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fix: camera overlay rendering #1423

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merged 1 commit into from
May 4, 2024
Merged

fix: camera overlay rendering #1423

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30 changes: 21 additions & 9 deletions packages/espressocash_app/lib/features/qr_scanner/widgets/qr_scanner_background.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -6,14 +6,27 @@ import 'package:flutter_svg/flutter_svg.dart';

import '../../../gen/assets.gen.dart';

class QrScannerBackground extends StatelessWidget {
class QrScannerBackground extends StatefulWidget {
const QrScannerBackground({
super.key,
required this.child,
});

final Widget child;

@override
State<QrScannerBackground> createState() => _QrScannerBackgroundState();
}

class _QrScannerBackgroundState extends State<QrScannerBackground> {
late final Future<PictureInfo> _info;

@override
void initState() {
super.initState();
_info = _readFrame();
}

Future<PictureInfo> _readFrame() async {
final byteData = await rootBundle.load(Assets.images.qrFrame.path);

Expand All @@ -25,13 +38,10 @@ class QrScannerBackground extends StatelessWidget {

@override
Widget build(BuildContext context) => FutureBuilder<PictureInfo?>(
future: _readFrame(),
builder: (context, frame) => CustomPaint(
foregroundPainter: _Painter(
frame: frame.data,
dimension: 350,
),
child: child,
future: _info,
builder: (context, snapshot) => CustomPaint(
foregroundPainter: _Painter(frame: snapshot.data, dimension: 350),
child: widget.child,
),
);
}
Expand Down Expand Up @@ -91,5 +101,7 @@ class _Painter extends CustomPainter {
}

@override
bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
bool shouldRepaint(covariant _Painter oldDelegate) =>
oldDelegate.dimension != dimension ||
oldDelegate.frame?.size != frame?.size;
}
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