x_printer_pck 0.0.4 
x_printer_pck: ^0.0.4 copied to clipboard
Flutter plugin for iOS Bluetooth thermal printer integration
import 'dart:developer';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:x_printer_pck/x_printer_pck.dart';
import 'package:x_printer_pck/x_printer_pck_method_channel.dart';
void main() {
runApp(const MaterialApp(home: Scaffold(body: Base64PrinterExample())));
}
@immutable
class Base64PrinterExample extends StatelessWidget {
const Base64PrinterExample({super.key});
@override
Widget build(BuildContext context) => const Base64PrinterPage();
}
@immutable
class Base64PrinterPage extends StatefulWidget {
const Base64PrinterPage({super.key});
@override
_Base64PrinterPageState createState() => _Base64PrinterPageState();
}
class _Base64PrinterPageState extends State<Base64PrinterPage> {
final List<BluetoothDevice> _devices = [];
ConnectionStatus? _connectionStatus;
final TextEditingController _base64Controller = TextEditingController();
bool _isScanning = false;
String _statusMessage = '';
// Configuration variables
PrinterCommandType _commandType = PrinterCommandType.tspl;
int _printerWidth = 384;
int _printerHeight = 600;
int _rotation = 0;
double _scale = 0.9;
double _quality = 1.0;
PrintAlignment _alignment = PrintAlignment.center;
int _customX = 0;
int _customY = 0;
// Sample base64 images for testing
final Map<String, String> _sampleImages = {
'Small Test Image':
'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==',
'Data URL Format':
'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==',
'QR Code Sample':
'/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopGR8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCj/wAARCAABAAEDASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAv/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAAAAX/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwCdABmX/9k=',
};
@override
void initState() {
super.initState();
XPrinterPck.initialize();
// Set up event listeners
XPrinterPck.onScanResults = (devices) {
setState(() {
_devices.clear();
_devices.addAll(devices);
});
};
XPrinterPck.onConnectionChanged = (status) {
setState(() {
_connectionStatus = status;
_statusMessage = 'Printer ${status.name} is ${status.status}';
if (status.error.isNotEmpty) {
_statusMessage += ' (${status.error})';
}
});
};
}
void _scanDevices() async {
setState(() {
_isScanning = true;
_devices.clear();
_statusMessage = 'Scanning for devices...';
});
try {
await XPrinterPck.scanDevices();
// Auto-stop scan after 10 seconds
Future.delayed(const Duration(seconds: 10), () {
if (_isScanning) {
_stopScan();
}
});
} catch (e) {
setState(() {
_statusMessage = 'Error starting scan: $e';
_isScanning = false;
});
}
}
void _stopScan() async {
try {
await XPrinterPck.stopScan();
} catch (e) {
setState(() {
_statusMessage = 'Error stopping scan: $e';
});
} finally {
setState(() {
_isScanning = false;
});
}
}
void _connectToDevice(int index) async {
if (index < 0 || index >= _devices.length) return;
try {
setState(() {
_statusMessage = 'Connecting to ${_devices[index].name}...';
});
await XPrinterPck.connectDevice(index);
} catch (e) {
setState(() {
_statusMessage = 'Error connecting: $e';
});
}
}
void _disconnectDevice() async {
try {
await XPrinterPck.disconnectDevice();
} catch (e) {
setState(() {
_statusMessage = 'Error disconnecting: $e';
});
}
}
// Print Base64 image with current configuration
Future<void> _printBase64Image() async {
if (_base64Controller.text.isEmpty) {
setState(() {
_statusMessage = 'Please enter a Base64 string';
});
return;
}
try {
setState(() {
_statusMessage = 'Printing Base64 image...';
});
bool result = await XPrinterPck.printImageBase64(
_base64Controller.text,
commandType: _commandType,
printerWidth: _printerWidth,
printerHeight: _printerHeight,
rotation: _rotation,
scale: _scale,
quality: _quality,
alignment: _alignment,
x: _alignment == PrintAlignment.custom ? _customX : null,
y: _alignment == PrintAlignment.custom ? _customY : null,
);
setState(() {
_statusMessage = result
? 'Base64 image printed successfully!'
: 'Failed to print Base64 image';
});
} catch (e) {
setState(() {
_statusMessage = 'Error printing Base64 image: $e';
});
print('Print error: $e');
}
}
// Convert image file to Base64 and print
Future<void> _pickImageAndConvertToBase64() async {
try {
final ImagePicker picker = ImagePicker();
final XFile? image = await picker.pickImage(source: ImageSource.gallery);
if (image != null) {
final bytes = await image.readAsBytes();
final base64String = base64Encode(bytes);
setState(() {
_base64Controller.text = base64String;
_statusMessage = 'Image converted to Base64. Ready to print!';
});
}
} catch (e) {
setState(() {
_statusMessage = 'Error converting image to Base64: $e';
});
}
}
// Test different configurations
Future<void> _testDifferentConfigurations() async {
if (_base64Controller.text.isEmpty) {
setState(() {
_statusMessage = 'Please enter a Base64 string first';
});
return;
}
final configurations = [
{
'name': 'Center Aligned',
'alignment': PrintAlignment.center,
'scale': 0.8,
},
{
'name': 'Top Left',
'alignment': PrintAlignment.topLeft,
'scale': 0.6,
},
{
'name': 'Rotated 90°',
'alignment': PrintAlignment.center,
'rotation': 90,
'scale': 0.7,
},
{
'name': 'High Quality',
'alignment': PrintAlignment.center,
'quality': 1.0,
'scale': 0.9,
},
{
'name': 'Custom Position',
'alignment': PrintAlignment.custom,
'x': 100,
'y': 50,
'scale': 0.5,
},
];
for (var config in configurations) {
setState(() {
_statusMessage = 'Printing: ${config['name']}...';
});
try {
await XPrinterPck.printImageBase64(
_base64Controller.text,
commandType: _commandType,
printerWidth: _printerWidth,
printerHeight: _printerHeight,
rotation: int.parse(config['rotation']?.toString() ?? '0'),
scale: double.tryParse(config['scale']?.toString() ?? '0') ?? 0.9,
quality: double.tryParse(config['quality']?.toString() ?? '0') ?? 1.0,
// alignment: config['alignment'] ?? PrintAlignment.center,
x: int.tryParse(config['x']?.toString() ?? '0'),
y: int.tryParse(config['y']?.toString() ?? '0'),
// config['y'],
);
// Wait between prints
await Future.delayed(const Duration(seconds: 2));
} catch (e) {
setState(() {
_statusMessage = 'Error in ${config['name']}: $e';
});
return;
}
}
setState(() {
_statusMessage = 'All test configurations completed!';
});
}
// Performance test
Future<void> _performanceTest() async {
if (_base64Controller.text.isEmpty) {
setState(() {
_statusMessage = 'Please enter a Base64 string first';
});
return;
}
final stopwatch = Stopwatch()..start();
try {
setState(() {
_statusMessage = 'Running performance test...';
});
await XPrinterPck.printImageBase64(
_base64Controller.text,
commandType: _commandType,
printerWidth: _printerWidth,
printerHeight: _printerHeight,
quality: 1.0,
);
stopwatch.stop();
setState(() {
_statusMessage =
'Performance test completed in ${stopwatch.elapsedMilliseconds}ms';
});
} catch (e) {
stopwatch.stop();
setState(() {
_statusMessage =
'Performance test failed: $e (${stopwatch.elapsedMilliseconds}ms)';
});
}
}
void _getPrinterStatus() async {
try {
final status = await XPrinterPck.getPrinterStatus();
setState(() {
_statusMessage =
'Printer Status: ${status.message} (Code: 0x${status.code.toRadixString(16).toUpperCase()})';
});
} catch (e) {
setState(() {
_statusMessage = 'Error getting printer status: $e';
});
}
}
@override
void setState(VoidCallback fn) {
super.setState(fn);
log(_statusMessage);
}
@override
Widget build(BuildContext context) {
XPrinterPck.initialize();
final bool isConnected = _connectionStatus?.isConnected ?? false;
return Scaffold(
appBar: AppBar(
title: const Text('Base64 Printer Test'),
backgroundColor: Colors.blue,
foregroundColor: Colors.white,
actions: [
if (isConnected)
IconButton(
icon: const Icon(Icons.info_outline),
onPressed: _getPrinterStatus,
tooltip: 'Get Printer Status',
),
],
),
body: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
// Status Card
Card(
color: isConnected ? Colors.green[50] : Colors.red[50],
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
children: [
Icon(
isConnected ? Icons.check_circle : Icons.error,
color: isConnected ? Colors.green : Colors.red,
size: 32,
),
const SizedBox(height: 8),
Text(
isConnected
? 'Connected to ${_connectionStatus?.name}'
: 'Not Connected',
style: const TextStyle(
fontWeight: FontWeight.bold,
fontSize: 16,
),
),
const SizedBox(height: 8),
Text(
_statusMessage,
textAlign: TextAlign.center,
style: const TextStyle(fontSize: 14),
),
],
),
),
),
const SizedBox(height: 16),
// Device Scanning Section
if (!isConnected) ...[
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Text(
'Bluetooth Devices',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 16),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Expanded(
child: ElevatedButton.icon(
icon: Icon(
_isScanning ? Icons.stop : Icons.search),
label: Text(
_isScanning ? 'Stop Scan' : 'Scan Devices'),
onPressed:
_isScanning ? _stopScan : _scanDevices,
style: ElevatedButton.styleFrom(
backgroundColor:
_isScanning ? Colors.red : Colors.blue,
foregroundColor: Colors.white,
),
),
),
],
),
const SizedBox(height: 16),
if (_devices.isEmpty && _isScanning)
const Center(child: CircularProgressIndicator())
else if (_devices.isEmpty && !_isScanning)
const Center(
child: Text('No devices found. Try scanning.'))
else
ListView.separated(
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
itemCount: _devices.length,
separatorBuilder: (context, index) =>
const Divider(),
itemBuilder: (context, index) {
final device = _devices[index];
return ListTile(
leading: const Icon(Icons.bluetooth,
color: Colors.blue),
title: Text(device.name),
subtitle: Text('RSSI: ${device.rssi} dBm'),
trailing: ElevatedButton(
onPressed: () => _connectToDevice(index),
child: const Text('Connect'),
),
);
},
),
],
),
),
),
const SizedBox(height: 16),
],
// Disconnect Button
if (isConnected) ...[
ElevatedButton.icon(
icon: const Icon(Icons.bluetooth_disabled),
label: const Text('Disconnect'),
onPressed: _disconnectDevice,
style: ElevatedButton.styleFrom(
backgroundColor: Colors.red,
foregroundColor: Colors.white,
),
),
const SizedBox(height: 16),
],
// Configuration Panel
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Printer Configuration',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 16),
// Command Type
Row(
children: [
const Text('Command Type: '),
const SizedBox(width: 8),
DropdownButton<PrinterCommandType>(
value: _commandType,
onChanged: (PrinterCommandType? value) {
if (value != null) {
setState(() {
_commandType = value;
});
}
},
items: PrinterCommandType.values
.map((PrinterCommandType type) {
return DropdownMenuItem<PrinterCommandType>(
value: type,
child: Text(type.name.toUpperCase()),
);
}).toList(),
),
],
),
// Printer Size
Row(
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text('Width (dots)'),
Slider(
value: _printerWidth.toDouble(),
min: 200,
max: 1000,
divisions: 16,
label: _printerWidth.toString(),
onChanged: (double value) {
setState(() {
_printerWidth = value.round();
});
},
),
],
),
),
const SizedBox(width: 16),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text('Height (dots)'),
Slider(
value: _printerHeight.toDouble(),
min: 200,
max: 1000,
divisions: 16,
label: _printerHeight.toString(),
onChanged: (double value) {
setState(() {
_printerHeight = value.round();
});
},
),
],
),
),
],
),
// Scale and Quality
Row(
children: [
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Scale: ${_scale.toStringAsFixed(2)}'),
Slider(
value: _scale,
min: 0.1,
max: 1.0,
divisions: 9,
onChanged: (double value) {
setState(() {
_scale = value;
});
},
),
],
),
),
const SizedBox(width: 16),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text('Quality: ${_quality.toStringAsFixed(2)}'),
Slider(
value: _quality,
min: 0.1,
max: 1.0,
divisions: 9,
onChanged: (double value) {
setState(() {
_quality = value;
});
},
),
],
),
),
],
),
// Rotation
Row(
children: [
const Text('Rotation: '),
const SizedBox(width: 8),
DropdownButton<int>(
value: _rotation,
onChanged: (int? value) {
if (value != null) {
setState(() {
_rotation = value;
});
}
},
items: [0, 90, 180, 270].map((int rotation) {
return DropdownMenuItem<int>(
value: rotation,
child: Text('${rotation}°'),
);
}).toList(),
),
],
),
// Alignment
Row(
children: [
const Text('Alignment: '),
const SizedBox(width: 8),
DropdownButton<PrintAlignment>(
value: _alignment,
onChanged: (PrintAlignment? value) {
if (value != null) {
setState(() {
_alignment = value;
});
}
},
items: PrintAlignment.values
.map((PrintAlignment alignment) {
return DropdownMenuItem<PrintAlignment>(
value: alignment,
child: Text(alignment.name),
);
}).toList(),
),
],
),
// Custom Position (only if alignment is custom)
if (_alignment == PrintAlignment.custom)
Row(
children: [
Expanded(
child: TextField(
decoration: const InputDecoration(
labelText: 'X Position',
border: OutlineInputBorder(),
),
keyboardType: TextInputType.number,
onChanged: (String value) {
_customX = int.tryParse(value) ?? 0;
},
),
),
const SizedBox(width: 16),
Expanded(
child: TextField(
decoration: const InputDecoration(
labelText: 'Y Position',
border: OutlineInputBorder(),
),
keyboardType: TextInputType.number,
onChanged: (String value) {
_customY = int.tryParse(value) ?? 0;
},
),
),
],
),
],
),
),
),
const SizedBox(height: 16),
// Base64 Input Section
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Text(
'Base64 Image Input',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 16),
// Sample images buttons
Wrap(
spacing: 8,
children: _sampleImages.keys.map((String name) {
return ElevatedButton(
onPressed: () {
setState(() {
_base64Controller.text = _sampleImages[name]!;
_statusMessage = 'Loaded sample: $name';
});
},
child: Text(name),
);
}).toList(),
),
const SizedBox(height: 16),
// Base64 input field
TextField(
controller: _base64Controller,
decoration: const InputDecoration(
border: OutlineInputBorder(),
labelText: 'Base64 String',
hintText: 'Paste Base64 image data here...',
),
maxLines: 5,
),
const SizedBox(height: 16),
// Action buttons
Row(
children: [
Expanded(
child: ElevatedButton.icon(
icon: const Icon(Icons.image),
label: const Text('Pick & Convert'),
onPressed: _pickImageAndConvertToBase64,
),
),
const SizedBox(width: 8),
Expanded(
child: ElevatedButton.icon(
icon: const Icon(Icons.clear),
label: const Text('Clear'),
onPressed: () {
setState(() {
_base64Controller.clear();
_statusMessage = 'Base64 input cleared';
});
},
),
),
],
),
],
),
),
),
const SizedBox(height: 16),
// Print Actions
if (isConnected) ...[
Card(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
Text(
'Print Actions',
style: Theme.of(context).textTheme.titleLarge,
),
const SizedBox(height: 16),
// Main print button
ElevatedButton.icon(
icon: const Icon(Icons.print),
label: const Text('Print Base64 Image'),
onPressed: _base64Controller.text.isNotEmpty
? _printBase64Image
: null,
style: ElevatedButton.styleFrom(
backgroundColor: Colors.green,
foregroundColor: Colors.white,
padding: const EdgeInsets.all(16),
),
),
const SizedBox(height: 12),
// Test buttons
Row(
children: [
Expanded(
child: ElevatedButton.icon(
icon: const Icon(Icons.science),
label: const Text('Test Configs'),
onPressed: _base64Controller.text.isNotEmpty
? _testDifferentConfigurations
: null,
),
),
const SizedBox(width: 8),
Expanded(
child: ElevatedButton.icon(
icon: const Icon(Icons.speed),
label: const Text('Performance'),
onPressed: _base64Controller.text.isNotEmpty
? _performanceTest
: null,
),
),
],
),
],
),
),
),
] else ...[
const Card(
child: Padding(
padding: EdgeInsets.all(16.0),
child: Center(
child: Text(
'Please connect to a printer to enable printing functions',
style: TextStyle(
fontSize: 16,
color: Colors.grey,
),
textAlign: TextAlign.center,
),
),
),
),
],
],
),
),
),
);
}
@override
void dispose() {
_base64Controller.dispose();
super.dispose();
}
}Metadata
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Metadata
Flutter plugin for iOS Bluetooth thermal printer integration
Repository (GitHub)
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Documentation
License
MIT (license)
Dependencies
flutter, plugin_platform_interface
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