Center AND zoom by prop in react-google-maps? - reactjs

Question

I am building a Zillow-like map with real estate property points in page body, and filters in page header.
What I need is to center AND zoom react-google-maps map, when selecting Google place from external Google places filter. Currently I am able to center map on place select, but not zoom in (that is because i need to refetch data on every zoom in/out, so need to control zoom, see code below).
I tried to use fitBounds from here, but ref in my code is always undefined.
I have API that fetches points, based on filters, with params like this:
viewPort: {
northEast: { lat: 57.04834755670983, lng: 24.3255340332031 },
southWest: { lat: 56.83635114109457, lng: 23.93826596679685 }
},
priceMin: 0,
priceMax: 500,
propType: "RENT",
numRooms: 3,
...
In header section there is also address filter input, that has Google places autocomplete. When selected, Google provides info about place:
"geometry" : {
...
"viewport" : {
"northeast" : {
"lat" : 56.95662478029149,
"lng" : 24.2054917802915
},
"southwest" : {
"lat" : 56.9539268197085,
"lng" : 24.2027938197085
}
}
...
Here is my Map component:
import React, { Component } from 'react';
import { compose, withProps, withState, withHandlers } from "recompose";
import {
withGoogleMap,
GoogleMap,
Marker,
} from "react-google-maps";
import { MarkerClusterer } from "react-google-maps/lib/components/addons/MarkerClusterer";
const defaultMapOptions = {
fullscreenControl: false,
streetViewControl: false,
};
const PropertyMap = compose(
withProps({
loadingElement: <div>Loading...</div>,
containerElement: <div style={{ height: "500px" }} />,
mapElement: <div style={{ height: `100%` }} />,
}),
withState('zoom', 'onZoomChange', 11),
withHandlers(() => {
const refs = {
map: undefined,
}
return {
onMapMounted: () => ref => {
refs.map = ref
},
onZoomChanged: ({ onZoomChange, onMapBoundsChange }) => () => {
onZoomChange(refs.map.getZoom())
onMapBoundsChange(refs.map.getBounds());
},
onDragEnd: ({ onMapBoundsChange }) => () => {
onMapBoundsChange(refs.map.getBounds());
},
onMarkerClustererClick: () => (markerClusterer) => {
const clickedMarkers = markerClusterer.getMarkers()
console.log(`Current clicked markers length: ${clickedMarkers.length}`)
console.log(clickedMarkers)
}
}
}),
withGoogleMap
)(props =>
<GoogleMap
defaultCenter={props.defaultCenter ? props.defaultCenter : { lat: 56.9425, lng: 24.1319 }}
zoom={props.zoom}
ref={props.onMapMounted}
onZoomChanged={props.onZoomChanged}
onDragEnd={props.onDragEnd}
defaultOptions={defaultMapOptions}
>
<MarkerClusterer
onClick={props.onMarkerClustererClick}
averageCenter
enableRetinaIcons
gridSize={60}
key={props.mapUid}
>
{props.features !== null && props.features.map(feature => {
const coord = { lng: feature.geometry.coordinates[0], lat: feature.geometry.coordinates[1] };
return <Marker key={feature.id} position={coord} />;
})}
</MarkerClusterer>
</GoogleMap>
);
export default PropertyMap;
So I think I would like to make it possible to pass zoom param in props, like this:
<PropertyMap
mapUid={this.state.mapUid}
features={this.state.features}
key={this.state.defaultCenter ? `${this.state.defaultCenter.lat}` : '1'}
defaultCenter={this.state.defaultCenter}
defaultZoom={calculateZoomFromViewPort(this.state.viewPort)}
onMapBoundsChange={this.handleMapBoundsChange}
/>
This way I could calculateZoomFromViewPort(this.state.viewPort), but then I need to somehow set it to withState zoom default value.
So what I need is some how pass default zoom value to withState('zoom', 'onZoomChange', 11), (11 is hardcoded, currently). But I am new to recompose package, but is it heavily used in react-google-maps package examples.
If you have other ideas, how to zoom and center map based on viewport & center params from Google place, please share!

Answer 1

fitbounds() is the recommended way to achieve auto zoom. Remember refs always created after first render of the component. I have made changes in your code by adding fitBounds. There might be few syntax errors as I prefer to use react-google-maps like class based utility wrapper. It's easier to manage with redux and component lifecycles. Below is the latest code:
import React, { Component } from 'react';
import { compose, withProps, withState, withHandlers } from "recompose";
import {
withGoogleMap,
GoogleMap,
Marker,
} from "react-google-maps";
import { MarkerClusterer } from "react-google-maps/lib/components/addons/MarkerClusterer";
const defaultMapOptions = {
fullscreenControl: false,
streetViewControl: false,
};
const PropertyMap = compose(
withProps({
loadingElement: <div>Loading...</div>,
containerElement: <div style={{ height: "500px" }} />,
mapElement: <div style={{ height: `100%` }} />,
}),
withState('zoom', 'onZoomChange', 11),
withHandlers(() => {
const refs = {
map: undefined,
}
return {
onMarkersUpdate: ()=> () => {
if(refs.map){
const mapBounds = new google.maps.LatLngBounds();
//just add markers position into mapBounds
markers.forEach((marker)=>{
mapBounds.extend(marker.position)
});
this.refs.map.fitBounds(mapBbounds);
}
},
onZoomChanged: ({ onZoomChange, onMapBoundsChange }) => () => {
onZoomChange(refs.map.getZoom())
onMapBoundsChange(refs.map.getBounds());
},
onDragEnd: ({ onMapBoundsChange }) => () => {
onMapBoundsChange(refs.map.getBounds());
},
onMarkerClustererClick: () => (markerClusterer) => {
const clickedMarkers = markerClusterer.getMarkers()
console.log(`Current clicked markers length: ${clickedMarkers.length}`)
console.log(clickedMarkers)
}
}
}),
withGoogleMap
)(props =>
<GoogleMap
defaultCenter={props.defaultCenter ? props.defaultCenter : { lat: 56.9425, lng: 24.1319 }}
zoom={props.zoom}
ref='map'
onZoomChanged={props.onZoomChanged}
onDragEnd={props.onDragEnd}
defaultOptions={defaultMapOptions}
>
{props.onMarkersUpdate()}
<MarkerClusterer
onClick={props.onMarkerClustererClick}
averageCenter
enableRetinaIcons
gridSize={60}
key={props.mapUid}
>
{props.features !== null && props.features.map(feature => {
const coord = { lng: feature.geometry.coordinates[0], lat: feature.geometry.coordinates[1] };
return <Marker key={feature.id} position={coord} />;
})}
</MarkerClusterer>
</GoogleMap>
);
export default PropertyMap;
Please feel free to react out me. If you make a codesandbox for this. It will be easier to fix syntax errors. And Don't miss out fitbounds(). It makes things easier for us.