title: SemanticZoom Handling 3 levels
body: <p>the problem is that i want to handle 3 lvl Zooms.</p>
  
  <p>Lowest level - Articles
  Between level - Mounths
  Top level - Years</p>
  
  <p>For this example i have used custom control and backgrounds.</p>
  
  <p>Top level - is blue.
  Between level - is red.
  Lowest level GridView - is filled with 30 items of custom controls.</p>
  
  <p><strong>Problem is that i some why cant scroll my lowest level GridView.</strong></p>
  
  <p>Here is my xaml:</p>
  
  <pre><code>&lt;SemanticZoom Grid.Row="1"&gt;
              &lt;SemanticZoom.ZoomedInView&gt;
                  &lt;GridView&gt;
                      &lt;SemanticZoom Grid.Row="1"&gt;
                          &lt;SemanticZoom.ZoomedInView&gt;
                              &lt;GridView x:Name="NewsListBox"&gt;
                                  &lt;GridView.Background&gt;
                                      &lt;SolidColorBrush Color="#FF006C67" Opacity="0.5"/&gt;
                                  &lt;/GridView.Background&gt;
                                  &lt;GridView.ItemsPanel&gt;
                                      &lt;ItemsPanelTemplate&gt;
                                          &lt;WrapGrid ItemHeight="200" MaximumRowsOrColumns="5" VerticalChildrenAlignment="Center" /&gt;
                                      &lt;/ItemsPanelTemplate&gt;
                                  &lt;/GridView.ItemsPanel&gt;
                              &lt;/GridView&gt;
                          &lt;/SemanticZoom.ZoomedInView&gt;
                          &lt;SemanticZoom.ZoomedOutView&gt;
                              &lt;GridView Background="Red"/&gt;
                          &lt;/SemanticZoom.ZoomedOutView&gt;
                      &lt;/SemanticZoom&gt;
                  &lt;/GridView&gt;
              &lt;/SemanticZoom.ZoomedInView&gt;
              &lt;SemanticZoom.ZoomedOutView&gt;
                  &lt;GridView Background="Blue"/&gt;
              &lt;/SemanticZoom.ZoomedOutView&gt;
          &lt;/SemanticZoom&gt;
  </code></pre>