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impression a distance

master
Stephane 4 months ago
parent
5218acb5aa
commit
2ab6254576
2 changed files with 310 additions and 0 deletions
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  1. 305
      lib/pages/printer_page.dart
  2. 5
      pubspec.yaml

305
lib/pages/printer_page.dart
View File

@ -0,0 +1,305 @@
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'dart:io';
import 'dart:convert';
class PrinterPage extends StatefulWidget {
const PrinterPage({super.key});
@override
_PrinterPageState createState() => _PrinterPageState();
}
class _PrinterPageState extends State<PrinterPage> {
static const String printerIP = '192.168.123.251';
static const int printerPort = 9100;
bool _isPrinting = false;
bool _isConnected = false;
bool _isTestingConnection = false;
String _statusMessage = 'Non testé';
@override
void initState() {
super.initState();
_testConnection();
}
Future<void> _testConnection() async {
setState(() {
_isTestingConnection = true;
_statusMessage = 'Test en cours...';
});
try {
final socket = await Socket.connect(
printerIP,
printerPort,
).timeout(const Duration(seconds: 5));
await socket.close();
setState(() {
_isConnected = true;
_statusMessage = 'Connectée';
_isTestingConnection = false;
});
} catch (e) {
setState(() {
_isConnected = false;
_statusMessage = 'Erreur: $e';
_isTestingConnection = false;
});
}
}
Future<bool> _printReceipt() async {
try {
final socket = await Socket.connect(printerIP, printerPort);
final List<int> bytes = [];
// Initialisation ESC/POS
bytes.addAll([0x1B, 0x40]); // ESC @
// Titre centré et agrandi
bytes.addAll([0x1B, 0x61, 0x01]); // Centre
bytes.addAll([0x1D, 0x21, 0x11]); // Taille double
bytes.addAll(utf8.encode('REÇU DE VENTE'));
bytes.addAll([0x0A, 0x0A]);
// Retour taille normale
bytes.addAll([0x1D, 0x21, 0x00]);
bytes.addAll([0x1B, 0x61, 0x00]); // Alignement gauche
// Informations transaction
final now = DateTime.now();
final dateStr =
'${now.day.toString().padLeft(2, '0')}/${now.month.toString().padLeft(2, '0')}/${now.year} ${now.hour.toString().padLeft(2, '0')}:${now.minute.toString().padLeft(2, '0')}';
bytes.addAll(utf8.encode('Date: $dateStr\n'));
bytes.addAll(utf8.encode('Caissier: Admin\n'));
bytes.addAll(utf8.encode('--------------------------------\n'));
// En-têtes colonnes
bytes.addAll(utf8.encode('Article Qte Prix\n'));
bytes.addAll(utf8.encode('--------------------------------\n'));
// Articles
bytes.addAll(utf8.encode('Produit 1 2 25.00€\n'));
bytes.addAll(utf8.encode('Produit 2 1 15.50€\n'));
bytes.addAll(utf8.encode('--------------------------------\n'));
// Total
bytes.addAll([0x1B, 0x45, 0x01]); // Gras ON
bytes.addAll(utf8.encode('TOTAL 40.50€\n'));
bytes.addAll([0x1B, 0x45, 0x00]); // Gras OFF
bytes.addAll([0x0A, 0x0A]);
// Message de remerciement centré
bytes.addAll([0x1B, 0x61, 0x01]); // Centre
bytes.addAll(utf8.encode('Merci de votre visite !\n'));
bytes.addAll([0x0A, 0x0A]);
// Coupe papier
bytes.addAll([0x1D, 0x56, 0x00]); // GS V 0
// Envoi des données
socket.add(bytes);
await socket.flush();
await socket.close();
return true;
} catch (e) {
if (kDebugMode) {
print('Erreur impression: $e');
}
return false;
}
}
Future<void> _handlePrint() async {
setState(() => _isPrinting = true);
final success = await _printReceipt();
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(
success ? 'Impression réussie!' : 'Échec de l\'impression',
),
backgroundColor: success ? Colors.green : Colors.red,
duration: const Duration(seconds: 3),
),
);
setState(() => _isPrinting = false);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Imprimante POS'),
backgroundColor: Colors.blue,
foregroundColor: Colors.white,
),
body: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
// Status de connexion
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Status de l\'imprimante',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 10),
Row(
children: [
if (_isTestingConnection)
const SizedBox(
width: 20,
height: 20,
child: CircularProgressIndicator(strokeWidth: 2),
)
else
Icon(
_isConnected ? Icons.wifi : Icons.wifi_off,
color: _isConnected ? Colors.green : Colors.red,
size: 20,
),
const SizedBox(width: 10),
Expanded(
child: Text(
'IP: $printerIP:$printerPort\nStatus: $_statusMessage',
style: const TextStyle(fontSize: 14),
),
),
],
),
const SizedBox(height: 10),
ElevatedButton.icon(
onPressed: _isTestingConnection ? null : _testConnection,
icon: const Icon(Icons.refresh),
label: const Text('Tester la connexion'),
),
],
),
),
),
const SizedBox(height: 20),
// Aperçu du reçu
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Aperçu du reçu',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 10),
Container(
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
borderRadius: BorderRadius.circular(4),
color: Colors.grey[50],
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
const Text(
'REÇU DE VENTE',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 10),
Align(
alignment: Alignment.centerLeft,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Date: ${DateTime.now().toString().substring(0, 16)}',
),
const Text('Caissier: Admin'),
const Text('--------------------------------'),
const Text('Article Qte Prix'),
const Text('--------------------------------'),
const Text('Produit 1 2 25.00€'),
const Text('Produit 2 1 15.50€'),
const Text('--------------------------------'),
const Text(
'TOTAL 40.50€',
style: TextStyle(fontWeight: FontWeight.bold),
),
],
),
),
const SizedBox(height: 10),
const Text('Merci de votre visite !'),
],
),
),
],
),
),
),
const SizedBox(height: 20),
// Bouton d'impression
ElevatedButton.icon(
onPressed:
(_isConnected && !_isPrinting && !_isTestingConnection)
? _handlePrint
: null,
icon:
_isPrinting
? const SizedBox(
width: 20,
height: 20,
child: CircularProgressIndicator(
strokeWidth: 2,
valueColor: AlwaysStoppedAnimation<Color>(
Colors.white,
),
),
)
: const Icon(Icons.print),
label: Text(_isPrinting ? 'Impression...' : 'Imprimer le reçu'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 15),
textStyle: const TextStyle(fontSize: 16),
),
),
if (!_isConnected && !_isTestingConnection)
const Padding(
padding: EdgeInsets.only(top: 10),
child: Text(
'Vérifiez que l\'imprimante est allumée et connectée au réseau',
style: TextStyle(color: Colors.orange, fontSize: 12),
textAlign: TextAlign.center,
),
),
],
),
),
);
}
}

5
pubspec.yaml
View File

@ -27,6 +27,8 @@ dependencies:
share_plus: ^7.2.1
permission_handler: ^11.1.0
intl: ^0.18.1
esc_pos_printer: ^4.1.0
esc_pos_utils: ^1.1.0
# Dépendances de développement/test
dev_dependencies:
@ -34,6 +36,9 @@ dev_dependencies:
sdk: flutter
flutter_lints: ^3.0.1
dependency_overrides:
image: ^4.1.0
# Paramètres spécifiques à Flutter
flutter:
uses-material-design: true

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