add ButtonDashed style

src/Shared/HandyControl_Shared/Themes/Styles/Base/ButtonBaseStyle.xaml

@@ -47,6 +47,32 @@
         </Style.Triggers>
     </Style>
 
+    <Style x:Key="ButtonDashedBaseStyle" BasedOn="{StaticResource ButtonBaseStyle}" TargetType="Button">
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="Button">
+                    <hc:DashedBorder BorderDashArray="3,2" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Background="Transparent" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}">
+                        <StackPanel Orientation="Horizontal" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Margin="{TemplateBinding Padding}">
+                            <Path x:Name="PathMain" Width="{TemplateBinding hc:IconElement.Width}" Height="{TemplateBinding hc:IconElement.Height}" Fill="{TemplateBinding Foreground}" SnapsToDevicePixels="True" Stretch="Uniform" Data="{TemplateBinding hc:IconElement.Geometry}"/>
+                            <ContentPresenter x:Name="ContentPresenterMain" RecognizesAccessKey="True" VerticalAlignment="Center" Margin="6,0,0,0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                        </StackPanel>
+                    </hc:DashedBorder>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="Content" Value="{x:Null}">
+                            <Setter Property="Visibility" Value="Collapsed" TargetName="ContentPresenterMain"/>
+                        </Trigger>
+                        <Trigger Property="hc:IconElement.Geometry" Value="{x:Null}">
+                            <Setter Property="Visibility" Value="Collapsed" TargetName="PathMain"/>
+                            <Setter Property="Margin" Value="0" TargetName="ContentPresenterMain"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
     <Style x:Key="ButtonGroupItemBaseStyle" BasedOn="{StaticResource BaseStyle}" TargetType="Button">
         <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
         <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>