private async Task RebuildSubFolderList(FolderReadingDialog dialog)
{
foreach (var item in this.NavigationPane.MenuItems)
{
if (item is NavigationViewItem nv)
{
if (nv.Content is FolderListItem fd)
{
fd.Release();
}
}
}
this.NavigationPane.MenuItems.Clear();
if (this.thumbnailPages != null)
{
foreach (var page in this.thumbnailPages)
{
page.Release();
}
}
this.thumbnailPages = new List <ThumbnailPage>();
var count = MediaManager.FolderEntries.Length;
dialog.IsIndeterminate = false;
dialog.Maximum = count;
var trees = FolderListItem.BuildTreeString(MediaManager.FolderEntries);
for (int i = 0; i < count; i++)
{
var folder = MediaManager.FolderEntries[i];
dialog.Value = i;
var item = new FolderListItem {
FolderEntry = folder, TreeText = trees[i]
};
var navigationitem = new NavigationViewItem()
{
Content = item
};
this.NavigationPane.MenuItems.Add(navigationitem);
var cover = await MediaManager.FindFolderThumbnailEntry(folder);
if (cover != null)
{
_ = this.UpdateFolderThumbnail(cover, item);
}
}
dialog.Value = count;
this.NavigationPane.SelectedItem = this.NavigationPane.MenuItems[0];
}
private async Task <Exception> ChangeMediaProvider(AbstractMediaProvider provider)
{
if (this.NavigationPane.SelectedItem is NavigationViewItem selectedItem)
{
if (selectedItem.Content is FolderListItem item)
{
var page = this.thumbnailPages.Find((p) => p.Entry == item.FolderEntry);
if (page != null)
{
page.CancellationToken.Cancel();
}
}
}
FolderReadingDialog dialog = new FolderReadingDialog();
_ = dialog.ShowAsync(ContentDialogPlacement.Popup);
Exception error;
error = await MediaManager.ChangeProvider(provider);
if (error != null)
{
dialog.Hide();
return(error);
}
await this.RebuildSubFolderList(dialog);
GC.Collect();
this.ThumbnailBorder.Opacity = 0;
this.HideImageControl();
this.IsEnabled = true;
dialog.Hide();
return(null);
}