sewoo_printer 0.0.3 sewoo_printer: ^0.0.3 copied to clipboard
A Flutter plugin to print price tags on Sewoo LK-P12 CPCL Printer.
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:sewoo_printer/printer_consts.dart';
import 'package:sewoo_printer/pricetag_layout.dart';
import 'package:sewoo_printer/pricetag_data.dart';
import 'package:sewoo_printer/printer_events.dart';
import 'package:sewoo_printer/sewoo_printer.dart';
import 'package:printing/printing.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String _platformVersion = 'Unknown';
@override
void initState() {
super.initState();
initPlatformState();
}
Future<void> initPlatformState() async {
String platformVersion;
try {
platformVersion = await SewooPrinter.platformVersion;
} on PlatformException {
platformVersion = 'Failed to get platform version.';
}
if (!mounted) return;
setState(() {
_platformVersion = platformVersion;
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: MyHomePage(title: 'Sewoo Printer CPCL'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final printerIP = '192.168.0.107';
final printerPort = 9100;
final printerDpi = PrinterConsts.dpi;
final _images = <ImageProvider>[];
SewooPrinter printer;
String _status = '';
bool _connected = false;
// Reading direction (down to up = left to right)
bool _downToUp = true;
PriceTagData _priceTag = PriceTagData(
barCode: 7896030822506,
codigo: 98765,
currency: 'R\$',
date: '01/08/2021',
description: 'COPO PLAST TRANSP PP 250ML',
price: 126.99,
promoPrice: 96.99,
promoPriceQuantity: 100
);
initializePrinter() {
SewooPrinter.listenEvents(( PrinterEvent event ) {
switch (event.name) {
case 'connect':
_onConnectionChanged(event.value);
break;
case 'status':
_onStatusChanged(event.value);
break;
default:
print('Evento não identificado');
break;
}
});
}
@override
void initState() {
initializePrinter();
SewooPrinter.connect(printerIP, printerPort);
_updateImages();
super.initState();
}
@override
void reassemble() {
initializePrinter();
SewooPrinter.connect(printerIP, printerPort);
_updateImages();
super.reassemble();
}
@override
void dispose() {
SewooPrinter.disconnect();
super.dispose();
}
_onConnectionChanged(bool isConnected) {
setState(() {
_connected = isConnected;
});
}
_onStatusChanged(String status) {
setState(() {
_status = status;
});
}
_connect() {
if (SewooPrinter.connected) {
SewooPrinter.disconnect();
} else {
SewooPrinter.connect(printerIP, printerPort);
}
}
_getPrinterStatus() async {
_status = await SewooPrinter.getStatus();
}
_printPriceTag() async {
_status = await SewooPrinter.printPriceTag(this._priceTag, this._downToUp);
}
void _updateImages() async {
_images.clear();
await for (
var page in Printing.raster(
PriceTagLayout.buildDocument(this._priceTag),
dpi: PrinterConsts.dpi)
) {
_images.add(PdfRasterImage(page));
}
setState(() {});
}
void _invertOrientation() {
setState(() {
_downToUp = !_downToUp;
});
_updateImages();
print(_downToUp);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
actions: [
IconButton(
icon: Opacity(
opacity: _connected ? 1 : .5,
child: Icon(
Icons.wifi,
),
),
onPressed: _connect
),
IconButton(
icon: Icon(Icons.compare_arrows),
onPressed: () => {
_invertOrientation()
}
)
],
),
body: Center(
child: Container(
padding: const EdgeInsets.all(10.0),
child:Padding(
padding: const EdgeInsets.all(8.0),
child: ListView.builder(
itemCount: _images.length,
scrollDirection: Axis.vertical,
itemBuilder: (context, index) => Padding(
padding: EdgeInsets.symmetric(horizontal: 50.0), //50.0
child: Card(
elevation: 8,
child: RotatedBox(
//quarterTurns: 3,
quarterTurns: this._downToUp ? 2 : 0,
child: Image(
image: _images[index],
fit: BoxFit.contain,
),
)
),
),
),
)
),
),
floatingActionButton: Visibility(
//duration: Duration(milliseconds: 500),
//opacity: _connected ? 1.0 : 0.0,
visible: _connected,
child: FloatingActionButton.extended(
onPressed: _printPriceTag,
tooltip: 'Conectar',
label: Row(
children: [
Icon(Icons.print),
SizedBox(width: 8.0),
Text('Print'),
]),
)
)
);
}
}