I'm working on a similar feature right now. If you are trying to do this on a WMS layer, WMS supports a GetFeatureInfo. Possible limitations: 1. It requires a click, not a hover. 2. This roundtrips to the server rather than doing a quick in-memory thing 3. Your target is a single pixel if you are dealing with point data. If you are rendering it as a 20 pixel circle, the center point is the only thing that will trigger the GetFeatureInfo request.
WMS combines all layers into a flat sea of undifferentiated pixels. For hovering, the app can't tell the difference between a city point and the base layer it sits upon. We're pulling items like this out of the base layer and into a Marker layer. Currently (OpenLayers 2.4) you have a couple of options for this: 1. Programmatically add each feature via the API 2. Add a Boxes layer 3. Add a Text layer (tab separated values) 4. Add a GeoRSS layer <http://trac.openlayers.org/wiki/Documentation> has more info on these. Once these elements are features, you should be able to detect a hover and pop up your tooltip. I'm anxiously awaiting GeoJSON support -- it's coming to both OpenLayers and GeoServer soon, but it's not here today. HTH, s Scott Davis [EMAIL PROTECTED] On Aug 16, 2007, at 6:14 AM, Carlos Fernando Gonçalves wrote: > Hi list. > Help me. > I would like to know if he is possible to use Mouseover in > openlayers to representing the text you want shown inside the tip? > The system with openlayers needs to show the name of the cities > when an user to pass with mouse on the map. > > > Best regards, > Carlos FG > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
