FPGACoder/HandyControl/HandyControl_Shared/Themes/Styles/Base/ElementGroupBaseStyle.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="ElementGroupBaseStyle" TargetType="hc:ElementGroup">
        <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 UniformHorizontalItemsPanelTemplate}"/>
        <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 UniformVerticalItemsPanelTemplate}"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Layout" Value="Stack"/>
                    <Condition Property="Orientation" Value="Horizontal"/>
                </MultiTrigger.Conditions>
                <Setter Property="ItemsPanel" Value="{StaticResource StackHorizontalItemsPanelTemplate}"/>
            </MultiTrigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="Layout" Value="Stack"/>
                    <Condition Property="Orientation" Value="Vertical"/>
                </MultiTrigger.Conditions>
                <Setter Property="ItemsPanel" Value="{StaticResource StackVerticalItemsPanelTemplate}"/>
            </MultiTrigger>
        </Style.Triggers>
    </Style>

</ResourceDictionary>