Come evidenziare la voce selezionata in ItemsControl?

Question

Ho il seguente XAML. Come posso evidenziare l'elemento selezionato in ItemsControl? Posso sovrascrivere il modello di elemento selezionato per ListView ma come ottenere lo stesso risultato per ItemsControl? Esiste un controllo alternativo in grado di visualizzare una raccolta di immagini?

<Window x:Class="ImageScrollDemo.View.MoviePosterView" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:local="clr-namespace:ImageScrollDemo" 
    xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" 
    Title="MoviePosterView" Height="367" Width="725" Foreground="White"> 
<Window.Background> 
    <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> 
     <GradientStop Color="#FF505050" Offset="0"/> 
     <GradientStop Color="#FF202020" Offset="1"/> 
    </LinearGradientBrush> 
</Window.Background> 
<Window.DataContext> 
    <local:MainWindowViewModel /> 
</Window.DataContext> 
<Window.Resources> 
    <local:MainWindowViewModel x:Key="ViewModel" /> 

    <Style TargetType="Image" x:Key="ImageHover"> 
     <Style.Triggers> 
      <Trigger Property="IsMouseOver" Value="True"> 
       <Setter Property="Opacity" Value="1" /> 
       <Setter Property="BitmapEffect"> 
        <Setter.Value> 
         <OuterGlowBitmapEffect GlowColor="Gold" GlowSize="8"/> 
        </Setter.Value> 
       </Setter> 
      </Trigger> 
      <Trigger Property="IsMouseOver" Value="False"> 
       <Setter Property="Opacity" Value="0.7" /> 
      </Trigger> 
     </Style.Triggers> 
    </Style> 
</Window.Resources> 
<i:Interaction.Triggers> 
    <i:EventTrigger EventName="Loaded"> 
     <i:InvokeCommandAction Command="{Binding PopulateMovieGrid}" /> 
    </i:EventTrigger> 
</i:Interaction.Triggers> 
<Grid> 
    <Grid.RowDefinitions> 
     <RowDefinition Height="*" /> 
     <RowDefinition Height="60" /> 
    </Grid.RowDefinitions> 
    <ScrollViewer ScrollViewer.VerticalScrollBarVisibility="Auto"> 
     <ItemsControl Name="itemsCtrl" HorizontalContentAlignment="Center" ItemsSource="{Binding Path=MovieCollection, Mode=TwoWay}"> 
      <ItemsControl.ItemsPanel> 
       <ItemsPanelTemplate> 
        <UniformGrid Columns="5" /> 
       </ItemsPanelTemplate> 
      </ItemsControl.ItemsPanel> 

      <ItemsControl.ItemContainerStyle> 
       <Style TargetType="ContentPresenter"> 
        <Setter Property="ContentTemplate"> 
         <Setter.Value> 
          <DataTemplate> 
           <Border BorderBrush="Black" BorderThickness="5"> 
            <ContentPresenter Content="{Binding}"/> 
           </Border> 
          </DataTemplate> 
         </Setter.Value> 
        </Setter> 
       </Style> 
      </ItemsControl.ItemContainerStyle> 
      <ItemsControl.ItemTemplate> 
       <DataTemplate> 
         <StackPanel Orientation="Vertical" HorizontalAlignment="Center"> 
          <Image Style="{StaticResource ImageHover}" Margin="0,5,0,0" RenderOptions.BitmapScalingMode="HighQuality" SnapsToDevicePixels="True" HorizontalAlignment="Center" Source="{Binding Path=Poster}" Height="150" /> 
          <TextBlock Name="txtTitle" FontSize="10" HorizontalAlignment="Center" TextAlignment="Justify" Text="{Binding Title}" TextWrapping="Wrap" MaxWidth="110" /> 
         </StackPanel> 
       </DataTemplate> 
      </ItemsControl.ItemTemplate> 
     </ItemsControl> 
    </ScrollViewer> 
</Grid> 

Answer 1

Un ItemsControl non tiene il SelectedItem

Se si desidera che il comportamento, vorrei suggerire di sovrascrivere gli stili e modelli per un ListBox

<ListBox Name="itemsCtrl" HorizontalContentAlignment="Center" ItemsSource="{Binding Path=MovieCollection, Mode=TwoWay}"> 

    <ListBox.Resources> 
     <!-- Set SelectedItem Background here --> 
     <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Yellow"/> 
    </ListBox.Resources> 

    <ListBox.ItemsPanel> 
     <ItemsPanelTemplate> 
      <UniformGrid Columns="5" /> 
     </ItemsPanelTemplate> 
    </ListBox.ItemsPanel> 

    <ListBox.ItemTemplate> 
     <DataTemplate> 
       <StackPanel Orientation="Vertical" HorizontalAlignment="Center"> 
        <Image Style="{StaticResource ImageHover}" Margin="0,5,0,0" RenderOptions.BitmapScalingMode="HighQuality" SnapsToDevicePixels="True" HorizontalAlignment="Center" Source="{Binding Path=Poster}" Height="150" /> 
        <TextBlock Name="txtTitle" FontSize="10" HorizontalAlignment="Center" TextAlignment="Justify" Text="{Binding Title}" TextWrapping="Wrap" MaxWidth="110" /> 
       </StackPanel> 
     </DataTemplate> 
    </ListBox.ItemTemplate> 
</ListBox> 

Answer 2

si può anche fare questo attraverso l'espressione mescola l'interattività. Utilizzare il nome dell'evento MouseLeftDown o Evento toccato (in Windows 8.1) in ItemsTemplate nel contenitore superiore (StackPanel o griglia).

xmlns:Core="using:Microsoft.Xaml.Interactions.Core" 
<i:Interaction.Triggers> 
    <i:EventTrigger EventName="MouseLeftDown"> 
     <Core:ChangePropertyAction PropertyName="Background" Value="Green"/> 
    </i:EventTrigger> 
</i:Interaction.Triggers> 

Questo dovrebbe fare il trucco