painter

A simple flutter widget to paint with your fingers.

Features

The widget supports:

  • Changing fore- and background color
  • Changing the thickness of lines you draw
  • Exporting your painting as png
  • Undo drawing a line
  • Clearing the hole drawing

Some Notes

  • After calling 'finish()' on a PainterController you can't draw on this painting any more
  • To create a new painting after finishing the old one simply create a new PainterController
  • Calling 'finish()' for the first time will render the drawing. Successive calls will then return a cached version of the rendered picture

Example

For a full example take a look at the example project. Here is a short recording showing it. Note that the color picker is an external dependency which is only required for the example.

demo!

Libraries

painter

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. [...]