添加项目文件。

VisionFrame/Nodes/StartNode.xaml

@@ -0,0 +1,29 @@
+<b:NodeBase x:Class="VisionFrame.Nodes.StartNode"
+             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:local="clr-namespace:VisionFrame.Nodes"
+             xmlns:b="clr-namespace:VisionFrame.Base;assembly=VisionFrame.Base"
+             mc:Ignorable="d" 
+             d:DesignHeight="32" d:DesignWidth="100">
+    <UserControl.Resources>
+        <BooleanToVisibilityConverter x:Key="b2v"/>
+    </UserControl.Resources>
+    <Grid Name="grid">
+        <Border CornerRadius="14" Background="#1f71e5" Margin="3">
+            <TextBlock Text="开始" VerticalAlignment="Center" HorizontalAlignment="Center"
+           FontSize="11" Foreground="White"/>
+        </Border>
+        <Grid Visibility="{Binding ElementName=grid,Path=IsMouseOver,Converter={StaticResource b2v}}">
+            <Ellipse Width="12" Height="12" Fill="#9FFF"
+                 VerticalAlignment="Bottom"
+                 Stroke="#CCC" StrokeThickness="1"
+                 Margin="0,0,0,-5"
+                 Visibility="{Binding ShowAnchorB,Converter={StaticResource b2v}}"
+                 MouseLeftButtonDown="Ellipse_MouseLeftButtonDown">
+
+            </Ellipse>
+        </Grid>
+    </Grid>
+</b:NodeBase>