FPGACoder/HandyControl/HandyControl_Shared/Themes/Styles/Base/ToggleBlockBaseStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:hc="clr-namespace:HandyControl.Controls">

    <Style x:Key="ToggleBlockBaseStyle" TargetType="hc:ToggleBlock">
        <Setter Property="VerticalContentAlignment" Value="Center"/>
        <Setter Property="HorizontalContentAlignment" Value="Center"/>
        <Setter Property="Focusable" Value="False"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="hc:ToggleBlock">
                    <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
                        <hc:SimplePanel Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}">
                            <ContentPresenter Name="ContentPresenterChecked" ContentSource="CheckedContent" Visibility="Collapsed"/>
                            <ContentPresenter Name="ContentPresenterUnChecked" ContentSource="UnCheckedContent"/>
                            <ContentPresenter Name="ContentPresenterIndeterminate" ContentSource="IndeterminateContent" Visibility="Collapsed"/>
                        </hc:SimplePanel>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter TargetName="ContentPresenterChecked" Property="Visibility" Value="Visible"/>
                            <Setter TargetName="ContentPresenterUnChecked" Property="Visibility" Value="Collapsed"/>
                            <Setter TargetName="ContentPresenterIndeterminate" Property="Visibility" Value="Collapsed"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="False">
                            <Setter TargetName="ContentPresenterChecked" Property="Visibility" Value="Collapsed"/>
                            <Setter TargetName="ContentPresenterUnChecked" Property="Visibility" Value="Visible"/>
                            <Setter TargetName="ContentPresenterIndeterminate" Property="Visibility" Value="Collapsed"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="{x:Null}">
                            <Setter TargetName="ContentPresenterChecked" Property="Visibility" Value="Collapsed"/>
                            <Setter TargetName="ContentPresenterUnChecked" Property="Visibility" Value="Collapsed"/>
                            <Setter TargetName="ContentPresenterIndeterminate" Property="Visibility" Value="Visible"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</ResourceDictionary>