internal static void GetTurnstileElements(UIElement parent, ItemTurnstileXMode xmode, ref List <UIElement> elements)
{
int count = VisualTreeHelper.GetChildrenCount(parent);
if (count > 0)
{
for (int i = 0; i < count; i++)
{
UIElement child = (UIElement)VisualTreeHelper.GetChild(parent, i);
if (ItemTurnstileTransition.GetIsTurnstileItem(child) && TakesPartInContinuum(child, xmode) == false)
{
elements.Add(child);
}
GetTurnstileElements(child, xmode, ref elements);
}
}
}
private static bool TakesPartInContinuum(UIElement child, ItemTurnstileXMode xMode)
{
var mode = ItemTurnstileTransition.GetItemContinuumMode(child);
return
((xMode == ItemTurnstileXMode.BackwardIn &&
(mode == ContinuumModeEnum.BackwardIn || mode == ContinuumModeEnum.ForwardOutBackwardIn)) ||
(xMode == ItemTurnstileXMode.BackwardOut &&
(mode == ContinuumModeEnum.BackwardOut || mode == ContinuumModeEnum.ForwardInBackwardOut)) ||
(xMode == ItemTurnstileXMode.ForwardIn &&
(mode == ContinuumModeEnum.ForwardIn || mode == ContinuumModeEnum.ForwardInBackwardOut)) ||
(xMode == ItemTurnstileXMode.ForwardOut &&
(mode == ContinuumModeEnum.ForwardOut || mode == ContinuumModeEnum.ForwardOutBackwardIn)));
}