我究竟在哪里调用 fitBounds 或 map.fitbounds。一旦我有界限或如何使用它，我很困惑把它放在哪里。我已将边界设置为本地边界状态。
我在react-google-maps 看过这篇文章：如何使用 fitBounds、panBy、panTo、panToBounds 公共 API？要么我只是做不同的事，要么是因为它对我来说没什么用。
我创建了一个boundsconst ，然后每次制作标记时，我都会将其中的每一个添加到边界中bounds.extends(Marker in here)
代码有点乱，所以我会指出我在哪里做的。在里面filterItemsByRadius是我创建和设置边界的地方。在 map 函数的末尾，我认为将边界状态设置为边界。
/* global google */
import { default as React, Component } from 'react';
import raf from 'raf';
import canUseDOM from 'can-use-dom';
import { connect } from 'react-redux';
import { Link } from 'react-router';
import {
withGoogleMap,
GoogleMap,
Circle,
InfoWindow,
Marker,
withScriptjs,
} from 'react-google-maps';
import geolib from 'geolib';
import { geolocated } from 'react-geolocated';
import ItemList from './ItemList';
import { Col } from 'react-bootstrap';
import Paper from 'material-ui/Paper';
import Img from 'react-image';
import RaisedButton from 'material-ui/RaisedButton';
import FontIcon from 'material-ui/FontIcon';
import CreateRadius from './CreateRadius';
import offerActions from '../../redux/actions/offerActions';
const googleMapURL =
'https://maps.googleapis.com/maps/api/js?libraries=places,geometry&key=AIzaSyA7XEFRxE4Lm28tAh44M_568fCLOP_On3k';
const isJson = str => {
try {
JSON.parse(str);
} catch (e) {
return false;
}
return true;
};
const GeolocationGoogleMap = withScriptjs(
withGoogleMap(props => (
<GoogleMap defaultZoom={6} zoom={props.zoom} center={props.center} onClick={props.onMapClick}>
{props.center && (
<Marker
position={props.center}
title={"User's Location"}
options={{ icon: require('./assets/blueDot.png') }}
>
{props.showCenterInfo && (
<InfoWindow>
<div>User's Location</div>
</InfoWindow>
)}
</Marker>
)}
{/* <Circle
center={props.center}
radius={props.zoom}
options={{
fillColor: 'red',
fillOpacity: 0.2,
strokeColor: 'red',
strokeOpacity: 1,
strokeWeight: 1,
}}
/> */}
{props.markers.map((marker, index) => {
const onClick = () => props.onMarkerClick(marker);
const onCloseClick = () => props.onCloseClick(marker);
return (
<Marker
key={index}
position={marker.position}
title={marker.number.toString()}
onClick={onClick}
options={{ icon: 'https://image.ibb.co/evMHxF/shopping_zone_marker_1.png' }}
>
{marker.showInfo && (
<InfoWindow onCloseClick={onCloseClick}>
<div>
<ItemList marker={marker} />
</div>
</InfoWindow>
)}
</Marker>
);
})}
</GoogleMap>
)),
);
class OfferMap extends Component {
constructor(props) {
super(props);
this.state = {
currentPosition: null,
center: null,
content: null,
radius: 15, // ACZ --> put this const in config_env.
showCenterInfo: true,
markers: [],
zoom: 6,
bounds: null,
};
this.handleMarkerClick = this.handleMarkerClick.bind(this);
this.handleCloseClick = this.handleCloseClick.bind(this);
this.handleMapClick = this.handleMapClick.bind(this);
this.filterItemsByRadius = this.filterItemsByRadius.bind(this);
this.radiusChange = this.radiusChange.bind(this);
this.zoomChange = this.zoomChange.bind(this);
}
componentWillReceiveProps(props) {
if (props.coords && !props.coords.positionError) {
this.setState({ center: { lat: props.coords.latitude, lng: props.coords.longitude } });
} else {
fetch('http://ip-api.com/json')
.then(res => res.json())
.then(data => {
this.setState({ center: { lat: data.lat, lng: data.lon } });
})
.catch(error => {
this.setState({ content: `Error: The Geolocation service failed (${error.message}).` });
});
}
this.setState({ markers: props.items });
}
handleMapClick() {
this.setState({ showCenterInfo: false });
}
handleMarkerClick(targetMarker) {
this.setState({
markers: this.state.markers.map(marker => {
if (marker._id === targetMarker._id) {
return {
...marker,
showInfo: true,
};
}
return marker;
}),
});
}
handleCloseClick(targetMarker) {
this.setState({
markers: this.state.markers.map(marker => {
if (marker._id === targetMarker._id) {
return {
...marker,
showInfo: false,
};
}
return marker;
}),
});
}
filterItemsByRadius(userRadius) {
const items = this.state.markers;
const markers = [];
const bounds = new google.maps.LatLngBounds();
items.map((item, i) => {
let itemGeolocation;
let itemDescription = 'NO DESCRIPTION';
let itemThumb;
// Should be ready - tbaustinedit
if (item) {
itemDescription = item.description;
itemThumb = item.media.mediaVault[item.media.defaultIdx] || {
mediaType: 'txt',
};
}
if (item.geolocation) {
itemGeolocation = item.geolocation.coords;
}
if (this.state.center) {
const currentLocation = {
latitude: this.state.center.lat,
longitude: this.state.center.lng,
};
const distanceArr = geolib.orderByDistance(currentLocation, [itemGeolocation]);
const miles = (distanceArr[0].distance / 1609.34).toFixed(2);
if (miles <= userRadius) {
const loc = new google.maps.LatLng(itemGeolocation.lat, itemGeolocation.lng);
bounds.extends(loc);
markers.push({
_id: item._id,
position: itemGeolocation,
number: i,
content: itemDescription,
price: item.price,
quantity: item.quantity,
currency: item.currency,
category: item.category,
title: item.title,
offer: item.offer,
thumbnail: itemThumb,
showInfo: item.showInfo || false,
});
}
}
});
this.setState({
bounds,
});
return markers;
}
radiusChange(event) {
console.log(event.target.value);
this.setState({
radius: event.target.value,
});
const { filter } = this.props.offers;
filter.radius = event.target.value;
this.props.sortOffersNew(filter);
}
zoomChange(e) {
console.log('value', e.target.value);
this.setState({ zoom: Number(e.target.value) });
}
render() {
const markers = this.filterItemsByRadius(this.state.radius);
return (
<Col xs={12} smOffset={0} mdOffset={0}>
<div>
<div style={{ fontFamily: 'Roboto', fontStyle: 'normal' }}>
Offers within radius of: {' '}
<input type="text" defaultValue={this.state.radius} onChange={this.radiusChange} /> {' '}
miles
<br />
</div>
{/* <CreateRadius
radiusChange={this.radiusChange}
numOffers={markers.length}
initRadius={this.state.zoom}
/> */}
</div>
<br />
<div
style={{
width: '100%',
height: '500px',
}}
>
<GeolocationGoogleMap
googleMapURL={googleMapURL}
loadingElement={<div style={{ height: '100%' }} />}
containerElement={<div style={{ height: '100%' }} />}
mapElement={<div style={{ height: '100%' }} />}
center={this.state.center}
showCenterInfo={this.state.showCenterInfo}
content={this.state.content}
radius={this.state.radius}
onMapClick={this.handleMapClick}
onMarkerClick={this.handleMarkerClick}
onCloseClick={this.handleCloseClick}
markers={markers}
zoom={this.state.zoom}
bounds={this.state.bounds}
/>
</div>
</Col>
);
}
}
function mapStateToProps({ browser, offers }) {
return { browser, offers };
}
const dispatchToProps = dispatch => ({
sortOffersNew: filter => dispatch(offerActions.sortOffers(filter)),
});
export default connect(mapStateToProps, dispatchToProps)(
geolocated({
positionOptions: {
enableHighAccuracy: false,
},
userDecisionTimeout: 5000,
})(OfferMap),
);