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WPF tag binding to visibility for ScrollViewer ComputedVerticalScrollBarVisibility

I have a ScrollViewer, it scrolls only vertically and shows a vertical scroll bar if it is only necessary:

<ScrollViewer x:Name="sv" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Auto">

I also have a shortcut that I only want to show if the vertical scrollbar shows the ScrollViewer:

<Label Background="DarkBlue" Height="60" Width="70">
            <Label.Style>
                <Style TargetType="Label">
                    <Setter Property="Visibility" Value="Visible"/>
                    <Style.Triggers>
                        <DataTrigger Binding="{Binding ComputedVerticalScrollBarVisibility.Visibility, ElementName=sv}" Value="Hidden">
                            <Setter Property="Visibility" Value="Hidden"/>
                        </DataTrigger>
                    </Style.Triggers>
                </Style>
            </Label.Style>
</Label>

This does not work. I was looking for a solution that I usually find pretty quickly, so this is my first post. Any suggestions on how to do this? I would prefer only the xaml solution, but I could make sure that it uses converters and no.

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2 answers

ComputedVerticalScrollBarVisibility Visibility.   , ComputedVerticalScrollBarVisibility, ComputedVerticalScrollBarVisibility.Visibility.

-, Value Collapsed, Hidden

:

<DataTrigger Binding="{Binding ComputedVerticalScrollBarVisibility,
                               ElementName=sv}" Value="Collapsed">
    <Setter Property="Visibility" Value="Hidden"/>
</DataTrigger>
+5

- :

<Label Background="DarkBlue" Height="60" Width="70"
       Visibility="{Binding ComputedVerticalScrollBarVisibility, ElementName=sv}" />

, . Hidden, Collapsed. , .

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