WPF小記 -- 使用Path本身畫圖標，點擊命中(焦點)丟失問題

在Template中，Path外面的Grid需添加Background屬性值。不然點擊範圍會受限制，例如：Click，在RadioButton的Height和With範圍內點擊，命中率<1。

<Style TargetType="{x:Type RadioButton}">
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="FocusVisualStyle" Value="{x:Null}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RadioButton}">
                    <!-- Grid加上Background屬性，點擊命中不會丟失 -->
                    <Grid x:Name="templateRoot" Margin="5" Background="Transparent" SnapsToDevicePixels="True">
                        <Path Name="path" Width="20" Height="20" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Data="M100.9,100.307 L181.5,100.307 181.5,180.60001 100.9,180.60001 z M0.5,100.307 L81.099999,100.307 81.099999,180.60001 0.5,180.60001 z M100.9,0.5 L181.5,0.5 181.5,80.793 100.9,80.793 z M0.50000539,0.5 L81.100006,0.5 81.100006,80.793 0.50000539,80.793 z" Fill="#AAAAAA" Stretch="Fill" />
                        <ContentPresenter x:Name="contentPresenter" Margin="{TemplateBinding Padding}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Focusable="False" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter TargetName="path" Property="Fill" Value="#5A84F3" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>