fixed #557

src/Shared/HandyControlDemo_Shared/Resources/Themes/Styles/Style.xaml

@@ -188,7 +188,7 @@
         </Setter>
     </Style>
 
-    <Style x:Key="Path4GeometryItem" BasedOn="{StaticResource {x:Type Path}}" TargetType="Path">
+    <Style x:Key="Path4GeometryItem" TargetType="Path">
         <Setter Property="Margin" Value="10"/>
         <Setter Property="Data" Value="{Binding Info.Data,RelativeSource={RelativeSource AncestorType=Border}}"/>
         <Setter Property="Fill" Value="{DynamicResource PrimaryBrush}"/>
@@ -196,6 +196,7 @@
         <Setter Property="Height" Value="20"/>
         <Setter Property="HorizontalAlignment" Value="Center"/>
         <Setter Property="VerticalAlignment" Value="Center"/>
+        <Setter Property="Stretch" Value="Uniform"/>
         <Style.Triggers>
             <DataTrigger Binding="{Binding Info.Line,RelativeSource={RelativeSource AncestorType=Border}}" Value="True">
                 <Setter Property="Fill" Value="{x:Null}"/>