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;
}
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);
}
