Hey!

I am trying to develop an application which includes xamDockManager as the main layout manager.

I want to show the number of content panes that are currently within a TabGroupPane and this should be updated at runtime even when layout is updated.

I came around a workthrough where I bound the textblock text to the number of MenuItems in the "filesMenu"

<Style x:Key="{x:Static dockManager:TabGroupPane.DocumentFilesMenuItemStyleKey}" TargetType="{x:Type MenuItem}" BasedOn="{StaticResource TopLevelHeaderMenuItemStyleBase}" >
<Setter Property="Width" Value="50" />
<Setter Property="Height" Value="28" />
<Setter Property="Foreground" Value="{StaticResource ForegroundBrush}" />
<Setter Property="Margin" Value="0,1,0,0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type MenuItem}">
<controls:CardPanel>
<Border Background="{TemplateBinding Background}" CornerRadius="3" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="True">
<Border.Effect>
<DropShadowEffect Direction="-10" ShadowDepth="5" BlurRadius="2"></DropShadowEffect>
</Border.Effect>
<Grid VerticalAlignment="Stretch" Width="45" Height="28">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" x:Name="MenuPaneCount" FontSize="12" FontWeight="Bold" Margin="4,2,4,2" Text="{Binding Path=Items.Count,RelativeSource={RelativeSource AncestorType={x:Type MenuItem}},Converter={StaticResource MathConverter},ConverterParameter=@VALUE-1}" Foreground="{StaticResource ForegroundBrush}" VerticalAlignment="Center" HorizontalAlignment="Center"></TextBlock>
<Path Grid.Column="1" x:Name="AllItemsInViewGlyph" HorizontalAlignment="Center" VerticalAlignment="Center" Height="6" Width="8" Stretch="Fill" Data="M 3,8 C3,8 7.5,12.5 7.5,12.5 7.5,12.5 12,8 12,8 12,8 3,8 3,8 z" Fill="{TemplateBinding Foreground}" />
<Path Grid.Column="1" x:Name="HasItemsOutOfViewGlyph" Visibility="Collapsed" HorizontalAlignment="Center" VerticalAlignment="Center" Height="10" Width="10" Stretch="Fill" Data="M0,3 C0,3 9,3 9,3 9,3 4.5,7.5 4.5,7.5 4.5,7.5 0,3 0,3 z M0,0 L9,0 9,2 0,2 0,0 z" Fill="{TemplateBinding Foreground}" />
</Grid>
</Border>
<Popup x:Name="PART_Popup" AllowsTransparency="true" Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" IsOpen="{Binding IsSubmenuOpen, RelativeSource={x:Static RelativeSource.TemplatedParent}}">
<Grid Height="Auto" Width="Auto" x:Name="MenuItem">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="27" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Rectangle Grid.ColumnSpan="2" Opacity="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="0,0,0,0" Stroke="{DynamicResource {x:Static dockManager:DockManagerBrushKeys.MenuItemOuterBorderFillKey}}" StrokeThickness="1" Fill="{StaticResource TabBackground}" SnapsToDevicePixels="True" />
<ScrollViewer Grid.ColumnSpan="2" CanContentScroll="True" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}" Margin="3">
<ItemsPresenter KeyboardNavigation.TabNavigation="Cycle" KeyboardNavigation.DirectionalNavigation="Cycle" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</ScrollViewer>
</Grid>
</Popup>
</controls:CardPanel>
<ControlTemplate.Triggers>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.3" />
</Trigger>
<DataTrigger Binding="{Binding Path=(dockManager:DocumentTabPanel.HasItemsOutOfView), RelativeSource={RelativeSource AncestorType={x:Type dockManager:TabGroupPane}}}" Value="True">
<Setter TargetName="HasItemsOutOfViewGlyph" Property="Visibility" Value="Visible" />
<Setter TargetName="AllItemsInViewGlyph" Property="Visibility" Value="Collapsed" />
</DataTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<!-- Hottracked State -->
<DataTrigger Binding="{Binding IsHighlighted, RelativeSource={x:Static RelativeSource.Self}}" Value="True">
<Setter Property="Foreground" Value="{StaticResource PaneTabItemButtonHover}" />
<Setter Property="BorderBrush" Value="#ff5f5f5f" />
</DataTrigger>

<!-- IsSubmenuOpen State -->
<DataTrigger Binding="{Binding IsSubmenuOpen, RelativeSource={x:Static RelativeSource.Self}}" Value="True">
<Setter Property="Foreground" Value="{StaticResource PaneTabItemButtonHover}" />
<Setter Property="BorderBrush" Value="#ff5f5f5f" />
</DataTrigger>

<Trigger Property="IsEnabled" Value="False">
<Setter Property="Opacity" Value="0.3" />
</Trigger>

</Style.Triggers>
</Style>

But it only updates when the filesMenu is actually clicked, which I think is because of the FilesMenuOpening event.

Any help would be appreciated.

Thank You!