map_viewer_widget 0.0.6

MapViewerWidget is a FlutterMap display widget. It will be the base of the map application.

example/lib/main.dart

import 'package:example/osm_bright_ja_style.dart';
import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:latlong2/latlong.dart';
import 'package:map_viewer_widget/map_viewer_widget.dart';
import 'package:vector_map_tiles/vector_map_tiles.dart';
import 'package:vector_tile_renderer/vector_tile_renderer.dart';
import 'package:vector_tile_renderer/vector_tile_renderer.dart' as vtr;

// import 'api_key.dart';

void main() {
  runApp(
    const ProviderScope(
      child: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'MapViewerWidget Example',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'MapViewerWidget Example'),
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({super.key, required this.title});
  final String title;
  final mapController = MapController();
  @override
  Widget build(BuildContext context) {
    // final sc = NavigationStatatusStreamController.streamController;
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(title),
      ),
      body: SafeArea(
        child: Stack(
          children: [
            MapViewerWidget(
              options: MapOptions(
                center: LatLng(39.640278, 141.946572),
                zoom: 18,
                maxZoom: 18,
              ),
              mapController: mapController,
              // Specify the visible layer as children
              children: [
                VectorTileLayer(
                  theme: _mapTheme(context),
                  tileProviders: TileProviders(
                    {'openmaptiles': _cachingTileProvider(_urlTemplate())},
                  ),
                ),
              ],
            ),
            // When adding custom buttons
            Positioned(
              right: 20,
              bottom: 120,
              child: Consumer(
                builder: (context, ref, child) {
                  var text = 'none';
                  final navigationStatus =
                      ref.watch(mapViewerStateNotiferProvider).navigationStatus;
                  switch (navigationStatus) {
                    case NavigationStatus.headUp:
                      text = 'headUp';
                      break;
                    case NavigationStatus.northUp:
                      text = 'northUp';
                      break;
                    case NavigationStatus.none:
                      text = 'none';
                      break;
                  }
                  return FloatingActionButton(
                    child: Text(
                      text,
                      style: const TextStyle(
                        fontSize: 10,
                      ),
                    ),
                    onPressed: () {
                      ref
                          .read(mapViewerStateNotiferProvider.notifier)
                          .setNavigationStatus(
                            navigationStatus: NavigationStatus.northUp,
                            mapController: mapController,
                          );
                    },
                  );
                },
              ),
            )
          ],
        ),
      ),
    );
  }

  vtr.Theme _mapTheme(BuildContext context) {
    // maps are rendered using themes
    // to provide a dark theme do something like this:
    // if (MediaQuery.of(context).platformBrightness == Brightness.dark)
    // return myDarkTheme();
    // return ProvidedThemes.lightTheme();
    return ThemeReader().read(osmBrightJaStyle());
    // return ThemeReader().read(lightThemeData());
  }

  VectorTileProvider _cachingTileProvider(String urlTemplate) {
    return MemoryCacheVectorTileProvider(
      delegate: NetworkVectorTileProvider(
        urlTemplate: urlTemplate,
        // this is the maximum zoom of the provider, not the
        // maximum of the map. vector tiles are rendered
        // to larger sizes to support higher zoom levels
        maximumZoom: 14,
      ),
      maxSizeBytes: 1024 * 1024 * 2,
    );
  }

  String _urlTemplate() {
    // Stadia Maps source https://docs.stadiamaps.com/vector/
    // return 'https://tiles.stadiamaps.com/data/openmaptiles/{z}/{x}/{y}.pbf?api_key=$apiKey';

    return 'https://tile.openstreetmap.jp/data/planet/{z}/{x}/{y}.pbf';

    // Mapbox source https://docs.mapbox.com/api/maps/vector-tiles/#example-request-retrieve-vector-tiles
    // return 'https://api.mapbox.com/v4/mapbox.mapbox-streets-v8/{z}/{x}/{y}.mvt?access_token=$apiKey',
  }
}