[OpenLayers-Users] Way to detect if layer is done loading?

[William Bronsema]

Hi Brad,

I haven't done this with OpenLayers yet, but typically in applications
(especially AJAX apps) I maintain a queue of loading images requests.  When
a process starts (such as a layer load, I add it to the queue) when the
process is finished then it gets popped off the queue.  Only when the queue
is empty do you killing the loading image.

HTH

Cheers,
Bill

-----Original Message-----
From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] On
Behalf Of bradleyspencer
Sent: Tuesday, October 16, 2007 7:27 PM
To: Christopher Schmidt; Edward Fialkowski; users at openlayers.org
Subject: Re: [OpenLayers-Users] Way to detect if layer is done loading?

I am trying to implement a Loading Image as well. I have managed to use
LayerLoadMonitoring example to build my own Loading thingy.

See http://demo.cubewerx.com.au/layerload.html

This works fine for single layers as activate the Loading Image as start of
load and I kill it off once that layer has loaded.

However, if there are multiple layers active and there is a time difference
between loading layers, the loading image has gone after the first layer has
completed loading.

I'm not sure how I can modify this to kill off the Loading Image only after
all layers are loaded.

Can anyone help me here?

Cheers,


Brad Spencer
http://www.cubewerx.com.au

-----Original Message-----
From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org]On
Behalf Of Christopher Schmidt
Sent: Tuesday, 16 October 2007 7:15 AM
To: Edward Fialkowski
Cc: users at openlayers.org
Subject: Re: [OpenLayers-Users] Way to detect if layer is done loading?

On Mon, Oct 15, 2007 at 03:16:14PM -0500, Edward Fialkowski wrote:
> Hi List, I would really like to add a loading image to my app to show when
a
> layer is still being downloaded, but I'm having difficulty getting the
right
> javascript code.
>
> One option is if it's possible to know in openlayers when a WMS image is
> finished downloading and added to the map.
>
> Has anyone ever tried anything like this?

http://openlayers.org/dev/examples/layerLoadMonitoring.html

Regards,
--
Christopher Schmidt
MetaCarta
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