private void OnItemContainerGeneratorStatusChanged(object sender, EventArgs e)
{
if (this.ItemContainerGenerator.Status == GeneratorStatus.ContainersGenerated)
{
RepopulateCategoryFilters();
SynchronizeWithCurrentItem();
if (_itemsPresenter != null)
{
ItemsHostSite = (Panel)(ItemsPanel.FindName(RibbonGallery.ItemsHostPanelName, _itemsPresenter));
}
}
}