dollar_starxpand 0.0.1

Star Micronics SDK for Dollar POS

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:dollar_starxpand/dollar_starxpand.dart';

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

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

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

class _MyAppState extends State<MyApp> {
  // VARIABLES

  final _dollarStarxpandPlugin = DollarStarxpand();
  List<Map<String, dynamic>> discoveredPrinters = [];
  bool isDiscovering = false;

  @override
  void initState() {
    super.initState();
    setupPrinterDiscoveryListener();
  }

  void startDiscovery() {
    setState(() {
      isDiscovering = true;
      discoveredPrinters.clear(); // Clear the previous discovery results
    });

    _dollarStarxpandPlugin.startDiscovery().then((_) {
      setState(() {
        isDiscovering = false;
      });
    }).catchError((error) {
      setState(() {
        isDiscovering = false;
      });

      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Discovery failed: $error')),
      );
    });
  }

  void setupPrinterDiscoveryListener() {
    // Listen for printer discovery events
    _dollarStarxpandPlugin.onPrinterDiscovered((identifier, interfaceType) {
      setState(() {
        discoveredPrinters
            .add({"identifier": identifier, "interface": interfaceType});
      });
    });
  }

  void connectToPrinter(String identifier, String interface) {
    _dollarStarxpandPlugin.connectPrinter(identifier, interface).then((_) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Connected to printer: $identifier')),
      );
    }).catchError((error) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Failed to connect: $error')),
      );
    });
  }

  static const platform = MethodChannel('dollar_starxpand');

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Printer Example'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Padding(
                padding: const EdgeInsets.all(16.0),
                child: ElevatedButton(
                  onPressed: isDiscovering
                      ? null
                      : startDiscovery, // Disable the button while discovering
                  child: isDiscovering
                      ? const CircularProgressIndicator(
                          valueColor:
                              AlwaysStoppedAnimation<Color>(Colors.white),
                        )
                      : const Text('Discover Printers'),
                ),
              ),
              Expanded(
                child: Center(
                  child: discoveredPrinters.isEmpty
                      ? const Text(
                          'No printers found. Press "Discover Printers" to search.')
                      : ListView.builder(
                          itemCount: discoveredPrinters.length,
                          itemBuilder: (context, index) {
                            final identifier =
                                discoveredPrinters[index]["identifier"];
                            final interface =
                                discoveredPrinters[index]["interface"];
                            return InkWell(
                              child: ListTile(
                                leading:
                                    const Icon(Icons.print), // Printer icon
                                title: Text('Identifier: $identifier'),
                                subtitle: const Text(
                                    'Tap to connect, press print icon to print'),
                                trailing: Row(
                                  mainAxisSize: MainAxisSize.min,
                                  children: [
                                    IconButton(
                                      icon: const Icon(Icons.print,
                                          size: 40.0), // Print icon
                                      onPressed: () => _dollarStarxpandPlugin
                                          .printDocument(identifier),
                                    ),
                                    IconButton(
                                        icon: const Icon(Icons.dashboard,
                                            size: 40.0), // Print icon
                                        onPressed: () => _dollarStarxpandPlugin
                                            .openCashDrawer(
                                                identifier, interface)),
                                  ],
                                ),

                                onTap: () =>
                                    connectToPrinter(identifier, interface),
                              ),
                            );
                          },
                        ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}