public void ClearElementToElementFactory(UIElement element)
{
m_owner.OnElementClearing(element);
if (m_owner.ItemTemplateShim != null)
{
if (m_ElementFactoryRecycleArgs == null)
{
// Create one.
m_ElementFactoryRecycleArgs = new ElementFactoryRecycleArgs();
}
var context = m_ElementFactoryRecycleArgs;
context.Element = element;
context.Parent = m_owner;
m_owner.ItemTemplateShim.RecycleElement(context);
context.Element = null;
context.Parent = null;
}
else
{
// No ItemTemplate to recycle to, remove the element from the children collection.
var children = m_owner.Children;
int childIndex = 0;
childIndex = children.IndexOf(element);
if (childIndex < 0)
{
throw new InvalidOperationException("ItemsRepeater's child not found in its Children collection.");
}
children.RemoveAt(childIndex);
}
var virtInfo = ItemsRepeater.GetVirtualizationInfo(element);
virtInfo.MoveOwnershipToElementFactory();
m_phaser.StopPhasing(element, virtInfo);
if (m_lastFocusedElement == element)
{
// Focused element is going away. Remove the tracked last focused element
// and pick a reasonable next focus if we can find one within the layout
// realized elements.
int clearedIndex = virtInfo.Index;
MoveFocusFromClearedIndex(clearedIndex);
}
REPEATER_TRACE_PERF("ElementCleared");
}