How to set a wide scroll bar, instead of thin?

[alexandrehtrb]

Hello,

How do I configure a ScrollBar to always be wide, instead of thin?
Like in the image below, I want the vertical scroll bar to be wide, just like the horizontal scroll bar is.

[timunie]

I don't get your point? You can set AllowAutoHide="false" on the ScrollViewer if that was your question.

[alexandrehtrb]

I already set AllowAutoHide="false" (including in internal ScrollViewer, as mentioned here), but it didn't work.

I want a "fat" vertical scroll bar, like this:

The thing is, it appears that when there is horizontal and vertical scroll, the vertical scroll bar becomes thin and only the horizontal is fat:

I posted this question here instead of AvaloniaEdit because I am having this same issue with DataGrid

[timunie]

Please lookup the original styles. Maybe the controls you mention needs a different setter here.

[stevemonaco]

I have no issue with the following in Fluent Theme:

<Window.Styles>
    <Style Selector="ScrollBar">
        <Setter Property="AllowAutoHide" Value="False" />
    </Style>
</Window.Styles>

<Grid>
    <ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible">
        <TextBlock Text="{Binding Greeting}" />
    </ScrollViewer>
</Grid>