angular-cesium
Version:
Angular library for working with Cesium.
35 lines • 6.11 kB
JavaScript
import { of as observableOf } from 'rxjs';
import { delay, mergeMap, publish, takeUntil } from 'rxjs/operators';
import { CesiumPureEventObserver } from './cesium-pure-event-observer';
import { CesiumEvent } from '../consts/cesium-event.enum';
export class CesiumLongPressObserver extends CesiumPureEventObserver {
constructor(event, modifier, eventFactory) {
super(event, modifier);
this.event = event;
this.modifier = modifier;
this.eventFactory = eventFactory;
}
init() {
let startEvent;
let stopEvent;
if (this.event === CesiumEvent.LONG_LEFT_PRESS) {
startEvent = CesiumEvent.LEFT_DOWN;
stopEvent = CesiumEvent.LEFT_UP;
}
else if (this.event === CesiumEvent.LONG_RIGHT_PRESS) {
startEvent = CesiumEvent.RIGHT_DOWN;
stopEvent = CesiumEvent.RIGHT_UP;
}
else if (this.event === CesiumEvent.LONG_MIDDLE_PRESS) {
startEvent = CesiumEvent.MIDDLE_DOWN;
stopEvent = CesiumEvent.MIDDLE_UP;
}
const startEventObservable = this.eventFactory.get(startEvent, this.modifier);
const stopEventObservable = this.eventFactory.get(stopEvent, this.modifier);
// publish for preventing side effect
const longPressObservable = publish()(startEventObservable.pipe(mergeMap((e) => observableOf(e).pipe(delay(CesiumLongPressObserver.LONG_PRESS_EVENTS_DURATION), takeUntil(stopEventObservable)))));
return longPressObservable;
}
}
CesiumLongPressObserver.LONG_PRESS_EVENTS_DURATION = 250;
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