|
public static class VisualTreeHelper
{
public static T GetParent<T>(this Element element) where T : Element
{
if (element is T)
{
return element as T;
}
else
{
if (element.Parent != null)
{
return element.Parent.GetParent<T>();
}
return default(T);
}
}
public static IEnumerable<T> GetChildren<T>(this Element element) where T : Element
{
var properties = element.GetType().GetRuntimeProperties();
// try to parse the Content property
var contentProperty = properties.FirstOrDefault(w => w.Name == "Content");
if (contentProperty != null)
{
var content = contentProperty.GetValue(element) as Element;
if (content != null)
{
if (content is T)
{
yield return content as T;
}
foreach (var child in content.GetChildren<T>())
{
yield return child;
}
}
}
else
{
// try to parse the Children property
var childrenProperty = properties.FirstOrDefault(w => w.Name == "Children");
if (childrenProperty != null)
{
// loop through children
IEnumerable children = childrenProperty.GetValue(element) as IEnumerable;
foreach (var child in children)
{
var childVisualElement = child as Element;
if (childVisualElement != null)
{
// return match
if (childVisualElement is T)
{
yield return childVisualElement as T;
}
// return recursive results of children
foreach (var childVisual in childVisualElement.GetChildren<T>())
{
yield return childVisual;
}
}
}
}
}
}
}
|
