private async void FinishLoad(Task <IEnumerable <Tuple <string, string> > > imagesTask)
{
_finishedImages = new List <Tuple <string, string> >(imagesTask.Result);
bool hasGifs = false;
for (int i = 0; i < _finishedImages.Count; i++)
{
var renderer = GifRenderer.CreateGifRenderer(await DownloadImageFromWebsiteAsync(_finishedImages[i].Item2));
if (renderer != null)
{
_imageSources.Add(i, renderer);
hasGifs = true;
}
}
if (hasGifs)
{
Messenger.Default.Register <PageChangeMessage>(this, OnPageChange);
}
IsLoading = false;
RaisePropertyChanged("ImageSource");
RaisePropertyChanged("IsLoading");
RaisePropertyChanged("IsAlbum");
RaisePropertyChanged("AlbumSize");
CurrentPosition = 0;
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A dictionary of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
protected override async void LoadState(Object navigationParameter, Dictionary <String, Object> pageState)
{
var pictureData = navigationParameter as IEnumerable <Tuple <string, string> >;
if (pictureData == null && pageState != null && pageState.ContainsKey("NavagationData"))
{
_navData = pictureData = pageState["NavagationData"] as IEnumerable <Tuple <string, string> >;
}
if (pictureData != null)
{
_navData = pictureData;
var pictureTasks = pictureData.Select(async(tpl) =>
{
var renderer = GifRenderer.CreateGifRenderer(await DownloadImageFromWebsiteAsync(tpl.Item2));
if (renderer != null)
{
renderer.Visible = true;
return(new LinkedPictureViewModel.LinkedPicture {
Title = tpl.Item1, ImageSource = renderer
});
}
else
{
return new LinkedPictureViewModel.LinkedPicture {
Title = tpl.Item1, ImageSource = tpl.Item2
}
};
})
.ToArray();
_pictureViewModel = new LinkedPictureViewModel
{
Pictures = await Task.WhenAll(pictureTasks)
};
}
DataContext = _pictureViewModel;
}