src/StructuredLogViewer/Controls/BuildControl.xaml

<UserControl x:Class="StructuredLogViewer.Controls.BuildControl"
             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:StructuredLogViewer.Controls"
             xmlns:structuredLogViewer="clr-namespace:StructuredLogViewer"
             xmlns:structuredLogger="clr-namespace:Microsoft.Build.Logging.StructuredLogger;assembly=StructuredLogger"
             mc:Ignorable="d"
             d:DataContext="{d:DesignInstance structuredLogger:Build}"
             d:DesignHeight="300" d:DesignWidth="300">

  <local:SplitterPanel Orientation="Vertical" FirstChildRelativeSize="*" SecondChildRelativeSize="50">

    <local:SplitterPanel.FirstChild>
      <local:SplitterPanel FirstChildRelativeSize="1*" SecondChildRelativeSize="3*">
        <local:SplitterPanel.FirstChild>
          <TabControl x:Name="leftPaneTabControl" TabStripPlacement="Bottom" Margin="0" Padding="0">
            <TabItem x:Name="searchLogTab" Header="Search Log">
              <local:SearchAndResultsControl x:Name="searchLogControl"></local:SearchAndResultsControl>
            </TabItem>

            <TabItem x:Name="propertiesAndItemsTab" Header="Properties and items">
              <DockPanel>
                <Border DockPanel.Dock="Top"
                    BorderThickness="0,0,0,1"
                    Background="{DynamicResource Theme_InfoBarBackground}"
                    BorderBrush="Gray"
                    x:Name="projectContextBorder"
                    Visibility="Collapsed"
                    Padding="4,2,4,2"
                    MinHeight="27">
                  <DockPanel>
                    <TextBlock DockPanel.Dock="Left" VerticalAlignment="Center" Text="Project: " />
                    <ContentControl Focusable="false" DockPanel.Dock="Top" VerticalAlignment="Center" x:Name="propertiesAndItemsContext" />
                  </DockPanel>
                </Border>
                <local:SearchAndResultsControl x:Name="propertiesAndItemsControl"></local:SearchAndResultsControl>
              </DockPanel>
            </TabItem>

            <TabItem x:Name="filesTab" Header="Files" Visibility="Collapsed">
              <local:SearchAndResultsControl x:Name="filesTree"></local:SearchAndResultsControl>
            </TabItem>

            <TabItem x:Name="findInFilesTab" Header="Find in Files" Visibility="Collapsed">
              <local:SearchAndResultsControl x:Name="findInFilesControl" WatermarkContent="Search in files"></local:SearchAndResultsControl>
            </TabItem>
          </TabControl>
        </local:SplitterPanel.FirstChild>
        <local:SplitterPanel.SecondChild>

          <local:SplitterPanel>
            <local:SplitterPanel.FirstChild>
              <TabControl x:Name="centralTabControl" 
                          TabStripPlacement="Bottom" 
                          SelectedIndex="0"
                          MinWidth="10">
                <TabItem x:Name="mainTreeTab" Header="Log">
                  <TreeView x:Name="treeView"
                            BorderBrush="Transparent"
                            BorderThickness="0"
                            VirtualizingPanel.IsVirtualizing="True"
                            VirtualizingPanel.VirtualizationMode="Recycling"
                            TreeViewItem.Selected="TreeViewItem_Selected"
                            ItemsSource="{Binding Children}"
                            structuredLogViewer:ScrollViewerHelper.ShiftWheelScrollsHorizontally="True" />
                </TabItem>

                <TabItem x:Name="timelineTab" Header="Timeline">
                  <Grid>
                    <TextBlock x:Name="timelineWatermark" HorizontalAlignment="Center"
                               VerticalAlignment="Center">Rendering timeline...</TextBlock>
                    <local:TimelineControl x:Name="timeline"
                                           Visibility="Hidden"
                                           structuredLogViewer:ScrollViewerHelper.ShiftWheelScrollsHorizontally="True" />
                  </Grid>
                </TabItem>

                <TabItem x:Name="tracingTab" Header="Tracing">
                  <Grid>
                    <TextBlock x:Name="tracingWatermark" HorizontalAlignment="Center"
                               VerticalAlignment="Center">Rendering Trace...</TextBlock>
                    <local:TracingControl x:Name="tracing"
                                           Visibility="Hidden"
                                           structuredLogViewer:ScrollViewerHelper.ShiftWheelScrollsHorizontally="True" />
                  </Grid>
                </TabItem>

                <TabItem x:Name="projectGraphTab" Header="Project Graph">
                  <Grid>
                    <TextBlock x:Name="projectGraphWatermark" HorizontalAlignment="Center"
                               VerticalAlignment="Center">Rendering graph...</TextBlock>
                    <local:ProjectGraphControl x:Name="projectGraphControl" Visibility="Hidden"/>
                  </Grid>
                </TabItem>
              </TabControl>
            </local:SplitterPanel.FirstChild>

            <local:SplitterPanel.SecondChild>
              <local:DocumentWell x:Name="documentWell" Visibility="Collapsed"></local:DocumentWell>
            </local:SplitterPanel.SecondChild>
          </local:SplitterPanel>
        </local:SplitterPanel.SecondChild>
      </local:SplitterPanel>
    </local:SplitterPanel.FirstChild>

    <local:SplitterPanel.SecondChild>
      <Border BorderBrush="Gray"
              BorderThickness="1">
        <ScrollViewer>
          <ListBox x:Name="breadCrumb"
                   BorderThickness="0"
                   BorderBrush="Transparent"
                   ScrollViewer.HorizontalScrollBarVisibility="Disabled"
                   ScrollViewer.CanContentScroll="False"
                   Background="{DynamicResource Theme_InfoBarBackground}">
            <ListBox.ItemsPanel>
              <ItemsPanelTemplate>
                <WrapPanel IsItemsHost="True"/>
              </ItemsPanelTemplate>
            </ListBox.ItemsPanel>
            <ListBox.Resources>
              <Style TargetType="Separator">
                <Setter Property="Template">
                  <Setter.Value>
                    <ControlTemplate>
                      <Polygon Points="0,0 3,3, 0,6" Stroke="{DynamicResource {x:Static SystemColors.InfoTextBrushKey}}" Fill="{DynamicResource {x:Static SystemColors.InfoTextBrushKey}}" />
                    </ControlTemplate>
                  </Setter.Value>
                </Setter>
              </Style>
            </ListBox.Resources>
          </ListBox>
        </ScrollViewer>
      </Border>
    </local:SplitterPanel.SecondChild>

  </local:SplitterPanel>

</UserControl>