Hi.
I use this function to locate geometry on map
OpenLayers.Map.prototype.locate = function(geometry, panOnly) {
var bounds = geometry.getBounds();
//this.zoomToExtent(bounds);
//this.zoomToScale(scale);
if ((this.getExtent().containsBounds(bounds) ||
this.getZoomForExtent(bounds) > this.zoom) || panOnly) {
//wrong for complex LineStrings (points to the center
of the extent - not
center of the geometry)
//this.panTo(bounds.getCenterLonLat());
//incorrect with current implemetation of
Geometry.Collection GetCentroid
//this.panTo(WEM.Util.point2ll(geometry.getCentroid()));
var parser = new OpenLayers.Format.WKT();
//this works - BUT! I need to send all geometry WKT
to the server
//server (MapServer mapscript c# via webservice
webmetod) getCentroid works perfectly
application.server.MapParser.GetCentroid(parser.write(geometry),
function(geometryWKT, scope) {
scope.panTo(WEM.Util.point2ll(parser.read(geometryWKT).geometry));
}, null, this);
}
else {
var zoom = this.zoom;
this.zoomToExtent(bounds);
this.zoomTo(zoom);
}
};
What's this (for ex. for LineString)???
/**
* APIMethod: getCentroid
*
* Returns:
* {<OpenLayers.Geometry.Point>} The centroid of the collection
*/
getCentroid: function() {
return this.components.length && this.components[0].getCentroid();
//just great)))(((!
}
Currently I can:
- pass only featureId to the server (not all geometry text)
- get centroid forcibly on server on querying features and then use it
- compress geometry WKT with JavaScript lib (deflate) and decompress on
server as I do it on update feature....
But I want correct getCentroid implemetation
--
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