Re: [Gwt-openlayers-users] beginner question: TMS custom url

[Edwin C. <com...@gm...>]

Hi Ricky,

If getURL is not a parameter on TMSOptions and you do need it, then
you could try to do it like this:

TMSOptions options = new TMSOptions();
...
options.getJSObject().setProperty("getURL", "yourURL"); //the way to
set properties if there is not yet a setter method

or subclass TMSOptions yourself and create a setter for getURL.

If it works, I would be most happy to incorporate any enhancements to
TMS in the GWT-OL codebase.

Greetings,
Edwin

P.S. I am not a TMS user but, in the example provided at the url below
(tilepyramider stuff) the getURL is not specified:
http://code.google.com/p/cumberland/wiki/TilePyramiderAndOpenLayers


2009/10/6 ricky chen <clo...@gm...>:
> Hi Edwin,
>
> thank you very much for your reply.
>
> I am not familiar with OpenLayers in general (but am looking to use it
> in place of google maps). I'll do my best to explain, please bear with
> me:
>
> in javascript, i have an example (the generated openlayers html from
> maptiler http://www.maptiler.org/) defining custom layer as
> <code>
> var tmsoverlay = new OpenLayers.Layer.TMS( "TMS Overlay", "",
>  {serviceVersion: '.', layername: '.', alpha: true,
>   type: 'png', getURL: overlay_getTileURL,
>   isBaseLayer: false});
> map.addLayer(tmsoverlay);
> </code>
>
> notice how one of the parameters passed in is "getURL: overlay_getTileURL"?
> that is actually a function defining how tile URLs are worked out
> <code>
> function overlay_getTileURL(bounds) {
>  bounds = this.adjustBounds(bounds);
>  var res = this.map.getResolution();
>  var x = Math.round((bounds.left - this.tileOrigin.lon) / (res *
> this.tileSize.w));
>  var y = Math.round((bounds.bottom - this.tileOrigin.lat) / (res *
> this.tileSize.h));
>  var z = this.map.getZoom();
>  var path = this.serviceVersion + "/" + this.layername + "/" + z +
> "/" + x + "/" + y + "." + this.type;
>  var url = this.url;
>  if (mapBounds.intersectsBounds( bounds ) && z >= mapMinZoom && z <=
> mapMaxZoom){
>    // console.log( this.url + z + "/" + x + "/" + y + "." + this.type);
>    out.write(this.url + z + "/" + x + "/" + y + "." + this.type);
>    return this.url + z + "/" + x + "/" + y + "." + this.type;
>  } else {
>    return "http://www.maptiler.org/img/none.png";
>  }
> }
> </code>
>
> so i was looking for some way to provide this tile URL logic when
> experimenting with gwt-openlayers. I can see it takes an URL before
> the TMSOption argument (as you've pointed out) but i'm not sure how
> that URL is resolved for individual tiles?
>
> thanks,
> ricky
>
> On 10/5/09, Edwin Commandeur <com...@gm...> wrote:
>> Hi Ricky,
>>
>> I am not sure I understand the question fully ( I don't work with TMS
>> layers myself ), but as far as I can see the url needs to be specified
>> in the constructor of the TMS layer as a seperate argument (before the
>> TMSOptions argument)
>>
>> Greetings,
>> Edwin
>>
>> 2009/10/5 ricky chen <clo...@gm...>:
>>> hi there,
>>>
>>> I have a question about defining custom URL when adding a TMS layer to
>>> the map (I am emailing you guys as instructed by
>>> http://sourceforge.net/projects/gwt-openlayers/support)
>>>
>>> when I look at general openlayers tutorial that work with custom
>>> overlays, they do so by specifying an URL for getting tiles within
>>> TMSOptions (a function that maps lat/lng to URL of tile), however I
>>> don't see an equivalent in java class - there is TMSOptions but I'm
>>> not sure how to provide a custom URL for different lat/lng.
>>>
>>> Are custom URLs for TMS supported by GWT Openlayers?
>>> Thanks heaps,
>>> Ricky
>>>
>>
>