Microsoft.Windows.Controls.Ribbon.RibbonGalleryCategory.PrepareContainerForItemOverride C# (CSharp) Method

        protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
        {
            RibbonGalleryItem galleryItem = (RibbonGalleryItem)element;
            galleryItem.RibbonGalleryCategory = this;

            RibbonGallery gallery = RibbonGallery;
            if (gallery != null)
            {
                object selectedItem = gallery.SelectedItem;
                if (selectedItem != null)
                {
                    // Set IsSelected to true on GalleryItems that match the SelectedItem
                    if (RibbonGallery.VerifyEqual(item, selectedItem))
                    {
                        galleryItem.IsSelected = true;
                    }
                }
                else if (galleryItem.IsSelected)
                {
                    // If a GalleryItem is marked IsSelected true then synchronize SelectedItem with it
                    gallery.SelectedItem = item;
                }
                else
                {
                    object selectedValue = gallery.SelectedValue;
                    if (selectedValue != null)
                    {
                        // Set SelectedItem if the item's value matches the SelectedValue
                        object itemValue = gallery.GetSelectableValueFromItem(item);
                        if (RibbonGallery.VerifyEqual(selectedValue, itemValue))
                        {
                            galleryItem.IsSelected = true;
                        }
                    }
                }
            }

            galleryItem.SyncKeyTipAndContent();

            base.PrepareContainerForItemOverride(element, item);
        }