CODEWITHSUNDEEP
reactjstypescriptleafletopenstreetmapreact-leaflet
sandy
sandy

Reputation: 303

Custom button on the leaflet map with React-leaflet version3

I'm a new leaflet learner with React typescript. Want to create a custom button on the map. On clicking the button a popup will appear. I saw many example but they are all based on older version and I also tried to create my own but no luck. The documentation also not providing much help. Even a functional custom control component is also very effective for my app. Any help on this will be much appreciated. Here is my code,

Custom button

import React, { Component } from "react";
import { useMap } from "react-leaflet";
import L, { LeafletMouseEvent, Map } from "leaflet";

class Description extends React.Component<{props: any}> {
  createButtonControl() {
    const MapHelp = L.Control.extend({
      onAdd: (map : Map) => {
        const helpDiv = L.DomUtil.create("button", ""); //how to pass here the button name and
        //other property ?
        
        //a bit clueless how to add a click event listener to this button and then
        // open a popup div on the map

      }
     
    });
    return new MapHelp({ position: "bottomright" });
  }

  componentDidMount() {
    const { map } = this.props as any;
    const control = this.createButtonControl();
    control.addTo(map);
  }

  render() {
    return null;
  }
}

function withMap(Component : any) {
  return function WrappedComponent(props : any) {
    const map = useMap();
    return <Component {...props} map={map} />;
  };
}

export default withMap(Description);

The way I want to call it

<MapContainer
        center={defaultPosition}
        zoom={6}
        zoomControl={false}
        >
             <Description />
            

             <TileLayer
                attribution="Map tiles by Carto, under CC BY 3.0. Data by OpenStreetMap, under ODbL."
                url="https://cartodb-basemaps-{s}.global.ssl.fastly.net/light_all/{z}/{x}/{y}.png"
            />
            <ZoomControl position={'topright'}/>
        </MapContainer>

Upvotes: 3

Views: 8126

Answers (1)

Seth Lutske
Seth Lutske

Reputation: 10696

You're close. Sticking with the class component, you just need to continue creating your buttons instance. You can use a prop on Description to determine what your button will say and do:

      <Description
        title={"My Button Title"}
        markerPosition={[20.27, -157]}
        description="This is a custom description!"
      />

In your decsription's createButtonControl, you're almost there. You just need to fill it out a bit:

createButtonControl() {
    const MapHelp = L.Control.extend({
      onAdd: (map) => {
        const helpDiv = L.DomUtil.create("button", "");
        this.helpDiv = helpDiv;
        // set the inner content from the props
        helpDiv.innerHTML = this.props.title;

        // add the event listener that will create a marker on the map
        helpDiv.addEventListener("click", () => {
          console.log(map.getCenter());
          const marker = L.marker()
            .setLatLng(this.props.markerPosition)
            .bindPopup(this.props.description)
            .addTo(map);

          marker.openPopup();
        });
 
        // return the button div
        return helpDiv;
      }
    });
    return new MapHelp({ position: "bottomright" });
  }

Working codesandbox

There's a million ways to vary this, but hopefully that will get you going.

Upvotes: 4

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