flutter_tzh/lib/home/view/YSMapView.dart

import 'dart:convert';
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:flutter_tzh/home/view/YSChooseMapView.dart';
import 'package:mapbox_gl/mapbox_gl.dart';

import '../../tool/YSTools.dart';

class YSMapView extends StatefulWidget {
  final Map location;
  const YSMapView({Key? key, required this.location}) : super(key: key);

  @override
  YSMapViewState createState() => YSMapViewState();
}

class YSMapViewState extends State<YSMapView> with WidgetsBindingObserver{
  MapboxMapController? _mapController;
  LatLng _latLng = const LatLng(0, 0);
  bool _isAgree = false;
  _onMapCreated(MapboxMapController controller) {
    _mapController = controller;
  }
  @override
  void initState() {
    WidgetsBinding.instance.addObserver(this);
    _latLng = LatLng(double.parse('${widget.location['latitude']??0}'), double.parse('${widget.location['longitude']??0}'));
    Future.delayed(const Duration(seconds: 1)).then((value) {
      _getLocation();
    });
    super.initState();
  }

  _getLocation() async{
    _isAgree = await permissionHandler('location');
    setState(() {});
  }
  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    // if(_mapController!=null){
    //   _mapController!.dispose();
    // }
    super.dispose();
  }
  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    if(state==AppLifecycleState.paused){
      setState(() {});
      LogUtil.d('didChangeAppLifecycleState=====paused');
    }
    super.didChangeAppLifecycleState(state);
  }
  void onStyleLoaded(MapboxMapController controller) {
    String geo =  widget.location['coordinates'];
    Map geoMao = jsonDecode(geo);
    List coordinates = geoMao['coordinates']??[];
    List<LatLng> geometryList = [];
    for (List element in coordinates) {
      for (List elementSub in element) {
        geometryList.add(LatLng(elementSub[1], elementSub[0]));
      }
    }
    Future.delayed(const Duration(seconds: 1), () {
      controller.addSymbol(SymbolOptions(
        geometry: _latLng,
        iconImage: "images/Pointer.png",
        textField: widget.location['name'],
        textColor: "#FFFFFF",
        textOffset: const Offset(0, -2),
        textHaloWidth: 2,
        iconSize: 2,
        // textHaloColor: "#4AE6F0",
      ));
      controller.addLine(
        LineOptions(
          geometry: geometryList,
          lineColor: '#FF9900',
          lineWidth: 4
        )
      );
      controller.onSymbolTapped.add((argument) {
        ysShowBottomAlertView(context, YSChooseMapView(latitude: '${_latLng.latitude}', longitude: '${_latLng.longitude}'));
      });
    });
  }
  @override
  Widget build(BuildContext context) {
    return MapboxMap(
      styleString:  MapboxStyles.SATELLITE,
      accessToken: accessToken,
      onMapCreated: _onMapCreated,
      initialCameraPosition: CameraPosition(target: _latLng, zoom: 14.0),
      onStyleLoadedCallback: () => onStyleLoaded(_mapController!),
      scrollGesturesEnabled: true,
      myLocationEnabled: _isAgree,
      attributionButtonMargins: const Point(1000, 0),
      logoViewMargins: const Point(1000, 0),
      // onUserLocationUpdated: (UserLocation location){
      //   LogUtil.d('MapboxMap=======${location.position}');
      //   _mapController!.addSymbol( SymbolOptions(
      //     geometry: location.position,
      //     iconImage: "images/Pointer.png",
      //     textField: widget.location['位置'],
      //     textColor: "#FFFFFF",
      //     textOffset: const Offset(0, -2),
      //     textHaloWidth: 2,
      //     iconSize: 2,
      //     // textHaloColor: "#4AE6F0",
      //   ));
      // },
    );
  }
}