private async void ExecuteSearchForPodcastCommand()
{
m_View.BottomAppBar.IsOpen = false;
// show input dialog
InputMessageDialog dlg = new InputMessageDialog("Search term or RSS feed URL:");
bool result = await dlg.ShowAsync();
// cancel pressed
if (result == false)
{
return;
}
string searchTerm = dlg.TextBox.Text;
IEnumerable <Podcast> searchResults;
searchResults = await UIThread.RunInBackground <IEnumerable <Podcast> >(async() =>
{
return(await Data.Search(searchTerm));
});
await UIThread.Dispatch(async() =>
{
await Data.UpdateSearchResults(searchResults);
});
}
protected void UpdateFields(NotifyCollectionChangedEventArgs e)
{
UIThread.Dispatch(() =>
{
if (e == null)
{
m_Groups.Clear();
m_Groups.AddAll(Data.GetGroups().Select(PodcastGroupViewModelConstructor));
}
else if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (PodcastGroup group in e.NewItems)
{
m_Groups.Add(new PodcastGroupViewModel(group, ServiceContext));
}
}
});
}
private void UpdatePodcasts(NotifyCollectionChangedEventArgs e)
{
CoreDispatcher dispatcher = CoreApplication.MainView.CoreWindow.Dispatcher;
UIThread.Dispatch(() =>
{
if (e == null)
{
Podcasts.Clear();
Podcasts.AddAll(Data.Podcasts.Select((podcast) => new PodcastSummaryViewModel(podcast, ServiceContext)));
return;
}
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (var item in e.NewItems)
{
Podcast podcast = item as Podcast;
if (podcast != null)
{
Podcasts.Add(new PodcastSummaryViewModel(podcast, ServiceContext));
}
else
{
foreach (Podcast podcastItem in (IEnumerable <Podcast>)item)
{
Podcasts.Add(new PodcastSummaryViewModel(podcastItem, ServiceContext));
}
}
}
return;
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (Podcast podcast in e.OldItems)
{
Podcasts.RemoveFirst((podcastViewModel) => podcastViewModel.Data.Id == podcast.Id);
}
}
});
}
private void UpdateVisibleEpisodes()
{
UIThread.Dispatch(() =>
{
m_Episodes.Clear();
int i = 0;
lock (m_AllEpisodes)
{
foreach (Episode episode in m_AllEpisodes)
{
if (i >= m_NumEpisodesToShow)
{
break;
}
EpisodeViewModel viewModel = new EpisodeViewModel(episode, ServiceContext);
viewModel.Index = i++;
viewModel.Data.UpdateDownloadStatus();
m_Episodes.Add(viewModel);
}
}
});
}