OnlineMonitorSystem/HandyControl/HandyControl_Shared/Themes/Styles/Base/ButtonGroupBaseStyle.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"
                    xmlns:tools="clr-namespace:HandyControl.Tools">

    <ItemsPanelTemplate x:Key="ButtonGroupHorizontalUniformItemsPanelTemplate">
        <UniformGrid FocusVisualStyle="{x:Null}" Rows="1"/>
    </ItemsPanelTemplate>

    <ItemsPanelTemplate x:Key="ButtonGroupVerticalUniformItemsPanelTemplate">
        <UniformGrid FocusVisualStyle="{x:Null}" Columns="1"/>
    </ItemsPanelTemplate>

    <ItemsPanelTemplate x:Key="ButtonGroupHorizontalStackItemsPanelTemplate">
        <StackPanel FocusVisualStyle="{x:Null}" Orientation="Horizontal"/>
    </ItemsPanelTemplate>

    <ItemsPanelTemplate x:Key="ButtonGroupVerticalStackItemsPanelTemplate">
        <StackPanel FocusVisualStyle="{x:Null}"/>
    </ItemsPanelTemplate>

    <tools:ButtonGroupItemStyleSelector x:Key="ButtonGroupItemStyleSelector"/>

    <Style x:Key="ButtonGroupBaseStyle" TargetType="hc:ButtonGroup">
        <Setter Property="ItemContainerStyleSelector" Value="{StaticResource ButtonGroupItemStyleSelector}"/>
        <Setter Property="VerticalAlignment" Value="Top"/>
        <Setter Property="Layout" Value="Uniform"/>
        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
        <Setter Property="Focusable" Value="False"/>
        <Setter Property="ItemsPanel" Value="{StaticResource ButtonGroupHorizontalUniformItemsPanelTemplate}"/>
        <Setter Property="hc:VisualElement.HighlightBorderBrush" Value="{DynamicResource PrimaryBrush}"/>
        <Setter Property="hc:VisualElement.HighlightBackground" Value="{DynamicResource RegionBrush}"/>
        <Setter Property="hc:VisualElement.HighlightForeground" Value="{DynamicResource PrimaryBrush}"/>
        <Style.Triggers>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Layout" Value="Uniform"/>
                    <Condition Property="Orientation" Value="Vertical"/>
                </MultiTrigger.Conditions>
                <Setter Property="ItemsPanel" Value="{StaticResource ButtonGroupVerticalUniformItemsPanelTemplate}"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Layout" Value="Stack"/>
                    <Condition Property="Orientation" Value="Horizontal"/>
                </MultiTrigger.Conditions>
                <Setter Property="ItemsPanel" Value="{StaticResource ButtonGroupHorizontalStackItemsPanelTemplate}"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Layout" Value="Stack"/>
                    <Condition Property="Orientation" Value="Vertical"/>
                </MultiTrigger.Conditions>
                <Setter Property="ItemsPanel" Value="{StaticResource ButtonGroupVerticalStackItemsPanelTemplate}"/>
            </MultiTrigger>
        </Style.Triggers>
    </Style>

</ResourceDictionary>