XFEToolBox

using System.Windows;
using System.Windows.Controls;

namespace XFEToolBox.WpfCore.Behaviors;

public static class ScrollViewerBehavior
{
    public static readonly DependencyProperty VerticalOffsetProperty = DependencyProperty.RegisterAttached("VerticalOffset", typeof(double), typeof(ScrollViewerBehavior), new UIPropertyMetadata(0d, OnVerticalOffsetChanged));
    public static void SetVerticalOffset(FrameworkElement target, double value) => target.SetValue(VerticalOffsetProperty, value);
    public static double GetVerticalOffset(FrameworkElement target) => (double)target.GetValue(VerticalOffsetProperty);
    private static void OnVerticalOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) => (target as ScrollViewer)?.ScrollToVerticalOffset((double)e.NewValue);

    public static readonly DependencyProperty HorizontalOffsetProperty = DependencyProperty.RegisterAttached("HorizontalOffset", typeof(double), typeof(ScrollViewerBehavior), new UIPropertyMetadata(0d, OnHorizontalOffsetChanged));
    public static void SetHorizontalOffset(FrameworkElement target, double value) => target.SetValue(HorizontalOffsetProperty, value);
    public static double GetHorizontalOffset(FrameworkElement target) => (double)target.GetValue(HorizontalOffsetProperty);
    private static void OnHorizontalOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) => (target as ScrollViewer)?.ScrollToHorizontalOffset((double)e.NewValue);
}