rustdesk/flutter/lib/mobile/pages/scan_page.dart

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