Quick Start (Flutter)

Supported Platform

• Android
• iOS

Supported Environment

• Flutter >=3.3.0

• Dart >=2.17.0 <4.0.0

• Minimum supported Android API level is 23.

• Target Android API level is 34.

• Minimum supported iOS Version is 13.0.

• Camera permission, Network permission and Network connected environment are required.

• Build target to REAL DEVICE during the development process.

info

Eyedid SDK uses the front camera of the device

Environment Set-ups

• Check the Development key.

• Create the new flutter project from terminal.

  flutter create --platforms android,ios sample_app

• Added eyedid_flutter to sample_app's pubspec.yaml file.

  dependencies:
  flutter:
    sdk: flutter
  eyedid_flutter:^1.0.0-beta2

• Install pub packge from terminal.

  flutter pub get

Environment Set-ups (Android)

• Add the maven repository URL 'https://seeso.jfrog.io/artifactory/visualcamp-eyedid-sdk-android-release' to the build.gradle file where eyedid is located.

  allprojects {
      repositories {
          ...
          maven {
              url "https://seeso.jfrog.io/artifactory/visualcamp-eyedid-sdk-android-release"
          }
      }
  }

• Add the following dependencies to the app/build.gradle file.

  dependencies {
    ...
    implementation "camp.visual.eyedid.android.gazetracker:eyedid-gazetracker:{version}"
  }

Environment Set-ups (iOS)

• Add permission to your Info.plist file.

    <key>NSCameraUsageDescription</key>
    <string></string>

• Add PERMISSION_CAMERA=1 to your Podfile.

  target.build_configurations.each do |config|
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
        ...
        'PERMISSION_CAMERA=1'
      ]
  end

• Pod install from terminal.

  pod install

Sample App Implementation

1. Add code to check if you have camera permission.

   Future<void> checkCameraPermission() async {
       _hasCameraPermission = await _eyedidFlutterPlugin.checkCameraPermission();
     }

2. Add a function to request camera permission.

   Future<void> checkCameraPermission() async {
     _hasCameraPermission = await _eyedidFlutterPlugin.checkCameraPermission();
     ///If you do not have camera permission, call the requesting function.
     if (!_hasCameraPermission) {
       _hasCameraPermission = await _eyedidFlutterPlugin.requestCameraPermission();
     }
   }

3. When camera permission is obtained through the user, authentication begins by calling the initGazeTracker function.

     Future<void> initEyedid() async {
       await checkCameraPermission();
       String requestInitGazeTracker = "failed Request";
       if (_hasCameraPermission) {
         try {
           final options = GazeTrackerOptionsBuilder()
                       .setPreset(CameraPreset.vga640x480)
                       .setUseGazeFilter(false)
                       .setUseBlink(false)
                       .setUseUserStatus(false)
                       .build();
           InitializedResult? initializedResult =
               await _eyedidFlutterPlugin.initGazeTracker(licenseKey: _licenseKey, options: options);
         } on PlatformException catch (e) {
           print( "Occur PlatformException (${e.message})");
         }
       }
     }

4. When authentication is successful, eye tracking begins.

    if (initializedResult!.result) {
       try {
         _eyedidFlutterPlugin.startTracking();
       } on PlatformException catch (e) {
         print("Occur PlatformException (${e.message})");
       }
     }

5. Set a listener to receive GazeInfo.

      _eyedidFlutterPlugin.getTrackingEvent().listen((event) {
       final info = MetricsInfo(event);
       if (info.gazeInfo.trackingState == TrackingState.success) {
         print("gaze info ${info.gazeInfo.gaze.x}, ${info.gazeInfo.gaze.y}");
       } else {
         print("gaze not found");
       }
     }
   );

6. Here is the full code.

   import 'dart:async';
   import 'package:flutter/material.dart';
   import 'package:flutter/services.dart';
   
   import 'package:eyedid_flutter/eyedid_flutter.dart';
   import 'package:eyedid_flutter/gaze_tracker_options.dart';
   import 'package:eyedid_flutter/eyedid_flutter_initialized_result.dart';
   import 'package:eyedid_flutter/events/eyedid_flutter_metrics.dart';
   
   class MyApp extends StatefulWidget {
     MyApp({Key? key}) : super(key: key); 
   
     @override
     State<MyApp> createState() => _MyAppState();
   }
   
   class _MyAppState extends State<MyApp> {
     final _eyedidFlutterPlugin = EyedidFlutter();
     static const String _licenseKey = "Input your licenseKey"; // todo: input your license key
     double _x = 0.0, _y = 0.0;
     bool _hasCameraPermission = false;
     MaterialColor _gazeColor = Colors.red;
   
     @override
     void initState() {
       super.initState();
       initEyedid();
     }
   
     Future<void> checkCameraPermission() async {
       _hasCameraPermission = await _eyedidFlutterPlugin.checkCameraPermission();
       if (!_hasCameraPermission) {
         _hasCameraPermission = await _eyedidFlutterPlugin.requestCameraPermission();
       }
       if (!mounted) {
         return;
       }
     }
   
     Future<void> initEyedid() async {
       await checkCameraPermission();
       if (_hasCameraPermission) {
         try {
           final options = GazeTrackerOptionsBuilder()
               .setPreset(CameraPreset.vga640x480)
               .setUseGazeFilter(false)
               .setUseBlink(false)
               .setUseUserStatus(false)
               .build();
           InitializedResult? initializedResult =
               await _eyedidFlutterPlugin.initGazeTracker(licenseKey: _licenseKey, options: options);
           if (initializedResult!.result) {
             listenEvents();
             try {
               _eyedidFlutterPlugin.startTracking();
             } on PlatformException catch (e) {
               print("Occur PlatformException (${e.message})");
             }
           }
         } on PlatformException catch (e) {
           print("Occur PlatformException (${e.message})");
         }
       }
     }
   
     void listenEvents() {
       _eyedidFlutterPlugin.getTrackingEvent().listen((event) {
         MetricsInfo info = MetricsInfo(event);
   
         if (info.gazeInfo.trackingState == TrackingState.success) {
           setState(() {
             _x = info.gazeInfo.gaze.x;
             _y = info.gazeInfo.gaze.y;
             _gazeColor = Colors.green;
           });
         } else {
           setState(() {
             _gazeColor = Colors.red;
           });
         }
       });
     }
   
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
           home: Scaffold(
               appBar: null, // Hide the AppBar
               body: Stack(children: <Widget>[
                 Positioned(
                     left: _x - 5,
                     top: _y - 5,
                     child: Container(
                       width: 10,
                       height: 10,
                       decoration: BoxDecoration(
                         color: _gazeColor,
                         shape: BoxShape.circle,
                       ),
                     )),
               ])));
     }
   }