scalable_image

A widget that shows an image which can be scaled and dragged using gestures. This package was designed for quadratic images. It can happen that it don't behave as you expect for non quadratic images. A workaround is to wrap this image in an AspectRatio with an aspect ratio of the target image. This has the drawback that it does not fill the whole space while zooming since it will contain the aspect ratio. Feel free to fork on github.

Getting Started

You can also try using an other ImageProvider, like NetworkImage and FileImage.

new ScalableImage(
          imageProvider: new AssetImage('assets/example.png'),
          dragSpeed: 4.0,
          maxScale: 16.0
        )

That's all you need. See below and example/ for an example.

demo!

Libraries

scalable_image

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]