GoogleMaps V3 KML PlaceMark StyleURL changer

Question

Je travaille actuellement avec l'API GoogleMaps V3. Et je charge le KML suivant:

<?xml version="1.0" encoding="UTF-8"?> 
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom"> 
<Document><Style id="red"> 
    <LineStyle> 
    <color>e2001aFF</color> 
    <width>1</width> 
    </LineStyle> 
    <PolyStyle> 
    <color>e2001acc</color> 
    <fill>1</fill> 
    </PolyStyle> 
    <BalloonStyle> 
    <bgColor>ffffffff</bgColor> 
    <text> 
          &lt;font font size='3' color="#aa0000"&gt;&lt;b&gt;$[name]&lt;/b&gt;&lt;/font&gt; 
          &lt;table border='1' padding='1'&gt;$[description]&lt;/table&gt;     
         </text> 
    </BalloonStyle> 
</Style><Style id="gray"> 
    <LineStyle> 
    <color>666666FF</color> 
    <width>1</width> 
    </LineStyle> 
    <PolyStyle> 
    <color>cccccccc</color> 
    <fill>1</fill> 
    </PolyStyle> 
    <BalloonStyle> 
    <bgColor>ffffffff</bgColor> 
    <text> 
          &lt;font font size='3' color="#aa0000"&gt;&lt;b&gt;$[name]&lt;/b&gt;&lt;/font&gt; 
          &lt;table border='1' padding='1'&gt;$[description]&lt;/table&gt;     
         </text> 
    </BalloonStyle> 
</Style><name>KML</name><Placemark id="5473"> 
    <Snippet maxLines="0"></Snippet> 
    <name></name> 
    <description></description> 
    <visibility>1</visibility> 
    <open>0</open> 
    <Polygon> 
    <extrude>1</extrude> 
    <tessellate>1</tessellate> 
    <altitudeMode>clampedToGround</altitudeMode> 
    <outerBoundaryIs> 
     <LinearRing> 
     <coordinates>5.54377026975101,51.6529393188121,0 5.54235383140039,51.6401639644859,0 5.53873941603147,51.6354393533086,0 5.53313983380098,51.6352371598686,0 5.53109711126943,51.6324409224198,0 5.52737786126051,51.6324813956187,0 5.52260612519502,51.6307520918321,0 5.51872075256068,51.6322363340599,0 5.51736992027453,51.6316246096909,0 5.51484051209933,51.6325529212478,0 5.51142301311675,51.6346650281583,0 5.51056937640636,51.6341534949811,0 5.50849516823445,51.634713720177,0 5.50639250193852,51.6343571115019,0 5.50606525074908,51.6362594682684,0 5.49722704729733,51.6265043908797,0 5.46737140246617,51.6425173978967,0 5.42182366459901,51.6543409225039,0 5.42437999474141,51.6560175383335,0 5.42661087246537,51.6554954605812,0 5.43004089768112,51.6592736942533,0 5.43163811861903,51.6609457181974,0 5.43165069241378,51.6634400858201,0 5.43400899528993,51.6642654325698,0 5.43709542035706,51.6646638722533,0 5.44492487842012,51.6642912329926,0 5.44573674258826,51.6661636919472,0 5.4489840685884,51.6698962431202,0 5.45900781447863,51.6917003092576,0 5.4607098223104,51.6897436062354,0 5.46973551245956,51.6895883044489,0 5.46923994357604,51.6914530469315,0 5.4707388732589,51.691761698608,0 5.47831558751497,51.7015861823258,0 5.48458009605862,51.7018910935235,0 5.49211917579361,51.7059403621055,0 5.50347583796229,51.6934008340147,0 5.50205171042708,51.6901914509596,0 5.49762079494402,51.6850245556145,0 5.49108009295296,51.6774498385961,0 5.48603420879267,51.6715509606335,0 5.50117534805849,51.6655353570913,0 5.50085686840637,51.6595932268782,0 5.51334569323478,51.6586174823159,0 5.52070245822274,51.6631783875663,0 5.52147513937071,51.6732045469624,0 5.53323861625654,51.66639133756,0 5.54377026975101,51.6529393188121,0 </coordinates> 
     </LinearRing> 
    </outerBoundaryIs> 
    </Polygon> 
    <styleUrl>#red</styleUrl> 
</Placemark></Document></kml> 

Ce que je wan't pour atteindre est de changer la couleur d'un gris sur marqueur de position, cliquez sur le indicateur d'emplacement.

Je suis capable d'attraper l'événement click, mais je ne peux pas trouver comment changer le style après le chargement:

google.maps.event.addListener(_kml_layer, "click", function(obj) { 
     alert(obj.featureData.id); 
    }); 

Le _kml_layer est défini par la fonction suivante:

_kml_layer = new google.maps.KmlLayer(
        'http://www.mydomain.com/mykml.kml', 
        { 
         suppressInfoWindows : true, 
         map : _map 
        }); 

Answer 1

Avec KmlLayer vous ne pouvez pas changer le style après le chargement (avec l'API comme documenté actuellement). Vous devez soit créer un second KmlLayer avec le nouveau style et le charger, soit utiliser un analyseur kml tiers (comme geoxml3 ou geoxml_v3) qui convertit kml en objets api google maps natifs, que vous pouvez modifier.

geoxml3: http://code.google.com/p/geoxml3/

Voici un exemple d'utilisation geoxml3 qui change deux des trois icônes de repère sur mouseover: http://www.geocodezip.com/geoxml3_test/v3_geoxml3_kmltest_stylemap_marker.html?filename=http://www.geocodezip.com/geoxml3_test/rollover_kml.xml

geoxml_v3: http://code.google.com/p/geoxml-v3/

Une autre option serait d'utiliser un FusionTablesLayer, qui peut être dynamiquement stylé et qui peut être peuplé à partir de kml