object parameter)
         {
-            List<SelectableDesignerItemViewModelBase> selectionSorted = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            List<SelectableDesignerItemViewModelBase> selectionSorted;
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                selectionSorted = para.OrderByDescending(p => p.ZIndex).ToList();
+            }
+            else
+            {
+                selectionSorted = SelectedItems.OrderByDescending(p => p.ZIndex).ToList();
+            }
+
             List<SelectableDesignerItemViewModelBase> childrenSorted = Items.OrderByDescending(p => p.ZIndex).ToList();
 
             List<SelectableDesignerItemViewModelBase> changeditems = new List<SelectableDesignerItemViewModelBase>();
@@ -1452,10 +1557,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteDistributeHorizontalCommand(object parameter)
         {
-            var selectedItems = from item in this.SelectedItems.OfType<DesignerItemViewModelBase>()
-                                where item.ParentId == Guid.Empty
-                                orderby item.Left
-                                select item;
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para.Where(p => p.ParentId == Guid.Empty).OrderBy(p => p.Left);
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>().Where(p => p.ParentId == Guid.Empty).OrderBy(p => p.Left);
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1509,10 +1620,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         private void ExecuteDistributeVerticalCommand(object parameter)
         {
-            var selectedItems = from item in this.SelectedItems.OfType<DesignerItemViewModelBase>()
-                                where item.ParentId == Guid.Empty
-                                orderby item.Top
-                                select item;
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para.Where(p => p.ParentId == Guid.Empty).OrderBy(p => p.Top);
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>().Where(p => p.ParentId == Guid.Empty).OrderBy(p => p.Top);
+            }
+
             var guid = Guid.NewGuid();
 
             if (selectedItems.Count() > 1)
@@ -1568,11 +1685,21 @@ namespace AIStudio.Wpf.DiagramDesigner
         #region 复制，粘贴
         private void ExecuteCopyCommand(object parameter)
         {
-            List<DesignerItemViewModelBase> selectedDesignerItems =
-           SelectedItems.OfType<DesignerItemViewModelBase>().ToList();
+            List<DesignerItemViewModelBase> selectedDesignerItems;
+
+            List<ConnectionViewModel> selectedConnections;
+
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                selectedDesignerItems = para.OfType<DesignerItemViewModelBase>().ToList();
+                selectedConnections = para.OfType<ConnectionViewModel>().ToList();
+            }
+            else
+            {
+                selectedDesignerItems = SelectedItems.OfType<DesignerItemViewModelBase>().ToList();
+                selectedConnections = SelectedItems.OfType<ConnectionViewModel>().ToList();
+            }
 
-            List<ConnectionViewModel> selectedConnections =
-                SelectedItems.OfType<ConnectionViewModel>().ToList();
 
             foreach (ConnectionViewModel connection in Items.OfType<ConnectionViewModel>())
             {
@@ -1712,7 +1839,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteDeleteCommand(object parameter)
         {
-            List<SelectableDesignerItemViewModelBase> itemsToRemove = SelectedItems.OfType<SelectableDesignerItemViewModelBase>().ToList();
+            List<SelectableDesignerItemViewModelBase> itemsToRemove;
+
+            if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
+            {
+                itemsToRemove = para.OfType<SelectableDesignerItemViewModelBase>().ToList();
+            }
+            else
+            {
+                itemsToRemove = SelectedItems.OfType<SelectableDesignerItemViewModelBase>().ToList();
+            }
+
             List<SelectableDesignerItemViewModelBase> connectionsToAlsoRemove = new List<SelectableDesignerItemViewModelBase>();
 
             foreach (var connector in Items.OfType<ConnectionViewModel>())
@@ -1737,7 +1874,17 @@ namespace AIStudio.Wpf.DiagramDesigner
         #region 移动
         private void ExecuteLeftMoveCommand(object parameter)
         {
-            foreach (var item in SelectedItems.OfType<DesignerItemViewModelBase>())
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
             {
                 item.Left -= 0.5;
             }
@@ -1745,7 +1892,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteRightMoveCommand(object parameter)
         {
-            foreach (var item in SelectedItems.OfType<DesignerItemViewModelBase>())
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
             {
                 item.Left += 0.5;
             }
@@ -1753,7 +1910,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteUpMoveCommand(object parameter)
         {
-            foreach (var item in SelectedItems.OfType<DesignerItemViewModelBase>())
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
             {
                 item.Top -= 0.5;
             }
@@ -1761,7 +1928,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteDownMoveCommand(object parameter)
         {
-            foreach (var item in SelectedItems.OfType<DesignerItemViewModelBase>())
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
             {
                 item.Top += 0.5;
             }
@@ -1769,7 +1946,17 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void ExecuteCenterMoveCommand(object parameter)
         {
-            foreach (var item in SelectedItems.OfType<DesignerItemViewModelBase>())
+            IEnumerable<DesignerItemViewModelBase> selectedItems;
+            if (parameter is IEnumerable<DesignerItemViewModelBase> para)
+            {
+                selectedItems = para;
+            }
+            else
+            {
+                selectedItems = this.SelectedItems.OfType<DesignerItemViewModelBase>();
+            }
+
+            foreach (var item in selectedItems.OfType<DesignerItemViewModelBase>())
             {
                 item.Left = (PageSize.Width - item.ItemWidth) / 2;
                 item.Top = (PageSize.Height - item.ItemHeight) / 2;
@@ -1780,7 +1967,6 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             List<SelectableDesignerItemViewModelBase> ordered = Items.OrderBy(p => p.ZIndex).ToList();
 
-
             for (int i = 0; i < ordered.Count; i++)
             {
                 ordered[i].ZIndex = i;

AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/SelectableViewModelBase.cs

@@ -166,6 +166,19 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        private bool _visible = true;
+        public bool Visible
+        {
+            get
+            {
+                return _visible;
+            }
+            set
+            {
+                SetProperty(ref _visible, value);
+            }
+        }
+
         private int _zIndex;
         [Browsable(true)]
         [CanDo]

AIStudio.Wpf.Mind/Themes/MindNode.xaml

@@ -5,32 +5,139 @@
 
     <dd:ColorBrushConverter x:Key="ColorBrushConverter"/>
     <dd:DoubleToCornerRadius x:Key="DoubleToCornerRadius"/>
+    <dd:IntToVisibilityConverter x:Key="IntToVisibilityConverter"/>
+
+    <!-- Toggle Button -->
+    <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
+        <Setter Property="Focusable" Value="False"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ToggleButton">
+                    <Grid Width="17" Height="17" SnapsToDevicePixels="True">
+                        <Rectangle Width="13" Height="13" Stroke="Gray" RadiusX="6" RadiusY="6" SnapsToDevicePixels="true">
+                            <Rectangle.Fill>
+                                <LinearGradientBrush EndPoint="0.5,2" StartPoint="0.5,0">
+                                    <GradientStop Color="White" Offset="0"/>
+                                    <GradientStop Color="Silver" Offset="0.5"/>
+                                    <GradientStop Color="LightGray" Offset="1"/>
+                                </LinearGradientBrush>
+                            </Rectangle.Fill>
+                        </Rectangle>
+                        <Rectangle x:Name="ExpandPath" Width="1" Height="9" Stroke="Gray" SnapsToDevicePixels="true" />
+                        <Rectangle Width="9" Height="1" Stroke="Gray" SnapsToDevicePixels="true"/>
+                    </Grid>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsChecked" Value="True">
+                            <Setter Property="Visibility"  TargetName="ExpandPath" Value="Collapsed"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <ControlTemplate x:Key="MindLevel1NodeStyle" TargetType="{x:Type ContentControl}">
+        <Grid >
+            <Grid.ContextMenu>
+                <ContextMenu ItemsSource="{Binding MenuOptions}">
+                    <ContextMenu.ItemContainerStyle>
+                        <Style TargetType="MenuItem">
+                            <Setter Property="MenuItem.Header" Value="{Binding Text}" />
+                            <Setter Property="MenuItem.ItemsSource" Value="{Binding Children}" />
+                            <Setter Property="MenuItem.Command" Value="{Binding Command}" />
+                            <Setter Property="MenuItem.Icon" Value="{Binding Icon}" />
+                            <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
+                            <Setter Property="MenuItem.IsCheckable" Value="{Binding IsCheckable}" />
+                            <Setter Property="MenuItem.IsChecked" Value="{Binding IsChecked}" />
+                        </Style>
+                    </ContextMenu.ItemContainerStyle>
+                </ContextMenu>
+            </Grid.ContextMenu>
+            <Grid IsHitTestVisible="False">
+                <Border BorderThickness="1" 
+                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
+                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"
+                        CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">
+                </Border>
+            </Grid>
+        </Grid>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="MindLevel2NodeStyle" TargetType="{x:Type ContentControl}">
+        <Grid>
+            <Grid.ContextMenu>
+                <ContextMenu ItemsSource="{Binding MenuOptions}">
+                    <ContextMenu.ItemContainerStyle>
+                        <Style TargetType="MenuItem">
+                            <Setter Property="MenuItem.Header" Value="{Binding Text}" />
+                            <Setter Property="MenuItem.ItemsSource" Value="{Binding Children}" />
+                            <Setter Property="MenuItem.Command" Value="{Binding Command}" />
+                            <Setter Property="MenuItem.Icon" Value="{Binding Icon}" />
+                            <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
+                            <Setter Property="MenuItem.IsCheckable" Value="{Binding IsCheckable}" />
+                            <Setter Property="MenuItem.IsChecked" Value="{Binding IsChecked}" />
+                        </Style>
+                    </ContextMenu.ItemContainerStyle>
+                </ContextMenu>
+            </Grid.ContextMenu>
+            <Grid  IsHitTestVisible="False">
+                <Border BorderThickness="1" 
+                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
+                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"
+                        CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">
+                </Border>
+            </Grid>
+            <ToggleButton IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
+        </Grid>
+    </ControlTemplate>
+
+    <ControlTemplate x:Key="MindLevel3NodeStyle" TargetType="{x:Type ContentControl}">
+        <Grid>
+            <Grid.ContextMenu>
+                <ContextMenu ItemsSource="{Binding MenuOptions}">
+                    <ContextMenu.ItemContainerStyle>
+                        <Style TargetType="MenuItem">
+                            <Setter Property="MenuItem.Header" Value="{Binding Text}" />
+                            <Setter Property="MenuItem.ItemsSource" Value="{Binding Children}" />
+                            <Setter Property="MenuItem.Command" Value="{Binding Command}" />
+                            <Setter Property="MenuItem.Icon" Value="{Binding Icon}" />
+                            <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
+                            <Setter Property="MenuItem.IsCheckable" Value="{Binding IsCheckable}" />
+                            <Setter Property="MenuItem.IsChecked" Value="{Binding IsChecked}" />
+                        </Style>
+                    </ContextMenu.ItemContainerStyle>
+                </ContextMenu>
+            </Grid.ContextMenu>
+            <Grid IsHitTestVisible="False">
+                <Border BorderThickness="0,0,0,1" 
+                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
+                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}">
+
+                </Border>
+            </Grid>
+            <ToggleButton IsChecked="{Binding IsExpanded}" Style="{StaticResource ExpandCollapseToggleStyle}" HorizontalAlignment="Left" Margin="-15,0,0,0" Visibility="{Binding Children.Count,Converter={StaticResource IntToVisibilityConverter}}"/>
+        </Grid>
+    </ControlTemplate>
+
+    <Style x:Key="MindNodeStyle" TargetType="{x:Type ContentControl}">
+        <Setter Property="Template" Value="{StaticResource MindLevel1NodeStyle}" />
+        <Style.Triggers>
+            <DataTrigger Binding="{Binding NodeLevel}" Value="Level1">
+                <Setter Property="Template" Value="{StaticResource MindLevel1NodeStyle}" />
+            </DataTrigger>
+            <DataTrigger Binding="{Binding NodeLevel}" Value="Level2">
+                <Setter Property="Template" Value="{StaticResource MindLevel2NodeStyle}" />
+            </DataTrigger>
+            <DataTrigger Binding="{Binding NodeLevel}" Value="Level3">
+                <Setter Property="Template" Value="{StaticResource MindLevel3NodeStyle}" />
+            </DataTrigger>
+        </Style.Triggers>
+    </Style>
 
     <DataTemplate DataType="{x:Type viewmodel:MindNode}">
         <Grid IsHitTestVisible="False">
-            <Grid>
-                <Border BorderThickness="1" 
-                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
-                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"
-                        CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">
-
-                </Border>
-            </Grid>
-        </Grid>
-
-    </DataTemplate>
-    <DataTemplate DataType="{x:Type viewmodel:MindLevel1Node}">
-        <Grid IsHitTestVisible="False">
-            <Grid>
-                <Border BorderThickness="1" 
-                        BorderBrush="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" 
-                        Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"
-                        CornerRadius="{Binding CornerRadius,Converter={StaticResource DoubleToCornerRadius}}">
-
-                </Border>
-            </Grid>
+            <ContentControl Style="{StaticResource MindNodeStyle}"/>
         </Grid>
     </DataTemplate>
 
-
 </ResourceDictionary>

AIStudio.Wpf.Mind/ViewModels/MindNode.cs

@@ -1,9 +1,13 @@
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.ComponentModel;
+using System.IO;
 using System.Linq;
 using System.Text;
+using System.Windows.Media;
 using AIStudio.Wpf.DiagramDesigner;
+using AIStudio.Wpf.DiagramDesigner.Algorithms;
 using AIStudio.Wpf.DiagramDesigner.Geometrys;
 using AIStudio.Wpf.DiagramDesigner.Models;
 
@@ -13,12 +17,12 @@ namespace AIStudio.Wpf.Mind.ViewModels
     {
         public MindNode(NodeLevel nodeLevel) : this(null, nodeLevel)
         {
-
         }
 
         public MindNode(IDiagramViewModel root, NodeLevel nodeLevel) : base(root)
         {
             NodeLevel = nodeLevel;
+            LevelInit(true);
         }
 
         public MindNode(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
@@ -29,6 +33,90 @@ namespace AIStudio.Wpf.Mind.ViewModels
         {
         }
 
+        protected override void Init(IDiagramViewModel root)
+        {
+            base.Init(root);
+
+            EnabledForConnection = false;
+
+            AddChildCommand = new SimpleCommand(Command_Enable, ExecuteAddChildCommand);
+            AddParentCommand = new SimpleCommand(Level_Enable, ExecuteAddParentCommand);
+            AddPeerCommand = new SimpleCommand(Level_Enable, ExecuteAddPeerCommand);
+            DeleteCommand = new SimpleCommand(Command_Enable, ExecuteDeleteCommand);
+            MoveForwardCommand = new SimpleCommand(Command_Enable, ExecuteMoveForwardCommand);
+            MoveBackCommand = new SimpleCommand(Command_Enable, ExecuteMoveBackCommand);
+            BuildMenuOptions();
+
+            this.PropertyChanged += this.Item_PropertyChanged;
+        }
+
+        private void LevelInit(bool init =false)
+        {
+            switch (NodeLevel)
+            {
+                case NodeLevel.Level1:
+                    {
+                        ItemWidth = 110;
+                        ItemHeight = 40;
+                        this.ClearConnectors();
+                        var port = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.None, true) { XRatio = 0.5, YRatio = 0.5 };
+                        this.AddConnector(port);
+                        IsInnerConnector = true;
+
+                        ColorViewModel.FillColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
+                        ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
+                        FontViewModel.FontColor = Colors.White;
+                        FontViewModel.FontSize = 15;
+                        Spacing = new SizeBase(50, 15);
+                        ShapeViewModel.SinkMarker.PathStyle = ArrowPathStyle.Circle;
+                        ShapeViewModel.SinkMarker.SizeStyle = ArrowSizeStyle.VerySmall;
+
+                        break;
+                    }
+                case NodeLevel.Level2:
+                    {
+                        ItemWidth = 80;
+                        ItemHeight = 25;
+                        this.ClearConnectors();
+                        var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 0.5 };
+                        this.AddConnector(port1);
+                        var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 0.5 };
+                        this.AddConnector(port2);
+                        IsInnerConnector = true;
+
+                        ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
+                        ShapeViewModel.SinkMarker.PathStyle = ArrowPathStyle.None;
+                        ShapeViewModel.SinkMarker.SizeStyle = ArrowSizeStyle.VerySmall;
+                        break;
+                    }
+                case NodeLevel.Level3:
+                    {
+                        ItemWidth = 80;
+                        ItemHeight = 25;
+                        this.ClearConnectors();
+                        var port1 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Left, true) { XRatio = 0, YRatio = 1 };
+                        this.AddConnector(port1);
+                        var port2 = new FullyCreatedConnectorInfo(Root, this, ConnectorOrientation.Right, true) { XRatio = 1, YRatio = 1 };
+                        this.AddConnector(port2);
+                        IsInnerConnector = true;
+
+                        ColorViewModel.LineColor.Color = Color.FromRgb(0x73, 0xa1, 0xbf);
+                        ShapeViewModel.SinkMarker.PathStyle = ArrowPathStyle.None;
+                        ShapeViewModel.SinkMarker.SizeStyle = ArrowSizeStyle.VerySmall;
+                        break;
+                    }
+            }
+        }
+
+
+
+        private bool Level_Enable(object obj)
+        {
+            if (Command_Enable(obj) == false) return false;
+
+            return NodeLevel != NodeLevel.Level1;
+        }
+
         [Browsable(false)]
         public NodeLevel NodeLevel
         {
@@ -48,10 +136,28 @@ namespace AIStudio.Wpf.Mind.ViewModels
             }
         }
 
-        public double Spacing
+        private bool _isExpanded = true;
+        public bool IsExpanded
+        {
+            get
+            {
+                return _isExpanded;
+            }
+            set
+            {
+                SetProperty(ref _isExpanded, value);
+            }
+        }
+
+        public bool LayoutUpdating
         {
             get; set;
-        } = 20;
+        }
+
+        public SizeBase Spacing
+        {
+            get; set;
+        } = new SizeBase(15, 15);
 
         public List<MindNode> Children
         {
@@ -62,170 +168,357 @@ namespace AIStudio.Wpf.Mind.ViewModels
         {
             get
             {
-                return this.Size.Add(Spacing * 2);
+                return this.Size.Add(Spacing.Width * 2, Spacing.Height * 2);
             }
         }
 
         public SizeBase DesiredSize
         {
-            get;set;
+            get; set;
         }
 
-        public SizeBase MeasureOverride()
+        public PointBase DesiredPosition
         {
-            var sizewithSpacing = SizeWithSpacing;
-            if (Children?.Count > 0)
+            get; set;
+        }
+
+        public PointBase Offset
+        {
+            get; set;
+        }
+
+        public SimpleCommand AddParentCommand
+        {
+            get; private set;
+        }
+
+        public SimpleCommand AddChildCommand
+        {
+            get; private set;
+        }
+
+        public SimpleCommand AddPeerCommand
+        {
+            get; private set;
+        }
+
+        public SimpleCommand DeleteCommand
+        {
+            get; private set;
+        }
+
+        public SimpleCommand MoveForwardCommand
+        {
+            get; private set;
+        }
+
+        public SimpleCommand MoveBackCommand
+        {
+            get; private set;
+        }
+
+        private void BuildMenuOptions()
+        {
+            menuOptions = new ObservableCollection<CinchMenuItem>();
+            CinchMenuItem menuItem = new CinchMenuItem();
+            menuItem.Text = "下级";
+            menuItem.Command = AddChildCommand;
+            menuOptions.Add(menuItem);
+            menuItem = new CinchMenuItem();
+            menuItem.Text = "同级";
+            menuItem.Command = AddPeerCommand;
+            menuOptions.Add(menuItem);
+            //menuItem = new CinchMenuItem();
+            //menuItem.Text = "上级";
+            //menuItem.Command = AddParentCommand;
+            //menuOptions.Add(menuItem);
+            menuItem = new CinchMenuItem();
+            menuItem.Text = "前移";
+            menuItem.Command = MoveForwardCommand;
+            menuOptions.Add(menuItem);
+            menuItem = new CinchMenuItem();
+            menuItem.Text = "后移";
+            menuItem.Command = MoveBackCommand;
+            menuOptions.Add(menuItem);
+            menuItem = new CinchMenuItem();
+            menuItem.Text = "删除";
+            menuItem.Command = DeleteCommand;
+            menuOptions.Add(menuItem);
+        }
+
+        public void ExecuteAddChildCommand(object obj)
+        {
+            if (obj is MindNode node)
             {
-                var childrensizes = Children.Select(p => p.MeasureOverride()).ToArray();
-                sizewithSpacing = new SizeBase(sizewithSpacing.Width + childrensizes.Max(p => p.Width), Math.Max(sizewithSpacing.Height, childrensizes.Sum(p => p.Height)));
             }
-            DesiredSize = sizewithSpacing;
-            return DesiredSize;
+            else
+            {
+                if (NodeLevel == NodeLevel.Level1)
+                    node = new MindNode(Root, NodeLevel.Level2) { Text = "分支主题" };
+                else
+                    node = new MindNode(Root, NodeLevel.Level3) { Text = "分支主题" };
+            }
+            AddChild(node);
+
+            LayoutUpdated();
+        }
+
+        public void ExecuteAddParentCommand(object obj)
+        {
+            if (Parent is MindNode parent)
+            {
+                if (obj is MindNode node)
+                {
+                }
+                else
+                {
+                    if (NodeLevel == NodeLevel.Level1)
+                    {
+                        return;
+                    }
+                    else if (NodeLevel == NodeLevel.Level2)
+                        node = new MindNode(Root, NodeLevel.Level2) { Text = "分支主题" };
+                    else
+                        node = new MindNode(Root, NodeLevel.Level3) { Text = "分支主题" };
+                }
+
+                parent.RemoveChild(this);
+                int index = parent.Children.IndexOf(this);
+                parent.AddChild(node, index + 1);
+                node.AddChild(this);
+
+                LayoutUpdated();
+            }
+        }
+
+        public void ExecuteAddPeerCommand(object obj)
+        {
+            if (Parent is MindNode parent)
+            {
+                if (obj is MindNode node)
+                {
+                }
+                else
+                {
+                    if (NodeLevel == NodeLevel.Level1)
+                    {
+                        return;
+                    }
+                    else if (NodeLevel == NodeLevel.Level2)
+                        node = new MindNode(Root, NodeLevel.Level2) { Text = "分支主题" };
+                    else
+                        node = new MindNode(Root, NodeLevel.Level3) { Text = "分支主题" };
+                }
+                int index = parent.Children.IndexOf(this);
+                parent.AddChild(node, index + 1);
+
+                LayoutUpdated();
+            }
+        }
+
+        private void ExecuteMoveBackCommand(object obj)
+        {
+            if (Parent is MindNode parent)
+            {
+                int index = parent.Children.IndexOf(this);
+                if (index < parent.Children.Count - 1)
+                {
+                    parent.RemoveChild(this);
+                    parent.AddChild(this, index + 1);
+                    LayoutUpdated();
+                }
+            }
+        }
+
+        private void ExecuteMoveForwardCommand(object obj)
+        {
+            if (Parent is MindNode parent)
+            {
+                int index = parent.Children.IndexOf(this);
+                if (index > 0)
+                {
+                    parent.RemoveChild(this);
+                    parent.AddChild(this, index - 1);
+                    LayoutUpdated();
+                }
+            }
+        }
+
+        private void ExecuteDeleteCommand(object obj)
+        {
+            if (Parent is MindNode parent)
+            {
+                parent.RemoveChild(this);
+                LayoutUpdated();
+            }
+        }
+
+        public void AddChild(MindNode item, int index = -1)
+        {
+            if (index >= 0)
+            {
+                this.Children.Insert(index, item);
+            }
+            else
+            {
+                this.Children.Add(item);
+            }
+            item.Parent = this;
+            //item.ParentId = this.Id;
+            Root?.DirectAddItemCommand.Execute(item);
+
+            ConnectionViewModel connector = new ConnectionViewModel(Root, this.Connectors.FirstOrDefault(), item.Connectors.FirstOrDefault());
+            connector.ColorViewModel.LineColor = this.ColorViewModel.LineColor;
+            connector.SmoothMargin = 20;
+            connector.SmoothAutoSlope = 0.2;
+            connector.ShapeViewModel.SinkMarker.PathStyle = this.ShapeViewModel.SinkMarker.PathStyle;
+            connector.ShapeViewModel.SinkMarker.SizeStyle = this.ShapeViewModel.SinkMarker.SizeStyle;
+
+            Root?.DirectAddItemCommand.Execute(connector);
+
+            Root?.BringForwardCommand.Execute(new DesignerItemViewModelBase[] { item });
+
+            Root?.ClearSelectedItemsCommand.Execute(new SelectableDesignerItemViewModelBase[] { connector });
+        }
+
+        public void RemoveChild(MindNode item)
+        {
+            item.PropertyChanged -= Item_PropertyChanged;
+
+            this.Children.Remove(item);
+
+            var connectors = Root?.Items.OfType<ConnectionViewModel>().Where(p => p.SinkConnectorInfoFully?.DataItem == item).ToList();
+
+            Root?.DirectRemoveItemCommand.Execute(item);
+            Root?.DirectRemoveItemCommand.Execute(connectors);
+            if (item.Children?.Count > 0)
+            {
+                foreach (var child in item.Children.ToList())
+                {
+                    item.RemoveChild(child);
+                }
+            }
+        }
+
+        public MindNode GetLevel1Node()
+        {
+            var node = this;
+            while (node.Parent is MindNode mindNode)
+            {
+                node = mindNode;
+            }
+            return node;
+        }
+
+        private void Item_PropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            switch (e.PropertyName)
+            {
+                case nameof(IsExpanded):
+                    GetLevel1Node()?.LayoutUpdated();
+                    break;
+                case nameof(NodeLevel):
+                    LevelInit();
+                    break;
+                case nameof(Left):
+                    {
+
+                        if (e is ValuePropertyChangedEventArgs valuePropertyChangedEventArgs)
+                        {
+                            if (NodeLevel == NodeLevel.Level1)
+                            {
+                                LayoutUpdated();
+                            }
+                            else
+                            {
+                                UpdateOffsetX((double)valuePropertyChangedEventArgs.OldValue, (double)valuePropertyChangedEventArgs.NewValue);
+                                LayoutUpdated();
+                            }
+                        }
+                        break;
+                    }
+                case nameof(Top):
+                    {
+                        if (e is ValuePropertyChangedEventArgs valuePropertyChangedEventArgs)
+                        {
+                            if (NodeLevel == NodeLevel.Level1)
+                            {
+                                LayoutUpdated();
+                            }
+                            else
+                            {
+                                UpdateOffsetY((double)valuePropertyChangedEventArgs.OldValue, (double)valuePropertyChangedEventArgs.NewValue);
+                                LayoutUpdated();
+                            }
+                        }
+                        break;
+                    }
+            }
+        }
+
+        public void UpdateOffsetX(double oldvalue, double newvalue)
+        {
+            if (GetLevel1Node()?.LayoutUpdating == true) return;
+
+            Offset += new VectorBase(newvalue - oldvalue, 0);
+        }
+
+        public void UpdateOffsetY(double oldvalue, double newvalue)
+        {
+            if (GetLevel1Node()?.LayoutUpdating == true) return;
+
+            Offset += new VectorBase(0, newvalue - oldvalue);
         }
 
         public void LayoutUpdated()
         {
-            var size = MeasureOverride();
-            ArrangeOverride(size);
+            GetLevel1Node()?.Level1LayoutUpdated();
         }
 
-        public void ArrangeOverride(SizeBase sizeBase)
+        protected void Level1LayoutUpdated()
         {
-            double left = MiddlePosition.X + ItemWidth / 2 + Spacing;
-            double top = MiddlePosition.Y - sizeBase.Height / 2;
+            LayoutUpdating = true;
+            var size = MeasureOverride();
+            ArrangeOverride();
+
+            Root.BringToFrontCommand.Execute(new SelectableDesignerItemViewModelBase[] { this });
+            Root?.ReconnectLinksToClosestPorts();
+
+            LayoutUpdating = false;
+        }
+
+        protected SizeBase MeasureOverride(bool isExpanded = true)
+        {
+            var sizewithSpacing = SizeWithSpacing;
+            if (Children?.Count > 0)
+            {
+                var childrensizes = Children.Select(p => p.MeasureOverride(IsExpanded && isExpanded)).ToArray();
+                sizewithSpacing = new SizeBase(sizewithSpacing.Width + childrensizes.Max(p => p.Width), Math.Max(sizewithSpacing.Height, childrensizes.Sum(p => p.Height)));
+            }
+            DesiredSize = isExpanded ? sizewithSpacing : new SizeBase(0, 0);
+            Visible = isExpanded;
+            var connectors = Root?.Items.OfType<ConnectionViewModel>().Where(p => p.SinkConnectorInfoFully?.DataItem == this).ToList();
+            connectors?.ForEach(p => p.Visible = Visible);
+            return DesiredSize;
+        }
+
+        protected void ArrangeOverride()
+        {
+            double left = MiddlePosition.X + ItemWidth / 2 + Spacing.Width;
+            double top = MiddlePosition.Y - DesiredSize.Height / 2;
             if (Children?.Count > 0)
             {
                 foreach (var child in Children)
                 {
-                    child.Left = left + Spacing;
-                    child.Top = top + child.DesiredSize.Height / 2 - child.ItemHeight;
+
+                    child.Left = left + child.Spacing.Width + child.Offset.X;
+                    child.Top = top + child.DesiredSize.Height / 2 - child.ItemHeight / 2 + child.Offset.Y;
+                    child.DesiredPosition = child.Position;
                     top += child.DesiredSize.Height;
 
-                    child.ArrangeOverride(child.DesiredSize);
+                    child.ArrangeOverride();
                 }
             }
         }
     }
-
-    public class MindLevel1Node : MindNode
-    {
-        public MindLevel1Node() : this(null)
-        {
-
-        }
-
-        public MindLevel1Node(IDiagramViewModel root) : base(root, NodeLevel.Level1)
-        {
-
-        }
-
-        public MindLevel1Node(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
-        {
-
-        }
-
-        public MindLevel1Node(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
-        {
-
-        }
-        protected override void Init(IDiagramViewModel root)
-        {
-            base.Init(root);
-
-            ItemWidth = 80;
-            ItemHeight = 40;
-            this.ClearConnectors();
-            var port = new FullyCreatedConnectorInfo(root, this, ConnectorOrientation.None, true) { XRatio = 0.5, YRatio = 0.5 };
-            this.AddConnector(port);
-            IsInnerConnector = true;
-        }
-
-        public RectangleBase Rectangle
-        {
-            get; set;
-        }
-   
-    }
-
-    public class MindLevel2Node : MindNode
-    {
-        public MindLevel2Node() : this(null)
-        {
-
-        }
-
-        public MindLevel2Node(IDiagramViewModel root) : base(root, NodeLevel.Level2)
-        {
-
-        }
-
-        public MindLevel2Node(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
-        {
-
-        }
-
-        public MindLevel2Node(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
-        {
-
-        }
-
-        protected override void Init(IDiagramViewModel root)
-        {
-            base.Init(root);
-
-            ItemWidth = 80;
-            ItemHeight = 40;
-            this.ClearConnectors();
-            var port1 = new FullyCreatedConnectorInfo(root, this, ConnectorOrientation.None, true) { XRatio = 0, YRatio = 0.5 };
-            this.AddConnector(port1);
-            var port2 = new FullyCreatedConnectorInfo(root, this, ConnectorOrientation.None, true) { XRatio = 1, YRatio = 0.5 };
-            this.AddConnector(port2);
-            IsInnerConnector = true;
-        }
-
-        public PointBase Offset
-        {
-            get; set;
-        }
-    }
-
-    public class MindLevel3Node : MindNode
-    {
-        public MindLevel3Node() : this(null)
-        {
-
-        }
-
-        public MindLevel3Node(IDiagramViewModel root) : base(root, NodeLevel.Level2)
-        {
-
-        }
-
-        public MindLevel3Node(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
-        {
-
-        }
-
-        public MindLevel3Node(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
-        {
-
-        }
-        protected override void Init(IDiagramViewModel root)
-        {
-            base.Init(root);
-
-            ItemWidth = 80;
-            ItemHeight = 40;
-            this.ClearConnectors();
-            var port1 = new FullyCreatedConnectorInfo(root, this, ConnectorOrientation.None, true) { XRatio = 0, YRatio = 1 };
-            this.AddConnector(port1);
-            var port2 = new FullyCreatedConnectorInfo(root, this, ConnectorOrientation.None, true) { XRatio = 1, YRatio = 1 };
-            this.AddConnector(port2);
-            IsInnerConnector = true;
-        }
-        public PointBase Offset
-        {
-            get; set;
-        }
-    }
 }