react-native-1app/__lib/MapView.js

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

import React, { Component } from 'react';
import { View, StyleSheet, Image, Text, TouchableOpacity, Platform } from 'react-native';
import MapView from "react-native-maps";

export default class ApiMapView extends Component {

  constructor(props) {
    super(props);
    this.state = {
      latitude: props.latitude ? props.latitude : 0.0,
      longitude: props.longitude ? props.longitude : 0.0,
      altitude: props.altitude ? props.altitude : 12
    };
  }

  local() {
    var fator = this.state.altitude * this.state.altitude * (this.state.altitude / 2);
    return {
      latitude: Number(this.state.latitude),
      longitude: Number(this.state.longitude),
      latitudeDelta: 120 / (this.state.altitude * fator), /// 0.122,
      longitudeDelta: 100 / (this.state.altitude * fator) // 0.121
    };
  }

  shouldComponentUpdate(nextProps, nextState) {
    if (nextProps != this.props) {
      nextState.altitude = nextProps.altitude ? nextProps.altitude : 12;
      nextState.latitude = nextProps.latitude ? nextProps.latitude : 0.0;
      nextState.longitude = nextProps.longitude ? nextProps.longitude : 0.0;
      nextState.dataSource = nextProps.dataSource;
      return true;
    }
    return false;
  }

  render() {

    return React.createElement(
      MapView,
      _extends({
        showsUserLocation: true
      }, this.props, {
        region: this.props.region ? this.props.region() : this.local(),
        initialRegion: this.props.region ? this.props.region() : this.local() }),
      this.getViews()
    );
  }

  getViews() {
    if (this.props.children) {
      return this.props.children;
    } else {
      return React.createElement(MapView.Marker, { ref: v => this["cell_0"] = v,
        coordinate: this.props.region ? this.props.region() : this.local() });
    }
  }

}