[OpenLayers-Users] chenge style with zoom level

[Luca Delucchi]

Hi list, i'm newbye about this list. I'm trying to change the
pointRadius in my style when a change the zoom level, i read this [0]
but nothing change. i try a lot of  solution here:

###first solution like the mailing list

       var zumLevel;

        map.events.register('zoomend', map, function(e){
                zumLevel=map.getZoom()+5;
        });

        var CH_vend = new OpenLayers.Layer.WFS("Chardonnay indice vendemmia",
"http://10.0.101.11/cgi-bin/mapserv?map=/home/gis/mapserver/wfs_previsione_indici.map";,
{typename: "CH_ind", maxfeatures: 1000}, {extractAttributes: true,
        styleMap: new OpenLayers.StyleMap({
                strokeColor: "#00FF00",
                strokeOpacity: 1,
                strokeWidth: 4,
                fillColor: "#FFFFFF",
                fillOpacity: 0.5,
                pointRadius: "${radius}",
                pointerEvents: "visiblePainted",
                label : "${vend_avg}",
                
                fontColor: "#000000",
                fontSize: "12px",
                fontFamily: "Courier New, monospace",
                fontWeight: "bold",
                labelAlign: "cm"
        }, {
                context: {
                        radius: function(){
                                return zumLevel;
                        }
                }
        }
        )});

### second solution, the color change but the size not change

       var zumLevel, textLevel;

        var brix_context = {
                getScolor: function(feature) {
                if (feature.attributes.id_vitigno=="CH"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="MB"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="MG"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="IM"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="MT"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="NO"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="PB"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="PG"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="PV"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="TA"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="TR"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="VE"){
                        scolor='#EEC900';
                } else if (feature.attributes.id_vitigno=="VT"){
                        scolor='#EEC900';
                } else {
                        scolor='#B23AEE';
                };
                return scolor;
                },
                brixavg: function(feature) {
                        return feature.attributes.brix_avg;
                },
                radius: function(){
                        map.events.register('zoomend', map, function(e){
                                zumlevel=map.getZoom()+5;
                                return zumLevel;
                        });
                },
                testo: function(){
                        map.events.register('zoomend', map, function(e){
                                textlevel=map.getZoom();
                                testolevel=textLevel.toString()+"px"
                                return testolevel;
                        });
                },
        };

        var brix_template = {
                fillColor:"#FFFFFF",
                fillOpacity: 0.5,
                strokeColor: "${getScolor}",
                strokeWidth: 4,
                strokeOpacity: 1,
                pointRadius: "${radius}",
                pointerEvents: "visiblePainted",
                label : "${brixavg}",
                
                fontColor: "#000000",
                fontSize: "${testo}",
                fontFamily: "Courier New, monospace",
                fontWeight: "bold",
                labelAlign: "cm"
        };

        var brix_style = new OpenLayers.Style(brix_template, 
{context:brix_context});

        var brix = new OpenLayers.Layer.WFS("Brix previsti a oggi",
"http://10.0.101.11/cgi-bin/mapserv?map=/home/gis/mapserver/wfs_previsione_indici.map";,
{typename: "Indici_vendemmia", maxfeatures: 1000}, {extractAttributes:
true, visibility: false,        styleMap: new
OpenLayers.StyleMap(brix_style)});

someone can help me?

thanks
Luca

[0] http://www.mail-archive.com/users@openlayers.org/msg07140.html
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