vitallens_flutter 0.1.0

vitallens_flutter: ^0.1.0 copied to clipboard

example/lib/main.dart

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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'VitalLens Flutter Example',
      theme: ThemeData.dark().copyWith(
        scaffoldBackgroundColor: const Color(0xFF0F141C),
        colorScheme: const ColorScheme.dark(
          primary: Color(0xFF00E5FF),
          secondary: Color(0xFF00E676),
        ),
      ),
      home: const ExampleHomeScreen(),
    );
  }
}

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

  @override
  State<ExampleHomeScreen> createState() => _ExampleHomeScreenState();
}

class _ExampleHomeScreenState extends State<ExampleHomeScreen> {
  final TextEditingController _keyController = TextEditingController(
    text: const String.fromEnvironment('ROUAST_API_KEY'),
  );

  VitalLensResult? _lastResult;
  bool _isScanning = false;

  @override
  void dispose() {
    _keyController.dispose();
    super.dispose();
  }

  Future<void> _launchScan() async {
    final key = _keyController.text.trim();
    if (key.isEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Please enter your Rouast VitalLens API Key'),
          backgroundColor: Colors.amber,
        ),
      );
      return;
    }

    setState(() => _isScanning = true);

    final result = await VitalLens.startScan(
      apiKey: key,
      mode: VitalLensMode.eco,
    );

    setState(() {
      _isScanning = false;
      _lastResult = result;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('VitalLens Flutter Example'),
        backgroundColor: const Color(0xFF131A26),
      ),
      body: SingleChildScrollView(
        padding: const EdgeInsets.all(20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            TextField(
              controller: _keyController,
              obscureText: true,
              decoration: InputDecoration(
                labelText: 'VitalLens API Key',
                hintText: 'Enter API Key from rouast.com',
                border: OutlineInputBorder(
                  borderRadius: BorderRadius.circular(12),
                ),
                prefixIcon: const Icon(Icons.key_rounded),
              ),
            ),
            const SizedBox(height: 16),
            ElevatedButton.icon(
              onPressed: _isScanning ? null : _launchScan,
              icon: _isScanning
                  ? const SizedBox(
                      width: 18,
                      height: 18,
                      child: CircularProgressIndicator(strokeWidth: 2),
                    )
                  : const Icon(Icons.videocam_rounded),
              label: Text(_isScanning ? 'Scanning...' : 'Start 30s Face Scan'),
              style: ElevatedButton.styleFrom(
                backgroundColor: const Color(0xFF00E5FF),
                foregroundColor: Colors.black,
                padding: const EdgeInsets.symmetric(vertical: 14),
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(12),
                ),
              ),
            ),
            const SizedBox(height: 24),
            if (_lastResult != null) ...[
              Card(
                color: const Color(0xFF1B2838),
                shape: RoundedRectangleBorder(
                  borderRadius: BorderRadius.circular(16),
                ),
                child: Padding(
                  padding: const EdgeInsets.all(16),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        _lastResult!.isCompleted
                            ? 'Estimation Results'
                            : 'Scan Status: ${_lastResult!.message}',
                        style: const TextStyle(
                          fontSize: 16,
                          fontWeight: FontWeight.bold,
                          color: Color(0xFF00E5FF),
                        ),
                      ),
                      const SizedBox(height: 12),
                      if (_lastResult!.isCompleted) ...[
                        Text(
                          'Heart Rate: ${_lastResult!.heartRate?.toStringAsFixed(1) ?? '--'} BPM',
                          style: const TextStyle(fontSize: 18),
                        ),
                        Text(
                          'HRV (SDNN): ${_lastResult!.hrvSdnn?.toStringAsFixed(1) ?? '--'} ms',
                          style: const TextStyle(fontSize: 18),
                        ),
                        Text(
                          'Respiration: ${_lastResult!.respiratoryRate?.toStringAsFixed(1) ?? '--'} BrPM',
                          style: const TextStyle(fontSize: 18),
                        ),
                        if (_lastResult!.ppgData.isNotEmpty) ...[
                          const SizedBox(height: 16),
                          const Text(
                            'rPPG Pulse Waveform',
                            style: TextStyle(fontSize: 14, color: Colors.white70),
                          ),
                          const SizedBox(height: 8),
                          SizedBox(
                            height: 100,
                            child: PpgWaveformView(
                              dataPoints: _lastResult!.ppgData,
                              strokeColor: const Color(0xFF00E5FF),
                            ),
                          ),
                        ],
                      ],
                    ],
                  ),
                ),
              ),
            ],
          ],
        ),
      ),
    );
  }
}