[OpenLayers-Users] pb with map.getZoom

[Christian Bleau]

Hi the pb is solved with this code.

variables map.getScale ( ); or getZoom  send a good information if it's  inside a function ..... 

	style = new OpenLayers.Style({
    	externalGraphic: 'http://pofableau.com/openlayer/calque.png',
    	graphicHeight: "${H1}",
    	graphicWidth: "${W1}"
    	},
    	{ context: { 
    		H1: function() { return 272/map.getScale()*2000;},
    		W1: function() { return 200/map.getScale()*2000;}    	
    		} }    	
		);
 
       var couche_calque = new OpenLayers.Layer.Vector("Calque", {
       styleMap: new OpenLayers.StyleMap(style) }
            );
       var feature = new OpenLayers.Feature.Vector(
       new OpenLayers.Geometry.Point(2.534904,48.387375).transform(
       new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
       new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
            	),
       {some:'data'}
            );
       couche_calque.addFeatures(feature);


http://pofableau.com/openlayer/multicouche.html


Many thanks for the help.

Christian



Le 19 juin 2012 à 16:52, Olivier Terral a écrit :

> Hi Christian,
> 
> You're doing a getZoom() just after created the map and before a zooming function, so the zoom property of the map is logically 0. 
> 
> Anyway, I think you use a wrong way of managing scale dependent size. 
> 
> Your problem seems similar to this example: http://dev.openlayers.org/releases/OpenLayers-2.11/examples/label-scale.html .
> 
> Hope this helps.
> 
> Tschuuss
> 
> Le 19 juin 2012 à 15:05, christian bleau a écrit :
> 
>> Hi, i'm just trying to use OL and I meet a problem with map.getZoom here's url of my test. for adapt an size of an OpenLayers.Layer.Vector and an externalGraphic I call a var zoom with map.getZoom line: 159 I call var z= map.getZoom(); for change the size of an image But they don't work "Error: Invalid value for  attribute height="Infinity" If I try to see the z'value Firebug give me "0" .....   Thank a lot if you have the solution I search it since two days. 
>> View this message in context: pb with map.getZoom
>> Sent from the OpenLayers Users mailing list archive at Nabble.com.
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> 
> Olivier Terral
> 
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Christian

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