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

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

const DEFAULT_INTERVAL = 500;
export var SonarEventTypes;
(function (SonarEventTypes) {
    SonarEventTypes["CHANGE"] = "change";
    SonarEventTypes["LOST_CONTEXT"] = "lost-context";
})(SonarEventTypes || (SonarEventTypes = {}));
export class Sonar {
    constructor(detectionInterval = DEFAULT_INTERVAL) {
        this._poolDetectors = new Array();
        this._timerId = undefined;
        this._tickHandler = () => {
            for (let i = 0, l = this._poolDetectors.length; i < l; i++) {
                this._poolDetectors[i].detectChanges();
            }
        };
        this._interval = detectionInterval;
    }
    static create() {
        if (!Sonar.instance) {
            Sonar.instance = new Sonar();
        }
        return Sonar.instance;
    }
    run() {
        this._timerId = setInterval(this._tickHandler, this._interval);
    }
    stop() {
        if (this._timerId) {
            clearInterval(this._timerId);
            this._timerId = undefined;
        }
    }
    add(detector) {
        if (this._poolDetectors.indexOf(detector) > -1)
            return; // throw new Error('The detector is already added to pool');
        this._poolDetectors.push(detector);
    }
    remove(detector) {
        const index = this._poolDetectors.indexOf(detector);
        if (index === -1)
            return; // throw new Error('The detector is already removed');
        this._poolDetectors.splice(index, 1);
    }
    removeAll() {
        while (this._poolDetectors.length > 0) {
            const detector = this._poolDetectors.pop();
            if (detector) {
                detector.destroy();
            }
        }
    }
    destroy() {
        this.stop();
        this.removeAll();
        this._poolDetectors.length = 0;
    }
}
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