internal double AddOneChild(RealizedItemsInfo info)
{
var child = _generator.ContainerFromIndex(_info.Next);
if (child == null)
{
var materialized = _generator.Materialize(_info.Next, _items.ElementAt(_info.Next));
child = materialized.ContainerControl;
_panel.Children.Add(child);
child.Measure(Size.Infinity);
PdmLogger.Log(2, PdmLogger.IndentEnum.Nothing, $"Add new Item {child.DataContext} to {this} {_info._currentOffset:0.00}");
if (VirtualizingAverages.AddContainerSize(_groupControl.TemplatedParent, _items.ElementAt(_info.Next), child))
{
_owner.InvalidateMeasure();
}
}
else
{
if (child is GroupItem gi)
{
gi.Presenter?.InvalidateMeasure();
}
if (_id == 402)
{
}
child.Measure(Size.Infinity);
PdmLogger.Log(2, PdmLogger.IndentEnum.Nothing, $"Add old Item {child.DataContext} to {this} {_info._currentOffset:0.00}");
if (VirtualizingAverages.AddContainerSize(_groupControl.TemplatedParent, _items.ElementAt(_info.Next), child))
{
_owner.InvalidateMeasure();
}
}
return(_info.Vert ? child.DesiredSize.Height : child.DesiredSize.Width);
}
internal void AddGroup(RealizedItemsInfo info, IItemContainerGenerator generator, int scrollPos)
{
var previousNumInfullView = NumInFullView;
RemoveOld();
foreach (var item in generator.Containers)
{
var res = item.ContainerControl.TranslatePoint(new Point(0, 0), _panel);
var itemPos = (item.Item is IGroupingView gv) ? gv.ItemScrollStart : item.Index + info.ScrollOffset;
if (!RealizedIndex.TryGetValue(itemPos, out var realizedInfo))
{
realizedInfo = new RealizedItemInfo();
RealizedIndex.Add(itemPos, realizedInfo);
}
realizedInfo.Set(item);
realizedInfo.RelativeOffset = res.Value.Y;
}
NumInFullView = GetNumInView(scrollPos);
if (NumInFullView == 8)
{
}
if (previousNumInfullView != NumInFullView)
{
_scrollContentPresenter.InvalidateArrange();
}
}
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);
}
}