private async void Comics_ComicsChanged(ComicView sender, ComicsChangedEventArgs e)
{
switch (e.Type)
{
case ComicChangeType.ItemsChanged:
if (this.Comics.Any() && this.Comics.First() != this.thumbnailComic)
{
this.thumbnailComic = this.Comics.First();
this.ThumbnailImageSource = new Uri(Thumbnail.ThumbnailPath(this.thumbnailComic));
this.OnPropertyChanged(nameof(this.ThumbnailImageSource));
}
this.OnPropertyChanged(nameof(this.Subtitle));
// note: title cannot be changed. Changing title means removing this item and adding a new one.
break;
case ComicChangeType.ThumbnailChanged:
if (this.thumbnailComic is not null && e.Modified.Contains(this.thumbnailComic))
{
await this.RefreshImageSourceAsync();
}
break;
case ComicChangeType.Refresh:
// the parent's job, not ours
break;
default:
throw new ProgrammerError($"{nameof(this.Comics_ComicsChanged)}: unhandled switch case");
}
}
public ComicNavigationItem(string name, ComicView comics)
{
this.Title = name;
this.Comics = comics;
if (comics.Any())
{
var thumbnailComic = comics.First();
this.ThumbnailImageSource = new Uri(Thumbnail.ThumbnailPath(thumbnailComic));
}
comics.ComicsChanged += this.Comics_ComicsChanged;
}
private async void View_ComicsChanged(ComicView sender, ComicsChangedEventArgs e)
{
switch (e.Type) // switch ChangeType
{
case ComicChangeType.ItemsChanged:
// Added: handled by ComicItemGrid
if (e.Modified.Any())
{
var match = e.Modified.Where(comic => comic.IsSame(this.Comic)).FirstOrNull();
if (match is { } comic)
{
this.Comic = comic;
this.OnPropertyChanged("");
// an item can't be modified and removed at the same time
return;
}
}
if (!e.Removed.Contains(this.Comic))
{
return;
}
this.owner.ComicsChanged -= this.View_ComicsChanged;
this.RequestingRefresh(this, RequestingRefreshType.Remove);
return;
case ComicChangeType.Refresh:
// the parent will have called refresh, so we don't need to do anything.
return;
case ComicChangeType.ThumbnailChanged:
if (!e.Modified.Contains(this.Comic))
{
return;
}
await this.RefreshImageSourceAsync();
return;
default:
throw new ProgrammerError($"{nameof(this.View_ComicsChanged)}: unhandled switch case");
}
}
public ComicWorkItemGridViewModel(
IMainPageContent parent,
MainViewModel mainViewModel,
ComicView comics,
ComicItemGridViewModelProperties?properties = null,
ComicItemGridState?savedState = null
) : base(parent, mainViewModel)
{
this.Properties = properties ?? new ComicItemGridViewModelProperties();
this.comics = comics.Sorted(this.SelectedSortSelector);
this.comics.ComicsChanged += this.Comics_ComicsChanged;
if (savedState?.LastModified is { } lastModified&& lastModified == mainViewModel.LastModified)
{
this.SetComicItems(savedState.Items);
}
