Files
openlayers/examples/layer-swipe.js
Tim Schaub ad62739a6e Use blocked scoped variables
In addition to using const and let, this also upgrades our linter config and removes lint (mostly whitespace).
2018-01-12 00:50:30 -07:00

52 lines
1.2 KiB
JavaScript

import Map from '../src/ol/Map.js';
import View from '../src/ol/View.js';
import {defaults as defaultControls} from '../src/ol/control.js';
import TileLayer from '../src/ol/layer/Tile.js';
import BingMaps from '../src/ol/source/BingMaps.js';
import OSM from '../src/ol/source/OSM.js';
const osm = new TileLayer({
source: new OSM()
});
const bing = new TileLayer({
source: new BingMaps({
key: 'As1HiMj1PvLPlqc_gtM7AqZfBL8ZL3VrjaS3zIb22Uvb9WKhuJObROC-qUpa81U5',
imagerySet: 'Aerial'
})
});
const map = new Map({
layers: [osm, bing],
target: 'map',
controls: defaultControls({
attributionOptions: {
collapsible: false
}
}),
view: new View({
center: [0, 0],
zoom: 2
})
});
const swipe = document.getElementById('swipe');
bing.on('precompose', function(event) {
const ctx = event.context;
const width = ctx.canvas.width * (swipe.value / 100);
ctx.save();
ctx.beginPath();
ctx.rect(width, 0, ctx.canvas.width - width, ctx.canvas.height);
ctx.clip();
});
bing.on('postcompose', function(event) {
const ctx = event.context;
ctx.restore();
});
swipe.addEventListener('input', function() {
map.render();
}, false);