wise_bluetooth_print 0.0.3

Socket timeout is added to keep socket open for longer for print operations for multiple labels. Timeout defaults to 100ms (as original) if no timeout value is passed.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:wise_bluetooth_print/classes/paired_device.dart';
import 'package:wise_bluetooth_print/wise_bluetooth_print.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late List<PairedDevice> _devices;

  @override
  void initState() {
    super.initState();
    _devices = <PairedDevice>[];
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    List<PairedDevice> devices = <PairedDevice>[];

    try {
      devices = await WiseBluetoothPrint.getPairedDevices();
    } on PlatformException {
      devices = <PairedDevice>[];
    }

    if (!mounted) return;

    setState(() {
      _devices = devices;
    });
  }

  void initPrint(BuildContext context, String deviceUUID) {
    // You can add more language options other than ZPL and BZPL/ZPL II for printers
    // that don't support them.
    String printTextZPL = "^XA"
        "^LH55,30"
        "^FO20,10^CFD,27,13^FDCompany Name^FS"
        "^FO20,60^AD^FD<DESCRIPTION >^FS"
        "^FO40,160^BY2,2.0^BCN,100,Y,N,N,N^FD<PART,-1>^FS"
        "^XZ";

    String printTextBZPL = "^XA"
        "^FO50,50^ADN,18,10,^FDCompany Name^FS"
        "^FO50,80^ADN,18,10,^FDCompany Address^FS"
        "^FO50,135^ADN,18,10,^FDExample text^FS"
        "^FO50,165^ADN,18,10,^FDMore example text^FS"
        "^FO50,220^ADN,18,10,^FD2022-09-01T16:36:35Z^FS"
        "^XZ";

    showDialog(
      context: context,
      builder: (builder) => AlertDialog(
        title: const Text("Select supported printer language"),
        content: const Text(
            "WARNING: On some printers, selecting an unsupported language first and then "
            "a supported one would cause the printer not to print at all, in which case "
            "you might have to restart your printer and try again."),
        actions: [
          TextButton(
            onPressed: () async {
              await WiseBluetoothPrint.print(deviceUUID, printTextZPL);
              Navigator.of(context).pop();
            },
            child: const Text("ZPL"),
          ),
          TextButton(
            onPressed: () async {
              await WiseBluetoothPrint.print(deviceUUID, printTextBZPL);
              Navigator.of(context).pop();
            },
            child: const Text("B-ZPL/ZPL II"),
          ),
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: const Text("Close", style: TextStyle(color: Colors.red)),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
      appBar: AppBar(
        title: const Text("Wise Bluetooth Print Plugin example"),
      ),
      body: Padding(
          padding: const EdgeInsets.fromLTRB(10, 0, 10, 0),
          child: ListView.builder(
              shrinkWrap: true,
              itemCount: _devices.length,
              itemBuilder: (context, index) {
                return GestureDetector(
                  onTap: () => initPrint(context, _devices[index].socketId),
                  child: Card(
                    elevation: 1,
                    shape: RoundedRectangleBorder(
                      borderRadius: BorderRadius.circular(5),
                    ),
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        ListTile(
                            title: Row(
                                mainAxisAlignment:
                                    MainAxisAlignment.spaceBetween,
                                children: [
                                  Text(_devices[index].name),
                                  Text(_devices[index].hardwareAddress)
                                ]),
                            subtitle: Text(_devices[index].socketId))
                      ],
                    ),
                  ),
                );
              })),
    ));
  }
}