QuickLook/QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml

<UserControl x:Class="QuickLook.Plugin.ImageViewer.ImagePanel"
             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.ImageViewer"
             xmlns:animatedImage="clr-namespace:QuickLook.Plugin.ImageViewer.AnimatedImage"
             xmlns:plugin="clr-namespace:QuickLook.Common.Plugin;assembly=QuickLook.Common"
             mc:Ignorable="d"
             x:Name="imagePanel"
             d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <!-- only for design -->
                <ResourceDictionary Source="/QuickLook.Common;component/Styles/MainWindowStyles.xaml" />
                <ResourceDictionary Source="/QuickLook.Common;component/Styles/MainWindowStyles.Dark.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </UserControl.Resources>
    <Grid>
        <Rectangle Visibility="{Binding BackgroundVisibility, ElementName=imagePanel}"
                   RenderOptions.BitmapScalingMode="NearestNeighbor">
            <Rectangle.Style>
                <Style>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}"
                                     Value="{x:Static plugin:Themes.Dark}">
                            <Setter Property="Rectangle.Fill">
                                <Setter.Value>
                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32"
                                                RenderOptions.BitmapScalingMode="NearestNeighbor"
                                                ImageSource="Resources/background-b.png"
                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile" />
                                </Setter.Value>
                            </Setter>
                        </DataTrigger>
                        <DataTrigger Binding="{Binding ElementName=imagePanel,Path=Theme}"
                                     Value="{x:Static plugin:Themes.Light}">
                            <Setter Property="Rectangle.Fill">
                                <Setter.Value>
                                    <ImageBrush AlignmentY="Top" Viewport="0,0,32,32"
                                                RenderOptions.BitmapScalingMode="NearestNeighbor"
                                                ImageSource="Resources/background.png"
                                                ViewportUnits="Absolute" Stretch="UniformToFill" TileMode="Tile" />
                                </Setter.Value>
                            </Setter>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Rectangle.Style>
        </Rectangle>
        <ScrollViewer x:Name="viewPanel" BorderThickness="0" HorizontalScrollBarVisibility="Auto"
                      VerticalScrollBarVisibility="Auto" Focusable="False" IsManipulationEnabled="True">
            <animatedImage:AnimatedImage x:Name="viewPanelImage" Stretch="None"
                                         Meta="{Binding Meta, ElementName=imagePanel}"
                                         ContextObject="{Binding ContextObject, ElementName=imagePanel}"
                                         RenderOptions.BitmapScalingMode="{Binding RenderMode, ElementName=imagePanel}"
                                         AnimationUri="{Binding ImageUriSource, ElementName=imagePanel}" />
        </ScrollViewer>
        <Border x:Name="zoomLevelInfo" CornerRadius="5" IsHitTestVisible="False" Opacity="0" Background="Gray"
                Padding="15,4,15,4" HorizontalAlignment="Center" VerticalAlignment="Center">
            <TextBlock Foreground="White" FontSize="18"
                       Text="{Binding ElementName=imagePanel, Path=ZoomFactor, StringFormat={}{0:P0}}" />
            <Border.Resources>
                <Storyboard x:Key="StoryboardShowZoomLevelInfo">
                    <DoubleAnimationUsingKeyFrames Storyboard.Target="{Binding Source={x:Reference zoomLevelInfo}}"
                                                   Storyboard.TargetProperty="Opacity">
                        <DoubleAnimationUsingKeyFrames.KeyFrames>
                            <LinearDoubleKeyFrame Value="0.9" KeyTime="0:0:0.1" />
                            <LinearDoubleKeyFrame Value="0.9" KeyTime="0:0:0.6" />
                            <LinearDoubleKeyFrame Value="0" KeyTime="0:0:0.8" />
                        </DoubleAnimationUsingKeyFrames.KeyFrames>
                    </DoubleAnimationUsingKeyFrames>
                </Storyboard>
            </Border.Resources>
        </Border>

        <Button x:Name="buttonMeta" Width="24" Height="24" Style="{StaticResource CaptionButtonStyle}"
                HorizontalAlignment="Right" VerticalAlignment="Top"
                Visibility="{Binding ElementName=imagePanel, Path=MetaIconVisibility}"
                Margin="0,8,40,0" Content="&#xE946;" />

        <Button x:Name="buttonBackgroundColour" Style="{StaticResource CaptionButtonStyle}" Width="24" Height="24"
                HorizontalAlignment="Right" VerticalAlignment="Top"
                Visibility="{Binding ElementName=imagePanel, Path=BackgroundVisibility}"
                Margin="0,8,8,0" Content="&#xEF1F;" />

        <TextBlock x:Name="textMeta" IsHitTestVisible="False" HorizontalAlignment="Right"
                   VerticalAlignment="Top" FontSize="11"
                   Padding="5,5,5,5" Margin="0,40,8,0" Background="{DynamicResource CaptionBackground}"
                   Foreground="{DynamicResource WindowTextForeground}">
            <TextBlock.Inlines>
                <Run FontWeight="SemiBold">Camera maker</Run>
                <Run>:&#160;</Run>
                <Run>SONY</Run>
            </TextBlock.Inlines>
            <TextBlock.Style>
                <Style>
                    <Style.Setters>
                        <Setter Property="TextBlock.Visibility" Value="Collapsed" />
                    </Style.Setters>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ElementName=buttonMeta,Path=IsMouseOver}" Value="True">
                            <Setter Property="TextBlock.Visibility" Value="Visible" />
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </TextBlock.Style>
        </TextBlock>
    </Grid>
</UserControl>