QuickLook/QuickLook/Plugin/InfoPanel/InfoPanel.xaml

<UserControl x:Class="QuickLook.Plugin.InfoPanel.InfoPanel"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:local="clr-namespace:QuickLook.Plugin.InfoPanel"
             FontSize="14"
             mc:Ignorable="d" Width="453" Height="172" UseLayoutRounding="True" TextOptions.TextHintingMode="Animated">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="28" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="150" />
            <ColumnDefinition Width="65*" />
        </Grid.ColumnDefinitions>
        <Image x:Name="image" Grid.Row="1" Grid.Column="0" Height="128" Width="128" Stretch="Fill" Opacity="0"
               Margin="0,-20,0,0">
            <Image.Style>
                <Style TargetType="{x:Type Image}">
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding Source, ElementName=image}" Value="{x:Null}">
                            <DataTrigger.ExitActions>
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" To="1"
                                                         BeginTime="0:0:0" Duration="0:0:0.05" />
                                    </Storyboard>
                                </BeginStoryboard>
                            </DataTrigger.ExitActions>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Image.Style>
        </Image>
        <Grid Grid.Column="1" Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="5" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="10" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="10" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="10" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <TextBlock x:Name="filename" Grid.Row="1" Grid.Column="1" FontSize="19" Padding="3"
                       TextWrapping="Wrap"
                       LineHeight="25" MaxHeight="60" TextTrimming="CharacterEllipsis" FontWeight="Normal">
                FilenameFilenameFilenameFilenameFilenameFilenameFilenameFilenameFilenameFilename.ext
            </TextBlock>
            <TextBlock x:Name="modDate" Grid.Row="3" Grid.Column="1" Padding="3" FontWeight="Light"
                       Foreground="{DynamicResource WindowTextForegroundAlternative}">
                Last modified at 01/01/2017 00:00:00
            </TextBlock>
            <TextBlock x:Name="totalSize" Grid.Row="4" Grid.Column="1" Padding="3" FontWeight="Light"
                       Foreground="{DynamicResource WindowTextForegroundAlternative}">
                Calculating size...
            </TextBlock>
        </Grid>
    </Grid>
</UserControl>