/// <summary>
/// Databinded Command to add comic to list of comics
/// </summary>
public void AddComicExecute()
{
if (SelectedComic == null)
{
throw new PresentationException("Gelieve een strip te selecteren.");
}
ViewComic comic = SelectedComic;
int amount = OrderAmount;
ComicList.Add(new KeyValuePair <ViewComic, int>(comic, amount));
}
private async Task CurrentItemChanged(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var comicNumberToLoad = CurrentComic.Num - _cacheSize;
if (comicNumberToLoad <= 0 || ComicList.Any(x => x.Num == comicNumberToLoad))
{
return;
}
var comic = await DownloadComicAsync(comicNumberToLoad);
await Device.InvokeOnMainThreadAsync(() =>
{
ComicList.Add(comic);
});
}
private async Task InitAsync()
{
try
{
// I don't know why this statement is slow (2 or 3 sec)...
// So I moved it in my async init task.
CurrentItemChangedCommand = ReactiveCommand.CreateFromTask(CurrentItemChanged);
var firstModel = await DownloadComicAsync();
var tasksList = new List <Task <XkcdComic> >();
for (var i = 0; i < _cacheSize; ++i)
{
tasksList.Add(DownloadComicAsync(firstModel.Num - 1 - i));
}
await Task.WhenAll(tasksList);
await Device.InvokeOnMainThreadAsync(async() =>
{
ComicList.Add(firstModel);
foreach (var task in tasksList)
{
ComicList.Add(await task);
}
});
}
catch (Exception e)
{
Console.WriteLine(e);
}
finally
{
IsBusy = false;
}
}