How to stretch a content on Pivot.RightHeader horizontal?-CodePudding

Blend reveals Pivot's template and the ContentPresenter found beneath but where can I find the default RightHeaderTemplate ? I wish to stretch a RelativePanel onto the entire right header area.

<ContentPresenter x:Name="RightHeaderPresenter" ContentTemplate="{TemplateBinding RightHeaderTemplate}" Grid.Column="2" Content="{TemplateBinding RightHeader}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

For example the TabView.TabStripFooter can offer this by default.

Tried this for size but to no avail:

<Pivot x:Name="MyPivotTable" ItemsSource="{x:Bind ViewModel.MyItems}" SelectedItem="{x:Bind ViewModel.ActiveDocument, Mode=OneWay}">
    <Pivot.RightHeader>
        <RelativePanel Width="{Binding ElementName=MyPivotTable, Path=RightHeader.ActualWidth}">

Control is being aligned to the most right:

CodePudding user response：

You can find the default styles, templates in the generic.xaml. AFAIK, you should be able to find the generic.xaml here:

C:\Users\???.nuget\packages\microsoft.windowsappsdk\1.1.5\lib\net5.0-windows10.0.17763.0\Microsoft.WinUI\Themes\generic.xaml

UPDATE

You can stretch the RightHeader area by changing the ColumnDefinitions. Since the RightHeaderPresenter is assigned to Grid.Column="2", this should work:

<PivotPanel
    x:Name="Panel"
    VerticalAlignment="Stretch">
    <Grid x:Name="PivotLayoutElement">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="*" />
            <!--
            <ColumnDefinition Width="Auto" />
            -->
            <ColumnDefinition Width="*" />
        </Grid.ColumnDefinitions>

...

</PivotPanel>