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ScrollBarExtensions

Description​

ScrollBarExtensions adds indicator behavior to native WPF ScrollBar. ScrollBarExtensions is shown within SmoothScrollViewer; it is not a separate gallery destination.

The gallery scroll viewer enables the indicator behavior through its internal scrollbar template. These images isolate its vertical scrollbar before and after scrolling, with the indicator visible.

Scrollbar before scrolling in light mode Scrollbar before scrolling in dark mode

After scrolling​

Thin scrollbar indicator after scrolling in light mode Thin scrollbar indicator after scrolling in dark mode

Example usage​

<fluence:SmoothScrollViewer Height="160">
    <StackPanel Height="500">
        <TextBlock Text="Top" />
        <TextBlock Margin="0,450,0,0" Text="Bottom" />
    </StackPanel>
</fluence:SmoothScrollViewer>

The Fluence scroll viewer template applies ScrollBarExtensions.IsIndicatorEnabled to its internal scroll bars. A custom scrollbar can set that attached property only when its template supports the Fluence indicator states. A standalone bar has no scroll viewer host and stays visible.

State and behavior​

Attached indicator settings alter the native ScrollBar's indicator presentation during interaction.

Reference​