rongta_printer 0.0.3
rongta_printer: ^0.0.3 copied to clipboard
A Flutter plugin to help developers to integrate with Rongta printers SDK.
import 'dart:developer';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:rongta_printer/core/enums.dart';
import 'package:rongta_printer/rongta_printer.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({super.key});
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
PrinterConnectionStatus connectionStatus = PrinterConnectionStatus.initial;
PrinterOperationStatus operationStatus = PrinterOperationStatus.idle;
final _rongtaPrinterPlugin = RongtaPrinter();
@override
void initState() {
super.initState();
initRongtaPlugin();
}
void onConnectionStatusChanged(PrinterConnectionStatus status) {
log(connectionStatus.name, name: 'onConnectionStatusChanged');
setState(() {
connectionStatus = status;
});
}
void onOperationStatusChanged(PrinterOperationStatus status) {
log(operationStatus.name, name: 'onOperationStatusChanged');
setState(() {
operationStatus = status;
});
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initRongtaPlugin() async {
try {
WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
connectionStatus = PrinterConnectionStatus.loading;
log(connectionStatus.name, name: 'initRongtaPlugin');
setState(() {});
});
await _rongtaPrinterPlugin.init(
macAddress: 'DC:0D:30:95:39:A2',
onPrinterConnectionChange: onConnectionStatusChanged,
onDocPrinted: onOperationStatusChanged,
);
} on PlatformException {
log(
'Unable to initialize the rongta printer plugin',
name: 'initRongtaPlugin',
);
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
}
Widget? connectionStatusWidget() {
switch (connectionStatus) {
case PrinterConnectionStatus.initial:
return null;
case PrinterConnectionStatus.loading:
return const CircularProgressIndicator();
case PrinterConnectionStatus.connected:
return const Icon(
Icons.check_circle,
color: Colors.green,
);
case PrinterConnectionStatus.disconnected:
return const Icon(
Icons.error,
color: Colors.red,
);
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Rongta printer example'),
),
body: Column(
children: [
ListTile(
title: const Text('Printer connection status'),
subtitle: Text(connectionStatus.name),
trailing: connectionStatusWidget(),
),
ListTile(
title: const Text('Printer operation status'),
subtitle: Text(operationStatus.name),
),
ElevatedButton(
onPressed: connectionStatus == PrinterConnectionStatus.connected
? () {
_rongtaPrinterPlugin.print(
context,
doc: const Column(
children: [
FlutterLogo(),
Text('Rongta printing example'),
],
),
);
}
: null,
child: const Text('Print a test doc'),
),
],
),
),
);
}
}