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我面临着很难找到解决这个问题的方法。我有一个控件模板，其中有一个内容演示者和一个自定义视觉状态管理器，在 SelectionStates 组下具有视觉状态 Selected 和 UnSelected。在内容演示者的内容模板中，我有一个椭圆，我想根据视觉状态对其 Fill 属性进行动画处理。这是不可能的，因为椭圆位于内容演示者的内容模板内。是否有任何间接的解决方法可以做到这一点。下面是我的模板

<Style TargetType="local:TabNavigationItem">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="local:TabNavigationItem">
                <Grid>
                    <vsm:VisualStateManager.VisualStateGroups>
                        <vsm:VisualStateGroup x:Name="SelectionStates">
                            <vsm:VisualState x:Name="Selected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabStripEllipse"
                                                   Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <SolidColorBrush Color="#FF3B5A82"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </vsm:VisualState>
                            <vsm:VisualState x:Name="UnSelected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabStripEllipse"
                                                   Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <SolidColorBrush Color="Transparent"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </vsm:VisualState>
                        </vsm:VisualStateGroup>
                    </vsm:VisualStateManager.VisualStateGroups>

                    <ContentPresenter>
   <ContentPresenter.ContentTemplate>
    <DataTemplate x:Key="tabNavigationItemTemplate">
     <Border Padding="1">
      <Ellipse x:Name="TabStripEllipse" 
       Fill="Transparent"
       Stroke="#FF3B5A82" Cursor="Hand" 
       Height="8" Width="8"/>
     </Border>
    </DataTemplate>
   </ContentPresenter.ContentTemplate>
  </ContentPresenter>

 </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

感谢您的想法和建议。

您可能还想将我的 xaml 文件如下所示.. 但是与外部模板的目标类型相关的属性应该可以通过内部数据模板访问。

<Style TargetType="local:TabNavigationItem">
    <Setter Property="ItemContentTemplate" Value="{StaticResource contentTemplate}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="local:TabNavigationItem">
                <Grid>

                    <Border>
                        <ContentPresenter>
                            <ContentPresenter.ContentTemplate>

                                <vsm:VisualStateManager.VisualStateGroups>
                                    <vsm:VisualStateGroup x:Name="SelectionStates">
                                        <vsm:VisualState x:Name="Selected">
                                            <Storyboard>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabItemPresenter"
                                                               Storyboard.TargetProperty="Background">
                                                    <DiscreteObjectKeyFrame KeyTime="0">
                                                        <DiscreteObjectKeyFrame.Value>
                                                            <SolidColorBrush Color="#FF3B5A82"/>
                                                        </DiscreteObjectKeyFrame.Value>
                                                    </DiscreteObjectKeyFrame>
                                                </ObjectAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </vsm:VisualState>
                                        <vsm:VisualState x:Name="UnSelected">
                                            <Storyboard>
                                                <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabItemPresenter"
                                                               Storyboard.TargetProperty="Background">
                                                    <DiscreteObjectKeyFrame KeyTime="0">
                                                        <DiscreteObjectKeyFrame.Value>
                                                            <SolidColorBrush Color="Transparent"/>
                                                        </DiscreteObjectKeyFrame.Value>
                                                    </DiscreteObjectKeyFrame>
                                                </ObjectAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </vsm:VisualState>
                                    </vsm:VisualStateGroup>
                                </vsm:VisualStateManager.VisualStateGroups>

                                <Border Padding="1">
                                    <Ellipse x:Name="TabStripEllipse" 
                                        Fill="Transparent"
                                        Stroke="#FF3B5A82" Cursor="Hand" 
                                        Height="8" Width="8"/>
                                </Border>

                            </ContentPresenter.ContentTemplate>
                    </Border>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
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1 回答 1

0

也许您有一个理由以这种方式使用 ContentPresenter。内容呈现器的正常使用将充当绑定到控件属性的内容的占位符。您通常不会使用 ContentPresenter 然后向它​​提供您自己的 DataTemplate。这是我的 Xaml 版本，没有明显不必要的内容演示者：-

<Style TargetType="local:TabNavigationItem">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="local:TabNavigationItem">
                <Grid>
                    <vsm:VisualStateManager.VisualStateGroups>
                        <vsm:VisualStateGroup x:Name="SelectionStates">
                            <vsm:VisualState x:Name="Selected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabStripEllipse"
                                                   Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <SolidColorBrush Color="#FF3B5A82"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </vsm:VisualState>
                            <vsm:VisualState x:Name="UnSelected">
                                <Storyboard>
                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabStripEllipse"
                                                   Storyboard.TargetProperty="Background">
                                        <DiscreteObjectKeyFrame KeyTime="0">
                                            <DiscreteObjectKeyFrame.Value>
                                                <SolidColorBrush Color="Transparent"/>
                                            </DiscreteObjectKeyFrame.Value>
                                        </DiscreteObjectKeyFrame>
                                    </ObjectAnimationUsingKeyFrames>
                                </Storyboard>
                            </vsm:VisualState>
                        </vsm:VisualStateGroup>
                    </vsm:VisualStateManager.VisualStateGroups>    
     <Border Padding="1">
      <Ellipse x:Name="TabStripEllipse" 
       Fill="Transparent"
       Stroke="#FF3B5A82" Cursor="Hand" 
       Height="8" Width="8"/>
     </Border>    
 </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

现在您的 VSM 应该能够找到椭圆。

于 2010-02-03T13:02:19.263 回答