private DataGridCellItemAutomationPeer GetOrCreateCellItemPeer(DataGridColumn column, bool addParentInfo)
{
DataGridCellItemAutomationPeer dataGridCellItemAutomationPeer = this.CellItemPeers[column];
if (dataGridCellItemAutomationPeer == null)
{
dataGridCellItemAutomationPeer = this.GetPeerFromWeakRefStorage(column);
if (dataGridCellItemAutomationPeer != null && !addParentInfo)
{
dataGridCellItemAutomationPeer.AncestorsInvalid = false;
dataGridCellItemAutomationPeer.ChildrenValid = false;
}
}
if (dataGridCellItemAutomationPeer == null)
{
dataGridCellItemAutomationPeer = new DataGridCellItemAutomationPeer(base.Item, column);
if (addParentInfo && dataGridCellItemAutomationPeer != null)
{
dataGridCellItemAutomationPeer.TrySetParentInfo(this);
}
}
AutomationPeer owningCellPeer = dataGridCellItemAutomationPeer.OwningCellPeer;
if (owningCellPeer != null)
{
owningCellPeer.EventsSource = dataGridCellItemAutomationPeer;
}
return(dataGridCellItemAutomationPeer);
}
/// <summary>
/// It returns the CellItemAutomationPeer if it exist corresponding to the item otherwise it creates
/// one and adds the Handle and parent info by calling AddParentInfo.
/// </summary>
/// <param name="column"></param>
/// <param name="addParentInfo">only required when creating peers for virtualized cells</param>
/// <returns></returns>
private DataGridCellItemAutomationPeer GetOrCreateCellItemPeer(DataGridColumn column, bool addParentInfo)
{
// try to reuse old peer if it exists either in Current AT or in WeakRefStorage of Peers being sent to Client
DataGridCellItemAutomationPeer peer = CellItemPeers[column];
if (peer == null)
{
peer = GetPeerFromWeakRefStorage(column);
if (peer != null && !addParentInfo)
{
// As cached peer is getting used it must be invalidated. addParentInfo check ensures that call is coming from GetChildrenCore
peer.AncestorsInvalid = false;
peer.ChildrenValid = false;
}
}
if (peer == null)
{
peer = new DataGridCellItemAutomationPeer(Item, column);
if (addParentInfo && peer != null)
{
peer.TrySetParentInfo(this);
}
}
//perform hookup so the events sourced from wrapper peer are fired as if from the data item
AutomationPeer wrapperPeer = peer.OwningCellPeer;
if (wrapperPeer != null)
{
wrapperPeer.EventsSource = peer;
}
return(peer);
}
private DataGridCellItemAutomationPeer GetOrCreateCellItemPeer(DataGridColumn column, bool addParentInfo)
{
// try to reuse old peer if it exists either in Current AT or in WeakRefStorage of Peers being sent to Client
DataGridCellItemAutomationPeer peer = CellItemPeers[column];
if (peer == null)
{
peer = GetPeerFromWeakRefStorage(column);
if (peer != null && !addParentInfo)
{
// As cached peer is getting used it must be invalidated. addParentInfo check ensures that call is coming from GetChildrenCore
peer.AncestorsInvalid = false;
peer.ChildrenValid = false;
}
}
if (peer == null)
{
peer = new DataGridCellItemAutomationPeer(_item, column);
if (addParentInfo && peer != null)
{
peer.TrySetParentInfo(this);
}
}
//perform hookup so the events sourced from wrapper peer are fired as if from the data item
AutomationPeer wrapperPeer = peer.OwningCellPeer;
if (wrapperPeer != null)
{
wrapperPeer.EventsSource = peer;
}
return peer;
}