prs/prs.desktop/Panels/Staging/StagingPanel.xaml

<UserControl x:Class="PRSDesktop.StagingPanel"
             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:dynamicgrid="clr-namespace:InABox.DynamicGrid;assembly=InABox.Wpf"
             xmlns:local="clr-namespace:PRSDesktop"
             xmlns:wpf="clr-namespace:InABox.Wpf;assembly=InABox.Wpf"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">

    <dynamicgrid:DynamicSplitPanel x:Name="MainPanel" View="Combined" AllowableViews="Combined,Detail" MasterCaption="Staged Documents" AnchorWidth="500" Anchor="Master">

        <dynamicgrid:DynamicSplitPanel.Header>
            <Border BorderBrush="Gray" BorderThickness="0.75" Background="WhiteSmoke">
                <Label Content="Staged Documents"  FontWeight="DemiBold" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" />
            </Border>
        </dynamicgrid:DynamicSplitPanel.Header>
        
        <dynamicgrid:DynamicSplitPanel.Master>
            <Grid x:Name="masterGrid">
                <Grid.RowDefinitions>
                    <RowDefinition Height="2*"/>
                    <RowDefinition Height="0"/>
                </Grid.RowDefinitions>
                <local:StagingSetoutGrid Grid.Row="0" x:Name="stagingSetoutGrid" OnCustomiseSetouts="stagingSetoutGrid_OnCustomiseSetouts"/>
                <local:StagingMaterialListGrid Grid.Row="1" x:Name="stagingMaterialListGrid"/>
            </Grid>
        </dynamicgrid:DynamicSplitPanel.Master>
        
        <dynamicgrid:DynamicSplitPanel.Detail>
        
            <dynamicgrid:DynamicSplitPanel x:Name="NestedPanel" View="Master" AllowableViews="Master,Combined" AnchorWidth="500" Anchor="Detail" MasterCaption="Document Viewer" DetailCaption="Manufacturing Packets"
                                           OnChanged="NestedPanel_OnChanged">
                
                <dynamicgrid:DynamicSplitPanel.Header>
                    <Border BorderBrush="Gray" BorderThickness="0.75" Background="WhiteSmoke">
                        <Label Content="Document Viewer" HorizontalAlignment="Center" FontWeight="DemiBold" VerticalContentAlignment="Center"/>
                    </Border>
                </dynamicgrid:DynamicSplitPanel.Header>
                
                <dynamicgrid:DynamicSplitPanel.Master>
                    <Border BorderBrush="Gray" BorderThickness="0.75">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <ScrollViewer VerticalScrollBarVisibility="Auto" Grid.Row="0">
                                <StackPanel x:Name="DocumentViewer" Orientation="Vertical" Margin="10"/>
                            </ScrollViewer>
                            <Border Grid.Row="1" BorderBrush="Gray" BorderThickness="0.5">
                                <DockPanel LastChildFill="False">
                                    <Button DockPanel.Dock="Left"
                                            Content="Mark Up"
                                            Padding="20, 5, 20, 5" Margin="5"
                                            Height="35"
                                            x:Name="MarkUpButton"
                                            Click="MarkUpButton_Click"
                                            IsEnabled="False"/>
                                    <Button DockPanel.Dock="Right"
                                            Content="Reject"
                                            Height="35"
                                            Padding="20, 5, 20, 5" Margin="5, 5, 15, 5"
                                            x:Name="RejectButton"
                                            Click="RejectButton_Click"
                                            IsEnabled="False"/>
                                </DockPanel>
                            </Border>
                        </Grid>
                    </Border>
                </dynamicgrid:DynamicSplitPanel.Master>
                
                <dynamicgrid:DynamicSplitPanel.DetailHeader>
                    <DockPanel LastChildFill="True">
                        <Button x:Name="CollapsePacketsButton" Click="CollapsePacketsButton_Click"
                                    Content="Collapse"
                                    IsEnabled="False"
                                    DockPanel.Dock="Left"
                                    Margin="0,0,2,0" Padding="5" Width="75"/>
                        <Button x:Name="AddPacketButton" Click="AddPacketButton_Click"
                                    IsEnabled="False"
                                    DockPanel.Dock="Right"
                                    Margin="2,0,0,0" Width="30" Height="30">
                            <Image Source="pack://application:,,,/Resources/add.png"/>
                        </Button>
                        <Border BorderBrush="Gray" BorderThickness="0.75" Background="WhiteSmoke"
                                DockPanel.Dock="Left">
                            <Label Content="Manufacturing Packets" HorizontalAlignment="Center" FontWeight="DemiBold" VerticalContentAlignment="Center"/>
                        </Border>
                    </DockPanel>
                </dynamicgrid:DynamicSplitPanel.DetailHeader>
                
                <dynamicgrid:DynamicSplitPanel.Detail>
                    <Border BorderBrush="Gray" BorderThickness="0.75">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <local:StagingManufacturingPacketList x:Name="ManufacturingPacketList" OnCollapsed="ManufacturingPacketList_OnCollapsed"
                                                                  Grid.Row="0"/>
                            <DockPanel LastChildFill="False"
                                       Grid.Row="1">
                                <Button DockPanel.Dock="Right"
                                        Content="Approve"
                                        x:Name="ApproveButton"
                                        Height="35" Padding="20,5" Margin="5"
                                        Click="ApproveButton_Click"/>
                            </DockPanel>
                        </Grid>
                    </Border>
                </dynamicgrid:DynamicSplitPanel.Detail>

            </dynamicgrid:DynamicSplitPanel>
            
        </dynamicgrid:DynamicSplitPanel.Detail>
        
    </dynamicgrid:DynamicSplitPanel>

</UserControl>