tree de5617543326f5cfb16dc7149c17fc88ac381be3
parent ca4ad6dc5a63a8c1b2b9d6eb0abbf3cd485cefe6
author Todd Volkert <tvolkert@users.noreply.github.com> 1558475729 -0700
committer GitHub <noreply@github.com> 1558475729 -0700
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Add support for ImageStreamListener.onChunk() (#33092)

This is another step towards supporting image loading
progress notification at the widgets layer.

This adds an `ImageChunkEvent` class along with associated
`ImageChunkListener` callback signature and an `onChunk`
property to `ImageStreamListener`. The events serve to
notify registered listeners when byte chunks are received
while loading an image.

https://github.com/flutter/flutter/issues/32374