Silverlight - use a ScrollViewer in a TextBox template
- by vladhorby
I'm trying to make a TextBox template and I need to include a ScrollViewer in the template - basically I want to add some content (like line numbers) that needs to scroll along with the normal text.
The default template for the TextBox is like this:
<Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="1" Opacity="1">
<Grid>
<Border x:Name="ReadOnlyVisualElement" Background="#5EC9C9C9" Opacity="0"/>
<Border x:Name="MouseOverBorder" BorderBrush="Transparent" BorderThickness="1">
<ScrollViewer x:Name="ContentElement" BorderThickness="0" IsTabStop="False" Padding="{TemplateBinding Padding}"/>
</Border>
</Grid>
</Border>
If I change the ContentElement from ScrollViewer to Border, for example, the TextBox behaves normally - i just lose the scrolling ability.
Now, if I wrap the ContentElement with a ScrollViewer, it no longer displays the caret and selection - if you type, it still gets updated though.
<Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" CornerRadius="1" Opacity="1">
<Grid>
<Border x:Name="ReadOnlyVisualElement" Background="#5EC9C9C9" Opacity="0"/>
<Border x:Name="MouseOverBorder" BorderBrush="Transparent" BorderThickness="1">
<ScrollViewer ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto" >
<Border x:Name="ContentElement" BorderThickness="0" Padding="{TemplateBinding Padding}" />
</ScrollViewer>
</Border>
</Grid>
</Border>
Any idea why this happens and how can I fix it?
