73 lines
1.5 KiB
JavaScript
73 lines
1.5 KiB
JavaScript
import GeoJSON from '../src/ol/format/GeoJSON.js';
|
|
import VectorLayer from '../src/ol/layer/Vector.js';
|
|
import VectorSource from '../src/ol/source/Vector.js';
|
|
import {Draw, Modify, Select, Snap} from '../src/ol/interaction.js';
|
|
import {Map, View} from '../src/ol/index.js';
|
|
import {useGeographic} from '../src/ol/proj.js';
|
|
|
|
useGeographic();
|
|
|
|
const source = new VectorSource({
|
|
url: 'https://openlayers.org/data/vector/us-states.json',
|
|
format: new GeoJSON(),
|
|
});
|
|
|
|
const map = new Map({
|
|
target: 'map',
|
|
layers: [
|
|
new VectorLayer({
|
|
background: 'white',
|
|
source: source,
|
|
}),
|
|
],
|
|
view: new View({
|
|
center: [-100, 38.5],
|
|
zoom: 4,
|
|
}),
|
|
});
|
|
|
|
const select = new Select();
|
|
|
|
const modify = new Modify({
|
|
features: select.getFeatures(),
|
|
});
|
|
|
|
const draw = new Draw({
|
|
type: 'Polygon',
|
|
source: source,
|
|
});
|
|
|
|
const snap = new Snap({
|
|
source: source,
|
|
});
|
|
|
|
function removeInteractions() {
|
|
map.removeInteraction(modify);
|
|
map.removeInteraction(select);
|
|
map.removeInteraction(draw);
|
|
map.removeInteraction(select);
|
|
}
|
|
|
|
const mode = document.getElementById('mode');
|
|
function onChange() {
|
|
removeInteractions();
|
|
switch (mode.value) {
|
|
case 'draw': {
|
|
map.addInteraction(draw);
|
|
map.addInteraction(snap);
|
|
break;
|
|
}
|
|
case 'modify': {
|
|
map.addInteraction(select);
|
|
map.addInteraction(modify);
|
|
map.addInteraction(snap);
|
|
break;
|
|
}
|
|
default: {
|
|
// pass
|
|
}
|
|
}
|
|
}
|
|
mode.addEventListener('change', onChange);
|
|
onChange();
|