Move layers up and down in the map.

  • terrain
  • toner
  • watercolor
100% Map style by Stamen Design, © OpenStreetMap contributors
index.js
import StadiaMaps from 'ol/source/StadiaMaps.js';

import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import Map from '@giro3d/giro3d/entities/Map.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import TiledImageSource from '@giro3d/giro3d/sources/TiledImageSource.js';

const crs = 'EPSG:3857';
const mapExtent = Extent.fromCenterAndSize(crs, { x: 256227, y: 5882214 }, 2000000, 2000000);
const viewerDiv = document.getElementById('viewerDiv');

// Creates a Giro3D instance
const instance = new Instance(viewerDiv, { crs });

// Instanciates camera
instance.camera.camera3D.position.set(256227, 5882214, 4000000);

const map = new Map('planar', { extent: mapExtent, backgroundOpacity: 0 });
instance.add(map);

const layerSize = 1000000;

const watercolor = new ColorLayer({
    name: 'watercolor',
    extent: Extent.fromCenterAndSize(crs, { x: -100000, y: 6169226 }, layerSize, layerSize),
    source: new TiledImageSource({
        source: new StadiaMaps({ layer: 'stamen_watercolor', wrapX: false }),
    }),
});

const toner = new ColorLayer({
    name: 'toner',
    extent: Extent.fromCenterAndSize(crs, { x: 500000, y: 5669226 }, layerSize, layerSize),
    source: new TiledImageSource({
        source: new StadiaMaps({ layer: 'stamen_toner', wrapX: false }),
    }),
});

const terrain = new ColorLayer({
    name: 'terrain',
    extent: Extent.fromCenterAndSize(crs, { x: 900000, y: 5169226 }, layerSize, layerSize),
    source: new TiledImageSource({
        source: new StadiaMaps({ layer: 'stamen_terrain', wrapX: false }),
    }),
});

map.addLayer(watercolor);
map.addLayer(toner);
map.addLayer(terrain);

Inspector.attach(document.getElementById('panelDiv'), instance);

const layers = {
    watercolor,
    toner,
    terrain,
};

function bindUI(layer) {
    const id = layer.name;
    const btnUp = document.getElementById(`btn-${id}-up`);
    const btnDown = document.getElementById(`btn-${id}-down`);
    const layerElt = document.getElementById(`${id}`);
    layerElt.layer = layer;
    const container = layerElt.parentNode;

    function reorder() {
        [...container.children]
            .sort((a, b) => (map.getIndex(layers[a.id]) > map.getIndex(layers[b.id]) ? -1 : 1))
            .forEach(node => container.appendChild(node));
    }

    btnUp.onclick = () => {
        map.moveLayerUp(layer);
        reorder();
    };
    btnDown.onclick = () => {
        map.moveLayerDown(layer);
        reorder();
    };

    reorder();
}

bindUI(watercolor);
bindUI(toner);
bindUI(terrain);
index.html
<!doctype html>
<html lang="en">
    <head>
        <title>Change layer order</title>
        <meta charset="UTF-8" />
        <meta name="name" content="layer_ordering" />
        <meta name="description" content="Move layers up and down in the map." />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />

        <link rel="icon" href="https://giro3d.org/images/favicon.svg" />
        <link href="https://giro3d.org/assets/bootstrap-custom.css" rel="stylesheet" />
        <script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
        <link
            rel="stylesheet"
            type="text/css"
            href="https://giro3d.org/next/css/example.css"
        />

        
    </head>

    <body>
        <div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
        <div id="panelDiv" class="position-absolute top-0 start-0 mh-100 overflow-auto"></div>

        <div class="side-pane-with-status-bar">
            <div class="card">
                <div class="card-body p-0">
                    <ul id="layer-list" class="list-group list-group-flush">
                        <li id="terrain" class="list-group-item">
                            <div class="float-start align-start mx-4">terrain</div>
                            <div
                                class="btn-group btn-group-sm float-end"
                                role="group"
                                aria-label="Basic example"
                            >
                                <button id="btn-terrain-up" type="button" class="btn btn-primary">
                                    Up
                                </button>
                                <button id="btn-terrain-down" type="button" class="btn btn-primary">
                                    Down
                                </button>
                            </div>
                        </li>

                        <li id="toner" class="list-group-item">
                            <div class="float-start align-start mx-4">toner</div>
                            <div
                                class="btn-group btn-group-sm float-end"
                                role="group"
                                aria-label="Basic example"
                            >
                                <button id="btn-toner-up" type="button" class="btn btn-primary">Up</button>
                                <button id="btn-toner-down" type="button" class="btn btn-primary">
                                    Down
                                </button>
                            </div>
                        </li>

                        <li id="watercolor" class="list-group-item">
                            <div class="float-start align-start mx-4">watercolor</div>
                            <div
                                class="btn-group btn-group-sm float-end"
                                role="group"
                                aria-label="Basic example"
                            >
                                <button id="btn-watercolor-up" type="button" class="btn btn-primary">
                                    Up
                                </button>
                                <button id="btn-watercolor-down" type="button" class="btn btn-primary">
                                    Down
                                </button>
                            </div>
                        </li>
                    </ul>
                </div>
            </div>
        </div>

        <script type="module" src="index.js"></script>
        <script>
            /* activate popovers */
            const popoverTriggerList = [].slice.call(
                document.querySelectorAll('[data-bs-toggle="popover"]'),
            );
            popoverTriggerList.map(
                // bootstrap is used as script in the template, disable warning about undef
                // eslint-disable-next-line no-undef
                popoverTriggerEl =>
                    new bootstrap.Popover(popoverTriggerEl, {
                        trigger: 'hover',
                        placement: 'left',
                        content: document.getElementById(
                            popoverTriggerEl.getAttribute('data-bs-content'),
                        ).innerHTML,
                        html: true,
                    }),
            );
        </script>
    </body>
</html>
package.json
{
    "name": "layer_ordering",
    "dependencies": {
        "@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}