vjrj
d0d2ecb132
Adds a QrView (painted from the pure-Dart 'barcode' matrix — already transitive via pdf, no native plugin) and shows a QR of your npub on the profile identity card, so you can hand your identity over with a scan. Analyzer clean.
54 lines
1.3 KiB
Dart
54 lines
1.3 KiB
Dart
import 'package:barcode/barcode.dart';
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import 'package:flutter/material.dart';
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/// Renders [data] as a QR code, painted from the pure-Dart `barcode` matrix (no
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/// native plugin). Used for the profile's shareable identity — hand your npub to
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/// someone at a fair with a scan.
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class QrView extends StatelessWidget {
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const QrView({required this.data, this.size = 200, super.key});
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final String data;
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final double size;
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@override
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Widget build(BuildContext context) {
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return Container(
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width: size,
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height: size,
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color: Colors.white,
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padding: const EdgeInsets.all(8),
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child: CustomPaint(
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size: Size.square(size),
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painter: _QrPainter(data),
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),
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);
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}
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}
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class _QrPainter extends CustomPainter {
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_QrPainter(this.data);
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final String data;
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@override
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void paint(Canvas canvas, Size size) {
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final black = Paint()..color = Colors.black;
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for (final element in Barcode.qrCode()
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.make(data, width: size.width, height: size.height)) {
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if (element is BarcodeBar && element.black) {
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canvas.drawRect(
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Rect.fromLTWH(
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element.left,
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element.top,
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element.width,
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element.height,
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),
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black,
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);
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}
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}
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}
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@override
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bool shouldRepaint(_QrPainter oldDelegate) => oldDelegate.data != data;
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}
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