[OpenLayers-Dev] 'changelayer' event + map zoom

[Andreas Hocevar]

How would your map know which extent you want to zoom to? Your code
would only work if your base layer changes, and the base layer was
configured with a different maxExtent than the previous one.

To do what you want, you need to do something like

map.zoomToExtent(evt.layer.maxExtent);

which only works if you have configured your layers with a maxExtent.

On Thu, Jan 12, 2012 at 4:10 PM, Grzegorz Kurzejamski
<grzegorz.kurzejamski at lingaro.com> wrote:
> Hi,
>
> I've been wondering, how is that, that after firing that piece of code:
>
> map.events.register('changelayer', null, function(evt)
> {
>  if(evt.layer.visibility==true)
>  {
>   map.zoomToMaxExtent()
>  }
> }
> );
>
> ...zoom doesn't affect the view.
> I've got few layers in my map, with standard layer switcher. Those are
> completely different graphs, so when I change layer, I want to zoom it to
> maximum extent. When I put some alert(); just after zoom function i can see,
> that when the alert is fired - layer is already changed and certainly zoomed
> to "MaxExtent" . After alert closure, layer pans to bounding box before
> layer switching.
>
> After few hours of net digging, I decided to post here.
> Hope someone can help :).
>
> --
> View this message in context: http://osgeo-org.1803224.n2.nabble.com/changelayer-event-map-zoom-tp7180553p7180553.html
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.