// Simple example of using private variables
//
// To start the stopwatch:
// obj.start();
//
// To get the duration in milliseconds without pausing / resuming:
// var x = obj.time();
//
// To pause the stopwatch:
// var x = obj.stop(); // Result is duration in milliseconds
//
// To resume a paused stopwatch
// var x = obj.start(); // Result is duration in milliseconds
//
// To reset a paused stopwatch
// obj.stop();
//
var clsStopwatch = function() {
// Private vars
var startAt = 0; // Time of last start / resume. (0 if not running)
var lapTime = 0; // Time on the clock when last stopped in milliseconds
var now = function() {
return (new Date()).getTime();
};
// Public methods
// Start or resume
this.start = function() {
startAt = startAt ? startAt : now();
};
// Stop or pause
this.stop = function() {
// If running, update elapsed time otherwise keep it
lapTime = startAt ? lapTime + now() - startAt : lapTime;
startAt = 0; // Paused
};
// Reset
this.reset = function() {
lapTime = startAt = 0;
};
// Duration
this.time = function() {
return lapTime + (startAt ? now() - startAt : 0);
};
};
var x = new clsStopwatch();
var $time;
var clocktimer;
function pad(num, size) {
var s = "0000" + num;
return s.substr(s.length - size);
}
function formatTime(time) {
var h = m = s = ms = 0;
var newTime = '';
h = Math.floor( time / (60 * 60 * 1000) );
time = time % (60 * 60 * 1000);
m = Math.floor( time / (60 * 1000) );
time = time % (60 * 1000);
s = Math.floor( time / 1000 );
ms = time % 1000;
newTime = pad(h, 2) + ':' + pad(m, 2) + ':' + pad(s, 2) + ':' + pad(ms, 3);
return newTime;
}
function show() {
$time = document.getElementById('time');
update();
}
function update() {
$time.innerHTML = formatTime(x.time());
}
function start() {
clocktimer = setInterval("update()", 1);
x.start();
}
function stop() {
x.stop();
clearInterval(clocktimer);
}
function reset() {
stop();
x.reset();
update();
}
