public void CreateHUDItems(ICollection <IHUDItem> container, AutomationElement rootElement)
{
var element = rootElement;
_taskList.Enqueue(rootElement);
ControlType ct;
System.Windows.Rect rect;
AutomationElement.AutomationElementInformation aeInfo;
IEnumerable <AutomationElement> children;
while (_taskList.Count > 0)
{
element = _taskList.Dequeue();
children = element.FindAll(TreeScope.Children, Condition)?.Cast <AutomationElement>();
if (children == null)
{
continue;
}
foreach (AutomationElement elementNode in children)
{
// call .Current once, because of high cost
aeInfo = elementNode.Current;
ct = aeInfo.ControlType;
if (!IgnoreElements.Contains(ct))
{
rect = aeInfo.BoundingRectangle;
if (rect.Width != 0 && rect.Height != 0)
{
rect.X -= DesktopBounds.Left;
rect.Y -= DesktopBounds.Top;
AddHUDItem(container, rect);
}
}
if (CollectionElements.Contains(ct))
{
CreateHUDItemsForCollection(container, elementNode);
continue;
}
if (!EndElements.Contains(ct))
{
_taskList.Enqueue(elementNode);
}
}
}
}
// for List (except Tree)
private void CreateHUDItemsForCollection(ICollection <IHUDItem> container, AutomationElement collection)
{
var bounds = collection.Current.BoundingRectangle;
var treeWalker = new TreeWalker(Condition);
var item = treeWalker.GetFirstChild(collection);
var beginOnScreen = false;
while (item != null)
{
var aeInfo = item.Current;
var rect = aeInfo.BoundingRectangle;
if (!IgnoreElements.Contains(aeInfo.ControlType) && bounds.Contains(rect))
{
if (!beginOnScreen && ItemElements.Contains(aeInfo.ControlType))
{
beginOnScreen = true;
}
var ct = aeInfo.ControlType;
rect.X -= DesktopBounds.Left;
rect.Y -= DesktopBounds.Top;
AddHUDItem(container, rect);
if (!EndElements.Contains(ct))
{
_taskList.Enqueue(item);
}
}
else if (beginOnScreen)
{
break;
}
item = treeWalker.GetNextSibling(item);
}
}