convex-pixel/esm2015/cpx/utils/sonar/sonar-debounce.js

The library for creating pseudo 3d interactive scenes based on webgl

import * as PIXI from "pixi.js";
import { SonarEventTypes } from "./sonar";
const DEFAULT_TIMEOUT = 500;
export class SonarDebounce extends PIXI.utils.EventEmitter {
    constructor(timeout = DEFAULT_TIMEOUT, eventType = SonarEventTypes.CHANGE) {
        super();
        this._detectChangesHandler = (nextStep = false) => {
            this.detectChanges(nextStep);
        };
        this._timeout = timeout;
        this._eventType = eventType;
    }
    get eventType() {
        return this._eventType;
    }
    detectChanges(nextStep = false) {
        if (nextStep) {
            this._detectChangesNextFrame();
            return;
        }
        if (!this._eventType) {
            throw Error("Property \"eventType\" is not defined.");
        }
        this.emit(this._eventType);
    }
    detect() {
        clearTimeout(this._timeoutId);
        this._timeoutId = setTimeout(this._detectChangesHandler, this._timeout);
    }
    stop() {
        clearTimeout(this._timeoutId);
        clearTimeout(this._nextTimeoutId);
    }
    destroy() {
        this.stop();
        this.removeAllListeners();
    }
    _detectChangesNextFrame() {
        clearTimeout(this._nextTimeoutId);
        this._nextTimeoutId = setTimeout(this._detectChangesHandler, 0);
    }
}
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