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var url = 'http://demos.mootools.net/demos/Ajax_Timed/ajax_timed.php';
// refresh every 4 seconds
var timer = 4;
// periodical and dummy variables for later use
var periodical, dummy;
var start = $('start'), stop = $('stop'), log = $('log_res');
/* our ajax istance */
var ajax = new Ajax(url, {
update: log,
method: 'get',
onComplete: function() {
// when complete, we remove the spinner
log.removeClass('ajax-loading');
},
onCancel: function() {
// when we stop timed ajax while it's requesting
// we forse to cancel the request, so here we
// just remove the spinner
log.removeClass('ajax-loading');
}
});
/* our refresh function: it sets a dummy to prevent
caching of php and add the loader class */
var refresh = (function() {
// dummy to prevent caching of php
dummy = $time() + $random(0, 100);
// we add out fancy spinner
log.empty().addClass('ajax-loading');
// requests of our php plus dummy as query
ajax.request(dummy);
});
stop.addEvent('click', function(e) {
new Event(e).stop(); // prevent default;
/* a bit of fancy styles
note: we do not remove 'ajax-loading' class
because it is already done by 'onCancel'
since we later do 'ajax.cancel()'
*/
start.setStyle('font-weight', 'normal');
stop.setStyle('font-weight', 'bold');
/* ********************* */
// let's stop our timed ajax
$clear(periodical);
// and let's stop our request in case it was waiting for a response
ajax.cancel();
});
// start and stop click events
document.body.addEvent('load', function(e) {
// prevent default
new Event(e).stop();
// prevent insane clicks to start numerous requests
$clear(periodical);
/* a bit of fancy styles */
stop.setStyle('font-weight', 'normal');
start.setStyle('font-weight', 'bold');
log.empty().addClass('ajax-loading');
/* ********************* */
// the periodical starts here, the * 1000 is because milliseconds required
periodical = refresh.periodical(timer * 1000, this);
// this is the first only request, later on will be only the periodical and refresh
// that do the request. If we don't do this way, we have to wait for 4 seconds before
// the first request.
ajax.request($time());
}); |
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