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A simple zoomable image widget for Flutter

A simple zoomable image widget for Flutter

Flutter Photo View

A simple zoomable image widget for Flutter

PhotoView is useful in full screen exibition cases.

Resolves a 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

Large image Small image Animated GIF
In action In action In action
Limited scale Inline Hero animation
In action In action In action

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 😊.

GitHub