image_painter 0.4.1

A flutter package for drawing over images. Supports color, strokeWidth, different paintModes and exporting image.

example/lib/main.dart

import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:image_painter/image_painter.dart';
import 'package:open_file/open_file.dart';
import 'package:path_provider/path_provider.dart';

void main() => runApp(ExampleApp());

class ExampleApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Image Painter Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: ImagePainterExample(),
    );
  }
}

class ImagePainterExample extends StatefulWidget {
  @override
  _ImagePainterExampleState createState() => _ImagePainterExampleState();
}

class _ImagePainterExampleState extends State<ImagePainterExample> {
  final _imageKey = GlobalKey<ImagePainterState>();
  final _key = GlobalKey<ScaffoldState>();

  void saveImage() async {
    final image = await _imageKey.currentState.exportImage();
    final directory = (await getApplicationDocumentsDirectory()).path;
    await Directory('$directory/sample').create(recursive: true);
    final fullPath =
        '$directory/sample/${DateTime.now().millisecondsSinceEpoch}.png';
    final imgFile = File('$fullPath');
    imgFile.writeAsBytesSync(image);
    ScaffoldMessenger.of(context).showSnackBar(
      SnackBar(
        backgroundColor: Colors.grey[700],
        padding: const EdgeInsets.only(left: 10),
        content: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            const Text("Image Exported successfully.",
                style: TextStyle(color: Colors.white)),
            TextButton(
                onPressed: () => OpenFile.open("$fullPath"),
                child: Text("Open", style: TextStyle(color: Colors.blue[200])))
          ],
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: _key,
      appBar: AppBar(
        title: const Text("Image Painter Example"),
        actions: [
          IconButton(
            icon: const Icon(Icons.save_alt),
            onPressed: saveImage,
          )
        ],
      ),
      body: ImagePainter.asset(
        "assets/sample.jpg",
        key: _imageKey,
        scalable: false,
        initialPaintMode: PaintMode.line,
      ),
    );
  }
}