d1_terminal_plugin 0.0.1

This plugin for D1 Terminal allows you to control the printer and LCD screen.

example/lib/main.dart

import 'dart:async';

import 'package:d1_terminal_plugin/d1_terminal_plugin.dart';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    const imageUrl = 'https://picsum.photos/250?image=9';
    const imageAsset = 'assets/flutter_logo.jpg';
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Row(
          children: [
            Expanded(
              child: Column(
                children: [
                  const Text(
                    'Printer',
                    style: TextStyle(fontSize: 14),
                  ),
                  ElevatedButton(
                    onPressed: () async {
                      final result = await D1TerminalPlugin.instance.getPrinterStatus();
                      _showMessage(context, result == null ? 'None' : result.name);
                    },
                    child: const Text('Get Printer Status'),
                  ),
                  ElevatedButton(
                    onPressed: () async {
                      final result = await D1TerminalPlugin.instance.isPrinterCoverOpen();
                      _showMessage(context, 'isPrinterCoverOpen: $result');
                    },
                    child: const Text('Get Printer Cover Status'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.printText(text: 'Siparişim+');
                      D1TerminalPlugin.instance.printSpace(1);
                      D1TerminalPlugin.instance.printStart();
                    },
                    child: const Text('Print Text'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.cutPaper();
                    },
                    child: const Text('Cut'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.lineFeed(5);
                    },
                    child: const Text('Line Feed'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.printBarCode(
                        text: '120102012',
                        symbology: D1BarcodeCodeSystem.CODABAR,
                      );
                      D1TerminalPlugin.instance.printStart();
                    },
                    child: const Text('Print Barcode'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.printQRCode(text: 'Siparişim', size: 2, align: D1TextAlign.center);
                      D1TerminalPlugin.instance.printSpace(4);
                      D1TerminalPlugin.instance.printStart();
                    },
                    child: const Text('print QR Code'),
                  ),
                ],
              ),
            ),
            Expanded(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                children: <Widget>[
                  const Text(
                    'LCD',
                    style: TextStyle(fontSize: 14),
                  ),
                  ElevatedButton(
                    onPressed: () => D1TerminalPlugin.instance.showText('Hello World', D1TextAlign.start),
                    child: const Text('Show Text'),
                  ),
                  ElevatedButton(
                    onPressed: () {
                      D1TerminalPlugin.instance.showQRScan.call().then((value) {
                        debugPrint('QR: $value');
                        _showMessage(context, 'QR: $value');
                        D1TerminalPlugin.instance.showText('QR: $value', D1TextAlign.center);
                      }).onError((error, stackTrace) {
                        _showMessage(context, 'Time Out', Colors.red);
                      });
                    },
                    child: const Text('Scan'),
                  ),
                  ElevatedButton(
                    onPressed: D1TerminalPlugin.instance.openScreen,
                    child: const Text('Open Screen'),
                  ),
                  ElevatedButton(
                    onPressed: D1TerminalPlugin.instance.closeScreen,
                    child: const Text('Close Screen'),
                  ),
                  ElevatedButton(
                    onPressed: () => D1TerminalPlugin.instance.showQRCode('QR Code'),
                    child: const Text('Show QR Code'),
                  ),
                  ElevatedButton(
                    onPressed: () async {
                      D1TerminalPlugin.instance.showImageUrl(imageUrl);
                    },
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        SizedBox.square(
                          dimension: 50,
                          child: Image.network(imageUrl),
                        ),
                        const SizedBox(width: 15),
                        const Text('Show Image'),
                      ],
                    ),
                  ),
                  ElevatedButton(
                    onPressed: () async {
                      D1TerminalPlugin.instance.showImageAsset(imageAsset);
                    },
                    child: Row(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        SizedBox.square(
                          dimension: 50,
                          child: Image.asset(imageAsset),
                        ),
                        const SizedBox(width: 15),
                        const Text('Show Asset'),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  void _showMessage(BuildContext context, String value, [Color? color]) {
    ScaffoldMessenger.of(context).hideCurrentMaterialBanner();
    ScaffoldMessenger.of(context).showMaterialBanner(
      MaterialBanner(
        padding: const EdgeInsets.only(),
        content: Text(value),
        leading: const Icon(Icons.qr_code),
        backgroundColor: color ?? Colors.green,
        actions: <Widget>[
          TextButton(
            onPressed: () => ScaffoldMessenger.of(context).hideCurrentMaterialBanner(),
            child: const Text('DISMISS'),
          ),
        ],
      ),
    );
  }
}