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Tothemax Dev
232
lib/print/usb_printer_screen.dart
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232
lib/print/usb_printer_screen.dart
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import 'package:image/image.dart' as img;
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:max_print_plus/service/service.dart';
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import 'package:open_filex/open_filex.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:drago_pos_printer/drago_pos_printer.dart';
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import 'package:webcontent_converter/demo.dart';
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import 'package:webcontent_converter/webcontent_converter.dart';
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class USBPrinterScreen extends StatefulWidget {
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@override
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_USBPrinterScreenState createState() => _USBPrinterScreenState();
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}
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class _USBPrinterScreenState extends State<USBPrinterScreen> {
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bool _isLoading = false;
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List<USBPrinter> _printers = [];
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USBPrinterManager? _manager;
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List<int> _data = [];
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int paperWidth = 0;
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int charPerLine = 0;
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List<String> paperTypes = [];
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bool showCustom = false;
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@override
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void initState() {
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_scan();
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paperWidth = PaperSizeWidth.mm80;
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charPerLine = PaperSizeMaxPerLine.mm80;
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paperTypes.add('58mm');
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paperTypes.add('80mmOld');
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paperTypes.add('80mm');
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paperTypes.add('Custom');
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super.initState();
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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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appBar: AppBar(
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title: Text("USB Printer Screen"),
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),
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body: ListView(
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padding: EdgeInsets.all(20),
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children: [
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DropdownButtonHideUnderline(
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child: DropdownButtonFormField(
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decoration: InputDecoration(labelText: 'Paper Size'),
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items: paperTypes.map((item) {
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return DropdownMenuItem(
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value: item,
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child: Text(item),
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);
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}).toList(),
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onChanged: (String? selected) async {
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showCustom = false;
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if (selected != null) {
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if (selected == "58mm") {
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paperWidth = PaperSizeWidth.mm58;
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charPerLine = PaperSizeMaxPerLine.mm58;
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} else if (selected == "80mmOld") {
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paperWidth = PaperSizeWidth.mm80_Old;
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charPerLine = PaperSizeMaxPerLine.mm80_Old;
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} else if (selected == "80mm") {
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paperWidth = PaperSizeWidth.mm80;
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charPerLine = PaperSizeMaxPerLine.mm80;
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} else if (selected == "Custom") {
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paperWidth = PaperSizeWidth.mm80;
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charPerLine = PaperSizeMaxPerLine.mm80;
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showCustom = true;
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}
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setState(() {});
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}
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},
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),
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),
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if (showCustom)
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Row(
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children: [
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Expanded(
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child: TextFormField(
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initialValue: paperWidth.toString(),
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onChanged: (val) {
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if (val.isNotEmpty) {
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paperWidth = int.parse(val);
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} else
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paperWidth = 0;
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},
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)),
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SizedBox(width: 20),
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Expanded(
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child: TextFormField(
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initialValue: charPerLine.toString(),
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onChanged: (val) {
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if (val.isNotEmpty) {
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charPerLine = int.parse(val);
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} else
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charPerLine = 0;
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},
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))
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],
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),
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SizedBox(height: 10),
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..._printers
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.map((printer) => ListTile(
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title: Text("${printer.name}"),
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subtitle: Text("${printer.address}"),
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leading: Icon(Icons.usb),
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trailing: Wrap(
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children: [
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IconButton(
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tooltip: 'Tspl Command',
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onPressed: () => _tsplPrint(printer),
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icon: Icon(Icons.qr_code)),
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IconButton(
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tooltip: 'ESC POS Command',
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onPressed: () => _startPrinter(1, printer),
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icon: Icon(Icons.print)),
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IconButton(
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tooltip: 'Pdf',
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onPressed: () => _startPrinter(2, printer),
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icon: Icon(Icons.picture_as_pdf)),
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IconButton(
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tooltip: 'Html Print',
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onPressed: () => _startPrinter(3, printer),
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icon: Icon(Icons.image)),
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],
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),
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))
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.toList(),
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],
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),
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floatingActionButton: FloatingActionButton(
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child: _isLoading ? Icon(Icons.stop) : Icon(Icons.play_arrow),
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onPressed: _isLoading ? null : _scan,
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),
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);
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}
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_scan() async {
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setState(() {
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_isLoading = true;
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_printers = [];
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});
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var printers = await USBPrinterManager.discover();
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setState(() {
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_isLoading = false;
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_printers = printers;
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});
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}
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_startPrinter(int byteType, USBPrinter printer) async {
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var profile = await CapabilityProfile.load();
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var manager = USBPrinterManager(printer);
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_manager = manager;
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final content = Demo.getShortReceiptContent();
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var bytes = byteType == 1
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? await ESCPrinterService(null).getSamplePosBytes(
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paperSizeWidthMM: paperWidth,
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maxPerLine: charPerLine,
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profile: profile)
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: byteType == 2
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? await ESCPrinterService(null).getPdfBytes(
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paperSizeWidthMM: paperWidth,
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maxPerLine: charPerLine,
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profile: profile)
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: (await WebcontentConverter.contentToImage(
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content: content,
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executablePath: WebViewHelper.executablePath(),
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))
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.toList();
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List<int> data;
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if (byteType == 3) {
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var service = ESCPrinterService(Uint8List.fromList(bytes));
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data = await service.getBytes(
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paperSizeWidthMM: paperWidth,
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maxPerLine: charPerLine,
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);
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if (bytes.length > 0) {
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var dir = await getTemporaryDirectory();
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var path = dir.path + "\\receipt.jpg";
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File file = File(path);
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await file.writeAsBytes(bytes);
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}
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} else
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data = bytes;
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if (mounted) setState(() => _data = data);
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_manager!.writeBytes(_data);
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}
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_tsplPrint(USBPrinter printer) async {
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int width = 105;
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int height = 22;
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int labelWidth = 35;
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var image = await ESCPrinterService(null)
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.generateLabel(width, height, labelWidth, 1.5, 3);
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if (image != null) {
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var dir = await getTemporaryDirectory();
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var path = dir.path + "\\receipt.png";
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File file = File(path);
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await file.writeAsBytes(img.encodePng(image));
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OpenFilex.open(path);
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// for (int i = 1; i <= 1; i++) {
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// var manager = USBPrinterManager(printer);
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// TsplGenerator generator = TsplGenerator();
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// generator.addSize(width: width, height: height);
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// generator.addGap(3);
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// generator.addSpeed(4);
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// generator.addDensity(Density.density15);
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// generator.addDirection(Direction.backWord);
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// generator.addTear(Tear.on);
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// generator.addCodePageUtf8();
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// generator.addCls();
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// generator.addImage(image, needGrayscale: true);
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// generator.addPrint(1);
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// _data = generator.byte;
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// manager.writeBytes(_data);
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// }
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}
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}
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}
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