private async void DownloadLanguageCompleted(OcrLanguage language, Exception error)
{
if (language != null && language.Tag != null)
{
await Device.InvokeOnMainThreadAsync(() => (language.Tag as Label).IsEnabled = true);
}
if (error == null)
{
// Download completed successfully, then remove the downloaded language from the downloadable languages list and add it to the inactive languages list.
await Device.InvokeOnMainThreadAsync(async() =>
{
if (language != null && !language.CancellationTokenSource.IsCancellationRequested)
{
DownloadableLanguages = OcrLanguageManager.DownloadableLanguages;
var langs = InactiveLanguages.Where(l => l.Language.Equals(language.Language));
if (langs == null || langs.Count() == 0)
{
InactiveLanguages.Add(language);
}
language.IsDownloadable = false;
await Device.InvokeOnMainThreadAsync(() => ReloadCachedLanguagesInfo());
}
});
}
else
{
// Error occurred while downloading this language
await Device.InvokeOnMainThreadAsync(async() =>
{
ReloadCachedLanguagesInfo();
await DisplayAlert("Error Downloading File", $"Encountered an error while trying to download the {language.LocalizedName} language: {error.Message}", "OK");
});
}
}
private void DeleteLanguageButton_Tapped(object sender, EventArgs e)
{
OcrLanguage ocrLanguage = (sender as SvgImage).BindingContext as OcrLanguage;
if (ocrLanguage == null)
{
return;
}
OcrLanguageManager.DeleteLanguage(ocrLanguage.Language);
ocrLanguage.IsDownloadable = true;
// Manually remove from active/inactive languages, then manually add to downloadable languages
if (ActiveLanguages.Contains(ocrLanguage))
{
ActiveLanguages.Remove(ocrLanguage);
}
else if (InactiveLanguages.Contains(ocrLanguage))
{
InactiveLanguages.Remove(ocrLanguage);
}
if (!DownloadableLanguages.Contains(ocrLanguage))
{
// Take the language from OcrLanguageManager.DownloadableLanguages instead of the local downloadable languages list since that one
// has the updated class members like file size and what not.
var langs = OcrLanguageManager.DownloadableLanguages.Where(l => l.Language.Equals(ocrLanguage.Language));
if (langs != null && langs.Count() > 0)
{
ocrLanguage = langs.ElementAt(0);
}
DownloadableLanguages.Add(ocrLanguage);
}
ReloadCachedLanguagesInfo();
}
private void PopulateActiveInactiveLanguages()
{
InactiveLanguages.Clear();
foreach (OcrLanguage localLanguage in OcrLanguageManager.LocalLanguages)
{
localLanguage.IsDefaultLanguage = false;
if (!ActiveLanguages.Any(l => l.Language.Equals(localLanguage.Language)))
{
InactiveLanguages.Add(localLanguage);
}
}
foreach (OcrLanguage activeLanguage in ActiveLanguages)
{
activeLanguage.IsDefaultLanguage = ActiveLanguages[0].Equals(activeLanguage);
}
var inactiveLanguages = InactiveLanguages.OrderBy(firstOrder => firstOrder.CanBeDeleted).ThenBy(secondOrder => secondOrder.LocalizedName);
InactiveLanguages = new ObservableCollection <OcrLanguage>(inactiveLanguages);
RefreshActiveInactiveListViews();
}