[OpenLayers-Dev] Flick effect in layers refresh

[Ernesto Mislej]

Hi all!
In my project I have to refresh a mapserver layer every 20/40 seconds.

I do this with:

refreshinterval = window.setInterval("refreshmap()", 20000);

function refreshmap(){
...
mslayer.redraw(true);
...
}

That is OK. But every refresh action, there is a flick effect.

When the refresh event is fired, OL turn off the old-layer and wait to
the images for new one. And the server calculation for the maplayer is
0.2 sec.

Any idea?
I do not know how to detect when the browser finished to render the
new images. (may be the download finished time is also useful).


Greets,
Ernesto


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