可以自定义连接点

AIStudio.Wpf.DiagramDesigner.Demo/ViewModels/Customization/CustomPortViewModel.cs

@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+
+namespace AIStudio.Wpf.DiagramDesigner.Demo.ViewModels
+{
+    class CustomPortViewModel : BaseViewModel
+    {
+        public CustomPortViewModel()
+        {
+            Title = "Simple";
+            Info = "A simple example of AIStudio.Wpf.DiagramDesigner.";
+
+            DiagramViewModel = new DiagramViewModel();
+            DiagramViewModel.PageSizeType = PageSizeType.Custom;
+            DiagramViewModel.PageSize = new Size(double.NaN, double.NaN);
+            DiagramViewModel.ColorViewModel = new ColorViewModel();
+            DiagramViewModel.ColorViewModel.FillColor.Color = System.Windows.Media.Colors.Orange;
+
+            DefaultDesignerItemViewModel node1 = new DefaultDesignerItemViewModel(DiagramViewModel) { Left = 50, Top = 50, Text = "1" };
+            DiagramViewModel.DirectAddItemCommand.Execute(node1);
+
+            DefaultDesignerItemViewModel node2 = new DefaultDesignerItemViewModel(DiagramViewModel) { Left = 300, Top = 300, Text = "2" };
+            DiagramViewModel.DirectAddItemCommand.Execute(node2);
+
+            DefaultDesignerItemViewModel node3 = new DefaultDesignerItemViewModel(DiagramViewModel) { Left = 300, Top = 50, Text = "3" };
+            DiagramViewModel.DirectAddItemCommand.Execute(node3);
+
+            ConnectionViewModel connector1 = new ConnectionViewModel(DiagramViewModel, node1.RightConnector, node2.LeftConnector, DrawMode.ConnectingLineSmooth, RouterMode.RouterNormal);
+            DiagramViewModel.DirectAddItemCommand.Execute(connector1);
+
+            ConnectionViewModel connector2 = new ConnectionViewModel(DiagramViewModel, node2.RightConnector, node3.RightConnector, DrawMode.ConnectingLineStraight, RouterMode.RouterOrthogonal);
+            DiagramViewModel.DirectAddItemCommand.Execute(connector2);
+
+            DiagramViewModel.ClearSelectedItemsCommand.Execute(null);
+        }
+    }
+}

AIStudio.Wpf.DiagramDesigner.Demo/Views/Customization/CustomPortView.xaml

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+<UserControl x:Class="AIStudio.Wpf.DiagramDesigner.Demo.Views.CustomPortView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:dd="https://gitee.com/akwkevin/aistudio.-wpf.-diagram"
+             xmlns:controls="clr-namespace:AIStudio.Wpf.DiagramDesigner.Demo.Controls"
+             mc:Ignorable="d" 
+             d:DesignHeight="450" d:DesignWidth="800">
+    <Grid>
+        <!-- Diagram Control -->
+        <dd:DiagramControl x:Name="diagram" DataContext="{Binding DiagramViewModel}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" >
+            <dd:DiagramControl.ResourceDictionary>
+                <ResourceDictionary>
+                    <!--覆盖系统默认样式-->
+                    <DataTemplate DataType="{x:Type dd:FullyCreatedConnectorInfo}">
+                        <Grid Width="{Binding ConnectorWidth}" Height="{Binding ConnectorHeight}">
+                            <!-- transparent extra space makes connector easier to hit -->
+                            <Ellipse Fill="Transparent" Margin="-2" />
+                            <Ellipse Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"  StrokeThickness="1" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
+                        </Grid>
+                    </DataTemplate>
+                </ResourceDictionary>
+            </dd:DiagramControl.ResourceDictionary>
+        </dd:DiagramControl>
+
+        <controls:TitleControl/>
+    </Grid>
+</UserControl>

AIStudio.Wpf.DiagramDesigner.Demo/Views/Customization/CustomPortView.xaml.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace AIStudio.Wpf.DiagramDesigner.Demo.Views
+{
+    /// <summary>
+    /// CustomPortView.xaml 的交互逻辑
+    /// </summary>
+    public partial class CustomPortView : UserControl
+    {
+        public CustomPortView()
+        {
+            InitializeComponent();
+        }
+    }
+}

AIStudio.Wpf.DiagramDesigner/AIStudio.Wpf.DiagramDesigner_sezm4xxq_wpftmp.csproj

@@ -0,0 +1,267 @@
+<Project>
+  <PropertyGroup>
+    <AssemblyName>AIStudio.Wpf.DiagramDesigner</AssemblyName>
+    <IntermediateOutputPath>obj\Debug\</IntermediateOutputPath>
+    <BaseIntermediateOutputPath>obj\</BaseIntermediateOutputPath>
+    <MSBuildProjectExtensionsPath>F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\</MSBuildProjectExtensionsPath>
+    <_TargetAssemblyProjectName>AIStudio.Wpf.DiagramDesigner</_TargetAssemblyProjectName>
+  </PropertyGroup>
+  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk.WindowsDesktop" />
+  <PropertyGroup>
+    <UseWPF>true</UseWPF>
+    <Company>AIStudio.Wpf.Controls</Company>
+    <Authors>akwkevin</Authors>
+    <PackageProjectUrl>https://gitee.com/akwkevin</PackageProjectUrl>
+    <PackageIcon>A.png</PackageIcon>
+    <PackageIconUrl />
+    <NeutralLanguage />
+    <Version>1.0.4</Version>
+    <Description>一个Wpf的Diagram控件基础库</Description>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Remove="Images\file.png" />
+    <None Remove="Images\FormatPainter.cur" />
+    <None Include="A.png">
+      <Pack>True</Pack>
+      <PackagePath>
+      </PackagePath>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Xaml.Behaviors.Wpf" Version="1.1.31" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="SvgPathProperties" Version="1.1.2" />
+    <PackageReference Include="System.Reactive" Version="5.0.0" />
+    <PackageReference Include="WpfAnimatedGif" Version="2.0.0" />
+  </ItemGroup>
+  <ItemGroup Condition="$(DefineConstants.Contains(NETCOREAPP)) == true">
+    <PackageReference Include="System.Drawing.Common" Version="5.0.2" />
+  </ItemGroup>
+  <ItemGroup>
+  </ItemGroup>
+  <ItemGroup>
+    <None Update="Images\Gifs\car_chase.gif">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+  </ItemGroup>
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+    <ReferencePath Include="C:\Users\Administrator\.nuget\packages\wpfanimatedgif\2.0.0\lib\netcoreapp3.0\WpfAnimatedGif.dll" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\Controls\MultiSelectComboBox.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\Controls\PopupWindow.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\Controls\PropertiesView.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\UserControls\ConnectorContainer.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\UserControls\DiagramControl.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\UserControls\LineControl.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\UserControls\PointContainer.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\UserControls\TextControl.g.cs" />
+    <Compile Include="F:\aistudio.-wpf.-diagram\AIStudio.Wpf.DiagramDesigner\obj\Debug\netcoreapp3.1\GeneratedInternalTypeHelper.g.cs" />
+  </ItemGroup>
+  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk.WindowsDesktop" />
+</Project>

AIStudio.Wpf.DiagramDesigner/Controls/Connector.cs

@@ -9,10 +9,8 @@ using System.Windows.Media;
 
 namespace AIStudio.Wpf.DiagramDesigner
 {
-    public class Connector : Control
+    public class Connector : ContentControl
     {
-
-
         protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
         {
             base.OnMouseLeftButtonDown(e);
@@ -34,6 +32,17 @@ namespace AIStudio.Wpf.DiagramDesigner
             return element as DesignerCanvas;
         }
 
+        public FullyCreatedConnectorInfo Info
+        {
+            get
+            {
+                if (Content is FullyCreatedConnectorInfo connectorInfo)
+                    return connectorInfo;
+
+                return this.DataContext as FullyCreatedConnectorInfo;
+            }
+        }
+
     }
 
 

AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs

@@ -280,7 +280,8 @@ namespace AIStudio.Wpf.DiagramDesigner
                 {
                     sourceConnector = value;
                     connectorsHit.Add(sourceConnector);
-                    FullyCreatedConnectorInfo sourceDataItem = sourceConnector.DataContext as FullyCreatedConnectorInfo;
+
+                    FullyCreatedConnectorInfo sourceDataItem = sourceConnector.Info;
 
 
                     Rect rectangleBounds = sourceConnector.TransformToVisual(this).TransformBounds(new Rect(sourceConnector.RenderSize));
@@ -348,10 +349,9 @@ namespace AIStudio.Wpf.DiagramDesigner
                     // drag operation we cache the start point
                     rubberbandSelectionStartPoint = e.GetPosition(this);
 
-                    IDiagramViewModel vm = (this.DataContext as IDiagramViewModel);
                     if (!(Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)))
                     {
-                        vm.ClearSelectedItemsCommand.Execute(null);
+                        _viewModel.ClearSelectedItemsCommand.Execute(null);
 
                     }
                     e.Handled = true;
@@ -451,11 +451,11 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             if (sourceConnector != null)
             {
-                FullyCreatedConnectorInfo sourceDataItem = sourceConnectorInfo ?? (sourceConnector.DataContext as FullyCreatedConnectorInfo);
+                FullyCreatedConnectorInfo sourceDataItem = sourceConnectorInfo ?? (sourceConnector.Info);
                 if (connectorsHit.Count() == 2)
                 {
                     Connector sinkConnector = connectorsHit.Last();
-                    FullyCreatedConnectorInfo sinkDataItem = sinkConnector.DataContext as FullyCreatedConnectorInfo;
+                    FullyCreatedConnectorInfo sinkDataItem = sinkConnector.Info;
 
                     int indexOfLastTempConnection = sinkDataItem.DataItem.Root.Items.Count - 1;
                     sinkDataItem.DataItem.Root.DirectRemoveItemCommand.Execute(
@@ -562,7 +562,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             DragObject dragObject = e.Data.GetData(typeof(DragObject)) as DragObject;
             if (dragObject != null)
             {
-                (DataContext as IDiagramViewModel).ClearSelectedItemsCommand.Execute(null);
+                _viewModel.ClearSelectedItemsCommand.Execute(null);
                 Point position = e.GetPosition(this);
                 DesignerItemViewModelBase itemBase = null;
                 if (dragObject.DesignerItem != null)
@@ -589,7 +589,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 foreach (var file in files)
                 {
-                    (DataContext as IDiagramViewModel).ClearSelectedItemsCommand.Execute(null);
+                    _viewModel.ClearSelectedItemsCommand.Execute(null);
                     Point position = e.GetPosition(this);
                     ImageItemViewModel itemBase = new ImageItemViewModel();
                     itemBase.Icon = file;
@@ -599,7 +599,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
                     itemBase.Left = Math.Max(0, position.X - itemBase.ItemWidth / 2);
                     itemBase.Top = Math.Max(0, position.Y - itemBase.ItemHeight / 2);
-                    (DataContext as IDiagramViewModel).AddItemCommand.Execute(itemBase);
+                    _viewModel.AddItemCommand.Execute(itemBase);
                 }
             }
             e.Handled = true;

AIStudio.Wpf.DiagramDesigner/Converters/NullOrEmptyToBoolConverter.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class NullOrEmptyToBoolConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return string.IsNullOrEmpty(value?.ToString());
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+
+    public class NotNullOrEmptyToBoolConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return !string.IsNullOrEmpty(value?.ToString());
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}

AIStudio.Wpf.DiagramDesigner/Themes/ConnectorItem.xaml

@@ -3,56 +3,28 @@
                     xmlns:s="clr-namespace:AIStudio.Wpf.DiagramDesigner"
                     xmlns:c="clr-namespace:AIStudio.Wpf.DiagramDesigner.Controls">
 
-  
+    <DataTemplate DataType="{x:Type s:FullyCreatedConnectorInfo}">
-    <!-- Connector Style -->
+        <Grid Width="{Binding ConnectorWidth}" Height="{Binding ConnectorHeight}">
-    <Style TargetType="{x:Type s:Connector}">
+            <Grid.ContextMenu>
-        <Setter Property="Width"
+                <ContextMenu ItemsSource="{Binding MenuOptions}" >
-                Value="8" />
+                    <ContextMenu.ItemContainerStyle>
-        <Setter Property="Height"
+                        <Style TargetType="MenuItem">
-                Value="8" />
+                            <Setter Property="MenuItem.Header" Value="{Binding Text}" />
-        <Setter Property="Cursor"
+                            <Setter Property="MenuItem.ItemsSource" Value="{Binding Children}" />
-                Value="Cross" />
+                            <Setter Property="MenuItem.Command" Value="{Binding Command}" />
-        <Setter Property="SnapsToDevicePixels"
+                            <Setter Property="MenuItem.Icon" Value="{Binding Icon}" />
-                Value="true" />
+                            <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
-        <Setter Property="Template">
+                            <Setter Property="MenuItem.IsCheckable" Value="{Binding IsCheckable}" />
-            <Setter.Value>
+                            <Setter Property="MenuItem.IsChecked" Value="{Binding IsChecked}" />
-                <ControlTemplate TargetType="{x:Type s:Connector}">
+                        </Style>
-                    <Grid>
+                    </ContextMenu.ItemContainerStyle>
-                        <!-- transparent extra space makes connector easier to hit -->
+                </ContextMenu>
-                        <Rectangle Fill="Transparent"
+            </Grid.ContextMenu>
-                                   Margin="-2" />
+            <!-- transparent extra space makes connector easier to hit -->
-                        <Rectangle Fill="Lavender"
+            <Rectangle Fill="Transparent" Margin="-2" />
-                                   StrokeThickness="1"
+            <Rectangle Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"  StrokeThickness="1" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
-                                   Stroke="#AA000080" />
-                    </Grid>
-                </ControlTemplate>
-            </Setter.Value>
-        </Setter>
-    </Style>
-
-    <!-- ConnectorDecoratorTemplate Default Template -->
-    <ControlTemplate x:Key="ConnectorDecoratorTemplate"
-                     TargetType="{x:Type Control}">
-        <Grid Margin="-5">
-            <s:Connector x:Name="Left"
-                         Orientation="Left"
-                         VerticalAlignment="Center"
-                         HorizontalAlignment="Left" />
-            <s:Connector x:Name="Top"
-                         Orientation="Top"
-                         VerticalAlignment="Top"
-                         HorizontalAlignment="Center" />
-            <s:Connector x:Name="Right"
-                         Orientation="Right"
-                         VerticalAlignment="Center"
-                         HorizontalAlignment="Right" />
-            <s:Connector x:Name="Bottom"
-                         Orientation="Bottom"
-                         VerticalAlignment="Bottom"
-                         HorizontalAlignment="Center" />
         </Grid>
-    </ControlTemplate>
+    </DataTemplate>
-
 
     <!-- DragThumb Default Template -->
     <Style TargetType="{x:Type c:DragThumb}">

AIStudio.Wpf.DiagramDesigner/Themes/DesignerItem.xaml

@@ -13,8 +13,8 @@
     <s:ArrowPathConverter x:Key="ArrowPathConverter"/>
     <s:ArrowSizeConverter x:Key="ArrowSizeConverter"/>
     <s:LineDashConverter x:Key="LineDashConverter"/>
-    <s:ClipConverter x:Key="ClipConverter"/>
+    <s:ClipConverter x:Key="ClipConverter"/>  
-
+    
     <DataTemplate DataType="{x:Type s:DefaultDesignerItemViewModel}">
         <Grid IsHitTestVisible="False">
             <Rectangle StrokeThickness="1" Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />

AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml

@@ -24,6 +24,7 @@
             <s:ClipConverter x:Key="ClipConverter"/>
             <s:InvertBoolConverter x:Key="InvertBoolConverter"/>
             <s:ConectorStyleConverter x:Key="ConectorStyleConverter"/>
+            <s:NotNullOrEmptyToBoolConverter x:Key="NotNullOrEmptyToBoolConverter"/>
             
             <!-- ResizeDecorator Default Template -->
             <!--
@@ -178,7 +179,7 @@
                                         </ContextMenu.ItemContainerStyle>
                                     </ContextMenu>
                                 </Grid.ContextMenu>
-                                <!-- transparent extra space makes connector easier to hit -->
+                                transparent extra space makes connector easier to hit
                                 <Rectangle Fill="Transparent" Margin="-2" />
                                 <Rectangle Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}"  StrokeThickness="1" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
                             </Grid>
@@ -311,46 +312,70 @@
             <ControlTemplate x:Key="ConnectorDecoratorTemplate"
                      TargetType="{x:Type Control}">
                 <Grid Margin="-5">
-                    <s:Connector DataContext="{Binding LeftConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                    <s:Connector 
-                                                                Orientation="Left"
+                        Content="{Binding LeftConnector}" 
-                                                                VerticalAlignment="Center"
+                        Cursor="Cross"
-                                                                HorizontalAlignment="Left"
+                        SnapsToDevicePixels="True"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        Orientation="Left"
-                    <s:Connector DataContext="{Binding TopLeftConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        VerticalAlignment="Center"
-                                                                Orientation="TopLeft"
+                        HorizontalAlignment="Left"
-                                                                VerticalAlignment="Top"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
-                                                                HorizontalAlignment="Left"
+                    <s:Connector 
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        Content="{Binding TopLeftConnector}" 
-                    <s:Connector DataContext="{Binding TopConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        Cursor="Cross"
-                                                                Orientation="Top"
+                        SnapsToDevicePixels="True"
-                                                                VerticalAlignment="Top"
+                        Orientation="TopLeft"
-                                                                HorizontalAlignment="Center"
+                        VerticalAlignment="Top"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        HorizontalAlignment="Left"
-                    <s:Connector DataContext="{Binding TopRightConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
-                                                                Orientation="TopRight"
+                    <s:Connector 
-                                                                VerticalAlignment="Top"
+                        Content="{Binding TopConnector}"
-                                                                HorizontalAlignment="Right"
+                        Cursor="Cross"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        SnapsToDevicePixels="True"
-                    <s:Connector DataContext="{Binding RightConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        Orientation="Top"
-                                                                Orientation="Right"
+                        VerticalAlignment="Top"
-                                                                VerticalAlignment="Center"
+                        HorizontalAlignment="Center"
-                                                                HorizontalAlignment="Right"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                    <s:Connector 
-                    <s:Connector DataContext="{Binding BottomRightConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        Content="{Binding TopRightConnector}"
-                                                                Orientation="BottomRight"
+                        Cursor="Cross"
-                                                                VerticalAlignment="Bottom"
+                        SnapsToDevicePixels="True"
-                                                                HorizontalAlignment="Right"
+                        Orientation="TopRight"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        VerticalAlignment="Top"
-                    <s:Connector DataContext="{Binding BottomConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        HorizontalAlignment="Right"
-                                                                Orientation="Bottom"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
-                                                                VerticalAlignment="Bottom"
+                    <s:Connector 
-                                                                HorizontalAlignment="Center"
+                        Content="{Binding RightConnector}"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        Cursor="Cross"
-                    <s:Connector DataContext="{Binding BottomLeftConnector}" Style="{Binding Style, Converter={StaticResource ConectorStyleConverter},ConverterParameter={StaticResource DefaultConnectorStyle}}"
+                        SnapsToDevicePixels="True"
-                                                                Orientation="BottomLeft"
+                        Orientation="Right"
-                                                                VerticalAlignment="Bottom"
+                        VerticalAlignment="Center"
-                                                                HorizontalAlignment="Left"
+                        HorizontalAlignment="Right"
-                                                                Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                    <s:Connector 
+                        Content="{Binding BottomRightConnector}"
+                        Cursor="Cross"
+                        SnapsToDevicePixels="True"
+                        Orientation="BottomRight"
+                        VerticalAlignment="Bottom"
+                        HorizontalAlignment="Right"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                    <s:Connector 
+                        Content="{Binding BottomConnector}"
+                        Cursor="Cross"
+                        SnapsToDevicePixels="True"
+                        Orientation="Bottom"
+                        VerticalAlignment="Bottom"
+                        HorizontalAlignment="Center"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
+                    <s:Connector 
+                        Content="{Binding BottomLeftConnector}"
+                        Cursor="Cross"
+                        SnapsToDevicePixels="True"
+                        Orientation="BottomLeft"
+                        VerticalAlignment="Bottom"
+                        HorizontalAlignment="Left"
+                        Visibility="{Binding Path=ShowConnectors, Converter={x:Static s:BoolToVisibilityConverter.Instance}}" />
                 </Grid>
             </ControlTemplate>
 
@@ -363,7 +388,7 @@
                                 <s:Connector  Style="{StaticResource DefaultConnectorStyle}"/>
                             </Grid>
                         </DataTemplate>
-                    </s:ConnectorContainer.ItemTemplate>            
+                    </s:ConnectorContainer.ItemTemplate>
                 </s:ConnectorContainer>
             </ControlTemplate>
 
@@ -378,7 +403,7 @@
             <ItemsControl ItemsSource="{Binding Items}"
                                 ItemContainerStyleSelector="{x:Static s:DesignerItemsControlItemStyleSelector.Instance}">
                 <ItemsControl.Resources>
-                    
+
                     <!--基础类型-->
                     <Style x:Key="designerItemStyle"
                                 TargetType="{x:Type ContentPresenter}">
@@ -459,7 +484,15 @@
                                                                     </Setter.Value>
                                                                 </Setter>
                                                             </DataTrigger>
-
+                                                            <DataTrigger Binding="{Binding Text,Converter={StaticResource NotNullOrEmptyToBoolConverter}}" Value="True">
+                                                                <Setter Property="Template">
+                                                                    <Setter.Value>
+                                                                        <ControlTemplate>
+                                                                            <s:TextControl x:Name="PART_Text" />
+                                                                        </ControlTemplate>
+                                                                    </Setter.Value>
+                                                                </Setter>
+                                                            </DataTrigger>
                                                         </Style.Triggers>
                                                     </Style>
                                                 </Control.Style>
@@ -538,7 +571,7 @@
                                         <Grid.InputBindings>
                                             <MouseBinding MouseAction="LeftDoubleClick" Command="{Binding EditCommand}" CommandParameter="{Binding }" />
                                         </Grid.InputBindings>
-                                        
+
                                         <Grid.ContextMenu>
                                             <ContextMenu>
                                                 <MenuItem Header="删除" Command="{Binding DeleteConnectionCommand}" CommandParameter="{Binding}"/>
@@ -547,14 +580,14 @@
                                             </ContextMenu>
                                         </Grid.ContextMenu>
 
-                                        <s:LineControl x:Name="line"/>                                        
+                                        <s:LineControl x:Name="line"/>
 
                                         <!-- PART_DragThumb -->
                                         <c:DragThumb x:Name="PART_DragThumb" Margin="8"
                                                             Cursor="SizeAll" >
                                             <c:DragThumb.InputBindings>
                                                 <MouseBinding MouseAction="LeftDoubleClick" Command="{Binding EditCommand}" CommandParameter="{Binding }" />
-                                            </c:DragThumb.InputBindings>                                 
+                                            </c:DragThumb.InputBindings>
                                         </c:DragThumb>
 
                                         <s:PointContainer x:Name="PART_VerticesContainer" Style="{StaticResource innerConnectorContainer}" ItemsSource="{Binding Vertices}" Visibility="Collapsed">
@@ -583,13 +616,20 @@
                                             <s:PointContainer.ItemTemplate>
                                                 <DataTemplate>
                                                     <Grid s:SelectionProps.EnabledForSelection="True" Background="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}">
+
                                                         <Grid.ContextMenu>
                                                             <ContextMenu>
                                                                 <MenuItem Header="删除" Command="{Binding DeleteLabelCommand}" CommandParameter="{Binding}"/>
                                                             </ContextMenu>
                                                         </Grid.ContextMenu>
-                                                        <c:PointDragThumb Cursor="SizeAll" Opacity="0"/>
+                                                        <c:PointDragThumb Cursor="SizeAll" Opacity="0">
+                                                            <c:PointDragThumb.InputBindings>
+                                                                <MouseBinding MouseAction="LeftDoubleClick" Command="{Binding EditCommand}" CommandParameter="{Binding }" />
+                                                            </c:PointDragThumb.InputBindings>
+                                                        </c:PointDragThumb>
                                                         <s:TextControl Margin="5" />
+
+
                                                     </Grid>
                                                 </DataTemplate>
                                             </s:PointContainer.ItemTemplate>
@@ -828,7 +868,7 @@
                             </Setter.Value>
                         </Setter>
                     </Style>
-               
+
                     <Style x:Key="linkpointItemStyle"
                                 TargetType="{x:Type ContentPresenter}">
                         <Setter Property="Canvas.Top"

AIStudio.Wpf.DiagramDesigner/UserControls/TextControl.xaml.cs

@@ -69,7 +69,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                 }
             }
-            else if (e.PropertyName == "EditText")
+            else if (e.PropertyName == "ShowText")
             {
                 PART_ShowText.Visibility = Visibility.Visible;
                 PART_TextBlock.Visibility = Visibility.Collapsed;

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

@@ -43,6 +43,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             ConnectorHeight = 30;
 
             DeleteLabelCommand = new SimpleCommand(Command_Enable, DeleteLabel);
+            EditCommand = new SimpleCommand(Command_Enable, ExecuteEditCommand);
         }
 
         protected override void LoadDesignerItemViewModel(SelectableItemBase designerbase)
@@ -81,7 +82,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             get; set;
         }
 
-        //private bool _isSelected;
+        private bool _isSelected;
         public override bool IsSelected
         {
             get
@@ -106,6 +107,11 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get; set;
         }
+
+        public SimpleCommand EditCommand
+        {
+            get; private set;
+        }
         #endregion
 
         private bool updating = false;
@@ -198,5 +204,11 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        protected virtual void ExecuteEditCommand(object param)
+        {
+            if (IsReadOnly == true) return;
+
+            RaisePropertyChanged("ShowText");
+        }
     }
 }

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

@@ -297,7 +297,8 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public virtual bool CanAttachTo(FullyCreatedConnectorInfo port) => port != this && !port.IsReadOnly && DataItem != port.DataItem;
+        public virtual bool CanAttachTo(FullyCreatedConnectorInfo port)
+            => port != this && !port.IsReadOnly && DataItem != port.DataItem;
     }
 
 

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

@@ -118,13 +118,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             set
             {
-                if (SetProperty(ref _text, value))
+                SetProperty(ref _text, value);
-                {
-                    if (!string.IsNullOrEmpty(_text))
-                    {
-                        ShowText = true;
-                    }
-                }
             }
         }
 
@@ -152,7 +146,10 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
             set
             {
-                SetProperty(ref _showText, value);
+                if (!SetProperty(ref _showText, value))
+                {
+                    RaisePropertyChanged(nameof(ShowText));
+                }
             }
         }
 
@@ -191,8 +188,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             if (IsReadOnly == true) return;
 
             ShowText = true;
-
-            RaisePropertyChanged("EditText");
         }
     }
 }

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

@@ -144,7 +144,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             get; set;
         }
 
-        protected bool _isSelected;
+        private bool _isSelected;
         [Browsable(false)]
         public virtual bool IsSelected
         {