This can be accomplished via attached behaviors.
So instead I came up with the following IgnoreMouseWheelBehavior. Technically it’s not ignoring the MouseWheel, but it is “forwarding” the event back up and out of the ListBox. Check it.
/// <summary>
/// Captures and eats MouseWheel events so that a nested ListBox does not
/// prevent an outer scrollable control from scrolling.
/// </summary>
public sealed class IgnoreMouseWheelBehavior : Behavior<UIElement>
{
protected override void OnAttached( )
{
base.OnAttached( );
AssociatedObject.PreviewMouseWheel += AssociatedObject_PreviewMouseWheel ;
}
protected override void OnDetaching( )
{
AssociatedObject.PreviewMouseWheel -= AssociatedObject_PreviewMouseWheel;
base.OnDetaching( );
}
void AssociatedObject_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
e.Handled = true;
var e2 = new MouseWheelEventArgs(e.MouseDevice,e.Timestamp,e.Delta);
e2.RoutedEvent = UIElement.MouseWheelEvent;
AssociatedObject.RaiseEvent(e2);
}
}
And here’s how you would use it in XAML.
<ScrollViewer Name="IScroll">
<ListBox Name="IDont">
<i:Interaction.Behaviors>
<local:IgnoreMouseWheelBehavior />
</i:Interaction.Behaviors>
</ListBox>
</ScrollViewer>
Where the i
namespace is:
xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
Note that you will need the Microsoft.Xaml.Behaviors.Wpf
nuget package to use this.