AW: [OpenLayers-Users] Zooming to center of a KML layer after loadingit - request for assistance

[Arnd Wippermann]

Hi,
 
register "loadend" for your layer:
 
MyKML .events.register("loadend", MyKML , function (e) {
    map.zoomToExtent(MyKML .getDataExtent());
});

by the way, does your styleMap work for the kml layer, if you set
extractStyles to true?
 
Arnd

 
  _____  

Von: openlayers-users-bounces at lists.osgeo.org
[mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Andres
Deparis
Gesendet: Donnerstag, 7. Juli 2011 08:31
An: openlayers-users at lists.osgeo.org
Betreff: [OpenLayers-Users] Zooming to center of a KML layer after loadingit
- request for assistance


Hello everyone,

I am trying to be able to zoom or Pan (zooming first) to the center of the
data from my kml file that I load periodically. But, in my case, I can load
the data (which consist of one point at this moment) and then of course to
be able to center to that point. I have searched and found out that perhaps
my method does not work because I am zooming into the data but not waiting
for the data to be fully loaded.

Below is my piece of code. Thank you in advance for the advice.

Andres D.P

var map;

function init() {
    

       map = new OpenLayers.Map({
        div: "map",
        //projection: new OpenLayers.Projection("EPSG:900913"),
        units: "m",
        maxResolution: 156543.0339,
        maxExtent: new OpenLayers.Bounds(
                 119.715815, -0.771406, 97.637881  ,7.640186
        )
,panDuration: 250    });

 styleMap = new OpenLayers.StyleMap({'default':{
                        //label : "${th}",
                        label : "MYdog",
                        fontColor: "${fontColor}",
                        fontSize: "16px",
                        labelAlign: "${labelAlign}",
                        pointRadius: 2,
                        labelXOffset : 0,
                        labelYOffset : 20
                    }});

        var osm = new OpenLayers.Layer.OSM();
        //var vlayer = new OpenLayers.Layer.Vector( "Editable" );
        var MyKML = new OpenLayers.Layer.GML("KML", "dog.kml", 
               {
                projection: new OpenLayers.Projection("EPSG:4326"),
                //displayProjection: new
OpenLayers.Projection("EPSG:900913"), 

                format: OpenLayers.Format.KML, 
                formatOptions: {
                  extractStyles: true, 
                  extractAttributes: true,
                  maxDepth: 1
                },
                styleMap: styleMap
               });
               
   map.addLayers([osm, MyKML]);
   map.addControl(new OpenLayers.Control.PanZoomBar());
   map.addControl(new OpenLayers.Control.Navigation({dragPanOptions:
{enableKinetic: true}}));
   map.addControl(new OpenLayers.Control.LayerSwitcher());   
   
//    map.addControl(new OpenLayers.Control.MouseToolbar());
//    map.addControl(new OpenLayers.Control.Navigation());
//    map.addControl(new OpenLayers.Control.LayerSwitcher());
//    map.addControl(new OpenLayers.Control.PanZoom());
//    map.addControl(new OpenLayers.Control.EditingToolbar();
//    map.addControl(OpenLayers.Control.EditingToolbar(vlayer));
     

    map.setCenter(new OpenLayers.LonLat(101.587411,
3.021547).transform(new OpenLayers.Projection ("EPSG:4326"),
map.getProjectionObject()
), 
15); 

 
//map.zoomToExtent( MyKML.GetExtent() );

window.setInterval(raingaugeRefreshData, 10000, MyKML);


}

function raingaugeRefreshData(layer)
{
//setting loaded to false unloads the layer//

                
                layer.loaded = false;
                //setting visibility to true forces a reload of the layer//
                layer.setVisibility(true);
                //the refresh will force it to get the new KML data//
                layer.setUrl('MyDOG.kml?_salt='+Math.random());
                //- <3 from Thqr -//
         map.zoomToExtent( MyKML.maxExtent );
        
                         
                
}

 















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