WPF技术问询：如何向LabelTextBlock的Text中插入StackPanel元素

我希望将<StackPanel>插入到x:Name为LabelTextBlock的<TextBlock>中，以此为标签文本添加更多功能。以下是修改后的自定义AnimatedTextBox样式代码：

<Color x:Key="Color.Control.Border.Focus">#164096</Color>

<Duration x:Key="ColorDuration">0:0:0:0.5</Duration>
<Duration x:Key="AnimationDuration">0:0:0:0.1</Duration>

<Style TargetType="{x:Type local:AnimatedTextBox}">
    <Setter Property="AllowDrop" Value="true" />
    <Setter Property="Background" Value="#FFF"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="BorderBrush" Value="#222"/>
    <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
    <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
    <Setter Property="HorizontalContentAlignment" Value="Left"/>
    <Setter Property="KeyboardNavigation.TabNavigation" Value="None"/>
    <Setter Property="ScrollViewer.PanningMode" Value="VerticalFirst"/>
    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:AnimatedTextBox}">
                <ControlTemplate.Resources />
                <Border x:Name="Border"
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="0 0 0 2"
                        SnapsToDevicePixels="True">
                    <StackPanel>
                        <!-- 修改后的LabelTextBlock，嵌入StackPanel -->
                        <TextBlock x:Name="LabelTextBlock"
                               Focusable="False"
                               FontSize="{TemplateBinding LabelFontSize}"
                               Margin="{TemplateBinding LabelMargin}"
                               VerticalAlignment="Center"
                               Foreground="{TemplateBinding BorderBrush}">
                            <TextBlock.RenderTransform>
                                <TransformGroup>
                                    <ScaleTransform ScaleX="1" ScaleY="1"/>
                                    <TranslateTransform X="0" Y="-2"/>
                                </TransformGroup>
                            </TextBlock.RenderTransform>
                            <TextBlock.Inlines>
                                <InlineUIContainer>
                                    <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
                                        <!-- 绑定原标签文本 -->
                                        <Run Text="{TemplateBinding Label}"/>
                                        <!-- 可在此添加其他UI元素，比如图标、按钮等 -->
                                        <Rectangle Width="8" Height="8" Fill="Red" Margin="4 0 0 0"/>
                                    </StackPanel>
                                </InlineUIContainer>
                            </TextBlock.Inlines>
                        </TextBlock>
                        <Grid>
                            <ScrollViewer x:Name="PART_ContentHost"
                                          Focusable="false"
                                          HorizontalScrollBarVisibility="Hidden"
                                          VerticalScrollBarVisibility="Hidden"/>

                            <TextBlock x:Name="HintTextBlock"
                                       Margin="5 0 0 0"
                                       Focusable="False"
                                       Foreground="{DynamicResource SolidColorBrush.Hint}"
                                       IsHitTestVisible="False"
                                       Opacity="0"
                                       Text="{TemplateBinding Hint}">
                            </TextBlock>
                        </Grid>
                    </StackPanel>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsFocused" Value="True">
                        <Trigger.EnterActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <ColorAnimation Duration="{StaticResource ColorDuration}"
                                                    Storyboard.TargetProperty="BorderBrush.Color"
                                                    To="{StaticResource Color.Control.Border.Focus}"/>
                                    <ColorAnimation Duration="{StaticResource ColorDuration}"
                                                    Storyboard.TargetName="LabelTextBlock"
                                                    Storyboard.TargetProperty="Foreground.Color"
                                                    To="{StaticResource Color.Control.Border.Focus}"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </Trigger.EnterActions>
                        <Trigger.ExitActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <ColorAnimation Duration="{StaticResource ColorDuration}" 
                                                    Storyboard.TargetProperty="BorderBrush.Color"/>
                                    <ColorAnimation Duration="{StaticResource ColorDuration}"
                                                    Storyboard.TargetName="LabelTextBlock"
                                                    Storyboard.TargetProperty="Foreground.Color"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </Trigger.ExitActions>
                    </Trigger>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition Binding="{Binding Path=Text.Length, RelativeSource={RelativeSource Self}}" Value="0"/>
                            <Condition Binding="{Binding Path=IsFocused, RelativeSource={RelativeSource Self}}" Value="false"/>
                        </MultiDataTrigger.Conditions>
                        <MultiDataTrigger.EnterActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"
                                                     To="1"/>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"
                                                     To="1"/>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[1].(TranslateTransform.Y)"
                                                     To="15"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </MultiDataTrigger.EnterActions>
                        <MultiDataTrigger.ExitActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"/>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"/>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="LabelTextBlock"
                                                     Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[1].(TranslateTransform.Y)"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </MultiDataTrigger.ExitActions>
                    </MultiDataTrigger>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition Binding="{Binding Path=Text.Length, RelativeSource={RelativeSource Self}}" Value="0" />
                            <Condition Binding="{Binding Path=IsFocused, RelativeSource={RelativeSource Self}}" Value="true" />
                        </MultiDataTrigger.Conditions>
                        <MultiDataTrigger.EnterActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="HintTextBlock"
                                                     Storyboard.TargetProperty="Opacity"
                                                     To="1"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </MultiDataTrigger.EnterActions>
                        <MultiDataTrigger.ExitActions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation Duration="{StaticResource AnimationDuration}"
                                                     Storyboard.TargetName="HintTextBlock"
                                                     Storyboard.TargetProperty="Opacity"/>
                                </Storyboard>
                            </BeginStoryboard>
                        </MultiDataTrigger.ExitActions>
                    </MultiDataTrigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

修改说明 #

• 移除了LabelTextBlock的Text="{TemplateBinding Label}"属性：TextBlock的Text属性仅支持纯文本，无法直接嵌入UI元素
• 添加<TextBlock.Inlines>节点：通过<InlineUIContainer>包裹<StackPanel>，实现在TextBlock中嵌入任意UI元素
• 保留原标签文本绑定：使用<Run Text="{TemplateBinding Label}" />维持原有标签文本的绑定逻辑
• 可扩展功能：在StackPanel中可以添加图标、按钮等任意UI元素，示例中添加了一个红色小矩形作为演示
• 动画逻辑不受影响：原有的缩放、位移动画依然会作用于整个LabelTextBlock，保持原有的交互效果

内容的提问来源于stack exchange，提问作者Yaron Binder