/* ----------------------------------------------------------------- */
///
/// ImageEntry
///
/// <summary>
/// Initializes a new instance of the ImageItem class with the
/// specified arguments.
/// </summary>
///
/// <param name="image">Delegation to get an image.</param>
/// <param name="selection">Shared object for selection.</param>
/// <param name="preferences">Image preferences.</param>
///
/* ----------------------------------------------------------------- */
public ImageItem(Func <ImageItem, ImageSource> image,
ImageSelection selection, ImagePreferences preferences)
{
_dispose = new OnceAction <bool>(Dispose);
_image = image;
_selection = selection;
_preferences = preferences;
_preferences.PropertyChanged += WhenPreferencesChanged;
}
/* ----------------------------------------------------------------- */
///
/// ImageCollection
///
/// <summary>
/// Initializes a new instance of the ImageCollection class with
/// the specified arguments.
/// </summary>
///
/// <param name="getter">Function to get the renderer.</param>
/// <param name="context">Synchronization context.</param>
///
/* ----------------------------------------------------------------- */
public ImageCollection(Func <string, IDocumentRenderer> getter, SynchronizationContext context)
{
ImageSource create(ImageItem e) => getter(e.RawObject.File.FullName).Create(e);
void update(string s)
{
if (s == nameof(Preferences.VisibleLast))
{
Reschedule(null);
}
};
_inner = new ObservableCollection <ImageItem>();
_cache = new CacheCollection <ImageItem, ImageSource>(create);
_inner.CollectionChanged += (s, e) => OnCollectionChanged(e);
_cache.Created += (s, e) => e.Key.Refresh();
_cache.Failed += (s, e) => this.LogDebug($"[{e.Key.Index}] {e.Value.GetType().Name}");
Selection = new ImageSelection {
Context = context
};
Preferences = new ImagePreferences {
Context = context
};
Create = (i, r) =>
{
if (i < 0 || i >= Count)
{
return(null);
}
var src = _inner[i].RawObject;
return(getter(src.File.FullName).Create(src, r));
};
Convert = (e) => Preferences.FrameOnly ? null :
_cache.TryGetValue(e, out var dest) ? dest :
Preferences.Dummy;
Preferences.PropertyChanged += (s, e) => update(e.PropertyName);
}
