Proj4 refraktorálás a CoordConverterService osztályba. MapController refraktorálás.

lib/main.dart

@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 import 'package:terepi_seged/routes/app_pages.dart';
+import 'package:terepi_seged/services/coord_converter_service.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -13,6 +14,8 @@ Future<void> main() async {
       anonKey:
           'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.ewogICJyb2xlIjogImFub24iLAogICJpc3MiOiAic3VwYWJhc2UiLAogICJpYXQiOiAxNzQwMjY1MjAwLAogICJleHAiOiAxODk4MDMxNjAwCn0.4cMVfAnBLxne1lq0fm94rgtXLBJdRx-0f-E4Jd_jFwI');
 
+  await Get.putAsync(() => CoordConverterService().onInit());
+
   runApp(const MyApp());
 }
 

lib/pages/map/presentation/controllers/map_controller.dart

@@ -29,9 +29,9 @@ import 'package:terepi_seged/gnss_sentences/gngst.dart';
 import 'package:terepi_seged/gnss_sentences/gnrmc.dart';
 import 'package:terepi_seged/models/point_to_measure.dart';
 import 'package:terepi_seged/models/point_with_description_model.dart';
-import 'package:proj4dart/proj4dart.dart' as proj4;
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:terepi_seged/pages/map/presentation/views/measured_points_table_dialog.dart';
+import 'package:terepi_seged/services/coord_converter_service.dart';
 
 class MapViewController extends GetxController {
   // String gpsAddress = "E8:31:CD:14:8B:B2";
@@ -124,7 +124,6 @@ class MapViewController extends GetxController {
   late Directory? directory;
   late File dataFile;
 
-  late proj4.Projection eovProj, wgsProj;
   RxBool mapIsInitialized = false.obs;
 
   // GeoJsonParser parser =
@@ -147,18 +146,7 @@ class MapViewController extends GetxController {
   @override
   void onInit() async {
     super.onInit();
-    final bytes = (await rootBundle.load('assets/Grids/etrs2eov_notowgs.gsb'))
-        .buffer
-        .asUint8List();
-    proj4.Projection.nadgrid('Etrs2Eov', bytes);
-    // var def =
-    //     '+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 +towgs84=52.17,-71.82,-14.9,0,0,0,0 +units=m +nadgrids=@ignorable,Etrs2Eov,null +no_defs';
-    var def =
-        '+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 +towgs84=52.17,-71.82,-14.9,0,0,0,0 +units=m +nadgrids=Etrs2Eov +no_defs';
 
-// Named Projection signature, later find it from anywhere via Projection.get('EPSG:23700')
-    eovProj = proj4.Projection.add('EPSG:23700', def);
-    wgsProj = proj4.Projection.WGS84;
     //Loading, Success, Error handle with 1 line of code
     nmeaDecoder
       ..registerTalkerSentence("GGA", (line) => Gngga(raw: line))
@@ -500,8 +488,8 @@ class MapViewController extends GetxController {
                     pointsToMeasure[pointsToMeasureSelectedValue.value].coordX;
                 double coordY =
                     pointsToMeasure[pointsToMeasureSelectedValue.value].coordY;
-                var eovCoord = proj4.Point(x: coordX, y: coordY);
+                var wgsCoord =
-                var wgsCoord = eovProj.transform(wgsProj, eovCoord);
+                    CoordConverterService.to.eovToWgsPoint(coordX, coordY);
                 distance.value = calculateDistance(
                     LatLng(gpsLatitude.value, gpsLongitude.value),
                     LatLng(wgsCoord.y, wgsCoord.x));
@@ -906,8 +894,8 @@ class MapViewController extends GetxController {
             pointsToMeasure
                 .add(PointToMeasure(id: id, coordX: coordX, coordY: coordY));
 
-            var eovCoord = proj4.Point(x: coordX, y: coordY);
+            var wgsCoord =
-            var wgsCoord = eovProj.transform(wgsProj, eovCoord);
+                CoordConverterService.to.eovToWgsPoint(coordX, coordY);
 
             print("Lat -> ${wgsCoord.x}, Long -> ${wgsCoord.y}");
 
@@ -980,8 +968,7 @@ class MapViewController extends GetxController {
           pointsToMeasure
               .add(PointToMeasure(id: id, coordX: coordX, coordY: coordY));
 
-          var eovCoord = proj4.Point(x: coordX, y: coordY);
+          var wgsCoord = CoordConverterService.to.eovToWgsPoint(coordX, coordY);
-          var wgsCoord = eovProj.transform(wgsProj, eovCoord);
 
           print("Lat -> ${wgsCoord.x}, Long -> ${wgsCoord.y}");
 

lib/services/coord_converter_service.dart

@@ -0,0 +1,37 @@
+import 'package:flutter/services.dart';
+import 'package:get/get.dart';
+import 'package:proj4dart/proj4dart.dart' as proj4;
+
+class CoordConverterService extends GetxService {
+  static CoordConverterService get to => Get.find();
+
+  late proj4.Projection eovProj;
+  late proj4.Projection wgsProj;
+
+  @override
+  Future<void> onInit() async {
+    super.onInit();
+
+    final bytes = (await rootBundle.load('assets/Grids/etrs2eov_notowgs.gsb'))
+        .buffer
+        .asUint8List();
+
+    proj4.Projection.nadgrid('Etrs2Eov', bytes);
+
+    const def =
+        '+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 '
+        '+k_0=0.99993 +x_0=650000 +y_0=200000 +ellps=GRS67 '
+        '+towgs84=52.17,-71.82,-14.9,0,0,0,0 '
+        '+units=m +nadgrids=Etrs2Eov +no_defs';
+
+    eovProj = proj4.Projection.add('EPSG:23700', def);
+    wgsProj = proj4.Projection.WGS84;
+  }
+
+  // Segédmetódusok — nem kötelező, de tisztább
+  proj4.Point wgsToEovPoint(double lon, double lat) =>
+      wgsProj.transform(eovProj, proj4.Point(x: lon, y: lat));
+
+  proj4.Point eovToWgsPoint(double y, double x) =>
+      eovProj.transform(wgsProj, proj4.Point(x: y, y: x));
+}