439 lines
13 KiB
Dart
439 lines
13 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:mobile_scanner/mobile_scanner.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:permission_handler/permission_handler.dart';
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import 'package:lba/res/colors.dart';
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import 'package:lba/widgets/app_snackbar.dart';
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class QRScannerPage extends StatefulWidget {
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const QRScannerPage({super.key});
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@override
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State<QRScannerPage> createState() => _QRScannerPageState();
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}
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class _QRScannerPageState extends State<QRScannerPage> {
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MobileScannerController cameraController = MobileScannerController();
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bool _isFlashOn = false;
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bool _isProcessing = false;
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@override
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void initState() {
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super.initState();
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}
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@override
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void dispose() {
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cameraController.dispose();
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super.dispose();
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}
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void _toggleFlash() {
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setState(() {
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_isFlashOn = !_isFlashOn;
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});
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cameraController.toggleTorch();
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}
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Future<bool> _requestStoragePermission() async {
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final status = await Permission.photos.status;
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if (status.isGranted) {
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return true;
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}
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if (status.isDenied) {
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final result = await Permission.photos.request();
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return result.isGranted;
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}
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if (status.isPermanentlyDenied) {
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_showPermissionDeniedDialog();
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return false;
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}
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return false;
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}
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void _showPermissionDeniedDialog() {
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showDialog(
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context: context,
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builder: (context) => AlertDialog(
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title: const Text('Permission Required'),
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content: const Text(
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'This app needs access to your photos to select QR code images. Please enable the permission in Settings.',
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(context),
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child: const Text('Cancel'),
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),
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ElevatedButton(
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onPressed: () {
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Navigator.pop(context);
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openAppSettings();
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},
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child: const Text('Open Settings'),
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),
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],
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),
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);
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}
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Future<void> _pickImageFromGallery() async {
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final hasPermission = await _requestStoragePermission();
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if (!hasPermission) {
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return;
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}
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try {
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final ImagePicker picker = ImagePicker();
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final XFile? image = await picker.pickImage(
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source: ImageSource.gallery,
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maxWidth: 1024,
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maxHeight: 1024,
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imageQuality: 85,
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);
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if (image != null) {
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final fileName = image.name;
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final fileSize = await image.length();
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final fileSizeKB = (fileSize / 1024).toStringAsFixed(1);
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_handleScanResult('Image selected:\nFile: $fileName\nSize: ${fileSizeKB}KB\nPath: ${image.path}');
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}
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} catch (e) {
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AppSnackBar.showError(
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context: context,
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message: 'Error selecting image: $e',
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);
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}
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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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backgroundColor: AppColors.scaffoldBackground,
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body: Stack(
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children: [
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MobileScanner(
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controller: cameraController,
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onDetect: (capture) {
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if (_isProcessing) return;
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final List<Barcode> barcodes = capture.barcodes;
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if (barcodes.isNotEmpty) {
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final String code = barcodes.first.rawValue ?? '';
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if (code.isNotEmpty) {
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setState(() {
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_isProcessing = true;
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});
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_handleScanResult(code);
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}
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}
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},
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errorBuilder: (context, error, child) {
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return Container(
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width: double.infinity,
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height: double.infinity,
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color: AppColors.scaffoldBackground,
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child: Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.camera_alt_outlined,
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color: AppColors.textSecondary,
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size: 64,
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),
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const SizedBox(height: 16),
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Text(
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'Camera Error',
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textAlign: TextAlign.center,
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style: TextStyle(
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color: AppColors.textPrimary,
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 8),
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Text(
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'Please check camera permissions',
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textAlign: TextAlign.center,
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style: TextStyle(
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color: AppColors.textSecondary,
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fontSize: 14,
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),
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),
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],
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),
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),
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);
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},
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),
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SafeArea(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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IconButton(
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icon: Icon(
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Icons.arrow_back,
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color: AppColors.textPrimary,
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size: 28,
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),
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onPressed: () => Navigator.pop(context),
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),
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Text(
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'Scan QR Code',
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style: TextStyle(
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color: AppColors.textPrimary,
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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IconButton(
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icon: Icon(
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_isFlashOn ? Icons.flash_on : Icons.flash_off,
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color: AppColors.textPrimary,
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size: 28,
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),
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onPressed: _toggleFlash,
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),
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],
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),
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),
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),
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Center(
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child: SizedBox(
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width: 250,
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height: 250,
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child: Stack(
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children: [
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Container(
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decoration: BoxDecoration(
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border: Border.all(
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color: AppColors.textPrimary,
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width: 2,
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),
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borderRadius: BorderRadius.circular(12),
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),
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),
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Positioned(
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top: -2,
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left: -2,
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child: Container(
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width: 30,
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height: 30,
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decoration: BoxDecoration(
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border: Border(
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top: BorderSide(color: AppColors.primary, width: 4),
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left: BorderSide(color: AppColors.primary, width: 4),
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),
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),
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),
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),
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Positioned(
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top: -2,
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right: -2,
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child: Container(
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width: 30,
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height: 30,
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decoration: BoxDecoration(
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border: Border(
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top: BorderSide(color: AppColors.primary, width: 4),
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right: BorderSide(color: AppColors.primary, width: 4),
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),
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),
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),
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),
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Positioned(
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bottom: -2,
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left: -2,
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child: Container(
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width: 30,
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height: 30,
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decoration: BoxDecoration(
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border: Border(
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bottom: BorderSide(color: AppColors.primary, width: 4),
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left: BorderSide(color: AppColors.primary, width: 4),
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),
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),
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),
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),
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Positioned(
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bottom: -2,
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right: -2,
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child: Container(
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width: 30,
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height: 30,
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decoration: BoxDecoration(
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border: Border(
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bottom: BorderSide(color: AppColors.primary, width: 4),
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right: BorderSide(color: AppColors.primary, width: 4),
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),
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),
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),
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),
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],
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),
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),
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),
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Positioned(
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bottom: 120,
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left: 0,
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right: 0,
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child: Padding(
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padding: EdgeInsets.symmetric(horizontal: 32.0),
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child: Text(
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'Position the QR code within the frame to scan',
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textAlign: TextAlign.center,
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style: TextStyle(
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color: AppColors.surface,
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fontSize: 16,
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fontWeight: FontWeight.w500,
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),
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),
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),
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),
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Positioned(
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bottom: 50,
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left: 0,
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right: 0,
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: [
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Container(
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width: 60,
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height: 60,
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decoration: BoxDecoration(
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color: AppColors.surface.withOpacity(0.2),
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borderRadius: BorderRadius.circular(30),
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),
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child: IconButton(
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icon: Icon(
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Icons.photo_library,
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color: AppColors.surface,
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size: 28,
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),
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onPressed: _pickImageFromGallery,
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),
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),
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Container(
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width: 60,
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height: 60,
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decoration: BoxDecoration(
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color: AppColors.surface.withOpacity(0.2),
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borderRadius: BorderRadius.circular(30),
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),
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child: IconButton(
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icon: Icon(
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Icons.keyboard,
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color: AppColors.surface,
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size: 28,
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),
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onPressed: () {
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_showManualInputDialog();
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},
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),
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),
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],
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),
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),
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],
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),
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);
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}
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void _showManualInputDialog() {
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showDialog(
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context: context,
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builder: (context) {
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final TextEditingController controller = TextEditingController();
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return AlertDialog(
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title: const Text('Enter Code Manually'),
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content: TextField(
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controller: controller,
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decoration: const InputDecoration(
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hintText: 'Enter QR code or barcode',
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border: OutlineInputBorder(),
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),
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(context),
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child: const Text('Cancel'),
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),
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ElevatedButton(
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onPressed: () {
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if (controller.text.isNotEmpty) {
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Navigator.pop(context);
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_handleScanResult(controller.text);
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}
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},
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child: const Text('Submit'),
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),
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],
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);
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},
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);
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}
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void _handleScanResult(String result) {
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cameraController.stop();
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showDialog(
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context: context,
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barrierDismissible: false,
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builder: (context) => AlertDialog(
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title: const Text('QR Code Scanned!'),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text('Scanned content:', style: TextStyle(fontWeight: FontWeight.bold)),
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const SizedBox(height: 8),
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Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: AppColors.cardBackground,
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borderRadius: BorderRadius.circular(8),
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),
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child: SelectableText(
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result,
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style: const TextStyle(fontSize: 14),
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),
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),
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],
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),
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actions: [
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TextButton(
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onPressed: () {
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Navigator.pop(context);
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setState(() {
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_isProcessing = false;
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});
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cameraController.start();
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},
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child: const Text('Scan Again'),
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),
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ElevatedButton(
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onPressed: () {
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Navigator.pop(context);
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Navigator.pop(context);
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},
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child: const Text('Done'),
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),
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],
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),
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);
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}
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}
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