private async Task RestoreState(IDictionary <string, object> state)
{
string imagesJson = (string)state["images"];
string type = (string)state["type"];
int index = state["index"] is int?(int)state["index"] : int.Parse((string)state["index"]);
IEnumerable <IGalleryItem> collection = null;
if (type == typeof(IncrementalGallery).Name)
{
collection = IncrementalGallery.fromJson(imagesJson);
}
if (type == typeof(IncrementalSubredditGallery).Name)
{
collection = (IEnumerable <IGalleryItem>)IncrementalSubredditGallery.FromJson(imagesJson);
}
if (collection != null && collection is ISupportIncrementalLoading)
{
var im = (ISupportIncrementalLoading)collection;
while (collection.Count() < index + 1)
{
await im.LoadMoreItemsAsync(60);
}
}
Images = collection;
FlipViewIndex = index;
state.Clear();
}
private async Task RestoreState(IDictionary <string, object> state)
{
if (state["subredditUrl"] == null)
{
Sub = JsonConvert.DeserializeObject <SubredditItem>((string)state["sub"]);
Images = IncrementalSubredditGallery.FromJson((string)state["images"]);
state.Clear();
}
else
{
string subUrl = (string)state["subredditUrl"];
var sub = await Initializer.Reddits.GetSubreddit(subUrl);
Sub = new SubredditItem(sub);
Images = new IncrementalSubredditGallery(subUrl, Enums.Sort.Time);
}
}
public override async Task OnNavigatedToAsync(object parameter, NavigationMode mode, IDictionary <string, object> state)
{
if (state.Any())
{
// restore state
state.Clear();
}
else
{
if (mode == NavigationMode.Back)
{
ImageSelectedIndex = galleryMetaInfo?.SelectedIndex ?? 0;
}
else
{
var sub = BootStrapper.Current.SessionState[(string)parameter] as SubredditItem;
Images = new IncrementalSubredditGallery(sub.Url);
}
}
await Task.CompletedTask;
}