private void Frame_Navigated(object sender, Windows.UI.Xaml.Navigation.NavigationEventArgs e)
{
var navigatedPage = (sender as Frame).Content as Page;
if (navigatedPage == null)
{
return;
}
void loadedHandler(object s, RoutedEventArgs args)
{
var page = s as Page;
page.Loaded -= loadedHandler;
object parameter;
if (_nextParameter != null)
{
parameter = _nextParameter;
}
else if (e.NavigationMode == Windows.UI.Xaml.Navigation.NavigationMode.Back)
{
var sourcePage = (sender as Frame).ForwardStack.LastOrDefault();
parameter = sourcePage?.Parameter;
}
else
{
parameter = e.Parameter;
}
var cas = ConnectedAnimationService.GetForCurrentView();
var connectedAnimationsProps = Connected.GetPageConnectedAnimationProperties(page);
var coordinatedAnimationElements = Connected.GetPageCoordinatedAnimationElements(page);
foreach (var props in connectedAnimationsProps.Values)
{
var connectedAnimation = cas.GetAnimation(props.Key);
var animationHandled = false;
if (connectedAnimation != null)
{
if (props.IsListAnimation && parameter != null && ApiInformationHelper.IsCreatorsUpdateOrAbove)
{
foreach (var listAnimProperty in props.ListAnimProperties)
{
if (listAnimProperty.ListViewBase.ItemsSource is IEnumerable <object> items && items.Contains(parameter))
{
listAnimProperty.ListViewBase.ScrollIntoView(parameter);
// give time to the UI thread to scroll the list
var t = listAnimProperty.ListViewBase.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async() =>
{
try
{
var success = await listAnimProperty.ListViewBase.TryStartConnectedAnimationAsync(connectedAnimation, parameter, listAnimProperty.ElementName);
}
catch (Exception)
{
connectedAnimation.Cancel();
}
});
animationHandled = true;
}
}
}
else if (!props.IsListAnimation)
{
if (ApiInformationHelper.IsCreatorsUpdateOrAbove && coordinatedAnimationElements.TryGetValue(props.Element, out var coordinatedElements))
{
connectedAnimation.TryStart(props.Element, coordinatedElements);
}
else
{
connectedAnimation.TryStart(props.Element);
}
animationHandled = true;
}
}
if (_previousPageConnectedAnimationProps.ContainsKey(props.Key) && animationHandled)
{
_previousPageConnectedAnimationProps.Remove(props.Key);
}
}
// if there are animations that were prepared on previous page but no elements on this page have the same key - cancel
foreach (var previousProps in _previousPageConnectedAnimationProps)
{
var connectedAnimation = cas.GetAnimation(previousProps.Key);
connectedAnimation?.Cancel();
}
_previousPageConnectedAnimationProps.Clear();
_nextParameter = null;
}
navigatedPage.Loaded += loadedHandler;
}
