Created
September 20, 2016 08:59
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componentWillReceiveProps(nextProps) { | |
if (nextProps.lastRequestedUserLocationAt > this.props.lastRequestedUserLocationAt) { | |
this.centerMapToUser(nextProps.currentLocation); | |
} | |
if (nextProps.lastUpdated > this.props.lastUpdated) { | |
const markers = this.createMarkersForLocations(nextProps); | |
if (markers && Object.keys(markers)) { | |
const clusters = {}; | |
Object.keys(markers).forEach(categoryKey => { | |
// Recalculate cluster trees | |
const cluster = supercluster({ | |
radius: 60, | |
maxZoom: 16, | |
}); | |
cluster.load(markers[categoryKey]); | |
clusters[categoryKey] = cluster; | |
}); | |
this.setState({ | |
clusters | |
}); | |
} | |
} | |
} | |
getZoomLevel(region = this.state.region) { | |
// http://stackoverflow.com/a/6055653 | |
const angle = region.longitudeDelta; | |
// 0.95 for finetuning zoomlevel grouping | |
return Math.round(Math.log(360 / angle) / Math.LN2); | |
} | |
createMarkersForRegion() { | |
const padding = 0.25; | |
if (this.state.clusters && this.state.clusters[this.props.selectedOfferType]) { | |
const markers = this.state.clusters[this.props.selectedOfferType].getClusters([ | |
this.state.region.longitude - (this.state.region.longitudeDelta * (0.5 + padding)), | |
this.state.region.latitude - (this.state.region.latitudeDelta * (0.5 + padding)), | |
this.state.region.longitude + (this.state.region.longitudeDelta * (0.5 + padding)), | |
this.state.region.latitude + (this.state.region.latitudeDelta * (0.5 + padding)), | |
], this.getZoomLevel()); | |
return markers.map(marker => this.renderMarker(marker)); | |
} | |
return []; | |
} |
Do you know how to implement it with react-native-maps ? thx
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For those who want to install super cluster this is the command
npm install git+ssh://github.com/mapbox/supercluster --save