/// <summary>
/// Initializes a new instance of the <see cref="ItemVirtualizer"/> class.
/// </summary>
/// <param name="owner"></param>
public ItemVirtualizer(ItemsPresenter owner)
{
Owner = owner;
_scrollViewer = VirtualizingPanel.FindAncestorOfType <ScrollViewer>();
if ((owner.TemplatedParent is ItemsControl ic) && !(owner.TemplatedParent is GroupItem))
{
GroupControl = new GroupController(ic, Vertical);
}
public RealizedItems(ItemsPresenter owner, GroupController groupControl, int id)
{
_owner = owner;
_panel = owner.Panel;
_items = owner.Items;
_generator = owner.ItemContainerGenerator;
_scrollViewer = owner.FindAncestorOfType <ScrollViewer>();
_id = id;
_cache = owner.VirtualizingCache;
_groupControl = groupControl;
if (owner.VirtualizationMode == ItemVirtualizationMode.Logical)
{
_info = new RealizedItemsInfo2(_items, groupControl.Vertical, _cache, groupControl.TemplatedParent);
}
else
{
_info = new RealizedItemsInfo(_items, groupControl.Vertical, _cache, groupControl.TemplatedParent);
}
}