protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (this.State != null && this.State.ContainsKey("PictureViewModelData"))
{
_pictureData = this.State["PictureViewModelData"] as IEnumerable <Tuple <string, string> >;
if (_pictureData != null)
{
_pictureViewModel = new LinkedPictureViewModel {
Pictures = _pictureData.Select(tpl => new LinkedPictureViewModel.LinkedPicture {
Title = tpl.Item1, ImageSource = tpl.Item2
})
};
}
}
else if (this.NavigationContext.QueryString["data"] != null)
{
var unescapedData = HttpUtility.UrlDecode(this.NavigationContext.QueryString["data"]);
var deserializedObject = JsonConvert.DeserializeObject <IEnumerable <Tuple <string, string> > >(unescapedData);
if (deserializedObject != null)
{
_pictureViewModel = new LinkedPictureViewModel {
Pictures = deserializedObject.Select(tpl => new LinkedPictureViewModel.LinkedPicture {
Title = tpl.Item1, ImageSource = tpl.Item2
})
};
_pictureData = deserializedObject;
}
}
if (DataContext == null)
{
DataContext = _pictureViewModel;
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
if (this.State != null && this.State.ContainsKey("PictureViewModelData"))
{
_pictureData = this.State["PictureViewModelData"] as string;
if (_pictureData != null)
{
var deserializedObject = JsonConvert.DeserializeObject<Tuple<string, IEnumerable<Tuple<string, string>>, string>>(_pictureData);
if (deserializedObject != null)
{
_pictureViewModel = new LinkedPictureViewModel
{
LinkTitle = deserializedObject.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(),
LinkId = deserializedObject.Item3,
Pictures = deserializedObject.Item2.Select(tpl => new LinkedPictureViewModel.LinkedPicture
{
Title = tpl.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(),
ImageSource = tpl.Item2, Url = tpl.Item2
})
};
}
}
}
else if (this.NavigationContext.QueryString["data"] != null)
{
var unescapedData = HttpUtility.UrlDecode(this.NavigationContext.QueryString["data"]);
var deserializedObject = JsonConvert.DeserializeObject<Tuple<string, IEnumerable<Tuple<string, string>>, string>>(unescapedData);
if (deserializedObject != null)
{
_pictureViewModel = new LinkedPictureViewModel
{
LinkTitle = deserializedObject.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(),
LinkId = deserializedObject.Item3,
Pictures = deserializedObject.Item2.Select(tpl => new LinkedPictureViewModel.LinkedPicture
{
Title = tpl.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(),
ImageSource = tpl.Item2, Url = tpl.Item2
})
};
_pictureData = unescapedData;
}
}
if (DataContext == null || e == null)
{
DataContext = _pictureViewModel;
}
_viewModelContextService.PushViewModelContext(DataContext as ViewModelBase);
_smartOfflineService.NavigatedToView(typeof(LinkedPictureView), e == null ? true : e.NavigationMode == NavigationMode.New);
}
/// <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 rawData = navigationParameter as Tuple<string, IEnumerable<Tuple<string, string>>, string>;
var pictureData = rawData.Item2;
if (pictureData == null && pageState != null && pageState.ContainsKey("NavagationData"))
{
var data = pageState["NavagationData"] as Tuple<string, IEnumerable<Tuple<string, string>>, string>;
_navData = pictureData = data.Item2;
}
if (pictureData != null)
{
_navData = pictureData;
var pictureTasks = pictureData.Select(async (tpl) =>
{
var imageBytes = await ServiceLocator.Current.GetInstance<IImagesService>().ImageBytesFromUrl(tpl.Item2);
if (imageBytes != null)
{
var renderer = GifRenderer.CreateGifRenderer(imageBytes);
if (renderer != null)
{
renderer.Visible = true;
return new LinkedPictureViewModel.LinkedPicture { Title = tpl.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(), ImageSource = renderer, Url = tpl.Item2 };
}
else
return new LinkedPictureViewModel.LinkedPicture { Title = tpl.Item1.Replace("&", "&").Replace("<", "<").Replace(">", ">").Replace(""", "\"").Replace("'", "'").Trim(), ImageSource = tpl.Item2, Url = tpl.Item2 };
}
else
return null;
})
.Where(val => val != null)
.ToArray();
_pictureViewModel = new LinkedPictureViewModel
{
Pictures = await Task.WhenAll(pictureTasks)
};
}
DataContext = _pictureViewModel;
}
/// <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;
}
private static Tuple<string, IEnumerable<Tuple<string, string>>, string> MakeSerializable(LinkedPictureViewModel vm)
{
return Tuple.Create(vm.LinkTitle, vm.Pictures.Select(linkedPicture => Tuple.Create(linkedPicture.Title, linkedPicture.Url)), vm.LinkId);
}
