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);
}