internal static void InvalidateScrollBarVisibility(ScrollViewer submenuScrollViewer)
{
if (submenuScrollViewer != null)
{
// The scroll viewer needs to re-evaluate the visibility of the scrollbars
// and that happens in its MeasureOverride call. Also note that we need to
// make this invalidate call async because we may already be within a
// ScrollViewer measure pass, by which we would miss the boat.
submenuScrollViewer.Dispatcher.BeginInvoke((Action)delegate()
{
submenuScrollViewer.InvalidateMeasure();
},
DispatcherPriority.Render);
}
}
