private void AddChildrenHeaders(
HeadersFootersGeneratorNode headerNode,
Hashtable oldHeaderFooterChildren,
List <AutomationPeer> list)
{
if (m_parentDataGridContext == null)
{
// Add fixed header to the children list
Panel fixedHeaderPanel = m_dataGridControl.FixedHeadersHostPanel;
if (fixedHeaderPanel != null)
{
int index = 0;
foreach (DependencyObject headerFooter in fixedHeaderPanel.Children)
{
HeaderFooterItem headerFooterItem = headerFooter as HeaderFooterItem;
if (headerFooterItem != null)
{
HeaderFooterItemAutomationPeer automationPeer = oldHeaderFooterChildren[headerFooter] as HeaderFooterItemAutomationPeer;
if (automationPeer == null)
{
automationPeer = new HeaderFooterItemAutomationPeer(m_dataGridContext, headerFooter);
}
automationPeer.SetExtraInfo(HeaderFooterItemAutomationPeer.HeaderFooterType.FixedHeader, index);
m_headerFooterChildren[headerFooter] = automationPeer;
list.Add(automationPeer);
}
index++;
}
}
}
if (headerNode != null)
{
DataGridGroupAutomationPeer.AddHeaderPeer(m_dataGridContext, headerNode, list, m_headerFooterChildren, oldHeaderFooterChildren);
}
}
protected override List <AutomationPeer> GetChildrenCore()
{
Group owner = this.Owner;
GroupGeneratorNode generatorNode = owner.GeneratorNode;
if (generatorNode == null)
{
return(null);
}
DataGridContext dataGridContext = owner.DataGridContext;
if (dataGridContext == null)
{
return(null);
}
CustomItemContainerGenerator customItemContainerGenerator = dataGridContext.CustomItemContainerGenerator;
IList <object> items;
bool itemsIsAllItems = false;
// The way Microsoft check if we are called by an automation that support Virtualization.
if ((ItemContainerPatternIdentifiers.Pattern != null) && (owner.IsBottomLevel) && (dataGridContext.DataGridControl.ItemsHost is DataGridItemsHost))
{
items = customItemContainerGenerator.GetRealizedDataItemsForGroup(generatorNode);
}
else
{
items = owner.GetItems();
itemsIsAllItems = true;
}
int itemsCount = (items == null) ? 0 : items.Count;
Hashtable oldDataChildren = m_dataChildren;
Hashtable oldHeaderFooterChildren = m_headerFooterChildren;
// Get header count
HeadersFootersGeneratorNode headerNode = generatorNode.GetHeaderNode();
int headersCount = (headerNode == null) ? 0 : headerNode.ItemCount;
// Get footer count
HeadersFootersGeneratorNode footerNode = generatorNode.GetFooterNode();
int footersCount = (footerNode == null) ? 0 : footerNode.ItemCount;
int childrenCount = itemsCount + headersCount + footersCount;
m_dataChildren = new Hashtable(itemsCount);
m_headerFooterChildren = new Hashtable(headersCount + footersCount);
if (childrenCount == 0)
{
return(null);
}
DataGridContextAutomationPeer dataGridContextAutomationPeer = dataGridContext.Peer;
Hashtable dataGridContextItemsPeer = dataGridContextAutomationPeer.ItemPeers;
DataGridGroupAutomationPeer groupAutomationPeer;
DataGridItemAutomationPeer itemAutomationPeer;
List <AutomationPeer> list = new List <AutomationPeer>(childrenCount);
if (headerNode != null)
{
DataGridGroupAutomationPeer.AddHeaderPeer(dataGridContext, headerNode, list, m_headerFooterChildren, oldHeaderFooterChildren);
}
int index = 0;
for (int i = 0; i < itemsCount; i++)
{
Object item = items[i];
CollectionViewGroup collectionViewGroup = item as CollectionViewGroup;
if (collectionViewGroup == null)
{
if ((i == 0) && (itemsIsAllItems))
{
GeneratorNodeHelper nodeHelper = new GeneratorNodeHelper(generatorNode, 0, 0);
nodeHelper.ReverseCalculateIndex();
index = nodeHelper.SourceDataIndex;
}
itemAutomationPeer = oldDataChildren[item] as DataGridItemAutomationPeer;
if (itemAutomationPeer == null)
{
if (itemsIsAllItems)
{
itemAutomationPeer = dataGridContextAutomationPeer.CreateItemAutomationPeerInternal(item, index + i);
}
else
{
itemAutomationPeer = dataGridContextAutomationPeer.CreateItemAutomationPeerInternal(item, -1);
}
}
else
{
if (itemsIsAllItems)
{
itemAutomationPeer.SetIndex(index + i);
}
else
{
itemAutomationPeer.SetIndex(-1);
}
}
// Force EventsSource to be updated
itemAutomationPeer.GetWrapperPeer();
if (m_dataChildren[item] == null)
{
Debug.Assert(itemAutomationPeer != null);
list.Add(itemAutomationPeer);
m_dataChildren[item] = itemAutomationPeer;
if (dataGridContextItemsPeer[item] == null)
{
dataGridContextItemsPeer[item] = itemAutomationPeer;
}
}
}
else
{
Group uiGroup =
customItemContainerGenerator.GetGroupFromCollectionViewGroup(this.Owner, collectionViewGroup);
if (uiGroup != null)
{
groupAutomationPeer = uiGroup.CreateAutomationPeer() as DataGridGroupAutomationPeer;
if (groupAutomationPeer != null)
{
list.Add(groupAutomationPeer);
}
}
}
}
if (footerNode != null)
{
DataGridGroupAutomationPeer.AddFooterPeer(dataGridContext, footerNode, list, m_headerFooterChildren, oldHeaderFooterChildren);
}
return(list);
}