ntbp_plugin 2.0.0 
ntbp_plugin: ^2.0.0 copied to clipboard
A comprehensive Flutter plugin for thermal Bluetooth label printing with advanced features including gap detection, precise positioning, and support for multiple label formats.
import 'package:flutter/material.dart';
import 'package:ntbp_plugin/ntbp_plugin.dart';
import 'package:permission_handler/permission_handler.dart';
import 'dart:collection';
// Import the BluetoothDevice type from the models
import 'package:ntbp_plugin/models/bluetooth_device.dart';
void main() {
runApp(const NtbpExampleApp());
}
class NtbpExampleApp extends StatelessWidget {
const NtbpExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'NTBP Plugin Example - Enhanced Bluetooth',
theme: ThemeData(
primarySwatch: Colors.blue,
useMaterial3: true,
),
home: const NtbpExamplePage(),
);
}
}
class NtbpExamplePage extends StatefulWidget {
const NtbpExamplePage({super.key});
@override
State<NtbpExamplePage> createState() => _NtbpExamplePageState();
}
class _NtbpExamplePageState extends State<NtbpExamplePage> {
final NtbpPlugin _ntbpPlugin = NtbpPlugin();
bool _isInitialized = false;
bool _isDiscovering = false;
List<BluetoothDevice> _availableDevices = [];
BluetoothDevice? _connectedDevice;
final Map<String, String> _devicePairingStatus = {};
// Queue management for multiple connections
final Queue<BluetoothDevice> _connectionQueue = Queue<BluetoothDevice>();
bool _isProcessingQueue = false;
String _queueStatus = 'Ready';
// Controllers for label configuration
final TextEditingController _widthController = TextEditingController();
final TextEditingController _heightController = TextEditingController();
final TextEditingController _copiesController = TextEditingController();
final TextEditingController _textSizeController = TextEditingController();
final TextEditingController _qrDataController = TextEditingController();
final TextEditingController _textData1Controller = TextEditingController(); // Customer name
final TextEditingController _textData2Controller = TextEditingController(); // Drop point
final TextEditingController _textData3Controller = TextEditingController(); // Additional info
// Multiple labels data
final List<Map<String, String>> _multipleLabelsData = [];
final TextEditingController _multipleLabelsController = TextEditingController();
// Protocol selection
String _selectedProtocol = 'Auto-Detect';
final List<String> _availableProtocols = [
'Auto-Detect',
'TSPL (N41)',
'ESC/POS (TSPL Forced)',
];
@override
void initState() {
super.initState();
// Initialize controllers
_widthController.text = '75';
_heightController.text = '60'; // Increased height for 2 text lines
_copiesController.text = '1';
_textSizeController.text = '9';
_qrDataController.text = 'TEST_QR_001';
_textData1Controller.text = 'Cust: Nashon Israel';
_textData2Controller.text = 'Drp: Mwanza';
_textData3Controller.text = 'Ref: 12345';
// Initialize plugin after a short delay to ensure Scaffold is ready
WidgetsBinding.instance.addPostFrameCallback((_) {
_initializePlugin();
});
}
@override
void didChangeDependencies() {
super.didChangeDependencies();
// Don't call _initializePlugin here anymore
}
void _setupSampleData() {
_widthController.text = '75';
_heightController.text = '60'; // Increased height for 2 text lines
_copiesController.text = '1';
_textSizeController.text = '9';
_qrDataController.text = 'XYZ185EVT';
_textData1Controller.text = 'Cust: Emanuel Tarimo';
_textData2Controller.text = 'Drp: Mbeya';
_textData3Controller.text = 'Ref: 67890';
}
void _setupSampleMultipleLabels() {
setState(() {
_multipleLabelsData.clear();
_multipleLabelsData.addAll([
{
'qrData': 'XYZ185EVT',
'textData1': 'Cust: Nashon Israel',
'textData2': 'Drp: Mwanza',
'textData3': 'Ref: 11111',
},
{
'qrData': 'XYZ186HYW',
'textData1': 'Cust: Emanuel Tarimo',
'textData2': 'Drp: Mbeya',
'textData3': 'Ref: 22222',
},
{
'qrData': 'XYZ187ABC',
'textData1': 'Cust: John Doe',
'textData2': 'Drp: Dar es Salaam',
'textData3': 'Ref: 33333',
},
]);
});
_showMessage('π Loaded sample multiple labels data');
}
Future<void> _initializePlugin() async {
try {
_showMessage('π Starting plugin initialization...');
// Request Bluetooth permissions first
_showMessage('π Requesting Bluetooth permissions...');
await _requestPermissions();
// For now, let's assume Bluetooth is available to enable basic functionality
// We'll handle actual Bluetooth checks when needed
setState(() {
_isInitialized = true;
});
_showMessage('β
NTBP Plugin initialized successfully');
_showMessage('β
Ready for Bluetooth operations');
} catch (e) {
_showMessage('β Failed to initialize plugin: $e');
// Set as initialized anyway to allow basic functionality
setState(() {
_isInitialized = true;
});
}
}
Future<void> _requestPermissions() async {
try {
_showMessage('π Requesting Bluetooth permissions...');
// Request Bluetooth permissions
Map<Permission, PermissionStatus> statuses = await [
Permission.bluetooth,
Permission.bluetoothConnect,
Permission.bluetoothScan,
Permission.location,
].request();
// Check if all permissions are granted
bool allGranted = true;
statuses.forEach((permission, status) {
_showMessage('π Permission ${permission.toString()}: $status');
if (!status.isGranted) {
allGranted = false;
}
});
if (allGranted) {
_showMessage('β
All Bluetooth permissions granted');
} else {
_showMessage('β οΈ Some permissions not granted');
}
} catch (e) {
_showMessage('β Error requesting permissions: $e');
}
}
Future<void> _startDiscovery() async {
try {
setState(() {
_isDiscovering = true;
_availableDevices.clear();
});
_showMessage('π Starting Bluetooth discovery...');
// Use NTBP plugin for device discovery
// Start scanning first
await _ntbpPlugin.startScan();
// Wait for discovery to complete
await Future.delayed(const Duration(seconds: 10));
// Get scan results
final devices = await _ntbpPlugin.getDiscoveredDevices();
if (devices.isNotEmpty) {
setState(() {
_availableDevices = devices;
});
_showMessage('β
Found ${devices.length} Bluetooth devices');
// Check pairing status for each device
for (final device in devices) {
if (device.address != null) {
try {
final pairingStatus = await _ntbpPlugin.checkDevicePairingStatus(device.address!);
_devicePairingStatus[device.address!] = pairingStatus;
} catch (e) {
_devicePairingStatus[device.address!] = 'UNKNOWN';
}
}
}
} else {
_showMessage('β οΈ No Bluetooth devices found');
}
} catch (e) {
_showMessage('β Discovery error: $e');
} finally {
setState(() {
_isDiscovering = false;
});
}
}
Future<void> _stopDiscovery() async {
try {
await _ntbpPlugin.stopScan();
_showMessage('βΉοΈ Discovery stopped');
} catch (e) {
_showMessage('β Error stopping discovery: $e');
}
}
Future<void> _connectToDevice(BluetoothDevice device) async {
try {
_showMessage('π Connecting to ${device.name ?? 'Unknown Device'}...');
// Add to connection queue
_addToConnectionQueue(device);
// Process queue
await _processConnectionQueue();
} catch (e) {
_showMessage('β Connection error: $e');
}
}
void _addToConnectionQueue(BluetoothDevice device) {
if (!_connectionQueue.contains(device)) {
_connectionQueue.add(device);
_showMessage('β Added ${device.name ?? 'Unknown Device'} to connection queue');
}
}
Future<void> _processConnectionQueue() async {
if (_isProcessingQueue || _connectionQueue.isEmpty) return;
setState(() {
_isProcessingQueue = true;
_queueStatus = 'Processing...';
});
while (_connectionQueue.isNotEmpty) {
final device = _connectionQueue.removeFirst();
try {
_showMessage('π Processing connection to ${device.name ?? 'Unknown Device'}...');
// Try NTBP plugin connection first
bool connected = false;
try {
connected = await _ntbpPlugin.connectToDevice(device);
} catch (e) {
_showMessage('β οΈ NTBP connection failed, trying alternative method: $e');
// Could implement alternative connection method here
}
if (connected) {
setState(() {
_connectedDevice = device;
});
_showMessage('β
Connected to ${device.name ?? 'Unknown Device'}');
// Auto-detect protocol for this device
await _autoDetectProtocol(device);
break; // Exit queue processing after successful connection
} else {
_showMessage('β Failed to connect to ${device.name ?? 'Unknown Device'}');
}
// Wait before next connection attempt
await Future.delayed(const Duration(seconds: 2));
} catch (e) {
_showMessage('β Error connecting to ${device.name ?? 'Unknown Device'}: $e');
}
}
setState(() {
_isProcessingQueue = false;
_queueStatus = 'Ready';
});
}
Future<void> _autoDetectProtocol(BluetoothDevice device) async {
try {
final deviceName = device.name?.toLowerCase() ?? '';
if (deviceName.contains('n41') || deviceName.contains('tspl')) {
setState(() {
_selectedProtocol = 'TSPL (N41)';
});
_showMessage('π Auto-detected: TSPL Protocol');
} else if (deviceName.contains('kt58l') || deviceName.contains('romeson') || deviceName.contains('esc/pos')) {
setState(() {
_selectedProtocol = 'ESC/POS (TSPL Forced)';
});
_showMessage('π Auto-detected: ESC/POS Protocol (TSPL Forced)');
} else {
setState(() {
_selectedProtocol = 'Auto-Detect';
});
_showMessage('π Protocol: Auto-Detect (will determine at print time)');
}
} catch (e) {
_showMessage('β οΈ Could not auto-detect protocol: $e');
}
}
Future<void> _disconnect() async {
try {
// Disconnect from NTBP plugin
await _ntbpPlugin.disconnect();
setState(() {
_connectedDevice = null;
});
_showMessage('π Disconnected from device');
} catch (e) {
_showMessage('β Failed to disconnect: $e');
}
}
Future<void> _printSingleLabel() async {
try {
if (_connectedDevice == null) {
_showMessage('β Please connect to a printer first');
return;
}
final width = double.tryParse(_widthController.text) ?? 75.0;
final height = double.tryParse(_heightController.text) ?? 50.0;
final copies = int.tryParse(_copiesController.text) ?? 1;
final textSize = int.tryParse(_textSizeController.text) ?? 9;
final qrData = _qrDataController.text.isNotEmpty ? _qrDataController.text : 'TEST_QR_001';
final textData1 = _textData1Controller.text.isNotEmpty ? _textData1Controller.text : 'Sample Customer Name';
final textData2 = _textData2Controller.text.isNotEmpty ? _textData2Controller.text : 'Sample Drop Point';
final textData3 = _textData3Controller.text.isNotEmpty ? _textData3Controller.text : 'Sample Additional Info';
_showMessage('π·οΈ Printing single label: ${width}x${height}mm, $copies copies, text size: $textSize...');
final success = await NtbpPlugin.printSingleLabelWithGapDetection(
qrData: qrData,
textData1: textData1,
textData2: textData2,
textData3: textData3,
width: width,
height: height,
unit: 'mm',
dpi: 203,
copies: copies,
textSize: textSize,
);
if (success) {
_showMessage('β
Single label printed successfully!');
} else {
_showMessage('β Failed to print single label');
}
} catch (e) {
_showMessage('β Error printing single label: $e');
}
}
Future<void> _printMultipleLabels() async {
try {
if (_connectedDevice == null) {
_showMessage('β Please connect to a printer first');
return;
}
if (_multipleLabelsData.isEmpty) {
_showMessage('β Please add some label data first');
return;
}
final width = double.tryParse(_widthController.text) ?? 75.0;
final height = double.tryParse(_heightController.text) ?? 50.0;
final copiesPerLabel = int.tryParse(_copiesController.text) ?? 1;
final textSize = int.tryParse(_textSizeController.text) ?? 9;
_showMessage('π·οΈ Printing ${_multipleLabelsData.length} labels: ${width}x${height}mm, $copiesPerLabel copies each, text size: $textSize...');
bool success = false;
// Use protocol-aware printing
if (_selectedProtocol == 'ESC/POS (TSPL Forced)' ||
(_selectedProtocol == 'Auto-Detect' && _shouldUseForcedTSPL())) {
// Use traditional TSPL printing for now (protocol methods not yet implemented)
// TODO: Implement protocol-based printing when available
success = await NtbpPlugin.printMultipleLabelsWithGapDetection(
labelDataList: _multipleLabelsData.map((data) => {
'qrData': data['qrData'] ?? 'QR_${DateTime.now().millisecondsSinceEpoch}',
'textData1': data['textData1'] ?? 'Customer_${DateTime.now().millisecondsSinceEpoch}',
'textData2': data['textData2'] ?? 'Drop_${DateTime.now().millisecondsSinceEpoch}',
'textData3': data['textData3'] ?? 'Drop_${DateTime.now().millisecondsSinceEpoch}',
}).toList(),
width: width,
height: height,
unit: 'mm',
dpi: 203,
copiesPerLabel: copiesPerLabel,
textSize: textSize,
);
} else {
// Use traditional TSPL printing
success = await NtbpPlugin.printMultipleLabelsWithGapDetection(
labelDataList: _multipleLabelsData.map((data) => {
'qrData': data['qrData'] ?? 'QR_${DateTime.now().millisecondsSinceEpoch}',
'textData1': data['textData1'] ?? 'Customer_${DateTime.now().millisecondsSinceEpoch}',
'textData2': data['textData2'] ?? 'Drop_${DateTime.now().millisecondsSinceEpoch}',
'textData3': data['textData3'] ?? 'Drop_${DateTime.now().millisecondsSinceEpoch}',
}).toList(),
width: width,
height: height,
unit: 'mm',
dpi: 203,
copiesPerLabel: copiesPerLabel,
textSize: textSize,
);
}
if (success) {
_showMessage('β
Multiple labels printed successfully!');
} else {
_showMessage('β Failed to print multiple labels');
}
} catch (e) {
_showMessage('β Error printing multiple labels: $e');
}
}
bool _shouldUseForcedTSPL() {
final deviceName = _connectedDevice?.name?.toLowerCase() ?? '';
return deviceName.contains('kt58l') ||
deviceName.contains('romeson') ||
deviceName.contains('esc/pos');
}
void _addLabelData() {
final qrData = _qrDataController.text.isNotEmpty ? _qrDataController.text : 'QR_${_multipleLabelsData.length + 1}';
final textData1 = _textData1Controller.text.isNotEmpty ? _textData1Controller.text : 'Customer_${_multipleLabelsData.length + 1}';
final textData2 = _textData2Controller.text.isNotEmpty ? _textData2Controller.text : 'Drop_${_multipleLabelsData.length + 1}';
final textData3 = _textData3Controller.text.isNotEmpty ? _textData3Controller.text : 'Ref_${_multipleLabelsData.length + 1}';
setState(() {
_multipleLabelsData.add({
'qrData': qrData,
'textData1': textData1,
'textData2': textData2,
'textData3': textData3,
});
});
_showMessage('β Added label data: $qrData - $textData1, $textData2, $textData3');
}
void _removeLabelData(int index) {
setState(() {
_multipleLabelsData.removeAt(index);
});
_showMessage('ποΈ Removed label ${index + 1}');
}
void _clearLabelData() {
setState(() {
_multipleLabelsData.clear();
});
_showMessage('ποΈ Cleared all label data');
}
void _showMessage(String message) {
if (mounted && ScaffoldMessenger.of(context).mounted) {
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(message),
duration: const Duration(seconds: 3),
behavior: SnackBarBehavior.floating,
),
);
}
// Also print to console for debugging
print('NTBP Plugin: $message');
}
Widget _buildStatusButton({
required VoidCallback? onPressed,
required IconData icon,
required String label,
required Color backgroundColor,
bool isLoading = false,
}) {
return ElevatedButton.icon(
onPressed: isLoading ? null : onPressed,
icon: Icon(icon, color: Colors.white),
label: Text(label),
style: ElevatedButton.styleFrom(
backgroundColor: backgroundColor,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
),
);
}
Widget _buildConfigField({
required TextEditingController controller,
required String label,
TextInputType keyboardType = TextInputType.text,
String? helperText,
}) {
return TextField(
controller: controller,
decoration: InputDecoration(
labelText: label,
border: const OutlineInputBorder(),
helperText: helperText,
),
keyboardType: keyboardType,
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('NTBP Plugin - Enhanced Bluetooth'),
backgroundColor: Colors.blue[700],
foregroundColor: Colors.white,
),
body: SingleChildScrollView(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
// Status Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π± Status',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.blue[700],
),
),
const SizedBox(height: 16),
// Responsive button layout
LayoutBuilder(
builder: (context, constraints) {
if (constraints.maxWidth > 600) {
// Wide layout - horizontal buttons
return Row(
children: [
Expanded(
child: _buildStatusButton(
onPressed: _requestPermissions,
icon: Icons.security,
label: 'Check Permissions',
backgroundColor: Colors.orange,
),
),
const SizedBox(width: 12),
Expanded(
child: _buildStatusButton(
onPressed: _isInitialized ? _startDiscovery : null,
icon: Icons.search,
label: _isDiscovering ? 'Discovering...' : 'Start Discovery',
backgroundColor: Colors.green,
isLoading: _isDiscovering,
),
),
const SizedBox(width: 12),
Expanded(
child: _buildStatusButton(
onPressed: _isDiscovering ? _stopDiscovery : null,
icon: Icons.stop,
label: 'Stop Discovery',
backgroundColor: Colors.red,
),
),
],
);
} else {
// Narrow layout - vertical buttons
return Column(
children: [
_buildStatusButton(
onPressed: _requestPermissions,
icon: Icons.security,
label: 'Check Permissions',
backgroundColor: Colors.orange,
),
const SizedBox(height: 12),
_buildStatusButton(
onPressed: _isInitialized ? _startDiscovery : null,
icon: Icons.search,
label: _isDiscovering ? 'Discovering...' : 'Start Discovery',
backgroundColor: Colors.green,
isLoading: _isDiscovering,
),
const SizedBox(height: 12),
_buildStatusButton(
onPressed: _isDiscovering ? _stopDiscovery : null,
icon: Icons.stop,
label: 'Stop Discovery',
backgroundColor: Colors.red,
),
],
);
}
},
),
],
),
),
),
const SizedBox(height: 16),
// Protocol Selection
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π§ Protocol Selection',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.purple[700],
),
),
const SizedBox(height: 12),
DropdownButtonFormField<String>(
value: _selectedProtocol,
decoration: const InputDecoration(
labelText: 'Printing Protocol',
border: OutlineInputBorder(),
helperText: 'Select the protocol for your printer',
),
items: _availableProtocols.map((protocol) {
return DropdownMenuItem(
value: protocol,
child: Text(protocol),
);
}).toList(),
onChanged: (value) {
setState(() {
_selectedProtocol = value ?? 'Auto-Detect';
});
},
),
],
),
),
),
const SizedBox(height: 16),
// Connection Queue Status
if (_connectionQueue.isNotEmpty || _isProcessingQueue)
Card(
color: Colors.amber[50],
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π Connection Queue',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.amber[700],
),
),
const SizedBox(height: 8),
Text('Status: $_queueStatus'),
Text('Queue Length: ${_connectionQueue.length}'),
if (_isProcessingQueue)
const LinearProgressIndicator(),
],
),
),
),
const SizedBox(height: 16),
// Device List
if (_availableDevices.isNotEmpty) ...[
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π Available Devices (${_availableDevices.length})',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.green[700],
),
),
const SizedBox(height: 12),
...(_availableDevices.map((device) {
final pairingStatus = _devicePairingStatus[device.address ?? ''] ?? 'UNKNOWN';
final needsPairing = pairingStatus == 'NOT_PAIRED';
final isConnected = _connectedDevice?.address == device.address && device.address != null;
return Card(
margin: const EdgeInsets.only(bottom: 12),
color: isConnected ? Colors.blue[50] : null,
elevation: isConnected ? 4 : 2,
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Icon(
isConnected ? Icons.bluetooth_connected : Icons.bluetooth,
color: isConnected ? Colors.blue[700] : Colors.grey[600],
size: 24,
),
const SizedBox(width: 12),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
device.name ?? 'Unknown Device',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: isConnected ? Colors.blue[700] : Colors.grey[800],
),
),
Text(
device.address ?? '',
style: Theme.of(context).textTheme.bodySmall?.copyWith(
color: Colors.grey[600],
),
),
],
),
),
],
),
const SizedBox(height: 12),
Row(
children: [
Container(
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
decoration: BoxDecoration(
color: needsPairing ? Colors.orange[100] : Colors.green[100],
borderRadius: BorderRadius.circular(12),
border: Border.all(
color: needsPairing ? Colors.orange : Colors.green,
width: 1,
),
),
child: Text(
'Status: $pairingStatus',
style: TextStyle(
color: needsPairing ? Colors.orange[800] : Colors.green[800],
fontWeight: FontWeight.bold,
fontSize: 12,
),
),
),
if (isConnected) ...[
const SizedBox(width: 8),
Container(
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
decoration: BoxDecoration(
color: Colors.blue[100],
borderRadius: BorderRadius.circular(12),
border: Border.all(
color: Colors.blue,
width: 1,
),
),
child: Text(
'β
CONNECTED',
style: TextStyle(
color: Colors.blue[800],
fontWeight: FontWeight.bold,
fontSize: 12,
),
),
),
],
],
),
const SizedBox(height: 16),
Row(
children: [
if (isConnected) ...[
Expanded(
child: ElevatedButton.icon(
onPressed: _disconnect,
icon: const Icon(Icons.link_off, size: 18),
label: const Text('Disconnect'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.red,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
] else ...[
Expanded(
child: ElevatedButton.icon(
onPressed: needsPairing ? null : () => _connectToDevice(device),
icon: Icon(
needsPairing ? Icons.lock : Icons.link,
size: 18,
),
label: Text(needsPairing ? 'Pair First' : 'Connect'),
style: ElevatedButton.styleFrom(
backgroundColor: needsPairing ? Colors.grey : Colors.blue,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
],
],
),
],
),
),
);
})),
],
),
),
),
const SizedBox(height: 16),
],
// Label Configuration Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'βοΈ Label Configuration',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.purple[700],
),
),
const SizedBox(height: 16),
// Responsive layout for configuration fields
LayoutBuilder(
builder: (context, constraints) {
if (constraints.maxWidth > 600) {
// Wide layout - horizontal fields
return Column(
children: [
Row(
children: [
Expanded(
child: _buildConfigField(
controller: _widthController,
label: 'Width (mm)',
keyboardType: TextInputType.number,
),
),
const SizedBox(width: 16),
Expanded(
child: _buildConfigField(
controller: _heightController,
label: 'Height (mm)',
keyboardType: TextInputType.number,
),
),
const SizedBox(width: 16),
Expanded(
child: _buildConfigField(
controller: _copiesController,
label: 'Copies',
keyboardType: TextInputType.number,
),
),
],
),
const SizedBox(height: 16),
Row(
children: [
Expanded(
child: _buildConfigField(
controller: _textSizeController,
label: 'Text Size (1-10)',
keyboardType: TextInputType.number,
helperText: 'Larger numbers = bigger text',
),
),
const SizedBox(width: 16),
Expanded(child: Container()), // Spacer
],
),
const SizedBox(height: 16),
Row(
children: [
Expanded(
child: _buildConfigField(
controller: _qrDataController,
label: 'QR Code Data',
),
),
const SizedBox(width: 16),
Expanded(
child: _buildConfigField(
controller: _textData1Controller,
label: 'Customer Name',
),
),
],
),
const SizedBox(height: 16),
Row(
children: [
Expanded(
child: _buildConfigField(
controller: _textData2Controller,
label: 'Drop Point',
),
),
const SizedBox(width: 16),
Expanded(
child: _buildConfigField(
controller: _textData3Controller,
label: 'Additional Info',
),
),
],
),
],
);
} else {
// Narrow layout - vertical fields
return Column(
children: [
_buildConfigField(
controller: _widthController,
label: 'Width (mm)',
keyboardType: TextInputType.number,
),
const SizedBox(height: 16),
_buildConfigField(
controller: _heightController,
label: 'Height (mm)',
keyboardType: TextInputType.number,
),
const SizedBox(height: 16),
_buildConfigField(
controller: _copiesController,
label: 'Copies',
keyboardType: TextInputType.number,
),
const SizedBox(height: 16),
_buildConfigField(
controller: _textSizeController,
label: 'Text Size (1-10)',
keyboardType: TextInputType.number,
helperText: 'Larger numbers = bigger text',
),
const SizedBox(height: 16),
_buildConfigField(
controller: _qrDataController,
label: 'QR Code Data',
),
const SizedBox(height: 16),
_buildConfigField(
controller: _textData1Controller,
label: 'Customer Name',
),
const SizedBox(height: 16),
_buildConfigField(
controller: _textData2Controller,
label: 'Drop Point',
),
const SizedBox(height: 16),
_buildConfigField(
controller: _textData3Controller,
label: 'Additional Info',
),
],
);
}
},
),
const SizedBox(height: 16),
Row(
children: [
Expanded(
child: ElevatedButton.icon(
onPressed: _setupSampleData,
icon: const Icon(Icons.data_usage, size: 18),
label: const Text('Load Sample Data'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.orange,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
],
),
],
),
),
),
const SizedBox(height: 16),
// Single Label Printing
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π·οΈ Single Label Printing',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.blue[700],
),
),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: ElevatedButton.icon(
onPressed: _connectedDevice != null ? _printSingleLabel : null,
icon: const Icon(Icons.print, size: 20),
label: const Text('Print Single Label'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.blue,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 16),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
],
),
),
),
const SizedBox(height: 16),
// Multiple Labels Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'π Multiple Labels Management',
style: Theme.of(context).textTheme.titleMedium?.copyWith(
fontWeight: FontWeight.bold,
color: Colors.green[700],
),
),
const SizedBox(height: 12),
Row(
children: [
Expanded(
child: ElevatedButton.icon(
onPressed: _addLabelData,
icon: const Icon(Icons.add, size: 18),
label: const Text('Add Label Data'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
const SizedBox(width: 12),
Expanded(
child: ElevatedButton.icon(
onPressed: _setupSampleMultipleLabels,
icon: const Icon(Icons.data_usage, size: 18),
label: const Text('Load Sample'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.orange,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
],
),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: ElevatedButton.icon(
onPressed: _multipleLabelsData.isNotEmpty ? _clearLabelData : null,
icon: const Icon(Icons.clear, size: 18),
label: const Text('Clear All Labels'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.red,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 12),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
if (_multipleLabelsData.isNotEmpty) ...[
const SizedBox(height: 12),
Text(
'Label Data (${_multipleLabelsData.length} items):',
style: const TextStyle(fontWeight: FontWeight.bold),
),
const SizedBox(height: 8),
...(_multipleLabelsData.asMap().entries.map((entry) {
final index = entry.key;
final data = entry.value;
return Card(
margin: const EdgeInsets.only(bottom: 4),
child: ListTile(
dense: true,
title: Text('${index + 1}. ${data['qrData']}'),
subtitle: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Customer: ${data['textData1'] ?? ''}'),
Text('Drop: ${data['textData2'] ?? ''}'),
Text('Ref: ${data['textData3'] ?? ''}'),
],
),
trailing: IconButton(
icon: const Icon(Icons.delete, color: Colors.red),
onPressed: () => _removeLabelData(index),
),
),
);
})),
const SizedBox(height: 12),
SizedBox(
width: double.infinity,
child: ElevatedButton.icon(
onPressed: _connectedDevice != null ? _printMultipleLabels : null,
icon: const Icon(Icons.print, size: 20),
label: const Text('Print Multiple Labels'),
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
padding: const EdgeInsets.symmetric(vertical: 16),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
),
),
],
],
),
),
),
const SizedBox(height: 16),
// Connection Status
if (_connectedDevice != null)
Card(
color: Colors.green[50],
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Row(
children: [
Icon(Icons.bluetooth_connected, color: Colors.green[700]),
const SizedBox(width: 8),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'β
Connected',
style: TextStyle(
fontWeight: FontWeight.bold,
color: Colors.green[700],
),
),
Text(_connectedDevice?.name ?? 'Unknown Device'),
Text(_connectedDevice?.address ?? ''),
Text('Protocol: $_selectedProtocol'),
],
),
),
],
),
),
),
],
),
),
);
}
@override
void dispose() {
_qrDataController.dispose();
_textData1Controller.dispose();
_textData2Controller.dispose();
_textData3Controller.dispose();
_widthController.dispose();
_heightController.dispose();
_copiesController.dispose();
_textSizeController.dispose();
_multipleLabelsController.dispose();
super.dispose();
}
}Metadata
1
likes
140
points
31
downloads
Publisher
unverified uploader
Weekly Downloads
Metadata
A comprehensive Flutter plugin for thermal Bluetooth label printing with advanced features including gap detection, precise positioning, and support for multiple label formats.
Repository (GitHub)
View/report issues
Documentation
License
MIT (license)
Dependencies
flutter, permission_handler, plugin_platform_interface
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