Qt Webkit Browser: On Intel Atom Z-CPU-Family with XP a css3 marquee provokes that the systemtime is running very fast!

armandopoulos · wrote on 8 Apr 2011, 14:25

Hello All and thank you in advance for reading my question.

I can´t believe my observations with the standart Qt Webkit Browser on an Intel Atom 1,1Ghz and 1,6Ghz from the Z-Family line.

a marquee propriety " -webkit-marquee-speed: fast;" does that the showing seconds from the javascript clock and the windows xp systembasistime are running very quickly.

It seems a bug from QT-Webkit-Lib.

If i open the same webpage with safari on the same machine, the clocks (systemtime and cloch on the webpage) are working very fine.

I would be a real pleasure if somebody can test this code and late me know, if i dream. The Atom Z CPU Family is very important for do this. On a Netbook with an Atom CPU N270.It´s working very good.

Please take a look at this example.

You need this both files to reproduce this effect.

index.html

@
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Z-CPU-Family-PC with windows XP and standard QT-Webkit Browser the system time is working very fast!! </title>
<link rel="stylesheet" type="text/css" href="test.css" media="screen, projection"/>
<style type="text/css"></style>

[removed]
<!--
function init ( )
{
timeDisplay = document.createTextNode ( "" );
document.getElementById("clock").appendChild ( timeDisplay );
}
function updateClock ( )
{
var currentTime = new Date ( );

var currentHours = currentTime.getHours ( );
var currentMinutes = currentTime.getMinutes ( );
var currentSeconds = currentTime.getSeconds ( );

// Pad the minutes and seconds with leading zeros, if required
currentMinutes = ( currentMinutes < 10 ? "0" : "" ) + currentMinutes;
currentSeconds = ( currentSeconds < 10 ? "0" : "" ) + currentSeconds;

// Choose either "AM" or "PM" as appropriate
var timeOfDay = ( currentHours < 12 ) ? "AM" : "PM";

// Convert the hours component to 12-hour format if needed
currentHours = ( currentHours > 12 ) ? currentHours - 12 : currentHours;

// Convert an hours component of "0" to "12"
currentHours = ( currentHours == 0 ) ? 12 : currentHours;

// Compose the string for display
var currentTimeString = currentHours + ":" + currentMinutes + ":" + currentSeconds + " " + timeOfDay;

// Update the time display
document.getElementById("clock").firstChild.nodeValue = currentTimeString;
}
// -->
[removed]

</head>
<body>

</div>

<div id="Marquee" class="marquee span-1 h last row-3">"This is just a marquee test.On an Atom Z-CPU-Family-PC with windows XP and standard QT-Webkit Browser the system time is working very fast !!!! Do you know why? It seems a bug from QT-Webkit-Lib</div>

</body>
</html>

@

test.css

@
/* The header area in the top of the screen */
div.header {
background-color: #00f;;
color: white;
font-family: "Arial", "Helvetica", "Verdana", "sans-serif";
width: 1024px;
height: 768px;
padding: 0px;
margin: 0px;
}

/* The marquee test */
div.marquee {
font-family: "Arial", "Helvetica", "Verdana", "sans-serif";
color: #FAFCFE;
background-color: rgb(0,0,255);
position: relative;
top: -640px;
white-space: nowrap; overflow: hidden;
overflow-x:-webkit-marquee;
-webkit-marquee-direction: backwards;
-webkit-marquee-style: scroll;
-webkit-marquee-speed: fast;
-webkit-marquee-increment: 2px;
-webkit-marquee-repetition: infinite;
opacity: 1;
}

div.h {
font-size: 28pt;

@

tobias.hunger · wrote on 8 Apr 2011, 15:06

Please "file a bug report":http://bugreports.qt.nokia.com/ if you think you found a bug.