在为Win 8 Metro控件编写自定义ControlTemplate(XAML)时,我们需要使用VisualStateManager根据VisualState转换更新控件.我在MSDN上看到下面的示例,但是我找不到VisualStateGroup“CommonStates”的文档,除了“PointerOver”和“Normal”之外还定义了哪些其他VisualStates？您是否需要深入了解SDK以找到按钮的默认ControlTemplate？如果是这样,在哪里？

<ControlTemplate TargetType="Button">
  <Grid >
    <VisualStateManager.VisualStateGroups>
      <VisualStateGroup x:Name="CommonStates">

        <VisualStateGroup.Transitions>

          <!--Take one half second to transition to the PointerOver state.-->
          <VisualTransition To="PointerOver" 
                              GeneratedDuration="0:0:0.5"/>
        </VisualStateGroup.Transitions>

        <VisualState x:Name="Normal" />

        <!--Change the SolidColorBrush,ButtonBrush,to red when the
            Pointer is over the button.-->
        <VisualState x:Name="PointerOver">
          <Storyboard>
            <ColorAnimation Storyboard.TargetName="ButtonBrush" 
                            Storyboard.TargetProperty="Color" To="Red" />
          </Storyboard>
        </VisualState>
      </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>
    <Grid.Background>
      <SolidColorBrush x:Name="ButtonBrush" Color="Green"/>
    </Grid.Background>
  </Grid>
</ControlTemplate>

[TemplateVisualState(GroupName="CommonStates",Name="Normal")]
[TemplateVisualState(GroupName="CommonStates",Name="PointerOver")]