asked on

some progress indicator during http request

Hi,

Does anyone have some sample code for showing a little progress bar when an ajax operation is happening? I have something like:

function StartRequest()
{
alert("start ajax call");
httpRequestObject.sendRequest(..);
}

function HandleResponse()
{
alert("ajax call done");
}

Is there anyway to measure progress of the call to give some visual representation of it? Should I just set an image to say 'loading' in StartRequest(), then hide it whenever HandleResponse() executes?

Any ideas would be great,

Thanks

nito8300

place this within the body tag

<div align="left">
<table>
<tr>
<td>
<div style="BORDER-RIGHT: black 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: black 1px solid; PADDING-LEFT: 2px; FONT-SIZE: 8pt; PADDING-BOTTOM: 2px; BORDER-LEFT: black 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: black 1px solid">
<span id="progress1">   </span> <span id="progress2">  </span> <span id="progress3"> 
 </span> <span id="progress4">   </span> <span id="progress5"> 
 </span> <span id="progress6">   </span> <span id="progress7"> 
 </span> <span id="progress8">   </span> <span id="progress9"> 
 </span>
</div>
</td>
</tr>

</table>
</div>

<script language="javascript">
var progressEnd = 9;
var progressColor = '3A76BC';
var progressInterval = 50;

var progressAt = progressEnd;
var progressTimer;
function progress_clear() {
      for (var i = 1; i <= progressEnd; i++) document.getElementById('progress'+i).style.backgroundColor = 'transparent';
      progressAt = 0;
}
function progress_update() {
      progressAt++;
      if (progressAt > progressEnd) progress_clear();
      else document.getElementById('progress'+progressAt).style.backgroundColor = progressColor;
      progressTimer = setTimeout('progress_update()',progressInterval);
}
function progress_stop() {
      clearTimeout(progressTimer);
      progress_clear();
}
progress_update();
</script>

nabsol

Hi

Hope this helps
http://www.dynamicdrive.com/dynamicindex11/xpprogressbar.htm

Nab

raj3060

Some modification to @nito8300's solution..

+++++++++++++++++++++++++
<div align="center">
<table>
<tr>
<td>
<div style="BORDER: black 1px solid; PADDING: 1px;width:205;height:15;">
<span id="progress" style="height:15;width:10;"></span>
</div>
</td>
</tr>

</table>
</div>

<script language="javascript">
var progressEnd = 100;
var progressColor = '#DD0000';
var progressInterval = 20;
var spanWidth = 0;
var progressAt = 0;
var progressTimer;
function progress_clear() {
             document.getElementById('progress').style.backgroundColor = 'transparent';
             spanWidth = 0;
progressAt = 0;
}
function progress_update() {
             progressAt++;
if (progressAt > progressEnd)
                         progress_clear();
else
             document.getElementById('progress').style.width = spanWidth;
             document.getElementById('progress').style.backgroundColor = progressColor;
progressTimer = setTimeout('progress_update()',progressInterval);
             spanWidth += 2
}
function progress_stop() {
clearTimeout(progressTimer);
progress_clear();
}
progress_update();
</script>
+++++++++++++++++++++++++

-raj-

ASKER CERTIFIED SOLUTION

kernelv12

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minnirok

ASKER

I have to agree with kernelv12 on this - I've decided to just show an animated gif to indicate something is happening, so please wait, etc.

Thanks