NuGet package for .NET 6+ that adds attached events for handling inputs from tiltable scroll wheels and provides an easy way to improve scrolling behavior in your application. It's lightweight, easy to use, and provides documentation through intellisense.

Requires the Microsoft.Xaml.Behaviors.Wpf nuget package.

NuGet	Version
HorizontalScroll

• Adds attached events for receiving horizontal mouse wheel input:
  HorizontalScroll.PreviewMouseWheelTilt
HorizontalScroll.MouseWheelTilt
• Adds behaviors to enable horizontal scrolling for all WPF controls that use ScrollViewer.
  • Adjustable sensitivity
  • Also adds (toggleable) support for Shift+Scroll

1. Behaviors
   1. HorizontalScrollBehavior
   2. AttachHorizontalScrollBehavior
2. Events

Note: No xmlns declarations are required to use HorizontalScroll in XAML.

HorizontalScrollBehavior is a ScrollViewer behavior that adds support for scrolling horizontally by tilting the mouse wheel or by holding the Shift key while scrolling up or down.
It can be attached to a specific ScrollViewer in the usual way through XAML, or to all ScrollViewers in a scope (including the ones inside of other controls, like a ListBox or DataGrid) with a target-typed style and an EventSetter.

Attaching to a specific ScrollViewer:

<ScrollViewer xmlns:i="http://schemas.microsoft.com/xaml/behaviors"> <i:Interaction.Behaviors> <HorizontalScrollBehavior /> </i:Interaction.Behaviors> </ScrollViewer>

To attach it to all of the ScrollViewer controls in a scope, create a target-typed style resource and an EventSetter for the Loaded event:

<Application.Resources> <Style x:Key="EnableHorizontalScrollStyle" TargetType="{x:Type ScrollViewer}"> <EventSetter Event="Loaded" Handler="ScrollViewer_Loaded" /> </Style> </Application.Resources>

And attach the behavior in the code-behind:

private void ScrollViewer_Loaded(object sender, RoutedEventArgs e) { // Tip: You can set the Magnitude property (to a value or binding) in the HorizontalScrollBehavior constructor. Interaction .GetBehaviors((ScrollViewer)sender) .Add(new HScroll.HorizontalScrollBehavior( /* magnitude: 0.5 | magnitudeBinding: new Binding() */ )); }

You can change the scrolling sensitivity with the Magnitude DependencyProperty, and/or disable the Shift+ScrollWheel input binding with the EnableShiftScroll DependencyProperty.

In situations where you want to apply a HorizontalScrollBehavior to a specific control's internal ScrollViewer without affecting list items, or in cases where the ScrollViewer isn't available when the behavior would normally be attached (such as when setting ListView.View), you can use AttachHorizontalScrollBehavior to attach it on the attached control's Loaded event. It works by searching the descendants and/or ancestors of the control for a ScrollViewer, and attaches a HorizontalScrollBehavior to it.

<ListView xmlns:i="http://schemas.microsoft.com/xaml/behaviors"> <i:Interaction.Behaviors> <AttachHorizontalScrollBehavior /> </i:Interaction.Behaviors> <ListView.View> <GridView> <GridViewColumn /> </GridView> </ListView.View> </ListView>

You can fine-tune the search behavior for finding the ScrollViewer with the SearchMode & SearchDepth properties.
The search mode determines whether ancestors and/or descendants are searched, and in what order.
The search depth determines how many layers of ancestor/descendant controls can be searched.

HorizontalScroll adds two attached events for all subclasses of UIElement:

You can get the horizontal delta value from MouseWheelEventArgs.Delta.
A positive delta means the wheel was tilted right, negative values mean it was tilted left.

Usually the delta value is -120 (left) or 120 (right), but this should not be relied upon as MSDN says other values are allowed in order to perform smaller scrolling increments.

<TextBox x:Name="MyTextBox" HorizontalScroll.PreviewMouseWheelTilt="MyTextBox_PreviewMouseWheelTilt" HorizontalScroll.MouseWheelTilt="MyTextBox_PreviewMouseWheelTilt" />

private void TextBox_PreviewMouseWheelTilt(object sender, MouseWheelEventArgs e) { // do something... // setting e.Handled to true here will prevent the MouseWheelTilt event from firing. } private void TextBox_MouseWheelTilt(object sender, MouseWheelEventArgs e) { // do something... }