public static IEnumerable <DependencyObject> GetVisualSiblingsAndSelf(this DependencyObject element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
DependencyObject parent = VisualTreeHelper.GetParent(element);
if (parent != null)
{
return(VisualTreeExtensions.GetVisualChildren(parent));
}
return(Enumerable.Empty <DependencyObject>());
}
private static IEnumerable <DependencyObject> GetVisualDescendantsAndSelfIterator(DependencyObject element)
{
Queue <DependencyObject> remaining = new Queue <DependencyObject>();
remaining.Enqueue(element);
while (remaining.Count > 0)
{
DependencyObject obj = remaining.Dequeue();
yield return(obj);
foreach (DependencyObject dependencyObject in VisualTreeExtensions.GetVisualChildren(obj))
{
remaining.Enqueue(dependencyObject);
}
}
}
public static Panel GetItemsHost(this ItemsControl control)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
DependencyObject reference = control.ItemContainerGenerator.ContainerFromIndex(0);
if (reference != null)
{
return(VisualTreeHelper.GetParent(reference) as Panel);
}
FrameworkElement parent = Enumerable.FirstOrDefault <DependencyObject>(VisualTreeExtensions.GetVisualChildren((DependencyObject)control)) as FrameworkElement;
if (parent != null)
{
ItemsPresenter itemsPresenter = Enumerable.FirstOrDefault <ItemsPresenter>(Enumerable.OfType <ItemsPresenter>((IEnumerable)VisualTreeExtensions.GetLogicalDescendents(parent)));
if (itemsPresenter != null && VisualTreeHelper.GetChildrenCount((DependencyObject)itemsPresenter) > 0)
{
return(VisualTreeHelper.GetChild((DependencyObject)itemsPresenter, 0) as Panel);
}
}
return((Panel)null);
}
internal static IEnumerable <FrameworkElement> GetLogicalChildren(this FrameworkElement parent)
{
Popup popup = parent as Popup;
if (popup != null)
{
FrameworkElement popupChild = popup.Child as FrameworkElement;
if (popupChild != null)
{
yield return(popupChild);
}
}
ItemsControl itemsControl = parent as ItemsControl;
if (itemsControl != null)
{
foreach (FrameworkElement frameworkElement in Enumerable.OfType <FrameworkElement>((IEnumerable)Enumerable.Select <int, DependencyObject>(Enumerable.Range(0, itemsControl.Items.Count), (Func <int, DependencyObject>)(index => itemsControl.ItemContainerGenerator.ContainerFromIndex(index)))))
{
yield return(frameworkElement);
}
}
Queue <FrameworkElement> queue = new Queue <FrameworkElement>(Enumerable.OfType <FrameworkElement>((IEnumerable)VisualTreeExtensions.GetVisualChildren((DependencyObject)parent)));
while (queue.Count > 0)
{
FrameworkElement element = queue.Dequeue();
if (element.Parent == parent || element is UserControl)
{
yield return(element);
}
else
{
foreach (FrameworkElement frameworkElement in Enumerable.OfType <FrameworkElement>((IEnumerable)VisualTreeExtensions.GetVisualChildren((DependencyObject)element)))
{
queue.Enqueue(frameworkElement);
}
}
}
}
