private void CreateContainers()
{
var generator = Owner.ItemContainerGenerator;
if (Owner.Bounds.Size.IsDefault)
{
if ((Items.Count() > 0) && !_estimated)
{
PdmLogger.Log(0, PdmLogger.IndentEnum.In, $"Estimate {Id} Items:{Items} ");
var materialized = generator.Materialize(0, Items.ElementAt(0));
VirtualizingPanel.Children.Insert(0, materialized.ContainerControl);
materialized.ContainerControl.Measure(Size.Infinity);
VirtualizingAverages.AddContainerSize(GroupControl.TemplatedParent, Items.ElementAt(0), materialized.ContainerControl);
//VirtualizingPanel.Children.RemoveAt(0);
//generator.Dematerialize(0, 1);
//ItemsPresenter.InvalidateMeasure();
_estimated = true;
PdmLogger.Log(1, PdmLogger.IndentEnum.Out, $"Estimated {Id} Items:{Items} ");
}
}
else if (Items != null && VirtualizingPanel.IsAttachedToVisualTree)
{
_realizedChildren.AddChildren();
}
_estimatedSize = VirtualizingAverages.GetEstimatedExtent(GroupControl.TemplatedParent, Items, Vertical);
}
