Re: [Gwt-openlayers-users] Adding Map Event Handlers ...

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I have numerous changes to make to a (rather over complicated) GIS
application
The policy has been to leave the GWT-OpenLayers code untouched and to create
yet another layer on top in which we handle all the non-standard stuff.
In this case do you think I would be useful for me to add a new handler into
the GWT-OpenLayer code?

The pure OL JavaScript approach is as follows:

<html>  <head>
    <script type="text/javascript" src="
http://openlayers.org/api/OpenLayers.js"></script>
  </head>
  <body onload="loadmap();">
    <script type="text/javascript">

function centre(evt, map){
        var newCenter = map.getLonLatFromViewPortPx( evt.xy );
        map.setCenter(newCenter);
}
       function loadmap(){
        //basic setup
        var map = new OpenLayers.Map('map');
        var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS", "
http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
        map.addLayer(wms);
        if (!map.getCenter()) map.zoomToMaxExtent();

        //Create handler
        var dblclick = new OpenLayers.Handler.Click(this, {
       dblclick:function(evt) { centre(evt, map); } },
       {'double': true,
       stopDouble: true});

        //Fix up the missing map reference
        dblclick.setMap(map);

        //Activate in correct order
        dblclick.activate();
      }
    </script>

   <div style="width:1000px; height:500px; border: 1px blue solid;"
id="map"></div>
    <div id="eventlog"></div>
  </body>
</html>

Ken

Re: [Gwt-openlayers-users] Adding Map Event Handlers ...

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Re: [Gwt-openlayers-users] Adding Map Event Handlers ...