We are using GWT and OpenLayers in several projects making use of the
JSNI.
Until now we could use simple Openlayers js function such as Zoom. It
was clear to me that to use a zoom using JSNI I have to do :
private static native void _zoomTo(JavaScriptObject map, int
zoomLevel) /*-{
map.zoomTo(zoomLevel);
}-*/;
I could do a lot with this simple methods. But now, as complexity is
increasing I would need to use more complex feature of Openlayers.
For example what would be the smartest way to apply those settings to
my map so I can detect double click and get the event to my gwt
application :
<script src="../OpenLayers.js"></script>
<script type="text/javascript">
OpenLayers.Control.Click = OpenLayers.Class
(OpenLayers.Control, {
defaultHandlerOptions: {
'single': false,
'double': true,
'pixelTolerance': 0,
'stopSingle': false,
'stopDouble': false
},
initialize: function(options) {
this.handlerOptions = OpenLayers.Util.extend(
{}, this.defaultHandlerOptions
);
OpenLayers.Control.prototype.initialize.apply(
this, arguments
);
this.handler = new OpenLayers.Handler.Click(
this, {
'click': this.trigger
}, this.handlerOptions
);
},
trigger: function(e) {
var lonlat = map.getLonLatFromViewPortPx(e.xy);
alert("You clicked near " + lonlat.lat + " N, " +
+ lonlat.lon + " E");
}
});
var map;
function init(){
map = new OpenLayers.Map('map');
var click = new OpenLayers.Control.Click();
map.addControl(click);
}
</script>
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