protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
{
base.PrepareContainerForItemOverride(element, item);
RibbonThumbnail tn = element as RibbonThumbnail;
if (tn != null)
{
tn.Width = ThumbnailSize.Width;
tn.Height = CalculateInRibbonThumbnailHeight();
Stretch stretch = RibbonGallery.GetStretch(this);
RibbonGallery.SetStretch(tn, stretch);
}
}