wpf ToggleButton选中效果

先看效果

 

 <Style   TargetType="{x:Type ToggleButton}"> 
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderBrush" Value="DarkGray"/> 
        <Setter Property="BorderThickness" Value="1"/> 
        <Setter Property="Padding" Value="0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Grid>
                        <Border x:Name="brdOut1"  BorderBrush="{StaticResource MaterialDesignGroupBorder}" Width="20" Height="20" HorizontalAlignment="Left" VerticalAlignment="Top"/>
                        <Border x:Name="brdOut2" BorderBrush="{StaticResource MaterialDesignGroupBorder}" Width="20" Height="20" HorizontalAlignment="Right" VerticalAlignment="Top"/>
                        <Border x:Name="brdOut3" BorderBrush="{StaticResource MaterialDesignGroupBorder}" Width="20" Height="20" HorizontalAlignment="Left" VerticalAlignment="Bottom"/>
                        <Border x:Name="brdOut4" BorderBrush="{StaticResource MaterialDesignGroupBorder}" Width="20" Height="20" HorizontalAlignment="Right" VerticalAlignment="Bottom"/>
 
                        <Border Margin="2" x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" CornerRadius="0" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">

                          <ContentPresenter Grid.Row="1" x:Name="contentPresenter" ContentTemplate="{TemplateBinding ContentTemplate}" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/> 
                         </Border>
                    </Grid>
                    <ControlTemplate.Triggers>
                       
                        <Trigger Property="IsChecked" Value="True">
                            <Setter Property="BorderThickness" TargetName="brdOut1" Value="2,2,0,0"/>
                            <Setter Property="BorderThickness" TargetName="brdOut2" Value="0 2 2 0"/>
                            <Setter Property="BorderThickness" TargetName="brdOut3" Value="2 0 0 2"/>
                            <Setter Property="BorderThickness" TargetName="brdOut4" Value="0 0 2 2"/>

                        </Trigger>
                       
                        </DataTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>