public ChildAttachmentsProviderConfig(PhotoAttachmentModel parentAttachment)
{
Predicate = model =>
parentAttachment.ChildAttachmentDescriptors.Any(childDescriptor =>
childDescriptor.ChildAttachmentId == model.Id);
DecoratorTransform = PhotoDecoratorTransform;
}
private PhotoAttachmentViewModel(PhotoAttachmentModel photoModel, bool isReadonly) : base(photoModel, isReadonly)
{
if (photoModel.PreviewDataBlob?.Any() ?? false)
{
DispatcherHelper.InvokeOnDispatcher(() =>
//DispatcherHelper.BeginInvokeOnDispatcher(() =>
{
PreviewProvider.SetPreview(photoModel);
Preview.SetPreviewSource(PreviewProvider.GetPreview(photoModel.Id));
});
}
}
/// <summary>
/// Сохранить в кэш данные превью фотографии.
/// </summary>
public static void SetPreview(PhotoAttachmentModel photoModel)
{
lock (Locker)
{
if (previewSources.ContainsKey(photoModel.Id))
{
return;
}
string previewFilePath = Path.Combine(previewFolderPath, $"preview_{photoModel.Id}");
File.WriteAllBytes(previewFilePath, photoModel.PreviewDataBlob);
previewSources.Add(photoModel.Id,
new BitmapImage(new Uri(previewFilePath, UriKind.Absolute))
{
CacheOption = BitmapCacheOption.None,
CreateOptions = BitmapCreateOptions.DelayCreation
});
}
}
public static PhotoAttachmentViewModel CreateEditable(PhotoAttachmentModel photoModel)
{
return(new PhotoAttachmentViewModel(photoModel, false));
}
public static PhotoAttachmentViewModel CreateReadonly(PhotoAttachmentModel photoModel)
{
return(new PhotoAttachmentViewModel(photoModel, true));
}
