Files
openlayers/examples/icon-negative.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

73 lines
2.1 KiB
JavaScript

import Feature from '../src/ol/Feature.js';
import Map from '../src/ol/Map.js';
import Point from '../src/ol/geom/Point.js';
import Select from '../src/ol/interaction/Select.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 {Icon, Style} from '../src/ol/style.js';
import {Tile as TileLayer, Vector as VectorLayer} from '../src/ol/layer.js';
function createStyle(src, img) {
return new Style({
image: new Icon({
anchor: [0.5, 0.96],
crossOrigin: 'anonymous',
src: src,
img: img,
imgSize: img ? [img.width, img.height] : undefined,
}),
});
}
const iconFeature = new Feature(new Point([0, 0]));
iconFeature.set('style', createStyle('data/icon.png', undefined));
const map = new Map({
layers: [
new TileLayer({
source: new Stamen({layer: 'watercolor'}),
}),
new VectorLayer({
style: function (feature) {
return feature.get('style');
},
source: new VectorSource({features: [iconFeature]}),
}),
],
target: document.getElementById('map'),
view: new View({
center: [0, 0],
zoom: 3,
}),
});
const selectStyle = {};
const select = new Select({
style: function (feature) {
const image = feature.get('style').getImage().getImage();
if (!selectStyle[image.src]) {
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = image.width;
canvas.height = image.height;
context.drawImage(image, 0, 0, image.width, image.height);
const imageData = context.getImageData(0, 0, canvas.width, canvas.height);
const data = imageData.data;
for (let i = 0, ii = data.length; i < ii; i = i + (i % 4 == 2 ? 2 : 1)) {
data[i] = 255 - data[i];
}
context.putImageData(imageData, 0, 0);
selectStyle[image.src] = createStyle(undefined, canvas);
}
return selectStyle[image.src];
},
});
map.addInteraction(select);
map.on('pointermove', function (evt) {
map.getTargetElement().style.cursor = map.hasFeatureAtPixel(evt.pixel)
? 'pointer'
: '';
});