[OpenLayers-Users] OpenLayers, syntax issue.

[Andreas Hocevar]

On Thu, Nov 24, 2011 at 8:21 PM, jns <jnsoak at gmail.com> wrote:
> Hi,
>
> I apologize if this isn't the correct forum for my sort of question. But I'm
> very new to this and I will however give it a try.
>
> This line of code will render the map just as it is supposed to do:
>
> map = new OpenLayers.Map({div: "map", controls: [geolocate], layers:
> [layer]});
>
> ... but shouldn't the following lines give me the same result?
>
> map = new OpenLayers.Map("map");
> map.addControl(geolocate);
> map.addLayer(layer);

These two are not 100% equivalent. The first one creates a map with
geolocate as its only control. The second one adds geolocate to the
default controls (Navigation, PanZoom, ArgParser, Attribution). If you
have a minified build that does not provide all of these default
controls, your application will fail before the map gets rendered.

The 100% equivalent of your first snippet would be

map = new OpenLayers.Map("map", {controls: []});
map.addControl(geolocate);
map.addLayer(layer);

Andreas.

>
> I thought they were equivalent to the above statement, but apparently not
> since no map is rendered. I use jQuery Mobile if it may make any differences
>
> Thanks,
> Jonas
>
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.