private static void OnMouseWheel(object sender, MouseWheelEventArgs e)
{
ScrollViewer viewer = sender as ScrollViewer;
if (e.Handled)
{
return;
}
double offset = ScrollViewerExtensions.CoerceVerticalOffset(viewer, viewer.VerticalOffset - (double)e.Delta);
viewer.ScrollToVerticalOffset(offset);
e.Handled = true;
}
private static void ScrollByVerticalOffset(ScrollViewer viewer, double offset)
{
offset += viewer.VerticalOffset;
offset = ScrollViewerExtensions.CoerceVerticalOffset(viewer, offset);
viewer.ScrollToVerticalOffset(offset);
}
