launcher/project/SPT.Launcher/CustomControls/TitleBar.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
			 xmlns:helpers="using:SPT.Launcher.Helpers"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="SPT.Launcher.CustomControls.TitleBar">

	<Grid ColumnDefinitions="AUTO,*,AUTO,10,AUTO,AUTO">

		<Rectangle Grid.ColumnSpan="6" IsHitTestVisible="False"
				   Fill="{Binding Background, RelativeSource={
                      RelativeSource AncestorType=UserControl}}"
                 />

		<Label Content="{Binding Title, RelativeSource={
			               RelativeSource AncestorType=UserControl}}"
			   IsHitTestVisible="False"
			   Foreground="{Binding Foreground, RelativeSource={
			                  RelativeSource AncestorType=UserControl}}"
			   Background="Transparent"
			   VerticalContentAlignment="Center"
			     />

		<!-- Setting button -->
		<Button Grid.Column="2"
				FontSize="12"
				Command="{Binding SettingsButtonCommand, RelativeSource={
			              RelativeSource AncestorType=UserControl}}"
				Classes="link"
				IsEnabled="{Binding Source={x:Static helpers:LauncherSettingsProvider.Instance}, Path=AllowSettings}"
				IsVisible="{Binding Source={x:Static helpers:LauncherSettingsProvider.Instance}, Path=AllowSettings}"
            >
			<StackPanel Orientation="Horizontal">
				<TextBlock HorizontalAlignment="Center" VerticalAlignment="Center">
					<Viewbox Width="14" Height="14" Margin="2">
						<Path Data="{StaticResource Gear}" 
						      Fill="{Binding $parent[TextBlock].Foreground}"
						/>
					</Viewbox>
				</TextBlock>
				<TextBlock Text="{Binding Source={x:Static helpers:LocalizationProvider.Instance}, Path=settings_menu}"/>
			</StackPanel>
		</Button>

		<!-- Minimize (-) Button -->
		<Button Grid.Column="4"
				Foreground="{Binding ButtonForeground, RelativeSource={
												 RelativeSource AncestorType=UserControl}}"
				Command="{Binding MinButtonCommand, RelativeSource={
			                RelativeSource AncestorType=UserControl}}"
				Background="Transparent"
				HorizontalContentAlignment="Center"
				VerticalContentAlignment="Center"
				VerticalAlignment="Stretch"
				CornerRadius="0"
				Width="35"
            >
			<Viewbox Width="15" Height="15">
				<TextBlock HorizontalAlignment="Center" VerticalAlignment="Center">
					<Path Data="{StaticResource Minimize}"
					      Fill="{Binding $parent[TextBlock].Foreground}"
					/>
				</TextBlock>
			</Viewbox>
			<Button.Styles>
				<Style Selector="Button:pointerover /template/ ContentPresenter">
					<Setter Property="Background" Value="{DynamicResource AccentBrush2}"/>
					<Setter Property="BorderThickness" Value="0"/>
				</Style>
				<Style Selector="Button:pressed /template/ ContentPresenter">
					<Setter Property="Background" Value="{DynamicResource AccentBrush3}"/>
				</Style>
			</Button.Styles>
		</Button>

		<!-- Close (X) Button -->
		<Button Grid.Column="5"
				Foreground="{Binding ButtonForeground, RelativeSource={
				             RelativeSource AncestorType=UserControl}}"
				Command="{Binding XButtonCommand, RelativeSource={
			                RelativeSource AncestorType=UserControl}}"
				Background="Transparent"
				HorizontalContentAlignment="Center"
				VerticalContentAlignment="Center"
				VerticalAlignment="Stretch"
				CornerRadius="0"
				Width="35"
            >
			<Viewbox Width="15" Height="15">
				<TextBlock>
					<Path Data="{StaticResource Close}"
					      Fill="{Binding $parent[TextBlock].Foreground}"
					/>
				</TextBlock>
			</Viewbox>
			<Button.Styles>
				<Style Selector="Button:pointerover /template/ ContentPresenter">
					<Setter Property="Background" Value="IndianRed"/>
					<Setter Property="BorderThickness" Value="0"/>
				</Style>
				<Style Selector="Button:pressed /template/ ContentPresenter">
					<Setter Property="Background" Value="Crimson"/>
				</Style>
			</Button.Styles>
		</Button>

	</Grid>

</UserControl>