Re: Changing map view ...

Thanks Don!

Had the foll inserts into the
HelloWorldLayer code :

  Iterator it = getBeanContext().iterator();
  MapBean mapBean = null;
  Object someObj;
  while (it.hasNext()) {
   someObj = it.next();
    if (someObj instanceof MapBean) {
        Debug.message("found a MapBean.");
        mapBean = (MapBean)someObj;
    }
  }
  mapBean.setCenter(new LatLonPoint(43.0f, -95.0f));
  
There was a Null Pointer exception, until
I realised that I had to set the "addToBeanContext"
property for the layer in the properties file ...

Regards,
Pradeep.

--
On Fri, 22 Jun 2001 10:18:18  
 Don Dietrick wrote:
>Hi Pradeep,
>
>Have the layer use the BeanContext to get a handle to the MapBean, and
>change the projection there.  The MapBean will fire the ProjectionEvent.
>
>- Don
>
>PRADEEP RAMACHANDRAN wrote:
>> 
>> Hello,
>> 
>> Is there a mechanism in place by which a layer can fire a ProjectionEvent, if so how do I implement it in a Layer.
>> 
>> The idea is that a layer would collect lat/lon data in the background and later render graphic objects at these lat/lon positions. There would be a second political layer that would serve as a background.
>> 
>> When the first layer completes reading the set of data,it should trigger a projection change ( a recenter )for the political background map to an area that has a maximum density of the graphic objects.
>> 
>> Thanks,
>> Pradeep.
>> 
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