public static IEnumerable <T> CollectElements <T>(this Xamarin.Forms.Element element) where T : Xamarin.Forms.Element
{
if (element == null)
{
yield break;
}
foreach (var child in element.GetChildrenRecursive())
{
if (typeof(T).IsAssignableFrom(child.GetType()))
{
yield return(child as T);
}
}
/*var typ = element.GetType();
*
* if (typeof(Cell).IsAssignableFrom(typeof(T)))
* callHandler(element as T);
*
* if (typeof(Cell).IsAssignableFrom(typ)) {
* var cell = element as Cell;
* if (typeof(ViewCell).IsAssignableFrom(typ))
* CollectElements<T>((cell as ViewCell).View, callHandler);
* } else if (typeof(ContentPage).IsAssignableFrom(typ)) {
* var page = element as ContentPage;
* CollectElements<T>(page.Content, callHandler);
* } else if (typeof(Layout<View>).IsAssignableFrom(typ)) {
* var layout = element as Layout<View>;
* foreach (var child in layout.Children)
* CollectElements<T>(child, callHandler);
* } else if (typeof(Layout).IsAssignableFrom(typ)) {
* var layout = element as Layout;
* foreach (var child in layout.Children)
* CollectElements<T>(child, callHandler);
* } else if (typeof(ITemplatedItemsView<Cell>).IsAssignableFrom(typ)) {
* var tiv = element as ITemplatedItemsView<Cell>;
* foreach (var cell in tiv.TemplatedItems)
* CollectElements<T>(cell, callHandler);
* }*/
}
