[OpenLayers-Users] SelectFeature usage in OpenLayers 2.7
Christopher Schmidt
crschmidt at metacarta.com
Fri Jan 30 08:34:51 EST 2009
On Fri, Jan 30, 2009 at 06:40:56PM +0530, Subha Ramakrishnan wrote:
> Hi
>
> I am using Openlayers with mapserver and recently upgraded to Openlayers
> 2.7.
> From the documentation and the mail archive, I found that there is a
> change with this control from 2.6 to 2.7.
>
> I've a vector layer with multiple points on it. And for every point i
> add a selectFeature to show a pop up on clicking it.
> The problem here is the z-index of the layer. The moment i add the first
> selectFeature to the layer, the z-index goes up to "725" from some value
> in 300 range. Then with every control's activate call
> [selectControl.activate()], the z-index of the layer increases by 1 and
> it goes beyond 750, resulting in problems with displaying pop up.
>
> This is my code:
>
> var point = new
> OpenLayers.Geometry.Point(parseFloat(loc1),parseFloat(loc2));
> var pointFeature = new OpenLayers.Feature.Vector(point);
> vectorLayer.addFeatures([pointFeature]);
> selectControl = new OpenLayers.Control.SelectFeature(vectorLayer,
> {onSelect: onPointSelect, onUnselect: onPointUnselect,toggle : true});
> map.addControl(selectControl);
> selectControl.activate();
>
> Am i doing something wrong here?
> Is there any other way to show a pop up on clicking the point?
There is no need to register a selectFeature control per point. Instead,
register a single selectFeature control for the layer.
This is demonstrated in:
http://openlayers.org/dev/examples/select-feature-openpopup.html
http://openlayers.org/dev/examples/sundials-spherical-mercator.html
It is also documented as pat of a tutorial in:
http://docs.openlayers.org/library/overlays#displaying-popups
Regards,
--
Christopher Schmidt
MetaCarta
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