Photo View – Zoomable Images

flutter photo view

a simple zoomable image widget for flutter

photo view is useful in full-screen exhibition cases.

resolves an image provider and show the result with useful gestures support, such as pinch to zoom and pan.

installation

add photo_view as a dependency in your pubspec.yaml file.

import photo view:

import 'package:photo_view/photo_view.dart';

sample code

given a imageprovider imageprovider (such as assetimage or networkimage):

@override
widget build(buildcontext context) {
  return new container(
    child: new photoview(
      imageprovider: assetimage("assets/large-image.jpg"),
      minscale: photoviewcomputedscale.contained * 0.8,
      maxscale: 4.0,
    );
  );
}

inline usage

if you want photoview to scale the image in container with size different than the screen, use photoviewinline instead.

@override
widget build(buildcontext context) {
  return new container(
    child: new photoviewinline(
      imageprovider: assetimage("assets/large-image.jpg"),
      minscale: photoviewcomputedscale.contained * 0.8,
      maxscale: 4.0,
    );
  );
}

api

for more information about how to use photo view, check the api docs

screenshots

limited scale	inline	hero animation

todo:

• [x] scale on doubletap
• [x] zoom when pinched
• [x] respect screen and image boundaries
• [x] center image when zooming out
• [x] add image zoom limits (minscale an maxscale)
• [x] add gif support
• [ ] multiple image support (gallery mode)
• [ ] rotate gesture rotates image (work in progress)

pull requests are welcome.

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