autograph/src/components/models/ClockComponent.js

A visual data routing automation tool.

/**
 * Component to fire a bang at regular, settable interval.
 *
 * @class
 * @type {*}
 */
var ClockComponent = BaseComponent.extend({

    label: "clock",

    inputs: {
        toggle: {
            name: "toggle",
            description: "Turn the clock off or on."
        },
        period: {
            name: "period",
            description: "Period of the clock in milliseconds."
        }
    },
    outputs: {
        output: {name: "output"}
    },

    defaults: {
        period: 1000,
        running: true
    },

    initialize: function () {
        BaseComponent.prototype.initialize.call(this);

        // reset clock when period changes
        this.on("change:period", function () {
            clearTimeout(this.timeoutId);
            this.tick();
        });

        this.tick();
    },

    receiveBang: function () {
        if (this.get("running")) {
            this.set("running", false);
        }
        else {
            this.set("running", true);
            this.tick();
        }
    },


    tick: function () {
        var self = this;
        this.timeoutId = setTimeout(function () {
            if (self.get("running")) {
                self.sendBang();
                self.tick();
            }
        }, this.get("period"));
    }

});