150 lines
4.5 KiB
Dart
150 lines
4.5 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:image/image.dart' as img;
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import 'package:image_picker/image_picker.dart';
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import 'package:qr_code_scanner/qr_code_scanner.dart';
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import 'package:zxing2/qrcode.dart';
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import '../../common.dart';
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import '../widgets/dialog.dart';
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class ScanPage extends StatefulWidget {
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@override
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State<ScanPage> createState() => _ScanPageState();
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}
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class _ScanPageState extends State<ScanPage> {
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QRViewController? controller;
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final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
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// In order to get hot reload to work we need to pause the camera if the platform
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// is android, or resume the camera if the platform is iOS.
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@override
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void reassemble() {
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super.reassemble();
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if (isAndroid) {
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controller!.pauseCamera();
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}
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controller!.resumeCamera();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Scan QR'),
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actions: [
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IconButton(
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color: Colors.white,
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icon: Icon(Icons.image_search),
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iconSize: 32.0,
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onPressed: () async {
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final ImagePicker picker = ImagePicker();
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final XFile? file =
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await picker.pickImage(source: ImageSource.gallery);
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if (file != null) {
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var image = img.decodeNamedImage(
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File(file.path).readAsBytesSync(), file.path)!;
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LuminanceSource source = RGBLuminanceSource(
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image.width,
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image.height,
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image
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.getBytes(format: img.Format.abgr)
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.buffer
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.asInt32List());
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var bitmap = BinaryBitmap(HybridBinarizer(source));
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var reader = QRCodeReader();
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try {
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var result = reader.decode(bitmap);
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showServerSettingFromQr(result.text);
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} catch (e) {
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showToast('No QR code found');
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}
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}
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}),
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IconButton(
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color: Colors.yellow,
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icon: Icon(Icons.flash_on),
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iconSize: 32.0,
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onPressed: () async {
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await controller?.toggleFlash();
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}),
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IconButton(
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color: Colors.white,
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icon: Icon(Icons.switch_camera),
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iconSize: 32.0,
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onPressed: () async {
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await controller?.flipCamera();
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},
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),
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],
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),
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body: _buildQrView(context));
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}
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Widget _buildQrView(BuildContext context) {
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// For this example we check how width or tall the device is and change the scanArea and overlay accordingly.
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var scanArea = (MediaQuery.of(context).size.width < 400 ||
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MediaQuery.of(context).size.height < 400)
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? 150.0
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: 300.0;
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// To ensure the Scanner view is properly sizes after rotation
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// we need to listen for Flutter SizeChanged notification and update controller
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return QRView(
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key: qrKey,
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onQRViewCreated: _onQRViewCreated,
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overlay: QrScannerOverlayShape(
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borderColor: Colors.red,
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borderRadius: 10,
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borderLength: 30,
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borderWidth: 10,
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cutOutSize: scanArea),
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onPermissionSet: (ctrl, p) => _onPermissionSet(context, ctrl, p),
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);
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}
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void _onQRViewCreated(QRViewController controller) {
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setState(() {
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this.controller = controller;
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});
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controller.scannedDataStream.listen((scanData) {
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if (scanData.code != null) {
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showServerSettingFromQr(scanData.code!);
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}
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});
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}
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void _onPermissionSet(BuildContext context, QRViewController ctrl, bool p) {
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if (!p) {
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showToast('No permission');
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}
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}
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@override
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void dispose() {
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controller?.dispose();
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super.dispose();
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}
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void showServerSettingFromQr(String data) async {
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closeConnection();
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await controller?.pauseCamera();
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if (!data.startsWith('config=')) {
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showToast('Invalid QR code');
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return;
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}
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try {
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final sc = ServerConfig.decode(data.substring(7));
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Timer(Duration(milliseconds: 60), () {
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showServerSettingsWithValue(sc, gFFI.dialogManager);
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});
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} catch (e) {
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showToast('Invalid QR code');
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}
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}
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}
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