private static void IterateVisualChildren(DependencyObject parent, HwndContentControlAutomationPeer.IteratorCallback callback)
{
if (parent == null)
{
return;
}
int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
for (int childIndex = 0; childIndex < childrenCount; ++childIndex)
{
DependencyObject child = VisualTreeHelper.GetChild(parent, childIndex);
UIElement element = child as UIElement;
UIElement3D uiElement3D = child as UIElement3D;
AutomationPeer peerForElement1;
if (element != null && (peerForElement1 = UIElementAutomationPeer.CreatePeerForElement(element)) != null)
{
callback(peerForElement1);
}
else
{
AutomationPeer peerForElement2;
if (uiElement3D != null && (peerForElement2 = UIElement3DAutomationPeer.CreatePeerForElement((UIElement3D)child)) != null)
{
callback(peerForElement2);
}
else
{
HwndContentControlAutomationPeer.IterateVisualChildren(child, callback);
}
}
}
}
protected override List <AutomationPeer> GetChildrenCore()
{
List <AutomationPeer> children = (List <AutomationPeer>)null;
HwndContentControlAutomationPeer.IterateVisualChildren((DependencyObject)this.VisualSubtree, (HwndContentControlAutomationPeer.IteratorCallback)(peer =>
{
if (children == null)
{
children = new List <AutomationPeer>();
}
children.Add(peer);
}));
return(children);
}