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Description:

custom qr generator

Custom QR generator for Flutter #

Flutter port of Android library
Progress #

✅ Vector codes
✅ Base and custom shapes
✅ Base and custom colors
🚧 Logo

Installing #
Depend on it #
Run command
$ flutter pub add custom_qr_generator
This will add a line like this to your package's pubspec.yaml (and run an implicit flutter pub get):
dependencies:
custom_qr_generator: ^0.1.2
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Import it #
Now in your Dart code, you can use:
import 'package:custom_qr_generator/custom_qr_generator.dart';
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Usage #
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Welcome to Flutter',
home: Scaffold(
appBar: AppBar(
title: const Text('Welcome to Flutter'),
),
body: Center(
child: CustomPaint(
painter: QrPainter(
data: "Welcome to Flutter",
options: const QrOptions(
shapes: QrShapes(
darkPixel: QrPixelShapeRoundCorners(
cornerFraction: .5
),
frame: QrFrameShapeRoundCorners(
cornerFraction: .25
),
ball: QrBallShapeRoundCorners(
cornerFraction: .25
)
),
colors: QrColors(
dark: QrColorLinearGradient(
colors: [
Color.fromARGB(255, 255, 0, 0),
Color.fromARGB(255, 0, 0, 255),
],
orientation: GradientOrientation.leftDiagonal
)
)
)),
size: const Size(350, 350),
),
),
),
);
}
}

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Customization #
You can implement custom shapes for any QR code parts: QrPixelShape, QrBallShape, QrFrameShape
like this:
class QrPixelShapeCircle extends QrPixelShape {

@override
Path createPath(double size, Neighbors neighbors) =>
Path()..addOval(Rect.fromLTRB(0, 0, size, size));
}
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Also you can create custom paint for this elements:

class QrColorRadialGradient extends QrColor {

final List<Color> colors;

const QrColorRadialGradient({
required this.colors,
});

@override
Paint createPaint(final double width, final double height) =>
Paint()
..shader = Gradient.radial(
Offset(width / 2, height / 2),
min(width, height),
colors
);
}

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