private void UpdateVisualState(bool useTransitions)
{
if (useTransitions)
{
// If the Picker is scrolling stop it from moving, this is both
// consistant with Metro and allows for attaching the animations
// to the correct, in view items.
ScrollViewer scrollViewer = Picker.GetVisualChildren().OfType <ScrollViewer>().FirstOrDefault();
if (scrollViewer != null)
{
scrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset);
}
if (!IsOpen)
{
SetupListItems(0);
}
Storyboard mainBoard = new Storyboard();
Storyboard headerBoard = AnimationForElement(HeaderTitle, 0);
mainBoard.Children.Add(headerBoard);
for (int i = 0; i < _itemsToAnimate.Count; i++)
{
FrameworkElement element = (FrameworkElement)_itemsToAnimate[i].Target;
Storyboard board = AnimationForElement(element, i + 1);
mainBoard.Children.Add(board);
}
if (!IsOpen)
{
mainBoard.Completed += OnClosedStoryboardCompleted;
}
mainBoard.Begin();
}
else if (!IsOpen)
{
OnClosedStoryboardCompleted(null, null);
}
}
