loadBuffer method

  1. @Deprecated('loadBuffer is deprecated, use loadImage instead')
  2. @override
ImageStreamCompleter loadBuffer(
  1. CachedNetworkImageProvider key,
  2. DecoderBufferCallback decode
)
override

Converts a key into an ImageStreamCompleter, and begins fetching the image.

This method is deprecated. Implement loadImage instead.

The decode callback provides the logic to obtain the codec for the image.

See also:

  • ResizeImage, for modifying the key to account for cache dimensions.

Implementation

@Deprecated('loadBuffer is deprecated, use loadImage instead')
@override
ImageStreamCompleter loadBuffer(
  CachedNetworkImageProvider key,
  DecoderBufferCallback decode,
) {
  final chunkEvents = StreamController<ImageChunkEvent>();
  final imageStreamCompleter = MultiImageStreamCompleter(
    codec: _loadBufferAsync(key, chunkEvents, decode),
    chunkEvents: chunkEvents.stream,
    scale: key.scale,
    informationCollector: () sync* {
      yield DiagnosticsProperty<ImageProvider>(
        'Image provider: $this \n Image key: $key',
        this,
        style: DiagnosticsTreeStyle.errorProperty,
      );
    },
  );

  if (errorListener != null) {
    imageStreamCompleter.addListener(
      ImageStreamListener(
        (image, synchronousCall) {},
        onError: (Object error, StackTrace? trace) {
          errorListener?.call(error);
        },
      ),
    );
  }

  return imageStreamCompleter;
}