private void AssociatedObjectOnPreviewMouseWheel(object sender, MouseWheelEventArgs e)
{
_scrollViewer ??= XamlHelpers.FindChild <ScrollViewer>(AssociatedObject);
if (_scrollViewer == null)
{
return;
}
e.Handled = true;
if (e.Delta > 0)
{
_scrollViewer.LineUp();
}
if (e.Delta < 0)
{
_scrollViewer.LineDown();
}
}
protected override void OnAttached()
{
AssociatedObject.PreviewMouseWheel += AssociatedObjectOnPreviewMouseWheel;
_scrollViewer = XamlHelpers.FindChild <ScrollViewer>(AssociatedObject);
}
