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Lazy load cover to improve startup time

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This commit is contained in:
Mbucari 2023-08-10 10:18:28 -06:00
parent 97f94d8782
commit 893d68190d
1 changed files with 26 additions and 30 deletions
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52
Source/LibationUiBase/GridView/GridEntry[TStatus].cs
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@ -37,7 +37,7 @@ namespace LibationUiBase.GridView
private string _purchasedate;
private string _length;
private LastDownloadStatus _lastDownload;
private object _cover;
private Lazy<object> _lazyCover;
private string _series;
private SeriesOrder _seriesOrder;
private string _title;
@ -55,7 +55,7 @@ namespace LibationUiBase.GridView
public string PurchaseDate { get => _purchasedate; protected set => RaiseAndSetIfChanged(ref _purchasedate, value); }
public string Length { get => _length; protected set => RaiseAndSetIfChanged(ref _length, value); }
public LastDownloadStatus LastDownload { get => _lastDownload; protected set => RaiseAndSetIfChanged(ref _lastDownload, value); }
public object Cover { get => _cover; private set => RaiseAndSetIfChanged(ref _cover, value); }
public object Cover { get => _lazyCover.Value; }
public string Series { get => _series; private set => RaiseAndSetIfChanged(ref _series, value); }
public SeriesOrder SeriesOrder { get => _seriesOrder; private set => RaiseAndSetIfChanged(ref _seriesOrder, value); }
public string Title { get => _title; private set => RaiseAndSetIfChanged(ref _title, value); }
@ -200,36 +200,31 @@ namespace LibationUiBase.GridView
#region Sorting
public GridEntry()
public object GetMemberValue(string memberName) => memberName switch
{
memberValues = new()
{
{ nameof(Remove), () => Remove.HasValue ? Remove.Value ? RemoveStatus.Removed : RemoveStatus.NotRemoved : RemoveStatus.SomeRemoved },
{ nameof(Title), () => Book.TitleSortable() },
{ nameof(Series), () => Book.SeriesSortable() },
{ nameof(SeriesOrder), () => SeriesOrder },
{ nameof(Length), () => GetLengthInMinutes() },
{ nameof(MyRating), () => Book.UserDefinedItem.Rating },
{ nameof(PurchaseDate), () => GetPurchaseDate() },
{ nameof(ProductRating), () => Book.Rating },
{ nameof(Authors), () => Authors },
{ nameof(Narrators), () => Narrators },
{ nameof(Description), () => Description },
{ nameof(Category), () => Category },
{ nameof(Misc), () => Misc },
{ nameof(LastDownload), () => LastDownload },
{ nameof(BookTags), () => BookTags ?? string.Empty },
{ nameof(Liberate), () => Liberate },
{ nameof(DateAdded), () => DateAdded },
nameof(Remove) => Remove.HasValue ? Remove.Value ? RemoveStatus.Removed : RemoveStatus.NotRemoved : RemoveStatus.SomeRemoved,
nameof(Title) => Book.TitleSortable(),
nameof(Series) => Book.SeriesSortable(),
nameof(SeriesOrder) => SeriesOrder,
nameof(Length) => GetLengthInMinutes(),
nameof(MyRating) => Book.UserDefinedItem.Rating,
nameof(PurchaseDate) => GetPurchaseDate(),
nameof(ProductRating) => Book.Rating,
nameof(Authors) => Authors,
nameof(Narrators) => Narrators,
nameof(Description) => Description,
nameof(Category) => Category,
nameof(Misc) => Misc,
nameof(LastDownload) => LastDownload,
nameof(BookTags) => BookTags ?? string.Empty,
nameof(Liberate) => Liberate,
nameof(DateAdded) => DateAdded,
_ => null
};
}
public object GetMemberValue(string memberName) => memberValues[memberName]();
public IComparer GetMemberComparer(Type memberType)
=> memberTypeComparers.TryGetValue(memberType, out IComparer value) ? value : memberTypeComparers[memberType.BaseType];
private readonly Dictionary<string, Func<object>> memberValues;
// Instantiate comparers for every exposed member object type.
private static readonly Dictionary<Type, IComparer> memberTypeComparers = new()
{
@ -258,7 +253,7 @@ namespace LibationUiBase.GridView
PictureStorage.PictureCached += PictureStorage_PictureCached;
// Mutable property. Set the field so PropertyChanged isn't fired.
_cover = Liberate.LoadImage(picture);
_lazyCover = new Lazy<object>(() => Liberate.LoadImage(picture));
}
private void PictureStorage_PictureCached(object sender, PictureCachedEventArgs e)
@ -272,7 +267,8 @@ namespace LibationUiBase.GridView
// logic validation
if (e.Definition.PictureId == Book.PictureId)
{
Cover = Liberate.LoadImage(e.Picture);
_lazyCover = new Lazy<object>(() => Liberate.LoadImage(e.Picture));
RaisePropertyChanged(nameof(Cover));
PictureStorage.PictureCached -= PictureStorage_PictureCached;
}
}