[OpenLayers-Dev] vector labels - almost there!

[Zer]

Hello,

After some more investigation, I found out that I had to add the changes in
these files too. And now it works almost fine! There is  oe issue regarding
removing of vectors. I call the destroyFeatures() function on a vector
layer. The vetctor objects are removed from the map, but the labels are are
not removed. Does anyone know what, and where, to add in the code to destroy
them?


Thanks,

-Z


sandbox/camptocamp/text/lib/OpenLayers/Geometry/Point.js
r5614 	r7005 	 
173	173	     
174	174	    /** 
 	175	     * APIMethod: getCentroid 
 	176	     * 
 	177	     * Returns: 
 	178	     * {<OpenLayers.Geometry.Point>} The centroid of the collection 
 	179	     */ 
 	180	    getCentroid: function() { 
 	181	        return new OpenLayers.Geometry.Point(this.x, this.y); 
 	182	    }, 
 	183	     
 	184	    /** 
175	185	     * APIMethod: intersects 
176	186	     * Determine if the input geometry intersects this one. 





sandbox/camptocamp/text/lib/OpenLayers/Geometry/LinearRing.js
r5673 	r7005 	 
197	197	        } 
198	198	        return area; 
 	199	    }, 
 	200	     
 	201	    /** 
 	202	     * APIMethod: getCentroid 
 	203	     * 
 	204	     * Returns: 
 	205	     * {<OpenLayers.Geometry.Point>} The centroid of the collection 
 	206	     */ 
 	207	    getCentroid: function() { 
 	208	        if ( this.components && (this.components.length > 2)) { 
 	209	            var sumX = 0.0; 
 	210	            var sumY = 0.0; 
 	211	            for (var i = 0; i < this.components.length - 1; i++) { 
 	212	                var b = this.components[i]; 
 	213	                var c = this.components[i+1]; 
 	214	                sumX += (b.x + c.x) * (b.x * c.y - c.x * b.y); 
 	215	                sumY += (b.y + c.y) * (b.x * c.y - c.x * b.y); 
 	216	            } 
 	217	            var x = sumX / (6 * Math.abs(this.getArea())); 
 	218	            var y = sumY / (6 * Math.abs(this.getArea())); 
 	219	        } 
 	220	        return new OpenLayers.Geometry.Point(x, y); 
199	221	    }, 
200	222	     



#
#
sandbox/camptocamp/text/lib/OpenLayers/Geometry/Collection.js
r5614 	r7005 	 
231	231	        return area; 
232	232	    }, 
 	233	     
 	234	    /** 
 	235	     * APIMethod: getCentroid 
 	236	     * 
 	237	     * Returns: 
 	238	     * {<OpenLayers.Geometry.Point>} The centroid of the collection 
 	239	     */ 
 	240	    getCentroid: function() { 
 	241	        var centroid = this.components[0].getCentroid(); 
 	242	        return centroid; 
 	243	    }, 
233	244	 
234	245	    /** 

 

Arnd Wippermann wrote:
> 
> Hi,
> 
> i would also like to display labels on a map. I have tried using
> OpenLayers.Popup to do this. It seems to work. The labels could be moved
> after creating, but after zooming the position will new calculated to
> default values via OpenLayers.Popup. I have no idea, how to prevent this.
> 
>  http://gis.ibbeck.de/ginfo/apps/OLExamples/OL26/examples/labels.html
> http://gis.ibbeck.de/ginfo/apps/OLExamples/OL26/examples/labels.html 
> 
> Arnd Wippermann
> http://gis.ibbeck.de/ginfo
> 

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