React-Native-Map-Clustering

Simple module that adds map clustering for both iOS and Android.

Updates:

• 1.2.4 version includes props for maxZoom and cluster radius
• 1.2.3 version uses initial region instead of region for performance

Pre requirements:

• Install 'react-native-maps' module. You can find all information here: https://github.com/airbnb/react-native-maps

In general all you have to do to start:

npm install react-native-maps --save
react-native link react-native-maps

• Minimum versions you need for this module:

  react: >=15.4.0
  react-native >=0.40
  react-native-maps >=0.15.0
  

Installation

All you have to do:

npm install react-native-map-clustering --save

Usage

Usage is very simple:

1. Import MapView

import MapView from 'react-native-map-clustering';

• Import Marker

import { Marker } from 'react-native-maps';

2. Add this to your render method (you can put your own markers and region):

<MapView
    region={{latitude: 52.5, longitude: 19.2,
             latitudeDelta: 8.5, longitudeDelta: 8.5}}
    style={{width: mapWidth, height: mapHeight}}>
    <Marker coordinate={{latitude: 52.0, longitude: 18.2}} />
    <Marker coordinate={{latitude: 52.4, longitude: 18.7}} />
    <Marker coordinate={{latitude: 52.1, longitude: 18.4}} />
    <Marker coordinate={{latitude: 52.6, longitude: 18.3}} />
    <Marker coordinate={{latitude: 51.6, longitude: 18.0}} />
    <Marker coordinate={{latitude: 53.1, longitude: 18.8}} />
    <Marker coordinate={{latitude: 52.9, longitude: 19.4}} />
</MapView>

3. That's all!.

Advanced Usage

• For things like animateToRegion or animateToCoordinate and other methods, all you have to do is to refer to _root in your MapView reference.

Example:

• Create reference to your main MapView.

    <MapView
            ref = {(ref)=>this.mapView=ref}
            ...
    </MapView>

• With this reference you can for example animateToRegion like this:

    animate(){
       let r = {
            latitude: 42.5,
            longitude: 15.2,
            latitudeDelta: 7.5,
            longitudeDelta: 7.5,
        };
        this.mapView.root.animateToRegion(r, 2000);
    }

Advanced Usage #2

If you want to control cluster on click event, here is example of zooming in to your cluster position:

1. Define you zoom animation function:

    animate(coordinate){
       let newRegion = {
            latitude: coordinate.latitude,
            longitude: coordinate.longitude,
            latitudeDelta: this.mapView.state.region.latitudeDelta - this.mapView.state.region.latitudeDelta/2,
            longitudeDelta: this.mapView.state.region.longitudeDelta - this.mapView.state.region.longitudeDelta/2,
        };
        this.mapView.root.animateToRegion(newRegion, 1000);
    }

2. Add onClusterPress prop to your MapView.

    <MapView
        ref = {(ref)=>this.mapView=ref}
        onClusterPress={(coordinate)=>{
            this.animate(coordinate);
        }}
       ...
    </MapView>

Advanced Usage #3

Added in version: 1.2.4

Getting info about markers in selected cluster:

    <MapView
       onClusterPress = {(coordinates,markers)=>{
      console.warn(JSON.stringify(markers))
    }}
       ...
    </MapView>

Advanced Usage #4

Adding custom cluster design: (Added in version 1.1.5)

You can pass prop called customClusterMarkerDesign with you HTML element that will be used as background for cluster.

Example:

    <MapView
        customClusterMarkerDesign =
        {(<Image style = {{width: imageWidth, height:imageHeight}}
        source = {require('./customCluster.png')}/>)}
           ...
    </MapView>

That's all!

Advanced Usage #5

Excluding marker from being clustered at all. (Added in version 1.2.6)

All you have to do is to add 'cluster' prop to marker like this:

 <Marker
     cluster = {false}
     coordinate={{latitude: x, longitude: y}}>
 </Marker>

Extra props to control your clustering

---

Name	Type	Default	Note
clustering	bool	true	Set true to enable and false to disable clustering.
radius	Int	17	Controls range of clustering.
clusterColor	String	#F5F5F5	Background color of cluster.
clusterTextColor	String	#FF5252	Color of text in cluster.
clusterBorderColor	String	#FF5252	Color of border. Set to transparent if you don't want borders.
clusterBorderWidth	Int	1	Width of border. Set to 0 if you don't want borders.
clusterTextSize	Int	18	Text size for clusters.
onClusterPress	Function	null	Allows you to control cluster on click event. Function returns coordinate of cluster.
customClusterMarkerDesign	HTML element	null	Custom background for your clusters.
maxZoom	Int	10	Maximum zoom level at which clusters are generated.
radius	Int	40	Cluster radius, in pixels.

Example of using props:

<MapView
    clustering = {true}
    clusterColor = '#000'
    clusterTextColor = '#fff'
    clusterBorderColor = '#fff'
    clusterBorderWidth = {4}
    maxZoom = {8}
    radius = {50}
    initialRegion={{latitude: 52.5, longitude: 19.2,
             latitudeDelta: 8.5, longitudeDelta: 8.5}}
    style={{width: mapWidth, height: mapHeight}}>
</MapView>

License

MIT