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bijoy
2023-06-30 22:28:21 +06:00
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lib/map_camera_flutter.dart Normal file
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library map_camera_flutter;
export 'package:flutter/material.dart';
export 'dart:async';
export 'dart:io';
export 'dart:math';
export 'package:camera/camera.dart';
export 'package:flutter/foundation.dart';
export 'package:flutter/rendering.dart';
export 'package:flutter_map/flutter_map.dart';
export 'package:flutter_map_location_marker/flutter_map_location_marker.dart';
export 'package:geocoding/geocoding.dart';
export 'package:geolocator/geolocator.dart';
export 'package:path_provider/path_provider.dart';
export 'package:map_camera_flutter/src/image_and_location_data.dart';
export 'src/map_camera.dart';

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lib/src/image_and_location_data.dart Normal file
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class ImageAndLocationData{
final String? imagePath;
final String? latitude;
final String? longitude;
final String? locationName;
final String? subLocation;
ImageAndLocationData({
required this.imagePath,
required this.latitude,
required this.longitude,
required this.locationName,
required this.subLocation,
});
}

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lib/src/map_camera.dart Normal file
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import 'package:intl/intl.dart';
import 'dart:ui' as ui;
import 'package:latlong2/latlong.dart' as lat;
import 'package:permission_handler/permission_handler.dart';
import '../../map_camera_flutter.dart';
///import 'package:your_app/map_camera_location.dart'; // Import the file where the MapCameraLocation widget is defined
/// ```
/// void main() {
/// runApp(MyApp());
/// }
///
/// class MyApp extends StatelessWidget {
/// @override
/// Widget build(BuildContext context) {
/// return MaterialApp(
/// home: CameraLocationScreen(),
/// );
/// }
/// }
///
/// class CameraLocationScreen extends StatelessWidget {
// // Callback function to handle the captured image and location data
/// void handleImageAndLocationData(ImageAndLocationData data) {
// // You can use the data here as needed
/// print('Image Path: ${data.imagePath}');
/// print('Latitude: ${data.latitude}');
/// print('Longitude: ${data.longitude}');
/// print('Location Name: ${data.locationName}');
/// print('Sublocation: ${data.subLocation}');
/// }
///
/// @override
/// Widget build(BuildContext context) {
/// // Provide the CameraDescription and the handleImageAndLocationData callback function to the MapCameraLocation widget
/// return MapCameraLocation(
/// camera: YOUR_CAMERA_DESCRIPTION_OBJECT, // Replace YOUR_CAMERA_DESCRIPTION_OBJECT with your actual CameraDescription
/// onImageCaptured: handleImageAndLocationData,
/// );
/// }
/// }
/// ```
// Callback function type for capturing image and location data
typedef ImageAndLocationCallback = void Function(ImageAndLocationData data);
class MapCameraLocation extends StatefulWidget {
final CameraDescription camera;
final ImageAndLocationCallback? onImageCaptured;
/// Constructs a MapCameraLocation widget.
///
/// The [camera] parameter is required and represents the camera to be used for capturing images.
/// The [onImageCaptured] parameter is an optional callback function that will be triggered when an image and location data are captured.
const MapCameraLocation({Key? key, required this.camera, this.onImageCaptured}) : super(key: key);
@override
State<MapCameraLocation> createState() => _MapCameraLocationState();
}
class _MapCameraLocationState extends State<MapCameraLocation> {
late CameraController _controller;
/// Represents a controller for the camera, used to control camera-related operations.
late Future<void> _initializeControllerFuture;
/// Represents a future that resolves when the camera controller has finished initializing.
late FollowOnLocationUpdate _followOnLocationUpdate;
/// Enum value indicating when to follow location updates.
late StreamController<double?> _followCurrentLocationStreamController;
/// Stream controller used to track the current location.
File? cameraImagePath;
/// File path of the captured camera image.
File? ssImage;
/// (Please provide information about its purpose.)
String? dateTime;
/// A formatted string representing the current date and time.
final globalKey = GlobalKey();
/// Key used to uniquely identify and control a widget.
Placemark? placeMark;
/// Represents geocoded location information.
String? latitudeServer;
/// Latitude value of the current location as a string.
String? longitudeServer;
/// Longitude value of the current location as a string.
String? locationName;
/// Name of the current location as a string.
String? subLocation;
/// Sublocation of the current location as a string.
/// Callback function to retrieve the image and location data.
ImageAndLocationData getImageAndLocationData() {
return ImageAndLocationData(
imagePath: cameraImagePath?.path,
latitude: latitudeServer,
longitude: longitudeServer,
locationName: locationName,
subLocation: subLocation,
);
}
@override
void initState() {
super.initState();
// Initialize the camera controller
_controller = CameraController(
widget.camera,
ResolutionPreset.medium,
);
_initializeControllerFuture = _controller.initialize();
_followOnLocationUpdate = FollowOnLocationUpdate.always;
_followCurrentLocationStreamController = StreamController<double?>();
// Get the current date and time in a formatted string
dateTime = DateFormat.yMd().add_jm().format(DateTime.now());
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black,
body: FutureBuilder<void>(
future: _initializeControllerFuture,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
return RepaintBoundary(
key: globalKey,
child: Stack(
children: [
CameraPreview(
_controller,
),
Positioned(
left: 0,
right: 0,
bottom: 10,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
SizedBox(
height: 130,
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding:
const EdgeInsets.symmetric(horizontal: 8.0),
child: Card(
elevation: 3,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8.0)),
child: SizedBox(
// height: 130,
width: 100,
child: Padding(
padding: const EdgeInsets.all(5.0),
child: latitudeServer == null
? const Center(
child:
CircularProgressIndicator())
: FlutterMap(
options: MapOptions(
center: const lat.LatLng(0, 0),
zoom: 13.0,
onPositionChanged:
(MapPosition position,
bool hasGesture) {
if (hasGesture) {
setState(
() => _followOnLocationUpdate =
FollowOnLocationUpdate
.never,
);
}
},
),
children: [
TileLayer(
urlTemplate:
'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
userAgentPackageName:
'com.example.app',
minZoom: 12,
),
CurrentLocationLayer(
followCurrentLocationStream:
_followCurrentLocationStreamController
.stream,
followOnLocationUpdate:
_followOnLocationUpdate,
),
],
),
),
),
),
),
Expanded(
child: Container(
padding: const EdgeInsets.all(10),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8),
color: Colors.black.withOpacity(0.5)),
child: Column(
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(
locationName ?? "Loading...",
maxLines: 1,
overflow: TextOverflow.ellipsis,
softWrap: false,
style: const TextStyle(
color: Colors.white,
fontSize: 16,
fontWeight: FontWeight.bold),
),
const SizedBox(
height: 5,
),
Text(
subLocation ?? "Loading ..",
maxLines: 2,
overflow: TextOverflow.ellipsis,
softWrap: false,
style: const TextStyle(
color: Colors.white,
fontSize: 12,
fontWeight: FontWeight.w500),
),
const SizedBox(
height: 5,
),
Text(
"Lat ${latitudeServer ?? "Loading.."}",
maxLines: 2,
overflow: TextOverflow.ellipsis,
softWrap: false,
style: const TextStyle(
color: Colors.white,
fontSize: 12,
fontWeight: FontWeight.w500),
),
const SizedBox(
height: 5,
),
Text(
"Long ${longitudeServer ?? "Loading.."}",
maxLines: 2,
overflow: TextOverflow.ellipsis,
softWrap: false,
style: const TextStyle(
color: Colors.white,
fontSize: 12,
fontWeight: FontWeight.w500),
),
const SizedBox(
height: 5,
),
Text(
dateTime ?? "Loading...",
maxLines: 2,
overflow: TextOverflow.ellipsis,
softWrap: false,
style: const TextStyle(
color: Colors.white,
fontSize: 12,
fontWeight: FontWeight.w500),
),
],
),
),
),
const SizedBox(
width: 10,
)
],
),
),
],
),
),
],
),
);
} else {
return const Center(child: CircularProgressIndicator());
}
},
),
floatingActionButton: FloatingActionButton(
onPressed: () async {
try {
await _initializeControllerFuture;
takeScreenshot();
} catch (e) {
if (kDebugMode) {
print(e);
}
}
},
child: const Icon(Icons.camera_alt),
),
);
}
/// Takes a screenshot of the current screen and saves it as an image file.
/// Returns the file path of the captured image and triggers the [onImageCaptured]
/// callback if provided.
/// Throws an exception if there is an error capturing the screenshot.
Future<void> takeScreenshot() async {
var rng = Random();
// Get the render boundary of the widget
final RenderRepaintBoundary boundary = globalKey.currentContext!.findRenderObject()! as RenderRepaintBoundary;
// Capture the screen as an image
ui.Image image = await boundary.toImage();
final directory = (await getApplicationDocumentsDirectory()).path;
// Convert the image to bytes in PNG format
ByteData? byteData = await image.toByteData(format: ui.ImageByteFormat.png);
Uint8List pngBytes = byteData!.buffer.asUint8List();
// Generate a random file name for the screenshot
File imgFile = File('$directory/screenshot${rng.nextInt(200)}.png');
// Write the bytes to the file
await imgFile.writeAsBytes(pngBytes);
// Check if the file exists
bool isExists = imgFile.existsSync();
if (isExists) {
// Set the file path of the captured image
setState(() {
cameraImagePath = imgFile;
});
// Trigger the image captured callback
if (widget.onImageCaptured != null) {
ImageAndLocationData data = ImageAndLocationData(
imagePath: imgFile.path,
latitude: latitudeServer,
longitude: longitudeServer,
locationName: locationName,
subLocation: subLocation,
);
widget.onImageCaptured!(data);
}
} else {
debugPrint('File does not exist');
}
}
/// Updates the current position by retrieving the latitude, longitude, location name,
/// and sublocation based on the user's device location. Updates the corresponding
/// state variables with the retrieved data.
/// Throws an exception if there is an error retrieving the location information.
Future<void> updatePosition(BuildContext context) async {
try {
// Determine the current position
final position = await _determinePosition();
// Retrieve the placemarks for the current position
final placemarks = await placemarkFromCoordinates(position.latitude, position.longitude);
if (placemarks.isNotEmpty) {
final placemark = placemarks.first;
// Update the state variables with the retrieved location data
setState(() {
latitudeServer = position.latitude.toString();
longitudeServer = position.longitude.toString();
locationName = "${placemark.locality ?? ""}, ${placemark.administrativeArea ?? ""}, ${placemark.country ?? ""}";
subLocation = "${placemark.street ?? ""}, ${placemark.thoroughfare ?? ""} ${placemark.administrativeArea ?? ""}";
});
if (kDebugMode) {
print("Latitude: $latitudeServer, Longitude: $longitudeServer, Location: $locationName");
}
} else {
// Handle case when no placemark is available
setState(() {
latitudeServer = null;
longitudeServer = null;
locationName = 'No Location Data';
subLocation = '';
});
}
} catch (e) {
// Handle any errors that occurred during location retrieval
setState(() {
latitudeServer = null;
longitudeServer = null;
locationName = 'Error Retrieving Location';
subLocation = '';
});
}
}
/// Determines the current position using the Geolocator package.
/// Returns the current position as a [Position] object.
/// Throws an exception if there is an error determining the position or if the necessary permissions are not granted.
Future<Position> _determinePosition() async {
bool serviceEnabled;
LocationPermission permission;
// Check if location services are enabled
serviceEnabled = await Geolocator.isLocationServiceEnabled();
if (!serviceEnabled) {
// If location services are disabled, throw an exception
throw Exception('Location services are disabled.');
}
// Check camera permission
final cameraStatus = await Permission.camera.status;
if (cameraStatus.isDenied || cameraStatus.isPermanentlyDenied) {
// If camera permission is not granted, request it
await Permission.camera.request();
}
// Check location permission
permission = await Geolocator.checkPermission();
if (permission == LocationPermission.denied) {
// If location permission is denied, request it
permission = await Geolocator.requestPermission();
if (permission == LocationPermission.denied) {
// If location permission is still denied, throw an exception
throw Exception('Location permissions are denied');
}
}
// Check if location permission is permanently denied
if (permission == LocationPermission.deniedForever) {
// Throw an exception if location permission is permanently denied
throw Exception('Location permissions are permanently denied, we cannot request permissions.');
}
// Get the current position
return await Geolocator.getCurrentPosition(
desiredAccuracy: LocationAccuracy.best,
);
}
}