how do I pause and resume a timer?

Question

I got this function that starts a timer on this format 00:00:00 whenever I click on a button. But I don\'t know how to do functions resume and pause. I\'ve found some snippe

Answer 1

Just clearing the interval wouldn't work, because totalSeconds would not get incremented. I would set up a flag that determines if the clock is paused or not.

This flag would be simply set upon calling pause() or unset upon resume(). I separated the totalSeconds increase to a 'tick' timeout that will always be running, even when paused (so that we can keep track of the time when we resume).

The tick function will therefore only update the time if the clock is not paused.

function clock()
{
    var pauseObj = new Object();

    var totalSeconds = 0;
    var isPaused = false;
    var delay = setInterval(tick, 1000);

    function pause()
    {
        isPaused = true;
    }

    function resume()
    {
        isPaused = false;
    }

    function setTime()
    {
        var ctr;
        $(".icon-play").each(function(){
            if( $(this).parent().hasClass('hide') )
                ctr = ($(this).attr('id')).split('_');
        });

        $("#hour_" + ctr[1]).text(pad(Math.floor(totalSeconds/3600)));
        $("#min_" + ctr[1]).text(pad( Math.floor((totalSeconds/60)%60)));
        $("#sec_" + ctr[1]).text(pad(parseInt(totalSeconds%60)));
    }

    function tick()
    {
        ++totalSeconds;

        if (!isPaused)
           setTime();
    }
}