Kml, kmz és geojson import és térképi megjelnítésük.

2026-06-21 10:07:35 +02:00
parent 0828630a5b
commit 7c29bc7ae5
14 changed files with 1095 additions and 13 deletions
@@ -0,0 +1,96 @@
+// Importált réteg modellje.
+// A GeoJsonParser közvetlenül flutter_map objektumokat gyárt,
+// ezeket csomagoljuk egy kezelhető rétegbe.
+
+import 'package:flutter_map/flutter_map.dart';
+import 'package:latlong2/latlong.dart';
+import 'package:terepi_seged/enums/layer_import_source_type.dart';
+import 'package:uuid/uuid.dart';
+
+class ImportedLayer {
+  final String id;
+  final String name;
+  final LayerImportSourceType sourceType;
+
+  // flutter_map objektumok — közvetlenül a réteg widgetekbe kerülnek
+  final List<Marker> markers;
+  final List<Polyline> polylines;
+  final List<Polygon> polygons;
+
+  final bool isVisible;
+  final DateTime importedAt;
+
+  const ImportedLayer({
+    required this.id,
+    required this.name,
+    required this.sourceType,
+    required this.markers,
+    required this.polylines,
+    required this.polygons,
+    this.isVisible = true,
+    required this.importedAt,
+  });
+
+  // ── Statisztikák ──────────────────────────────────────────────────
+
+  int get featureCount => markers.length + polylines.length + polygons.length;
+
+  bool get isEmpty => featureCount == 0;
+
+  // ── Bounding box — zoom a rétegre ─────────────────────────────────
+
+  LatLngBounds? get bounds {
+    final points = <LatLng>[
+      ...markers.map((m) => m.point),
+      ...polylines.expand((p) => p.points),
+      ...polygons.expand((p) => p.points),
+    ];
+    if (points.isEmpty) return null;
+
+    var minLat = points.first.latitude;
+    var maxLat = points.first.latitude;
+    var minLon = points.first.longitude;
+    var maxLon = points.first.longitude;
+
+    for (final p in points) {
+      if (p.latitude < minLat) minLat = p.latitude;
+      if (p.latitude > maxLat) maxLat = p.latitude;
+      if (p.longitude < minLon) minLon = p.longitude;
+      if (p.longitude > maxLon) maxLon = p.longitude;
+    }
+
+    return LatLngBounds(
+      LatLng(minLat, minLon),
+      LatLng(maxLat, maxLon),
+    );
+  }
+
+  ImportedLayer copyWith({bool? isVisible}) => ImportedLayer(
+        id: id,
+        name: name,
+        sourceType: sourceType,
+        markers: markers,
+        polylines: polylines,
+        polygons: polygons,
+        isVisible: isVisible ?? this.isVisible,
+        importedAt: importedAt,
+      );
+
+  // ── Gyártó: GeoJsonParser kimenetéből ─────────────────────────────
+
+  static ImportedLayer fromGeoJsonParser({
+    required dynamic parser, // GeoJsonParser
+    required String name,
+    LayerImportSourceType source = LayerImportSourceType.geoJson,
+  }) {
+    return ImportedLayer(
+      id: const Uuid().v4(),
+      name: name,
+      sourceType: source,
+      markers: List.from(parser.markers as List),
+      polylines: List.from(parser.polylines as List),
+      polygons: List.from(parser.polygons as List),
+      importedAt: DateTime.now(),
+    );
+  }
+}