在Windows 8中SemanticZoom缩放视图支持对GridView和ListView控件的视图效果进行缩放，它提供一个详细信息视图(ZoomedInView)以让用户查看详细信息，另外提供一个缩小索引视图(ZoomedOutView)让用户快速定位想要查看信息的大概范围。

　　一.想要实现这种效果我们需要使用SemanticZoom控件和CollectionViewSource控件配合使用：

　　　　SemanticZoom控件:

<SemanticZoom.ZoomedOutView> 
   <!--此处填充缩小索引视图的GridView,一般情况下绑定Group.Title--> 
</SemanticZoom.ZoomedOutView> 
<SemanticZoom.ZoomedInView> 
    <!--此处填充平常普通的GridView,显示详细信息--> 
</SemanticZoom.ZoomedInView> 

　　　　CollectionViewSource是一个和前台UI控件进行互动的集合源。

　　　　　　Source:源数据绑定属性

　　　　　　IsSourceGrouped：是否允许分组

　　　　　　View:获取当前与 CollectionViewSource 的此实例关联的视图对象

　　　　　　 View.CollectionGroups：返回该视图关联的所有集合组。

　　二.现在通过一个实例来看如何使用SemanticZoom实现缩放视图，本实例接前一篇文章实例。

　　　　1.前台设置CollectionViewSource控件

<Grid.Resources> 
    <CollectionViewSource x:Name="itemcollectSource" IsSourceGrouped="true" ItemsPath="ItemContent" /> 
</Grid.Resources> 

　　　　2.前台绘制ZoomedInView视图和ZoomedOutView视图GridView

<SemanticZoom x:Name="semanticZoom" VerticalAlignment="Center"> 
            <SemanticZoom.ZoomedOutView> 
                <GridView ScrollViewer.IsHorizontalScrollChainingEnabled="False" > 
                    <GridView.ItemTemplate> 
                        <DataTemplate> 
                            <!--注意此处绑定的是实体集的GroupTitle属性--> 
                            <TextBlock Text="{Binding Group.GroupTitle}" FontSize="24"/> 
                        </DataTemplate> 
                    </GridView.ItemTemplate> 
                    <GridView.ItemsPanel> 
                        <ItemsPanelTemplate> 
                            <WrapGrid ItemWidth="150" ItemHeight="75" MaximumRowsOrColumns="1" VerticalChildrenAlignment="Center" /> 
                        </ItemsPanelTemplate> 
                    </GridView.ItemsPanel> 
                    <GridView.ItemContainerStyle> 
                        <Style TargetType="GridViewItem"> 
                            <Setter Property="Margin" Value="4" /> 
                            <Setter Property="Padding" Value="10" /> 
                            <Setter Property="BorderBrush" Value="Gray" /> 
                            <Setter Property="BorderThickness" Value="1" /> 
                            <Setter Property="HorizontalContentAlignment" Value="Center" /> 
                            <Setter Property="VerticalContentAlignment" Value="Center" /> 
                        </Style> 
                    </GridView.ItemContainerStyle> 
                </GridView> 
            </SemanticZoom.ZoomedOutView> 
            <SemanticZoom.ZoomedInView> 
                <!--设置ScrollViewer.IsHorizontalScrollChainingEnabled="False"--> 
                <GridView Name="gv_Item" ItemsSource="{Binding Source={StaticResource itemcollectSource}}"   
                  SelectedItem="{Binding ItemContent, Mode=TwoWay}" ScrollViewer.IsHorizontalScrollChainingEnabled="False" 
                  Margin="20,140,40,20"  IsSwipeEnabled="True"  > 
                    <GridView.ItemTemplate> 
                        <DataTemplate> 
                            <Grid Width="250" Height="200" Background="#33CCCCCC"> 
                                <Grid.ColumnDefinitions> 
                                    <ColumnDefinition Width="110"></ColumnDefinition> 
                                    <ColumnDefinition></ColumnDefinition> 
                                </Grid.ColumnDefinitions> 
                                <Image Grid.Column="0" Margin="5,0,0,0" Source="{Binding ImageUrl}" Stretch="None"></Image> 
                                <TextBlock Grid.Column="1" Margin="15,15,0,0" Foreground="Black" Text="{Binding txtTitle}" 
                                    FontWeight="Bold" FontSize="16" TextWrapping="Wrap"/> 
                                <TextBlock Grid.Column="1" Margin="15,40,0,0" Foreground="Black" Text="{Binding txtContent}" 
                                    FontWeight="Light" FontSize="14" TextWrapping="Wrap"/> 
                            </Grid> 
                        </DataTemplate> 
                    </GridView.ItemTemplate> 
                    <GridView.ItemsPanel> 
                        <ItemsPanelTemplate> 
                            <VariableSizedWrapGrid Orientation="Vertical" MaximumRowsOrColumns="3" /> 
                        </ItemsPanelTemplate> 
                    </GridView.ItemsPanel> 
                    <GridView.GroupStyle> 
                        <GroupStyle> 
                            <GroupStyle.HeaderTemplate> 
                                <DataTemplate> 
                                    <Grid Margin="1,0,0,6"> 
                                        <Button AutomationProperties.Name="组名称" Content="{Binding GroupTitle}"/> 
                                    </Grid> 
                                </DataTemplate> 
                            </GroupStyle.HeaderTemplate> 
                            <GroupStyle.Panel> 
                                <ItemsPanelTemplate> 
                                    <VariableSizedWrapGrid Orientation="Vertical" Margin="0,0,50,0"/> 
                                </ItemsPanelTemplate> 
                            </GroupStyle.Panel> 
                        </GroupStyle> 
                    </GridView.GroupStyle> 
                </GridView> 
            </SemanticZoom.ZoomedInView> 
        </SemanticZoom>