Change a layer's color with buttons | Mapbox GL JS

This example uses setPaintProperty to change the colors of different fill layers on a map:

The water and building layers use the Mapbox Streets v8 vector tileset from the Mapbox Light style (light-v10) as a vector source.
The triangles custom layer, added with addLayer, uses a custom tileset (examples.ckv9z0wgf5v7c27p7me2mf0l9-9wrve) as a vector source.

JavaScript

React

JavaScript

React


<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Change a layer's color with buttons</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
    .map-overlay {
        font:
            12px/20px 'Helvetica Neue',
            Arial,
            Helvetica,
            sans-serif;
        position: absolute;
        width: 200px;
        top: 0;
        left: 0;
        padding: 10px;
    }

    .map-overlay .map-overlay-inner {
        background-color: #fff;
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
        border-radius: 3px;
        padding: 10px;
        margin-bottom: 10px;
    }

    .map-overlay-inner fieldset {
        border: none;
        padding: 0;
        margin: 0 0 10px;
    }

    .map-overlay-inner fieldset:last-child {
        margin: 0;
    }

    .map-overlay-inner select {
        width: 100%;
    }

    .map-overlay-inner label {
        display: block;
        font-weight: bold;
        margin: 0 0 5px;
    }

    .map-overlay-inner button {
        display: inline-block;
        width: 36px;
        height: 20px;
        border: none;
        cursor: pointer;
    }

    .map-overlay-inner button:focus {
        outline: none;
    }

    .map-overlay-inner button:hover {
        box-shadow: inset 0 0 0 3px rgba(0, 0, 0, 0.1);
    }
</style>

<div id="map"></div>
<div class="map-overlay top">
    <div class="map-overlay-inner">
        <fieldset>
            <label>Select layer</label>
            <select id="layer" name="layer">
                <!-- Each value matches a layer ID. -->
                <option value="water">Water</option>
                <option value="building">Buildings</option>
                <option value="triangles">Triangles</option>
            </select>
        </fieldset>
        <fieldset>
            <label>Choose a color</label>
            <div id="swatches"></div>
        </fieldset>
    </div>
</div>

<script>
	// TO MAKE THE MAP APPEAR YOU MUST
	// ADD YOUR ACCESS TOKEN FROM
	// https://account.mapbox.com
	mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';
    const map = new mapboxgl.Map({
        container: 'map',
        // Choose from Mapbox's core styles, or make your own style with Mapbox Studio
        style: 'mapbox://styles/mapbox/light-v11', // style URL for Mapbox Light
        center: [12.338, 45.4385],
        zoom: 18
    });

    map.on('load', () => {
        // Add a custom layer that uses
        // a vector tileset source.
        map.addLayer({
            id: 'triangles',
            source: {
                type: 'vector',
                url: 'mapbox://examples.ckv9z0wgf5v7c27p7me2mf0l9-9wrve' // custom tileset
            },
            'source-layer': 'triangles',
            type: 'fill'
        });
    });

    const swatches = document.getElementById('swatches');
    const layer = document.getElementById('layer');
    const colors = [
        '#ffffcc',
        '#a1dab4',
        '#41b6c4',
        '#2c7fb8',
        '#253494',
        '#fed976',
        '#feb24c',
        '#fd8d3c',
        '#f03b20',
        '#bd0026'
    ];

    for (const color of colors) {
        const swatch = document.createElement('button');
        swatch.style.backgroundColor = color;
        swatch.addEventListener('click', () => {
            map.setPaintProperty(layer.value, 'fill-color', color);
        });
        swatches.appendChild(swatch);
    }
</script>

</body>
</html>

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

JavaScript

React


import React, { useEffect, useRef, useState } from 'react';
import mapboxgl from 'mapbox-gl';
import 'mapbox-gl/dist/mapbox-gl.css';

const MapboxExample = () => {
  const mapContainerRef = useRef();
  const mapRef = useRef();

  const [layer, setLayer] = useState();

  const colors = [
    '#ffffcc',
    '#a1dab4',
    '#41b6c4',
    '#2c7fb8',
    '#253494',
    '#fed976',
    '#feb24c',
    '#fd8d3c',
    '#f03b20',
    '#bd0026'
  ];

  const handleClick = (color) => {
    mapRef.current.setPaintProperty(layer, 'fill-color', color);
  };

  useEffect(() => {
    // TO MAKE THE MAP APPEAR YOU MUST
    // ADD YOUR ACCESS TOKEN FROM
    // https://account.mapbox.com
    mapboxgl.accessToken = 'YOUR_MAPBOX_ACCESS_TOKEN';

    mapRef.current = new mapboxgl.Map({
      container: mapContainerRef.current,
      style: 'mapbox://styles/mapbox/light-v11',
      center: [12.338, 45.4385],
      zoom: 18
    });

    mapRef.current.on('load', () => {
      mapRef.current.addLayer({
        id: 'triangles',
        source: {
          type: 'vector',
          url: 'mapbox://examples.ckv9z0wgf5v7c27p7me2mf0l9-9wrve'
        },
        'source-layer': 'triangles',
        type: 'fill'
      });
    });
  }, []);

  const labelStyles = {
    display: 'block',
    fontWeight: 'bold',
    margin: '0 0 5px'
  };

  const handleLayerChange = (e) => {
    setLayer(e.target.value);
  };

  return (
    <div style={{ height: '100%', position: 'relative' }}>
      <div id="map" ref={mapContainerRef} style={{ height: '100%' }}></div>
      <div
        style={{
          font: `12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif`,
          position: 'absolute',
          width: 220,
          top: 0,
          left: 0,
          padding: '10px'
        }}
      >
        <div
          style={{
            backgroundColor: '#fff',
            boxShadow: '0 1px 2px rgba(0, 0, 0, 0.1)',
            borderRadius: '3px',
            padding: '10px',
            marginBottom: '10px'
          }}
        >
          <fieldset
            style={{
              border: 'none',
              padding: 0,
              margin: '0 0 10px'
            }}
          >
            <label style={labelStyles}>
              Select layer
              <select
                style={{ width: '100%' }}
                id="layer"
                name="layer"
                onChange={handleLayerChange}
              >
                <option value="water">Water</option>
                <option value="building">Buildings</option>
                <option value="triangles">Triangles</option>
              </select>
            </label>
          </fieldset>
          <fieldset>
            <label style={labelStyles}>
              Choose a color
              <div id="swatches">
                {colors.map((color, i) => (
                  <button
                    key={i}
                    style={{
                      backgroundColor: color,
                      display: 'inline-block',
                      width: '36px',
                      height: '20px',
                      border: 'none',
                      cursor: 'pointer'
                    }}
                    onClick={() => handleClick(color)}
                  ></button>
                ))}
              </div>
            </label>
          </fieldset>
        </div>
      </div>
    </div>
  );
};

export default MapboxExample;

このコードスニペットは、YOUR_MAPBOX_ACCESS_TOKENをあなたのMapboxアカウントのアクセストークンに置き換えるまで、期待通りに動作しません。

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