[OpenLayers-Users] Capture Tile information

[Andreas Hocevar]

No, this is not possible. But the tileloaded event will also fire when
the image comes from the cache.

Andreas.

On Thu, Feb 16, 2012 at 2:56 PM, francescoboccacci at libero.it
<francescoboccacci at libero.it> wrote:
> Good solution.. the last question is:
> i can capture if an error is occurs during the tile loading (olImageLoadError)
> , but is possible to check if the tile is already present in my cache (304
> response from server)?
> Thanks again ..
>
> Francesco
>
>>----Messaggio originale----
>>Da: ramotswa at gmail.com
>>Data: 16/02/2012 14.48
>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>Cc: <bamerbalazs at gmail.com>, <openlayers-users at lists.osgeo.org>
>>Ogg: Re: Re: Re: [OpenLayers-Users] Capture Tile information
>>
>>So if you had an OSM layer.
>>
>>Register an event on tileloaded on it
>> OSMM.events.register("tileloaded", function (e) {
>>                var myVar= e;
>>}
>>
>>and then somewhere in "myVar" you need to check if "olImageLoadError"
>>is present. One area could be myVar.element.childNodes[0].innerHTML
>>
>>for me that is:
>>"<img id="OpenLayersDiv77" style="position: relative; width: 256px;
>>height: 256px; " class="olTileImage olImageLoadError" src=....>"
>>
>>You can do a text comparison to find if olImageLoadError is in there
>>and report something back accordingly.
>>
>>I have not ever implemented this nor do I think it is a particularly
>>good solution, but it should do what you are after.
>>
>>Toby
>>
>>
>>
>>On 16 February 2012 13:08, francescoboccacci at libero.it
>><francescoboccacci at libero.it> wrote:
>>> Hi, can you tell me how look at the css class? can you explain it more
> clear?
>>> Can you write a simple example ?
>>> Thanks in advance...
>>>
>>> Francesco
>>>
>>>>----Messaggio originale----
>>>>Da: ramotswa at gmail.com
>>>>Data: 16/02/2012 14.02
>>>>A: "francescoboccacci at libero.it"<francescoboccacci at libero.it>
>>>>Cc: <bamerbalazs at gmail.com>, <openlayers-users at lists.osgeo.org>
>>>>Ogg: Re: Re: [OpenLayers-Users] Capture Tile information
>>>>
>>>>No I understand what you are trying to do, but you can,
>>>>programatically, look at the css class of every tile that comes in
>>>>apparently.
>>>>
>>>>On 16 February 2012 12:53, francescoboccacci at libero.it
>>>><francescoboccacci at libero.it> wrote:
>>>>> ye..with firebug i can see all requests .. but i'd like to capture the
>>> response
>>>>> from the server if i'm using the tile from my cache or from server(fresh
>>> tile).
>>>>> I don't know if is possible but it will be very interesting.Maybe we have
>>> to
>>>>> work into openlayers code. Thanks
>>>>>
>>>>> Francesco
>>>>>
>>>>>>----Messaggio originale----
>>>>>>Da: bamerbalazs at gmail.com
>>>>>>Data: 16/02/2012 13.38
>>>>>>A: <openlayers-users at lists.osgeo.org>
>>>>>>Ogg: Re: [OpenLayers-Users] Capture Tile information
>>>>>>
>>>>>>Hi Imran,
>>>>>>
>>>>>>> You can see your http request using FireBug, if you are using FireFox.
>>>>>>
>>>>>>Yes, but I thought a check during runtime from JavaScript. So that
>>>>>>instead of displaying pink tiles, I would write a message about the
>>>>>>problem with X layer.
>>>>>>
>>>>>>best regards: Balázs
>>>>>>_______________________________________________
>>>>>>Users mailing list
>>>>>>Users at lists.osgeo.org
>>>>>>http://lists.osgeo.org/mailman/listinfo/openlayers-users
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Users mailing list
>>>>> Users at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>>>>
>>>
>>>
>>
>
>
> _______________________________________________
> Users mailing list
> Users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/openlayers-users



-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.