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);
}
internal void UpdateRowPeerEventsSource(DataGridRow row)
{
DataGridRowAutomationPeer peer = FromElement(row) as DataGridRowAutomationPeer;
if (peer != null && row.DataContext != null && _itemPeers.ContainsKey(row.DataContext))
{
peer.EventsSource = _itemPeers[row.DataContext];
}
}
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);
}
}
}
}
}