97 lines
3.0 KiB
Dart
97 lines
3.0 KiB
Dart
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// Importált réteg modellje.
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// A GeoJsonParser közvetlenül flutter_map objektumokat gyárt,
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// ezeket csomagoljuk egy kezelhető rétegbe.
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import 'package:flutter_map/flutter_map.dart';
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import 'package:latlong2/latlong.dart';
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import 'package:terepi_seged/enums/layer_import_source_type.dart';
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import 'package:uuid/uuid.dart';
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class ImportedLayer {
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final String id;
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final String name;
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final LayerImportSourceType sourceType;
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// flutter_map objektumok — közvetlenül a réteg widgetekbe kerülnek
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final List<Marker> markers;
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final List<Polyline> polylines;
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final List<Polygon> polygons;
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final bool isVisible;
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final DateTime importedAt;
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const ImportedLayer({
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required this.id,
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required this.name,
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required this.sourceType,
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required this.markers,
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required this.polylines,
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required this.polygons,
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this.isVisible = true,
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required this.importedAt,
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});
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// ── Statisztikák ──────────────────────────────────────────────────
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int get featureCount => markers.length + polylines.length + polygons.length;
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bool get isEmpty => featureCount == 0;
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// ── Bounding box — zoom a rétegre ─────────────────────────────────
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LatLngBounds? get bounds {
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final points = <LatLng>[
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...markers.map((m) => m.point),
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...polylines.expand((p) => p.points),
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...polygons.expand((p) => p.points),
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];
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if (points.isEmpty) return null;
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var minLat = points.first.latitude;
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var maxLat = points.first.latitude;
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var minLon = points.first.longitude;
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var maxLon = points.first.longitude;
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for (final p in points) {
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if (p.latitude < minLat) minLat = p.latitude;
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if (p.latitude > maxLat) maxLat = p.latitude;
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if (p.longitude < minLon) minLon = p.longitude;
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if (p.longitude > maxLon) maxLon = p.longitude;
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}
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return LatLngBounds(
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LatLng(minLat, minLon),
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LatLng(maxLat, maxLon),
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);
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}
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ImportedLayer copyWith({bool? isVisible}) => ImportedLayer(
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id: id,
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name: name,
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sourceType: sourceType,
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markers: markers,
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polylines: polylines,
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polygons: polygons,
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isVisible: isVisible ?? this.isVisible,
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importedAt: importedAt,
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);
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// ── Gyártó: GeoJsonParser kimenetéből ─────────────────────────────
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static ImportedLayer fromGeoJsonParser({
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required dynamic parser, // GeoJsonParser
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required String name,
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LayerImportSourceType source = LayerImportSourceType.geoJson,
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}) {
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return ImportedLayer(
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id: const Uuid().v4(),
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name: name,
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sourceType: source,
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markers: List.from(parser.markers as List),
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polylines: List.from(parser.polylines as List),
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polygons: List.from(parser.polygons as List),
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importedAt: DateTime.now(),
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);
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}
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}
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