How do I style states of a Pivot's HeaderTemplate? - win-universal-app

Question

How do change the visual state of the TextBlock by hooking into the same states that PanelHeaderItem template uses?
Code Sample:
<Pivot>
<Pivot.HeaderTemplate>
<DataTemplate>
<Grid>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Text" Storyboard.TargetProperty="Opacity" >
<DiscreteObjectKeyFrame KeyTime="0" Value="1" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<TextBlock x:Key="Text" Text="{Binding}" Opacity="0.5" />
</Grid>
</DataTemplate>
</Pivot.HeaderTemplate>
</Pivot>
The VisualStateManager.VisualStateGroups tag is my failed attempt at trying to change the state of the TextBlock using the same VisualStates that are used in the PanelHeaderItem template. If there's a way to target the TextBlock from within the PanelHeaderItem's VisualStateManager.VisualStateGroups, that would also work, but I don't know how.
Ideally looking for a pure XAML way to do this (no C#).

Answer 1

To change the properties of Textblock you can use RelativeSource in binding. <TextBlock Text="{Binding Header}" Opacity="{Binding RelativeSource={RelativeSource TemplatedParent},Path=Opacity}"/> In this Binding I'm binding ContentPresenter Opacity to Textblock Opacity.
<Pivot>
<Pivot.HeaderTemplate>
<DataTemplate>
<Grid>
<TextBlock Text="{Binding Header}" Opacity="{Binding RelativeSource={RelativeSource TemplatedParent},Path=Opacity}"/>
</Grid>
</DataTemplate>
</Pivot.HeaderTemplate>
....
</Pivot>
In below style of PivotHeader i'm changing Opacity to 1 and Forground to Red in Selected VisualState
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="(UIElement.Opacity)"
Duration="0" To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<Style TargetType="PivotHeaderItem">
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}" />
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}" />
<Setter Property="CharacterSpacing" Value="{ThemeResource PivotHeaderItemCharacterSpacing}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Foreground" Value="{ThemeResource SystemControlForegroundBaseMediumBrush}" />
<Setter Property="Padding" Value="{ThemeResource PivotHeaderItemMargin}" />
<Setter Property="Height" Value="48" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="PivotHeaderItem">
<Grid
x:Name="Grid"
Background="{TemplateBinding Background}">
<Grid.Resources>
<Style x:Key="BaseContentPresenterStyle" TargetType="ContentPresenter">
<Setter Property="FontFamily" Value="XamlAutoFontFamily"/>
<Setter Property="FontWeight" Value="SemiBold"/>
<Setter Property="FontSize" Value="15"/>
<Setter Property="TextWrapping" Value="Wrap"/>
<Setter Property="LineStackingStrategy" Value="MaxHeight"/>
<Setter Property="TextLineBounds" Value="Full"/>
<Setter Property="OpticalMarginAlignment" Value="TrimSideBearings"/>
</Style>
<Style x:Key="BodyContentPresenterStyle" TargetType="ContentPresenter" BasedOn="{StaticResource BaseContentPresenterStyle}">
<Setter Property="FontFamily" Value="{ThemeResource PivotHeaderItemFontFamily}" />
<Setter Property="FontWeight" Value="{ThemeResource PivotHeaderItemThemeFontWeight}"/>
<Setter Property="FontSize" Value="{ThemeResource PivotHeaderItemFontSize}"/>
</Style>
</Grid.Resources>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="SelectionStates">
<VisualStateGroup.Transitions>
<VisualTransition From="Unselected" To="UnselectedLocked" GeneratedDuration="0:0:0.33" />
<VisualTransition From="UnselectedLocked" To="Unselected" GeneratedDuration="0:0:0.33" />
</VisualStateGroup.Transitions>
<VisualState x:Name="Disabled">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlDisabledBaseMediumLowBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="Unselected" />
<VisualState x:Name="UnselectedLocked">
<Storyboard>
<DoubleAnimation Storyboard.TargetName="ContentPresenterTranslateTransform"
Storyboard.TargetProperty="X"
Duration="0" To="{ThemeResource PivotHeaderItemLockedTranslation}" />
<DoubleAnimation Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="(UIElement.Opacity)"
Duration="0" To="0" />
</Storyboard>
</VisualState>
<VisualState x:Name="Selected">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimation Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="(UIElement.Opacity)"
Duration="0" To="1" />
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPointerOver">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="UnselectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightAltBaseMediumHighBrush}" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="SelectedPressed">
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenter"
Storyboard.TargetProperty="Foreground" >
<DiscreteObjectKeyFrame KeyTime="0" Value="Red" />
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="Grid"
Storyboard.TargetProperty="Background" >
<DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource SystemControlHighlightTransparentBrush}" />
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<ContentPresenter
x:Name="ContentPresenter" Opacity="0.5"
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}"
Margin="{TemplateBinding Padding}"
FontSize="{TemplateBinding FontSize}"
FontFamily="{TemplateBinding FontFamily}"
FontWeight="{TemplateBinding FontWeight}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<ContentPresenter.RenderTransform>
<TranslateTransform x:Name="ContentPresenterTranslateTransform" />
</ContentPresenter.RenderTransform>
</ContentPresenter>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>