public override NSObject PhotoAlbumScrollView (NIPhotoAlbumScrollView photoAlbumScrollView, int photoIndex, out NIPhotoScrollViewPhotoSize photoSize, out bool isLoading, out SizeF originalPhotoDimensions)
{
isLoading = false;
photoSize = NIPhotoScrollViewPhotoSize.NIPhotoScrollViewPhotoSizeUnknown;
UIImage image;
var photoIndexKey = _controller.CacheKeyForPhotoIndex (photoIndex);
var photo = Photos [photoIndex];
originalPhotoDimensions = photo.Dimensions;
image = (UIImage)_controller.HighQualityImageCache.ObjectWithName (photoIndexKey);
if (image != null) {
photoSize = NIPhotoScrollViewPhotoSize.NIPhotoScrollViewPhotoSizeOriginal;
} else {
var source = photo.OriginalSource;
_controller.RequestImageFromSource (source, NIPhotoScrollViewPhotoSize.NIPhotoScrollViewPhotoSizeOriginal, photoIndex);
isLoading = true;
// try to load the thumbnail if we can
image = (UIImage)_controller.ThumbnailImageCache.ObjectWithName (photoIndexKey);
if (image != null) {
photoSize = NIPhotoScrollViewPhotoSize.NIPhotoScrollViewPhotoSizeThumbnail;
} else {
_controller.RequestImageFromSource(photo.ThumbnailSoruce, NIPhotoScrollViewPhotoSize.NIPhotoScrollViewPhotoSizeThumbnail, photoIndex);
}
}
return image;
}
public override void PhotoAlbumScrollViewDidLoadPreviousPhoto (NIPhotoAlbumScrollView photoAlbumScrollView)
{
// overridden so that the native call won't be made because it isn't implemented in NIToolbarPhotoViewController
}
