Vector functions of z-indexing vector images

Question

Im having a hard time trying to understand the z-indexing of vector functions.

When I searched the Internet for information, I found these links: http://openlayers.org/dev/examples/ordering.html http://osgeo-org.1803224.n2.nabble.com/Bug-in-using-graphicZIndex -td2648665.html as well as http://osgeo-org.1803224.n2.nabble.com/graphicZIndex-of-vector-features-td3919627.html

What I did was customize the styles as shown in the first link:

 this.vectorsLayer = new OpenLayers.Layer.Vector("Vectors", {
                styleMap: new OpenLayers.StyleMap({
                    "default": {
                    'strokeColor': "#ff9933",
                    'strokeWidth': 5
                    },
                    "select": {
                        'strokeColor': "#3399ff"
                    }
                })
            }
        );
    this.carsLayer = new OpenLayers.Layer.Vector("Cars", {'rendererOptions': {yOrdering: false, zIndexing: true}});

     this.startIconStyle = {'externalGraphic':this.startIconUrl};

     this.parkIconStyle = {'externalGraphic':this.parkIconUrl};

     this.endIconStyle = {'externalGraphic':this.endIconUrl};

     this.defaultStyles = {
             //'label':getLabel(),
             'graphicZIndex':745,
            'graphicXOffset':-13,
            'graphicYOffset':-41,
            'graphicWidth':26,
            'graphicHeight':41,
            'strokeLinecap':'round',
            'strokeColor':"#000000",
            'strokeWidth':2,
            'strokeOpacity':1,
            'fillOpacity':1}
        //style of path that car has used 
    this.drivedStyle = {
            'strokeWidth': 3,
            'strokeOpacity': 1,
            'strokeColor': "#3399ff",
            'strokeDashstyle': "dash"
        }

And when I create the markers, I do it like this:

var routePoint = this.points[this.routePos].clone();
var newstyleSite = OpenLayers.Util.extend(this.startIconStyle, this.defaultStyles ,OpenLayers.Feature.Vector.style['default']);
this.routePointFeature = new OpenLayers.Feature.Vector(routePoint, {}, newstyleSite);
this.vectorsLayer.addFeatures(this.routePointFeature);

And when I look at the z-index of this marker - the z-index is set to auto not 745, which is in this.defaultStyles.

... , , .

this.routePointFeature.attributes.zIndex = 745; 

. , , -, /.

z-? ? ? - ?

: . , opelayers - . , , , , ?

Answer 1

z- .

this.vectorsLayer = new OpenLayers.Layer.Vector("Vectors", {
  styleMap: <your style map>,
  rendererOptions: { zIndexing: true }
});

, OpenLayers.Util.extend , (.. , , ). , jQuery.extend OpenLayers.Util.extend:

OpenLayers.Util.extend(this.startIconStyle, OpenLayers.Feature.Vector.style['default'] );
OpenLayers.Util.extend( this.startIconStyle, this.defaultStyles );

jQuery.extend( this.startIconStyle, OpenLayers.Feature.Vector.style['default'], this.defaultStyles );

.startIconStyle, this.startIconStyle, OpenLayers.Feature.Vector.style ['default'] this.defaultStyles.

:

var newstyleSite = {};
jQuery.extend( newstyleSite,  OpenLayers.Feature.Vector.style['default'], this.defaultStyles, this.startIconStyle );