flutter_star_printer 1.1.0

Flutter plugin for using Star Micromics printers. Contains multiple functions to help format the receipt.

example/lib/main.dart

import 'dart:typed_data';
import 'dart:ui' as ui;

// import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter_star_printer/flutter_star_printer.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  GlobalKey _globalKey = new GlobalKey();
  bool isLoading = false;
  @override
  void initState() {
    super.initState();
  }

  Future<Uint8List> _capturePng() async {
    try {
      RenderRepaintBoundary boundary =
          _globalKey.currentContext.findRenderObject();
      ui.Image image = await boundary.toImage(pixelRatio: 3.0);
      ByteData byteData =
          await image.toByteData(format: ui.ImageByteFormat.png);
      final pngBytes = byteData.buffer.asUint8List();
      return pngBytes;
    } catch (e) {
      print(e);
      return Uint8List(0);
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Flutter Star Printer plugin example app'),
        ),
        body: Column(
          children: <Widget>[
            TextButton(
              onPressed: () async {
                List<PortInfo> list = await StarPrnt.portDiscovery(
                  StarPortType.All,
                );
                print(list);

                list.forEach((port) async {
                  print(port.portName);

                  if (port.portName.isNotEmpty) {
                    print(await StarPrnt.getStatus(
                      portName: port.portName,
                      modelName: port.modelName,
                    ));

                    PrintCommands commands = PrintCommands();
                    String raster = "        Star Clothing Boutique\n" +
                        "             123 Star Road\n" +
                        "           City, State 12345\n" +
                        "\n" +
                        "Date:MM/DD/YYYY          Time:HH:MM PM\n" +
                        "--------------------------------------\n" +
                        "SALE\n" +
                        "SKU            Description       Total\n" +
                        "300678566      PLAIN T-SHIRT     10.99\n" +
                        "300692003      BLACK DENIM       29.99\n" +
                        "300651148      BLUE DENIM        29.99\n" +
                        "300642980      STRIPED DRESS     49.99\n" +
                        "30063847       BLACK BOOTS       35.99\n" +
                        "\n" +
                        "Subtotal                        156.95\n" +
                        "Tax                               0.00\n" +
                        "--------------------------------------\n" +
                        "Total                           156.95\n" +
                        "--------------------------------------\n" +
                        "\n" +
                        "Charge\n" +
                        "156.95\n" +
                        "Visa XXXX-XXXX-XXXX-0123\n" +
                        "Refunds and Exchanges\n" +
                        "Within 30 days with receipt\n" +
                        "And tags attached\n";

                    commands.appendBitmapText(text: raster);

                    print(await StarPrnt.sendCommands(
                      portName: port.portName,
                      modelName: port.modelName,
                      printCommands: commands,
                    ));
                  }
                });
              },
              child: Text('Print from text'),
            ),
            TextButton(
              onPressed: () async {
                //FilePickerResult file = await FilePicker.platform.pickFiles();
                List<PortInfo> list = await StarPrnt.portDiscovery(
                  StarPortType.All,
                );

                print(list);
                list.forEach((port) async {
                  print(port.portName);

                  if (port.portName.isNotEmpty) {
                    print(await StarPrnt.getStatus(
                      portName: port.portName,
                      modelName: port.modelName,
                    ));

                    PrintCommands commands = PrintCommands();
                    commands.appendBitmap(
                      path:
                          'https://c8.alamy.com/comp/MPCNP1/camera-logo-design-photograph-logo-vector-icons-MPCNP1.jpg',
                    );

                    print(await StarPrnt.sendCommands(
                      portName: port.portName,
                      modelName: port.modelName,
                      printCommands: commands,
                    ));
                  }
                });
                setState(() {
                  isLoading = false;
                });
              },
              child: Text('Print from url'),
            ),
            SizedBox(
              width: 576, // 3'' only
              child: RepaintBoundary(
                key: _globalKey,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.start,
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: [
                    Text('This is a text to print as image , for 3\''),
                  ],
                ),
              ),
            ),
            TextButton(
              onPressed: () async {
                final img = await _capturePng();
                setState(() {
                  isLoading = true;
                });

                //FilePickerResult file = await FilePicker.platform.pickFiles();
                List<PortInfo> list = await StarPrnt.portDiscovery(
                  StarPortType.All,
                );
                print(list);

                list.forEach((port) async {
                  print(port.portName);
                  if (port.portName.isNotEmpty) {
                    print(await StarPrnt.getStatus(
                      portName: port.portName,
                      modelName: port.modelName,
                    ));

                    PrintCommands commands = PrintCommands();
                    commands.appendBitmapByte(
                      byteData: img,
                      diffusion: true,
                      bothScale: true,
                      alignment: StarAlignmentPosition.Left,
                    );

                    print(await StarPrnt.sendCommands(
                      portName: port.portName,
                      modelName: port.modelName,
                      printCommands: commands,
                    ));
                  }
                });
                setState(() {
                  isLoading = false;
                });
              },
              child: Text('Print from genrated image'),
            ),
          ],
        ),
      ),
    );
  }
}