94 lines
2.0 KiB
JavaScript
94 lines
2.0 KiB
JavaScript
import Map from '../src/ol/Map.js';
|
|
import TileLayer from '../src/ol/layer/Tile.js';
|
|
import View from '../src/ol/View.js';
|
|
import XYZ from '../src/ol/source/XYZ.js';
|
|
|
|
/**
|
|
* Renders a progress bar.
|
|
* @param {HTMLElement} el The target element.
|
|
* @class
|
|
*/
|
|
function Progress(el) {
|
|
this.el = el;
|
|
this.loading = 0;
|
|
this.loaded = 0;
|
|
}
|
|
|
|
/**
|
|
* Increment the count of loading tiles.
|
|
*/
|
|
Progress.prototype.addLoading = function () {
|
|
++this.loading;
|
|
this.update();
|
|
};
|
|
|
|
/**
|
|
* Increment the count of loaded tiles.
|
|
*/
|
|
Progress.prototype.addLoaded = function () {
|
|
++this.loaded;
|
|
this.update();
|
|
};
|
|
|
|
/**
|
|
* Update the progress bar.
|
|
*/
|
|
Progress.prototype.update = function () {
|
|
const width = ((this.loaded / this.loading) * 100).toFixed(1) + '%';
|
|
this.el.style.width = width;
|
|
};
|
|
|
|
/**
|
|
* Show the progress bar.
|
|
*/
|
|
Progress.prototype.show = function () {
|
|
this.el.style.visibility = 'visible';
|
|
};
|
|
|
|
/**
|
|
* Hide the progress bar.
|
|
*/
|
|
Progress.prototype.hide = function () {
|
|
const style = this.el.style;
|
|
setTimeout(function () {
|
|
style.visibility = 'hidden';
|
|
style.width = 0;
|
|
}, 250);
|
|
};
|
|
|
|
const progress = new Progress(document.getElementById('progress'));
|
|
|
|
const key = 'get_your_own_D6rA4zTHduk6KOKTXzGB';
|
|
const attributions =
|
|
'<a href="https://www.maptiler.com/copyright/" target="_blank">© MapTiler</a> ' +
|
|
'<a href="https://www.openstreetmap.org/copyright" target="_blank">© OpenStreetMap contributors</a>';
|
|
|
|
const source = new XYZ({
|
|
attributions: attributions,
|
|
url: 'https://api.maptiler.com/maps/streets/{z}/{x}/{y}.png?key=' + key,
|
|
tileSize: 512,
|
|
});
|
|
|
|
source.on('tileloadstart', function () {
|
|
progress.addLoading();
|
|
});
|
|
source.on(['tileloadend', 'tileloaderror'], function () {
|
|
progress.addLoaded();
|
|
});
|
|
|
|
const map = new Map({
|
|
layers: [new TileLayer({source: source})],
|
|
target: 'map',
|
|
view: new View({
|
|
center: [0, 0],
|
|
zoom: 2,
|
|
}),
|
|
});
|
|
|
|
map.on('loadstart', function () {
|
|
progress.show();
|
|
});
|
|
map.on('loadend', function () {
|
|
progress.hide();
|
|
});
|