cargo66/lib/presentation/widgets/map/clustering.dart

import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_map_marker_cluster/flutter_map_marker_cluster.dart';
import 'package:latlong2/latlong.dart';

class ClusteringPage extends StatefulWidget {
  static const String route = 'clusteringPage';

  const ClusteringPage({super.key});

  @override
  State<ClusteringPage> createState() => _ClusteringPageState();
}

class _ClusteringPageState extends State<ClusteringPage> {
  final PopupController _popupController = PopupController();

  late List<Marker> markers;
  late int pointIndex;
  List<LatLng> points = [
    const LatLng(37.90970, 58.39795),
    const LatLng(37.90491, 58.39742),
  ];

  @override
  void initState() {
    pointIndex = 0;
    markers = [
      Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: points[pointIndex],
        child: const Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
      const Marker(
        alignment: Alignment.center,
        height: 30,
        width: 30,
        point: LatLng(49.8566, 3.3522),
        child: Icon(Icons.pin_drop),
      ),
    ];

    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          pointIndex++;
          if (pointIndex >= points.length) {
            pointIndex = 0;
          }
          setState(() {
            markers[0] = Marker(
              point: points[pointIndex],
              alignment: Alignment.center,
              height: 30,
              width: 30,
              child: const Icon(Icons.pin_drop),
            );
            markers = List.from(markers);
          });
        },
        child: const Icon(Icons.refresh),
      ),
      body: PopupScope(
        popupController: _popupController,
        child: FlutterMap(
          options: MapOptions(
            initialCenter: points[0],
            initialZoom: 4.5,
            maxZoom: 45,
            onTap: (_, __) => _popupController.hideAllPopups(), // Hide popup when the map is tapped.
          ),
          children: <Widget>[
            TileLayer(
              urlTemplate: 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
              subdomains: const ['a', 'b', 'c'],
            ),
            MarkerClusterLayerWidget(
              options: MarkerClusterLayerOptions(
                spiderfyCircleRadius: 80,
                spiderfySpiralDistanceMultiplier: 2,
                circleSpiralSwitchover: 12,
                maxClusterRadius: 120,
                rotate: true,
                size: const Size(40, 40),
                alignment: Alignment.center,
                padding: const EdgeInsets.all(50),
                maxZoom: 15,
                markers: markers,
                polygonOptions: const PolygonOptions(
                  borderColor: Colors.blueAccent,
                  color: Colors.black12,
                  borderStrokeWidth: 3,
                ),
                popupOptions: PopupOptions(
                  popupSnap: PopupSnap.markerTop,
                  popupController: _popupController,
                  popupBuilder: (_, marker) => Container(
                    width: 200,
                    height: 100,
                    color: Colors.white,
                    child: GestureDetector(
                      onTap: () => debugPrint('Popup tap!'),
                      child: const Text(
                        'Container popup for marker',
                      ),
                    ),
                  ),
                ),
                builder: (context, markers) {
                  return Container(
                    decoration: BoxDecoration(
                      borderRadius: BorderRadius.circular(20),
                      color: Colors.blue,
                    ),
                    child: Center(
                      child: Text(
                        markers.length.toString(),
                        style: const TextStyle(color: Colors.white),
                      ),
                    ),
                  );
                },
              ),
            ),
            PolylineLayer(
              polylineCulling: true,
              polylines: [
                Polyline(
                  points: [
                    // const LatLng(51.5, -0.09),
                    // const LatLng(49.8566, 3.3522),
                    // const LatLng(49.8566, 1.3522),
                    // const LatLng(47.8566, 1.3522),
                    // const LatLng(47.8566, 5.3522),
                    // const LatLng(44.8566, 5.3522),
                    // const LatLng(49.8566, 12.3522),
                    // const LatLng(49.8864, 13.4522),
                    // const LatLng(49.8966, 13.6522),
                    const LatLng(37.90970, 58.39795),
                    const LatLng(37.90491, 58.39742)
                  ],
                  borderStrokeWidth: 6.6,
                  color: Colors.red,
                  borderColor: Colors.green,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}