Showing SelectedItem Details to its side

Question

I've a ListView bound to an ObservableCollection<Foo>. On selecting a ListViewItem I display the details of the SelectedItem(Foo members) in a container. It works fine.

Now all I want is to display the details just next to the SelectedItem. ie, If I select the fourth ListViewItem then the Container's Top should be the same as the ListViewItem's Top. How would I sync their position provided it should create any problem even while scrolling the List.

P.S: Scrollbars are hidden

Answer 1

Does the detail need to be in a separate container? I may be misunderstanding your example, but I would have thought you could achieve what you wanted by adding the details section to the item template for your list items and then hiding/showing it based on the IsSelected flag:

<ListView ItemsSource="{Binding}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <DockPanel>
                    <ContentControl DockPanel.Dock="Right" Name="DetailsControl" Content="{Binding}" ContentTemplate="{StaticResource DetailsTemplate}" />
                    <TextBlock Text="{Binding}" />
                </DockPanel>
                <DataTemplate.Triggers>
                    <DataTrigger Binding="{Binding (ListViewItem.IsSelected), RelativeSource={RelativeSource FindAncestor, AncestorType=ListViewItem}}" Value="False">
                        <Setter TargetName="DetailsControl" Property="Visibility" Value="Hidden" />
                    </DataTrigger>
                </DataTemplate.Triggers>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>

Even if you aren't after exactly this behaviour, I imagine you could get close to what you want by replacing the ContentControl from the example with something else (e.g. a Popup)