[OpenLayers-Users] spinner for WMS Untiled

[Erik Uzureau]

Hi Bart,

is there somewhere that we can see this live and running?

-Erik

On 1/9/07, Bart van den Eijnden (OSGIS) <bartvde at osgis.nl> wrote:
> Hi list,
>
> I have finally gotten things to work for having a spinner image for WMS
> Untiled. Note this only works for WMS Untiled, but I guess for loading tiles
> the user will have enough visual effect anyway of what's going on.
>
> I have added a patch to ticket 452 (http://trac.openlayers.org/ticket/452),
> hopefully somebody can review this. I have no problems signing the
> contributor agreement if necessary.
>
> If this will be accepted, I can add a section to the Wiki on how this event
> can be used within an application. I will do that in this e-mail as well to
> start with.
>
> The application should hold a counter variable:
>
> var layerloadcounter = 0;
>
> Three counter functions are necessary:
>
> function setcounterbynumlayers(){
>       var layers = map.layers.slice();
>       layerloadcounter = layers.length;
>       if (layerloadcounter > 0 && activitydiv) { activitydiv.style.zIndex =
> 1000; }
> }
> function increasecounter(){
>       layerloadcounter++;
>       if (layerloadcounter > 0 && activitydiv) { activitydiv.style.zIndex =
> 1000; }
> }
> function decreasecounter(){
>       if (layerloadcounter > 0) layerloadcounter--;
>       if (layerloadcounter == 0 && activitydiv) { activitydiv.style.zIndex =
> -1000; }
> }
>
> which are tied to OpenLayers events:
>
> map.events.register( 'addlayer', this, increasecounter);
> map.events.register( 'removelayer', this, decreasecounter);
> map.events.register( 'layerloaded', this, decreasecounter);
> map.events.register( 'moveend', this, setcounterbynumlayers);
>
> Finally, there needs to be a div showing the image:
>
> var gMapDHTMLWaitImage = 'yourimageurlgoeshere';
> sz = new OpenLayers.Size();
> sz.h = 246;
> sz.w = 50;
> activitydiv = OpenLayers.Util.createDiv("ActivityLayer", null, sz,
> gMapDHTMLWaitImage);
> map.viewPortDiv.appendChild(activitydiv);
>
> Best regards,
> Bart
>
> --
> Bart van den Eijnden
> OSGIS, Open Source GIS
> http://www.osgis.nl
>
>
>
>
>
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