internal DataGridItemAutomationPeer GetOrCreateItemPeer(object item)
{
DataGridItemAutomationPeer peer = null;
if (item != null)
{
if (_itemPeers.ContainsKey(item))
{
peer = _itemPeers[item];
}
else
{
peer = new DataGridItemAutomationPeer(item, this.OwningDataGrid);
_itemPeers.Add(item, peer);
}
DataGridRowAutomationPeer rowPeer = peer.OwningRowPeer;
if (rowPeer != null)
{
rowPeer.EventsSource = peer;
}
}
return(peer);
}
IRawElementProviderSimple[] ISelectionProvider.GetSelection()
{
EnsureEnabled();
if (this.OwningDataGrid != null &&
this.OwningDataGridPeer != null &&
this.OwningDataGrid.SelectedItems != null &&
_group.GroupItems.Count /*ItemCount*/ > 0)
{
DataGridRowGroupInfo groupInfo = this.OwningDataGrid.RowGroupInfoFromCollectionViewGroup(_group);
if (groupInfo != null)
{
// See which of the selected items are contained within this group
List <IRawElementProviderSimple> selectedProviders = new List <IRawElementProviderSimple>();
int startRowIndex = groupInfo.Slot - this.OwningDataGrid.RowGroupHeadersTable.GetIndexCount(0, groupInfo.Slot) + 1;
foreach (object item in this.OwningDataGrid.GetSelectionInclusive(startRowIndex, startRowIndex + _group.GroupItems.Count /*ItemCount*/ - 1))
{
DataGridItemAutomationPeer peer = this.OwningDataGridPeer.GetOrCreateItemPeer(item);
if (peer != null)
{
selectedProviders.Add(ProviderFromPeer(peer));
}
}
return(selectedProviders.ToArray());
}
}
return(null);
}
internal void RaiseAutomationSelectionEvents(SelectionChangedEventArgs e)
{
// If the result of an AddToSelection or RemoveFromSelection is a single selected item,
// then all we raise is the ElementSelectedEvent for single item
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementSelected) &&
this.OwningDataGrid.SelectedItems.Count == 1)
{
if (this.OwningDataGrid.SelectedItem != null && _itemPeers.ContainsKey(this.OwningDataGrid.SelectedItem))
{
DataGridItemAutomationPeer peer = _itemPeers[this.OwningDataGrid.SelectedItem];
#if DEBUG_AUTOMATION
Debug.WriteLine("DataGridItemAutomationPeer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementSelected)");
#endif
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementSelected);
}
}
else
{
int i;
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementAddedToSelection))
{
for (i = 0; i < e.AddedItems.Count; i++)
{
if (e.AddedItems[i] != null && _itemPeers.ContainsKey(e.AddedItems[i]))
{
DataGridItemAutomationPeer peer = _itemPeers[e.AddedItems[i]];
#if DEBUG_AUTOMATION
Debug.WriteLine("DataGridItemAutomationPeer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementAddedToSelection)");
#endif
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementAddedToSelection);
}
}
}
if (AutomationPeer.ListenerExists(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection))
{
for (i = 0; i < e.RemovedItems.Count; i++)
{
if (e.RemovedItems[i] != null && _itemPeers.ContainsKey(e.RemovedItems[i]))
{
DataGridItemAutomationPeer peer = _itemPeers[e.RemovedItems[i]];
#if DEBUG_AUTOMATION
Debug.WriteLine("DataGridItemAutomationPeer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection)");
#endif
peer.RaiseAutomationEvent(AutomationEvents.SelectionItemPatternOnElementRemovedFromSelection);
}
}
}
}
}
IRawElementProviderSimple[] ISelectionProvider.GetSelection()
{
if (this.OwningDataGrid != null &&
this.OwningDataGrid.SelectedItems != null)
{
List <IRawElementProviderSimple> selectedProviders = new List <IRawElementProviderSimple>();
foreach (object item in this.OwningDataGrid.SelectedItems)
{
DataGridItemAutomationPeer peer = GetOrCreateItemPeer(item);
if (peer != null)
{
selectedProviders.Add(ProviderFromPeer(peer));
}
}
return(selectedProviders.ToArray());
}
return(null);
}
internal void PopulateItemPeers()
{
Dictionary <object, DataGridItemAutomationPeer> oldChildren = new Dictionary <object, DataGridItemAutomationPeer>(_itemPeers);
_itemPeers.Clear();
if (this.OwningDataGrid.ItemsSource != null)
{
foreach (object item in this.OwningDataGrid.ItemsSource)
{
if (item != null)
{
DataGridItemAutomationPeer peer = null;
if (oldChildren.ContainsKey(item))
{
peer = oldChildren[item] as DataGridItemAutomationPeer;
}
else
{
peer = new DataGridItemAutomationPeer(item, this.OwningDataGrid);
}
if (peer != null)
{
DataGridRowAutomationPeer rowPeer = peer.OwningRowPeer;
if (rowPeer != null)
{
rowPeer.EventsSource = peer;
}
}
// This guards against the addition of duplicate items
if (!_itemPeers.ContainsKey(item))
{
_itemPeers.Add(item, peer);
}
}
}
}
}
internal void RaiseAutomationInvokeEvents(DataGridEditingUnit editingUnit, DataGridColumn column, DataGridRow row)
{
switch (editingUnit)
{
case DataGridEditingUnit.Cell:
{
DataGridCell cell = row.Cells[column.Index];
AutomationPeer peer = FromElement(cell);
if (peer != null)
{
peer.InvalidatePeer();
}
else
{
peer = CreatePeerForElement(cell);
}
if (peer != null)
{
#if DEBUG_AUTOMATION
Debug.WriteLine(peer.ToString() + ".RaiseAutomationEvent(AutomationEvents.InvokePatternOnInvoked)");
#endif
peer.RaiseAutomationEvent(AutomationEvents.InvokePatternOnInvoked);
}
break;
}
case DataGridEditingUnit.Row:
{
DataGridItemAutomationPeer peer = GetOrCreateItemPeer(row.DataContext);
#if DEBUG_AUTOMATION
Debug.WriteLine("DataGridItemAutomationPeer.RaiseAutomationEvent(AutomationEvents.InvokePatternOnInvoked)");
#endif
peer.RaiseAutomationEvent(AutomationEvents.InvokePatternOnInvoked);
break;
}
}
}