LoadingScreen.xaml

<!--
    This Source Code Form is subject to the terms of the MIT License.
    If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
    Copyright (C) Leszek Pomianowski and WPF UI Contributors.
    All Rights Reserved.
-->

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

    <Style TargetType="{x:Type controls:LoadingScreen}">
        
        <Setter Property="Background" Value="{DynamicResource LoadingScreenBackground}" />

        <Setter Property="Foreground" Value="{DynamicResource AccentBrush}" />

        <Setter Property="SnapsToDevicePixels" Value="True" />

        <Setter Property="OverridesDefaultStyle" Value="True" />

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:LoadingScreen}">
                    <Grid
                        Width="{TemplateBinding Width}"
                        Height="{TemplateBinding Height}"
                        Background="{TemplateBinding Background}">

                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="*" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>

                        <Grid Grid.Column="0" VerticalAlignment="Center">
                            <controls:ProgressRing 
                                IsIndeterminate="True"
                                Foreground="{TemplateBinding Foreground}" />
                        </Grid>

                        <Grid Grid.Column="1" VerticalAlignment="Center">
                            <ContentPresenter />
                        </Grid>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>