ev-olcs
Version:
OpenLayers Cesium integration and plugin library
100 lines • 7.22 kB
JavaScript
import SynchronizedOverlay from './SynchronizedOverlay.js';
import { getUid } from './util.js';
import { unByKey as olObservableUnByKey } from 'ol/Observable.js';
export default class OverlaySynchronizer {
map;
scene;
overlayCollection_;
overlayContainerStopEvent_;
overlayContainer_;
overlayMap_ = new Map();
overlayEvents = ['click', 'dblclick', 'mousedown', 'touchstart', 'pointerdown', 'mousewheel', 'wheel'];
listenerKeys_ = [];
/**
* @param map
* @param scene
* @constructor
* @api
*/
constructor(map, scene) {
this.map = map;
this.scene = scene;
this.map = map;
this.overlayCollection_ = this.map.getOverlays();
this.scene = scene;
this.overlayContainerStopEvent_ = document.createElement('div');
this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';
this.overlayEvents.forEach((name) => {
this.overlayContainerStopEvent_.addEventListener(name, evt => evt.stopPropagation());
});
this.scene.canvas.parentElement.appendChild(this.overlayContainerStopEvent_);
this.overlayContainer_ = document.createElement('div');
this.overlayContainer_.className = 'ol-overlaycontainer';
this.scene.canvas.parentElement.appendChild(this.overlayContainer_);
}
/**
* Get the element that serves as a container for overlays that don't allow
* event propagation. Elements added to this container won't let mousedown and
* touchstart events through to the map, so clicks and gestures on an overlay
* don't trigger any {@link ol.MapBrowserEvent}.
* @return The map's overlay container that stops events.
*/
getOverlayContainerStopEvent() {
return this.overlayContainerStopEvent_;
}
/**
* Get the element that serves as a container for overlays.
* @return The map's overlay container.
*/
getOverlayContainer() {
return this.overlayContainer_;
}
/**
* Destroy all and perform complete synchronization of the overlays.
* @api
*/
synchronize() {
this.destroyAll();
this.overlayCollection_.forEach((overlay) => { this.addOverlay(overlay); });
this.listenerKeys_.push(this.overlayCollection_.on('add', (evt) => this.addOverlay(evt.element)));
this.listenerKeys_.push(this.overlayCollection_.on('remove', (evt) => this.removeOverlay(evt.element)));
}
/**
* @api
*/
addOverlay(overlay) {
if (!overlay) {
return;
}
const cesiumOverlay = new SynchronizedOverlay({
scene: this.scene,
synchronizer: this,
parent: overlay
});
this.overlayMap_.set(getUid(overlay), cesiumOverlay);
}
/**
* Removes an overlay from the scene
* @api
*/
removeOverlay(overlay) {
const overlayId = getUid(overlay);
const csOverlay = this.overlayMap_.get(overlayId);
if (csOverlay) {
csOverlay.destroy();
this.overlayMap_.delete(overlayId);
}
}
/**
* Destroys all the created Cesium objects.
*/
destroyAll() {
this.overlayMap_.forEach((overlay) => {
overlay.destroy();
});
this.overlayMap_.clear();
olObservableUnByKey(this.listenerKeys_);
this.listenerKeys_.length = 0;
}
}
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