Timer Class

Overview

The Timer class represents a timer for firing events at a specified interval.

Constructor

Timer()

Events

Timer.tick

Fired each time a timer interval has passed.

Methods

Timer.getInterval

Gets the timer event interval.

Timer.isRunning

Returns true if the timer is running and false otherwise.

Timer.setInterval

Set the timer event interval.

Timer.start

Starts the timer

Timer.stop

Stops the timer

Example

// define our timer class
class MyTimer {
    // total amount of time that has elapsed since the timer started
    time_total = 0;

    // the interval in milliseconds at which the timer event fires
    time_interval = 100;

    timer = null;

    constructor() {
        // create a new timer object, set it to fire the tick event at
        // the specified interval, and connect the tick event to the
        // onTick method
        this.timer = new Timer();
        this.timer.setInterval(this.time_interval);
        this.timer.tick.connect(this, this.onTick);

        // start the timer
        this.timer.start();
    }

    onTick() {
        // onTick will be called every time the specified interval has
        // elapsed, which in this case is 100 milliseconds

        // track the total time since the event started firing
        this.time_total += this.time_interval;

        // if 1 second has elapsed, stop the timer
        // and issue an alert
        if (this.time_total >= 1000) {
            this.timer.stop();
            alert("1 second has elapsed");
        }
    }
}


// create a new instance of our timer class
// and start the application event loop
const t = new MyTimer();
Application.run();