pda_608_plugin 0.0.13

pda_608_plugin: ^0.0.13 copied to clipboard

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:pda_608_plugin/pda_608_plugin.dart';
import 'dart:typed_data';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(const Pda608TestApp());
}

class Pda608TestApp extends StatelessWidget {
  const Pda608TestApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PDA 608 Scanner & Printer',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: const PdaMainScreen(),
    );
  }
}

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

  @override
  _PdaMainScreenState createState() => _PdaMainScreenState();
}

class _PdaMainScreenState extends State<PdaMainScreen> {
  final _printTextController = TextEditingController();
  final _scanResultController = TextEditingController();

  bool _isInitialized = false;
  bool _isPrinting = false;
  String _statusMessage = 'Initializing...';
  String _lastError = '';

  @override
  void initState() {
    super.initState();
    _initializePlugin();

    // Listen for scan results
    Pda608Plugin.scanResults.listen(
          (result) {
        setState(() {
          _scanResultController.text = result.text;
          _statusMessage = 'Scan received: ${result.text}';
        });
      },
      onError: (error) {
        setState(() {
          _lastError = error.toString();
          _statusMessage = 'Scan error: $error';
        });
      },
    );
  }

  @override
  void dispose() {
    _printTextController.dispose();
    _scanResultController.dispose();
    _closePlugin();
    super.dispose();
  }

  Future<void> _initializePlugin() async {
    setState(() {
      _statusMessage = 'Initializing...';
    });

    try {
      final result = await Pda608Plugin.init();
      setState(() {
        _isInitialized = result;
        _statusMessage = result
            ? 'Device ready. Use hardware scan button.'
            : 'Failed to initialize device';
      });
    } catch (e) {
      setState(() {
        _isInitialized = false;
        _lastError = e.toString();
        _statusMessage = 'Error initializing: $e';
      });
    }
  }

  Future<void> _closePlugin() async {
    if (_isInitialized) {
      try {
        await Pda608Plugin.close();
      } catch (e) {
        debugPrint('Error closing plugin: $e');
      }
    }
  }

  Future<void> _printText() async {
    if (!_isInitialized) {
      setState(() {
        _statusMessage = 'Cannot print: Device not initialized';
      });
      return;
    }

    final text = _printTextController.text;
    if (text.isEmpty) {
      setState(() {
        _statusMessage = 'Please enter text to print';
      });
      return;
    }

    setState(() {
      _isPrinting = true;
      _statusMessage = 'Printing...';
      _lastError = '';
    });

    try {
      final result = await Pda608Plugin.printText(
        text: text,
        size: 1, // Normal size
        align: 1, // Center aligned
        paperWidth: 80, // 80mm paper width
        isLabel: false, // Not using label paper
        tear: true, // Auto tear
      );

      setState(() {
        _isPrinting = false;
        _statusMessage = result
            ? 'Text printed successfully'
            : 'Print failed, check printer';
      });
    } catch (e) {
      setState(() {
        _isPrinting = false;
        _lastError = e.toString();
        _statusMessage = 'Error printing: $e';
      });
    }
  }

  Future<void> _printQrCode() async {
    if (!_isInitialized) {
      setState(() {
        _statusMessage = 'Cannot print: Device not initialized';
      });
      return;
    }

    final text = _printTextController.text;
    if (text.isEmpty) {
      setState(() {
        _statusMessage = 'Please enter content for QR code';
      });
      return;
    }

    setState(() {
      _isPrinting = true;
      _statusMessage = 'Printing QR code...';
      _lastError = '';
    });

    try {
      final result = await Pda608Plugin.printQrCode(
        data: text,
        width: 300,
        height: 300,
        showText: true,
        fontSize: 16,
        align: 1,
        paperWidth: 80, // 80mm paper
        isLabel: false,
        tear: true,
      );

      setState(() {
        _isPrinting = false;
        _statusMessage = result
            ? 'QR code printed successfully'
            : 'QR code print failed';
      });
    } catch (e) {
      setState(() {
        _isPrinting = false;
        _lastError = e.toString();
        _statusMessage = 'Error printing QR code: $e';
      });
    }
  }

  Future<void> _printTestImage() async {
    print("_printTestImage function started");

    if (!_isInitialized) {
      setState(() {
        _statusMessage = 'Cannot print: Device not initialized';
      });
      return;
    }

    setState(() {
      _isPrinting = true;
      _statusMessage = 'Loading and printing image...';
      _lastError = '';
    });

    try {
      print("Loading test image from assets");

      // First try to load the image from assets
      final ByteData data = await rootBundle.load('assets/test_logo.png');
      print("Image loaded, size: ${data.lengthInBytes} bytes");

      final Uint8List imageData = data.buffer.asUint8List();

      print("Sending image to printer");
      final result = await Pda608Plugin.printImage(
        imageData: imageData,
        align: 1, // Center aligned
        paperWidth: 80, // 80mm paper width
        isLabel: false,
        tear: true,
      );

      setState(() {
        _isPrinting = false;
        _statusMessage = result
            ? 'Image printed successfully'
            : 'Image print failed, check printer';
      });
    } catch (e) {
      print("Error printing image: $e");

      // If image printing fails, try fallback to QR code
      print("Falling back to QR code for testing");
      try {
        final result = await Pda608Plugin.printQrCode(
          data: "IMAGE PRINT TEST FALLBACK",
          width: 200,
          height: 200,
          showText: true,
          fontSize: 24,
          align: 1,
          paperWidth: 80,
          isLabel: false,
          tear: true,
        );

        setState(() {
          _isPrinting = false;
          _lastError = 'Image printing failed, used QR code fallback';
          _statusMessage = result
              ? 'Fallback QR code printed successfully'
              : 'Printing failed';
        });
      } catch (e2) {
        setState(() {
          _isPrinting = false;
          _lastError = e.toString() + "\nFallback error: " + e2.toString();
          _statusMessage = 'All printing attempts failed';
        });
      }
    }
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('PDA 608 Scanner & Printer'),
        actions: [
          IconButton(
            icon: const Icon(Icons.refresh),
            onPressed: _isInitialized ? _initializePlugin : null,
            tooltip: 'Reinitialize device',
          ),
        ],
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            // Status card
            Card(
              color: _isInitialized ? Colors.green.shade50 : Colors.red.shade50,
              child: Padding(
                padding: const EdgeInsets.all(16.0),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Row(
                      children: [
                        Icon(
                          _isInitialized ? Icons.check_circle : Icons.error,
                          color: _isInitialized ? Colors.green : Colors.red,
                        ),
                        const SizedBox(width: 8),
                        Text(
                          'Status: ${_isInitialized ? 'Ready' : 'Not initialized'}',
                          style: const TextStyle(
                            fontWeight: FontWeight.bold,
                            fontSize: 16,
                          ),
                        ),
                      ],
                    ),
                    const SizedBox(height: 8),
                    Text(_statusMessage),
                    if (_lastError.isNotEmpty) ...[
                      const SizedBox(height: 8),
                      Text(
                        'Error: $_lastError',
                        style: const TextStyle(color: Colors.red),
                      ),
                    ],
                  ],
                ),
              ),
            ),

            const SizedBox(height: 24),

            // Scanner section
            Container(
              decoration: BoxDecoration(
                border: Border.all(color: Colors.blue.shade300),
                borderRadius: BorderRadius.circular(8),
              ),
              padding: const EdgeInsets.all(16.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      Icon(Icons.qr_code_scanner, color: Colors.blue.shade700),
                      const SizedBox(width: 8),
                      Text(
                        'Barcode Scanner',
                        style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                          color: Colors.blue.shade700,
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 16),
                  Container(
                    padding: const EdgeInsets.all(12),
                    decoration: BoxDecoration(
                      color: Colors.yellow.shade100,
                      borderRadius: BorderRadius.circular(8),
                      border: Border.all(color: Colors.orange),
                    ),
                    child: Row(
                      children: const [
                        Icon(Icons.info_outline, color: Colors.orange),
                        SizedBox(width: 8),
                        Expanded(
                          child: Text(
                            'Please use the hardware scan button on the side of the device to scan barcodes',
                            style: TextStyle(
                              fontWeight: FontWeight.bold,
                            ),
                          ),
                        ),
                      ],
                    ),
                  ),
                  const SizedBox(height: 16),
                  TextField(
                    controller: _scanResultController,
                    decoration: const InputDecoration(
                      labelText: 'Scan Result',
                      border: OutlineInputBorder(),
                      prefixIcon: Icon(Icons.qr_code),
                    ),
                    readOnly: true,
                    maxLines: 4,
                    minLines: 1,
                  ),
                  const SizedBox(height: 8),
                  Row(
                    mainAxisAlignment: MainAxisAlignment.end,
                    children: [
                      OutlinedButton.icon(
                        icon: const Icon(Icons.copy),
                        label: const Text('Copy Result'),
                        onPressed: _scanResultController.text.isEmpty
                            ? null
                            : () {
                          Clipboard.setData(ClipboardData(
                            text: _scanResultController.text,
                          ));
                          ScaffoldMessenger.of(context).showSnackBar(
                            const SnackBar(
                              content: Text('Copied to clipboard'),
                            ),
                          );
                        },
                      ),
                      const SizedBox(width: 8),
                      OutlinedButton.icon(
                        icon: const Icon(Icons.clear),
                        label: const Text('Clear'),
                        onPressed: _scanResultController.text.isEmpty
                            ? null
                            : () {
                          setState(() {
                            _scanResultController.clear();
                          });
                        },
                      ),
                    ],
                  ),
                ],
              ),
            ),

            const SizedBox(height: 24),

            // Printer section
            Container(
              decoration: BoxDecoration(
                border: Border.all(color: Colors.green.shade300),
                borderRadius: BorderRadius.circular(8),
              ),
              padding: const EdgeInsets.all(16.0),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      Icon(Icons.print, color: Colors.green.shade700),
                      const SizedBox(width: 8),
                      Text(
                        'Thermal Printer (80mm)',
                        style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                          color: Colors.green.shade700,
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 16),
                  TextField(
                    controller: _printTextController,
                    decoration: const InputDecoration(
                      labelText: 'Text to Print',
                      border: OutlineInputBorder(),
                      hintText: 'Enter text to print...',
                    ),
                    maxLines: 5,
                    enabled: _isInitialized && !_isPrinting,
                  ),
                  const SizedBox(height: 16),
                  Row(
                    children: [
                      Expanded(
                        child: ElevatedButton.icon(
                          icon: const Icon(Icons.print),
                          label: const Text('Print Text'),
                          onPressed: (!_isInitialized || _isPrinting) ? null : _printText,
                          style: ElevatedButton.styleFrom(
                            padding: const EdgeInsets.symmetric(vertical: 12),
                            backgroundColor: Colors.green,
                          ),
                        ),
                      ),
                      const SizedBox(width: 8),
                      Expanded(
                        child: ElevatedButton.icon(
                          icon: const Icon(Icons.qr_code),
                          label: const Text('Print as QR'),
                          onPressed: (!_isInitialized || _isPrinting) ? null : _printQrCode,
                          style: ElevatedButton.styleFrom(
                            padding: const EdgeInsets.symmetric(vertical: 12),
                            backgroundColor: Colors.green.shade700,
                          ),
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 8),
                  ElevatedButton.icon(
                    icon: const Icon(Icons.image),
                    label: const Text('Print Test Image'),
                    onPressed: (!_isInitialized || _isPrinting)
                        ? null
                        : () {
                      print("Print Test Image button pressed"); // Debug output
                      _printTestImage();
                    },
                    style: ElevatedButton.styleFrom(
                      padding: const EdgeInsets.symmetric(vertical: 12),
                      backgroundColor: Colors.blue.shade700,
                      minimumSize: const Size(double.infinity, 48),
                    ),
                  ),                ],
              ),
            ),
          ],
        ),
      ),
    );
  }
}