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fix print

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This commit is contained in:
Efril 2026-02-27 19:09:39 +07:00
parent 0bccec8a1e
commit f4cdfcb96f
3 changed files with 34 additions and 20 deletions
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4
lib/core/function/app_function.dart
View File

@ -31,10 +31,10 @@ Future<void> onPrint(
await PrinterLocalDatasource.instance.getPrinterByCode('checker');
final kitchenPrinter =
await PrinterLocalDatasource.instance.getPrinterByCode('kitchen');
final barPrinter =
await PrinterLocalDatasource.instance.getPrinterByCode('bar');
final receiptPrinter =
await PrinterLocalDatasource.instance.getPrinterByCode('receipt');
final barPrinter =
await PrinterLocalDatasource.instance.getPrinterByCode('bar');
if (receiptPrinter != null) {
try {

40
lib/core/utils/printer_service.dart
View File

@ -11,7 +11,7 @@ class PrinterService {
factory PrinterService() => _instance;
PrinterService._internal();
final Lock _lock = Lock();
final Map<String, Lock> _locks = {};
String? _connectedMac;
/// Connect to Bluetooth printer
@ -60,13 +60,15 @@ class PrinterService {
}
}
/// Print with automatic printer type detection
Lock _getLock(String address) {
return _locks.putIfAbsent(address, () => Lock());
}
Future<bool> printWithPrinter(
PrintModel printer, List<int> printData, BuildContext context) async {
if (printer.type == 'Bluetooth') {
return await _lock.synchronized(() async {
return await _getLock(printer.address).synchronized(() async {
try {
// Connect hanya kalau beda printer atau belum connected
bool isConnected = await PrintBluetoothThermal.connectionStatus;
if (!isConnected || _connectedMac != printer.address) {
if (isConnected) {
@ -84,25 +86,25 @@ class PrinterService {
return false;
}
_connectedMac = printer.address;
await Future.delayed(const Duration(milliseconds: 500));
await Future.delayed(
const Duration(milliseconds: 1000)); // naikkan dari 500ms
}
// Print
bool result = await PrintBluetoothThermal.writeBytes(printData);
bool result = await _writeBytesChunked(printData);
// Beri waktu printer flush sebelum job berikutnya
await Future.delayed(const Duration(milliseconds: 1000));
log("Print result ${printer.name}: $result");
return result;
} catch (e, stackTrace) {
_connectedMac = null;
FirebaseCrashlytics.instance.recordError(
e,
stackTrace,
FirebaseCrashlytics.instance.recordError(e, stackTrace,
reason: 'Error printing ${printer.name}',
information: [
'Printer: ${printer.name}',
'MAC: ${printer.address}'
],
);
log("Error printing ${printer.name}: $e");
]);
return false;
}
});
@ -111,6 +113,18 @@ class PrinterService {
}
}
// Kirim data per chunk untuk hindari buffer overflow Bluetooth
Future<bool> _writeBytesChunked(List<int> data, {int chunkSize = 512}) async {
for (int i = 0; i < data.length; i += chunkSize) {
final end = (i + chunkSize > data.length) ? data.length : i + chunkSize;
final chunk = data.sublist(i, end);
bool result = await PrintBluetoothThermal.writeBytes(chunk);
if (!result) return false;
await Future.delayed(const Duration(milliseconds: 30));
}
return true;
}
/// Print using Bluetooth printer
Future<bool> printBluetooth(List<int> printData) async {
try {

2
lib/data/dataoutputs/print_dataoutputs.dart
View File

@ -1831,7 +1831,7 @@ class PrintDataoutputs {
: '--------------------------------',
styles: const PosStyles(bold: false, align: PosAlign.center));
paper == 80 ? bytes += generator.feed(3) : bytes += generator.feed(1);
paper == 80 ? bytes += generator.feed(3) : bytes += generator.feed(2);
if (paper == 80) {
bytes += generator.cut();