modified some styles

src/Shared/HandyControl_Shared/Themes/Styles/Rectangle.xaml

@@ -0,0 +1,26 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:controls="clr-namespace:HandyControl.Controls">
+
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="../Basic/Converters.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="RectangleCircular" TargetType="Rectangle">
+        <Setter Property="controls:RectangleAttach.Circular" Value="True"/>
+    </Style>
+
+    <Style x:Key="RectangleFocusVisual" TargetType="Rectangle">
+        <Setter Property="Margin" Value="-2"/>
+        <Setter Property="Opacity" Value=".6"/>
+        <Setter Property="SnapsToDevicePixels" Value="True"/>
+        <Setter Property="Stroke" Value="{DynamicResource SecondaryBorderBrush}"/>
+        <Setter Property="StrokeThickness" Value="2"/>
+        <Setter Property="StrokeDashArray" Value="1 1"/>
+    </Style>
+
+    <Style x:Key="RectangleFocusVisualCircular" BasedOn="{StaticResource RectangleFocusVisual}" TargetType="Rectangle">
+        <Setter Property="controls:RectangleAttach.Circular" Value="True"/>
+    </Style>
+
+</ResourceDictionary>