title: Image overlay in a flipview
body: <p>I have this XAML code:</p>
  
  <pre><code> &lt;FlipView x:Name="models_list" Width="432" Height="286" Canvas.Left="89" Canvas.Top="80" ScrollViewer.VerticalScrollBarVisibility="Hidden" &gt;
              &lt;FlipView.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
                      &lt;Grid x:Name="imgGrid"&gt;
                          &lt;Image x:Name="img1" Source = "{Binding}" Stretch="Fill" /&gt;
                          &lt;Image x:Name="img2" Source = "{Binding}" Stretch="Fill" /&gt;
                      &lt;/Grid&gt;
                  &lt;/DataTemplate&gt;
              &lt;/FlipView.ItemTemplate&gt;
          &lt;/FlipView&gt;
  </code></pre>
  
  <p>I want to be able to overlay images on this basic image 'img1' in the grid 'imgGrid'. img1 gets populated when i add items to flipview through this code:</p>
  
  <pre><code>        foreach (StorageFile model in models)
          {
              models_list.Items.Add(new Uri("ms-appx:///Images/Models/" + model.Name));
          }
  </code></pre>
  
  <p>How can I bind img2 to get values on a specific event?</p>