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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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56
Source/LibationUiBase/GridView/GridEntry[TStatus].cs
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@ -37,7 +37,7 @@ namespace LibationUiBase.GridView
private string _purchasedate; private string _purchasedate;
private string _length; private string _length;
private LastDownloadStatus _lastDownload; private LastDownloadStatus _lastDownload;
private object _cover; private Lazy<object> _lazyCover;
private string _series; private string _series;
private SeriesOrder _seriesOrder; private SeriesOrder _seriesOrder;
private string _title; private string _title;
@ -55,7 +55,7 @@ namespace LibationUiBase.GridView
public string PurchaseDate { get => _purchasedate; protected set => RaiseAndSetIfChanged(ref _purchasedate, value); } public string PurchaseDate { get => _purchasedate; protected set => RaiseAndSetIfChanged(ref _purchasedate, value); }
public string Length { get => _length; protected set => RaiseAndSetIfChanged(ref _length, value); } public string Length { get => _length; protected set => RaiseAndSetIfChanged(ref _length, value); }
public LastDownloadStatus LastDownload { get => _lastDownload; protected set => RaiseAndSetIfChanged(ref _lastDownload, 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 string Series { get => _series; private set => RaiseAndSetIfChanged(ref _series, value); }
public SeriesOrder SeriesOrder { get => _seriesOrder; private set => RaiseAndSetIfChanged(ref _seriesOrder, value); } public SeriesOrder SeriesOrder { get => _seriesOrder; private set => RaiseAndSetIfChanged(ref _seriesOrder, value); }
public string Title { get => _title; private set => RaiseAndSetIfChanged(ref _title, value); } public string Title { get => _title; private set => RaiseAndSetIfChanged(ref _title, value); }
@ -132,7 +132,7 @@ namespace LibationUiBase.GridView
int bookLenMins = GetLengthInMinutes(); int bookLenMins = GetLengthInMinutes();
return bookLenMins == 0 ? "" : $"{bookLenMins / 60} hr {bookLenMins % 60} min"; return bookLenMins == 0 ? "" : $"{bookLenMins / 60} hr {bookLenMins % 60} min";
} }
#endregion #endregion
#region detect changes to the model, update the view. #region detect changes to the model, update the view.
@ -200,36 +200,31 @@ namespace LibationUiBase.GridView
#region Sorting #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(Remove), () => Remove.HasValue ? Remove.Value ? RemoveStatus.Removed : RemoveStatus.NotRemoved : RemoveStatus.SomeRemoved }, nameof(Series) => Book.SeriesSortable(),
{ nameof(Title), () => Book.TitleSortable() }, nameof(SeriesOrder) => SeriesOrder,
{ nameof(Series), () => Book.SeriesSortable() }, nameof(Length) => GetLengthInMinutes(),
{ nameof(SeriesOrder), () => SeriesOrder }, nameof(MyRating) => Book.UserDefinedItem.Rating,
{ nameof(Length), () => GetLengthInMinutes() }, nameof(PurchaseDate) => GetPurchaseDate(),
{ nameof(MyRating), () => Book.UserDefinedItem.Rating }, nameof(ProductRating) => Book.Rating,
{ nameof(PurchaseDate), () => GetPurchaseDate() }, nameof(Authors) => Authors,
{ nameof(ProductRating), () => Book.Rating }, nameof(Narrators) => Narrators,
{ nameof(Authors), () => Authors }, nameof(Description) => Description,
{ nameof(Narrators), () => Narrators }, nameof(Category) => Category,
{ nameof(Description), () => Description }, nameof(Misc) => Misc,
{ nameof(Category), () => Category }, nameof(LastDownload) => LastDownload,
{ nameof(Misc), () => Misc }, nameof(BookTags) => BookTags ?? string.Empty,
{ nameof(LastDownload), () => LastDownload }, nameof(Liberate) => Liberate,
{ nameof(BookTags), () => BookTags ?? string.Empty }, nameof(DateAdded) => DateAdded,
{ nameof(Liberate), () => Liberate }, _ => null
{ nameof(DateAdded), () => DateAdded }, };
};
}
public object GetMemberValue(string memberName) => memberValues[memberName]();
public IComparer GetMemberComparer(Type memberType) public IComparer GetMemberComparer(Type memberType)
=> memberTypeComparers.TryGetValue(memberType, out IComparer value) ? value : memberTypeComparers[memberType.BaseType]; => 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. // Instantiate comparers for every exposed member object type.
private static readonly Dictionary<Type, IComparer> memberTypeComparers = new() private static readonly Dictionary<Type, IComparer> memberTypeComparers = new()
{ {
@ -258,7 +253,7 @@ namespace LibationUiBase.GridView
PictureStorage.PictureCached += PictureStorage_PictureCached; PictureStorage.PictureCached += PictureStorage_PictureCached;
// Mutable property. Set the field so PropertyChanged isn't fired. // 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) private void PictureStorage_PictureCached(object sender, PictureCachedEventArgs e)
@ -272,7 +267,8 @@ namespace LibationUiBase.GridView
// logic validation // logic validation
if (e.Definition.PictureId == Book.PictureId) 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; PictureStorage.PictureCached -= PictureStorage_PictureCached;
} }
} }