internal static void AddFooterPeer(
DataGridContext dataGridContext,
HeadersFootersGeneratorNode node,
List<AutomationPeer> list,
Hashtable children,
Hashtable oldChildren )
{
int headersCount = node.ItemCount;
for( int i = 0; i < headersCount; i++ )
{
// We use GetAt since it does not return the same thing as .Items.
// We need to get a GroupHeaderFooterItem.
object item = node.GetAt( i );
if( item != null )
{
HeaderFooterItemAutomationPeer automationPeer =
oldChildren[ item ] as HeaderFooterItemAutomationPeer;
if( automationPeer == null )
{
automationPeer = new HeaderFooterItemAutomationPeer( dataGridContext, item );
}
Debug.Assert( automationPeer != null );
// we set ExtraInfo even if the header was already created since the position can change.
automationPeer.SetExtraInfo( HeaderFooterItemAutomationPeer.HeaderFooterType.Footer, i );
// Force EventsSource to be updated
automationPeer.GetWrapperPeer();
list.Add( automationPeer );
children[ item ] = automationPeer;
}
}
}
private void AddChildrenFooters(
HeadersFootersGeneratorNode footerNode,
Hashtable oldHeaderFooterChildren,
List<AutomationPeer> list )
{
if( m_parentDataGridContext == null )
{
// Add fixed header to the children list
Panel fixedFooterPanel = m_dataGridControl.FixedFootersHostPanel;
if( fixedFooterPanel != null )
{
int index = 0;
foreach( DependencyObject headerFooter in fixedFooterPanel.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.FixedFooter, index );
m_headerFooterChildren[ headerFooter ] = automationPeer;
list.Add( automationPeer );
}
index++;
}
}
}
if( footerNode != null )
{
DataGridGroupAutomationPeer.AddFooterPeer( m_dataGridContext, footerNode, list, m_headerFooterChildren, oldHeaderFooterChildren );
}
}
private AutomationPeer GetPeerForChildrenIndex(int index)
{
int fixedHeadersCount = 0;
Panel fixedHeadersPanel = null;
int fixedFootersCount = 0;
Panel fixedFootersPanel = null;
if (m_parentDataGridContext == null)
{
fixedHeadersPanel = m_dataGridControl.FixedHeadersHostPanel;
fixedHeadersCount = (fixedHeadersPanel != null) ? fixedHeadersPanel.Children.Count : 0;
fixedFootersPanel = m_dataGridControl.FixedFootersHostPanel;
fixedFootersCount = (fixedFootersPanel != null) ? fixedFootersPanel.Children.Count : 0;
}
if (index < fixedHeadersCount)
{
UIElement element = fixedHeadersPanel.Children[index];
AutomationPeer automationPeer = m_headerFooterChildren[element] as AutomationPeer;
Debug.Assert(automationPeer != null);
if (automationPeer == null)
{
return(null);
}
return(automationPeer);
}
else
{
index -= fixedHeadersCount;
HeadersFootersGeneratorNode headerNode = m_dataGridContext.CustomItemContainerGenerator.Header;
int headersCount = (headerNode == null) ? 0 : headerNode.ItemCount;
if (index < headersCount)
{
object item = headerNode.GetAt(index);
AutomationPeer automationPeer = m_headerFooterChildren[item] as AutomationPeer;
Debug.Assert(automationPeer != null);
return(automationPeer);
}
else
{
index -= headersCount;
CollectionView items = m_dataGridContext.Items;
int itemsCount = (items == null) ? 0 : items.Count;
if (index < itemsCount)
{
return(this.FindOrCreateItemAutomationPeer(items.GetItemAt(index), index));
}
else
{
index -= itemsCount;
HeadersFootersGeneratorNode footerNode = m_dataGridContext.CustomItemContainerGenerator.Footer;
int footersCount = (footerNode == null) ? 0 : footerNode.ItemCount;
if (index < footersCount)
{
object item = footerNode.GetAt(index);
AutomationPeer automationPeer = m_headerFooterChildren[item] as AutomationPeer;
Debug.Assert(automationPeer != null);
return(automationPeer);
}
else
{
index -= footersCount;
if (index < fixedFootersCount)
{
UIElement element = fixedFootersPanel.Children[index];
AutomationPeer automationPeer = m_headerFooterChildren[element] as AutomationPeer;
Debug.Assert(automationPeer != null);
return(automationPeer);
}
}
}
}
}
return(null);
}
protected override List <AutomationPeer> GetChildrenCore()
{
if (m_dataGridContext == null)
{
return(null);
}
if (m_oldColumnCount == -1)
{
m_oldColumnCount = m_dataGridContext.VisibleColumns.Count;
m_dataGridContext.Columns.VisibleColumnsUpdated += new EventHandler(Columns_VisibleColumnsUpdated);
}
CustomItemContainerGenerator itemGenerator = m_dataGridContext.CustomItemContainerGenerator;
IEnumerable items;
int itemsCount;
bool itemsIsAllItems = false;
// The way Microsoft check if we are called by an automation that support Virtualization.
if ((ItemContainerPatternIdentifiers.Pattern != null) && (m_dataGridControl.ItemsHost is DataGridItemsHost))
{
List <object> realizedItems = itemGenerator.GetRealizedDataItems();
items = realizedItems;
itemsCount = realizedItems.Count;
}
else
{
CollectionView viewItems = m_dataGridContext.Items;
items = viewItems;
itemsCount = viewItems.Count;
itemsIsAllItems = true;
}
Hashtable oldDataChildren = m_dataChildren;
Hashtable oldHeaderFooterChildren = m_headerFooterChildren;
// Get header count
HeadersFootersGeneratorNode headerNode = itemGenerator.Header;
int headersCount = (headerNode == null) ? 0 : headerNode.ItemCount;
// Get footer count
HeadersFootersGeneratorNode footerNode = itemGenerator.Footer;
int footersCount = (footerNode == null) ? 0 : footerNode.ItemCount;
int childrenCount = headersCount + footersCount;
if (m_parentDataGridContext == null)
{
// Add the fixed header / footer count to the children
Panel fixedPanel = m_dataGridControl.FixedHeadersHostPanel;
if (fixedPanel != null)
{
childrenCount += fixedPanel.Children.Count;
}
fixedPanel = m_dataGridControl.FixedFootersHostPanel;
if (fixedPanel != null)
{
childrenCount += fixedPanel.Children.Count;
}
}
ReadOnlyObservableCollection <object> groups = m_dataGridContext.Items.Groups;
if (groups != null)
{
// Add the group count to the children
childrenCount += groups.Count;
}
else
{
childrenCount += itemsCount;
}
m_dataChildren = new Hashtable(itemsCount);
m_headerFooterChildren = new Hashtable(headersCount + footersCount);
if (childrenCount == 0)
{
return(null);
}
List <AutomationPeer> list = new List <AutomationPeer>(childrenCount);
this.AddChildrenHeaders(headerNode, oldHeaderFooterChildren, list);
if (groups != null)
{
CustomItemContainerGenerator customItemContainerGenerator = m_dataGridContext.CustomItemContainerGenerator;
DataGridGroupAutomationPeer peer;
itemsCount = groups.Count;
for (int i = 0; i < itemsCount; i++)
{
CollectionViewGroup collectionViewGroup = groups[i] as CollectionViewGroup;
if (collectionViewGroup != null)
{
Group uiGroup =
customItemContainerGenerator.GetGroupFromCollectionViewGroup(null, collectionViewGroup);
if (uiGroup != null)
{
peer = uiGroup.CreateAutomationPeer() as DataGridGroupAutomationPeer;
if (peer != null)
{
list.Add(peer);
}
}
}
}
}
else
{
int index = 0;
foreach (object item in ( IEnumerable )items)
{
DataGridItemAutomationPeer itemAutomationPeer =
oldDataChildren[item] as DataGridItemAutomationPeer;
if (itemAutomationPeer == null)
{
if (itemsIsAllItems)
{
itemAutomationPeer = this.CreateItemAutomationPeer(item, index);
index++;
}
else
{
itemAutomationPeer = this.CreateItemAutomationPeer(item, -1);
}
}
else
{
if (itemsIsAllItems)
{
itemAutomationPeer.SetIndex(index);
index++;
}
else
{
itemAutomationPeer.SetIndex(-1);
}
}
// Force EventsSource to be updated
itemAutomationPeer.GetWrapperPeer();
if (m_dataChildren[item] == null)
{
list.Add(itemAutomationPeer);
m_dataChildren[item] = itemAutomationPeer;
}
}
}
this.AddChildrenFooters(footerNode, oldHeaderFooterChildren, list);
return(list);
}
public IRawElementProviderSimple FindItemByProperty(IRawElementProviderSimple startAfter, int propertyId, object value)
{
if ((propertyId != 0) && (!DataGridContextAutomationPeer.IsPropertySupportedForFindItem(propertyId)))
{
throw new ArgumentException("Property not supported");
}
if (m_dataGridContext == null)
{
return(null);
}
CollectionView items = m_dataGridContext.Items;
int itemsCount = (items == null) ? 0 : items.Count;
DataGridItemAutomationPeer startAfterItemPeer = null;
HeaderFooterItemAutomationPeer startAfterHeaderFooterPeer = null;
if (startAfter != null)
{
AutomationPeer startAfterPeer = this.PeerFromProvider(startAfter);
if (startAfterPeer == null)
{
return(null);
}
startAfterItemPeer = startAfterPeer as DataGridItemAutomationPeer;
startAfterHeaderFooterPeer = startAfterPeer as HeaderFooterItemAutomationPeer;
}
int startIndex = 0;
// Get header count
HeadersFootersGeneratorNode headerNode = m_dataGridContext.CustomItemContainerGenerator.Header;
int headersCount = (headerNode == null) ? 0 : headerNode.ItemCount;
int fixedHeadersCount = 0;
Panel fixedHeadersPanel = null;
// Get footer count
HeadersFootersGeneratorNode footerNode = m_dataGridContext.CustomItemContainerGenerator.Footer;
int footersCount = (footerNode == null) ? 0 : footerNode.ItemCount;
int fixedFootersCount = 0;
Panel fixedFootersPanel = null;
if (m_parentDataGridContext == null)
{
// Add the fixed header / footer count to the children
fixedHeadersPanel = m_dataGridControl.FixedHeadersHostPanel;
fixedHeadersCount = (fixedHeadersPanel != null) ? fixedHeadersPanel.Children.Count : 0;
fixedFootersPanel = m_dataGridControl.FixedFootersHostPanel;
fixedFootersCount = (fixedFootersPanel != null) ? fixedFootersPanel.Children.Count : 0;
}
int childrenCount = headersCount + fixedHeadersCount + footersCount + fixedFootersCount + itemsCount;
if (startAfterItemPeer != null)
{
startIndex = fixedHeadersCount + headersCount + startAfterItemPeer.Index + 1;
}
else if (startAfterHeaderFooterPeer != null)
{
startIndex = startAfterHeaderFooterPeer.Index + 1;
switch (startAfterHeaderFooterPeer.Type)
{
case HeaderFooterItemAutomationPeer.HeaderFooterType.FixedHeader:
{
break;
}
case HeaderFooterItemAutomationPeer.HeaderFooterType.Header:
{
startIndex += fixedHeadersCount;
break;
}
case HeaderFooterItemAutomationPeer.HeaderFooterType.Footer:
{
startIndex += fixedHeadersCount + headersCount + itemsCount;
break;
}
case HeaderFooterItemAutomationPeer.HeaderFooterType.FixedFooter:
{
startIndex += fixedHeadersCount + headersCount + footersCount + itemsCount;
break;
}
}
}
// Force a children refresh and update our inner caching
this.GetChildren();
if (propertyId == 0)
{
AutomationPeer peer = this.GetPeerForChildrenIndex(startIndex);
if (peer == null)
{
return(null);
}
return(this.ProviderFromPeer(peer));
}
object propertyValue = null;
// Search in footer/Fixed footer first
if (footersCount + fixedFootersCount > 0)
{
int footerStartIndex = System.Math.Max(startIndex, childrenCount - footersCount - fixedFootersCount);
for (int i = startIndex; i < childrenCount; i++)
{
AutomationPeer peer = this.GetPeerForChildrenIndex(i);
if (peer != null)
{
try
{
propertyValue = peer.GetPropertyValue(propertyId);
}
catch (Exception exception)
{
if (exception is ElementNotAvailableException)
{
continue;
}
}
if (object.Equals(value, propertyValue))
{
return(this.ProviderFromPeer(peer));
}
}
}
childrenCount -= footersCount + fixedFootersCount;
}
// Search in the header/Fixed header and data item
for (int i = startIndex; i < childrenCount; i++)
{
AutomationPeer peer = this.GetPeerForChildrenIndex(i);
if (peer != null)
{
try
{
propertyValue = peer.GetPropertyValue(propertyId);
}
catch (Exception exception)
{
if (exception is ElementNotAvailableException)
{
continue;
}
}
if (object.Equals(value, propertyValue))
{
return(this.ProviderFromPeer(peer));
}
}
}
return(null);
}
