Files
openlayers/examples/earthquake-custom-symbol.js
Tim Schaub 054af09032 Make code prettier
This updates ESLint and our shared eslint-config-openlayers to use Prettier.  Most formatting changes were automatically applied with this:

    npm run lint -- --fix

A few manual changes were required:

 * In `examples/offscreen-canvas.js`, the `//eslint-disable-line` comment needed to be moved to the appropriate line to disable the error about the `'worker-loader!./offscreen-canvas.worker.js'` import.
 * In `examples/webpack/exapmle-builder.js`, spaces could not be added after a couple `function`s for some reason.  While editing this, I reworked `ExampleBuilder` to be a class.
 * In `src/ol/format/WMSGetFeatureInfo.js`, the `// @ts-ignore` comment needed to be moved down one line so it applied to the `parsersNS` argument.
2020-04-06 12:54:09 -06:00

84 lines
2.1 KiB
JavaScript

import KML from '../src/ol/format/KML.js';
import Map from '../src/ol/Map.js';
import Polygon from '../src/ol/geom/Polygon.js';
import Stamen from '../src/ol/source/Stamen.js';
import VectorSource from '../src/ol/source/Vector.js';
import View from '../src/ol/View.js';
import {Fill, Icon, Stroke, Style} from '../src/ol/style.js';
import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
import {toContext} from '../src/ol/render.js';
const symbol = [
[0, 0],
[4, 2],
[6, 0],
[10, 5],
[6, 3],
[4, 5],
[0, 0],
];
let scale;
const scaleFunction = function (coordinate) {
return [coordinate[0] * scale, coordinate[1] * scale];
};
const styleCache = {};
const styleFunction = function (feature) {
// 2012_Earthquakes_Mag5.kml stores the magnitude of each earthquake in a
// standards-violating <magnitude> tag in each Placemark. We extract it from
// the Placemark's name instead.
const name = feature.get('name');
const magnitude = parseFloat(name.substr(2));
const size = parseInt(10 + 40 * (magnitude - 5), 10);
scale = size / 10;
let style = styleCache[size];
if (!style) {
const canvas = document.createElement('canvas');
const vectorContext = toContext(canvas.getContext('2d'), {
size: [size, size],
pixelRatio: 1,
});
vectorContext.setStyle(
new Style({
fill: new Fill({color: 'rgba(255, 153, 0, 0.4)'}),
stroke: new Stroke({color: 'rgba(255, 204, 0, 0.2)', width: 2}),
})
);
vectorContext.drawGeometry(new Polygon([symbol.map(scaleFunction)]));
style = new Style({
image: new Icon({
img: canvas,
imgSize: [size, size],
rotation: 1.2,
}),
});
styleCache[size] = style;
}
return style;
};
const vector = new VectorLayer({
source: new VectorSource({
url: 'data/kml/2012_Earthquakes_Mag5.kml',
format: new KML({
extractStyles: false,
}),
}),
style: styleFunction,
});
const raster = new TileLayer({
source: new Stamen({
layer: 'toner',
}),
});
const map = new Map({
layers: [raster, vector],
target: 'map',
view: new View({
center: [0, 0],
zoom: 2,
}),
});