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POUnable to prevent automatic horizontal scrolling on TreeView in base class when selecting an item in Silverlight
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  1. POUnable to prevent automatic horizontal scrolling on TreeView in base class when selecting an item in Silverlight
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    copied!<p>I'm trying to prevent the automatic horizontal scrolling on a tree view item when you select it in Silverlight. And I'm trying to do it in a base class.</p> <p>So far I haven't been able to manage it. I have tried the following code, but it executes and then the thing just scrolls anyway when I select it.</p> <pre><code>using System.Windows; using System.Windows.Controls; namespace MyControls { public class CustomTreeView : TreeView { private ScrollViewer _scrollViewer; protected override void OnSelectedItemChanged(RoutedPropertyChangedEventArgs&lt;object&gt; e) { base.OnSelectedItemChanged(e); _scrollViewer.ScrollToHorizontalOffset(0); } public override void OnApplyTemplate() { base.OnApplyTemplate(); _scrollViewer = GetTemplateChild("ScrollViewer") as ScrollViewer; } } } </code></pre> <p>I don't actually want to disable scrolling entirely -- if an item flies off the edge of the tree view I want the user to be able to scroll to it. What I am trying to do is to keep the tree where it is when I select a child node that may be longer than the width of the screen.</p> <p>I've tried RequestBringIntoView on a WrapPanel, but that's WPF-only, it seems. I've also tried doing this on UpdateLayout as well as SelectedItemChanged. All to no avail. I can't seem to find a general solution that I can have another class inherit from and use.</p> <p>Anyone have any ideas?</p> <p>Thanks!</p> <p>-Ari</p> <p>EDIT: The bounty states that I need to be able to do it in XAML. That was a typo on my part. I'll take code solutions as well. Thanks!</p>
 

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