Loading of nodes into variables

[AS3_Learning_Curve]

I'm just testing out loadermax and I can get images loading no problem at all. I wish to load some nodes from an xml file into memory and assign the values of the xml file into variables. This is what I have so far.

 

//create a LoaderMax named "mainQueue" and set up onProgress, onComplete and onError listeners
var queue:LoaderMax = new LoaderMax({name:"mainQueue", onProgress:progressHandler, onComplete:completeHandler, onError:errorHandler});

//append several loaders
queue.append( new XMLLoader("planets.xml", {name:"xmlDoc", noCache:1}) );

//start loading
queue.load();

function progressHandler(event:LoaderEvent):void {
   trace("progress: " + event.target.progress);
}

function completeHandler(event:LoaderEvent):void {

 trace(event.target + " is complete!");
}

 

I can get the xml file to load and the progress handler says it has loaded fine. Now here comes the million dollar question. Home do I then load the access the loaded xml file to put a node into a variable. Lets say for instance that I wish to put the node 250.0 into avariable distance. Sorry to ask such fundamental question but this would allow a me to continue with my project. As you can guess I wish to populate some variables with distances of planets etc. A simple example would be great with how to access the node within the xml and trace out the value.

 

Any input would be great. Thanks people.

 

 

This is a sample of my xml file named planets.xml

 

<?xml version="1.0" encoding="UTF-8" ?> 



Test




Xtml




Mars
250.0
Miles

 

Many thanks.

[Carl]

what you need to do is a bit of reading on E4X which is what AS3 uses to search and access any type of xml data.

 

I created an xml file that looks like this:

 

Earth
1



mars
1.03



jupiter
.41

 

 

and I built a small example that illustrates the various ways of parsing that data:

import com.greensock.*;
import com.greensock.events.LoaderEvent;
import com.greensock.loading.XMLLoader;

var myPlanets:XMLLoader = new XMLLoader("planetData.xml", {onComplete:getXML});

myPlanets.load();


function getXML(e:LoaderEvent):void{
var loadedXML:XML = myPlanets.content as XML;

trace("this is all the xml");
trace(loadedXML);

//create an XMLList of just the planet nodes
var planetsXML:XMLList = loadedXML..planet;



trace("\n\nplanets XMLList");
trace(planetsXML);

trace("\n\nall the name nodes")
trace(planetsXML.name);

trace("\n\nthe name of the first planet")
trace(planetsXML[0].name);

trace("\n\nthe rotation of the second planet")
trace(planetsXML[1].rotation);


trace("\n\nthere are this many planets");
trace(planetsXML.length());

trace("\n\nloop through the name and rotation of all planets")
for(var i:uint = 0; i		trace(planetsXML[i].name + " : " + planetsXML[i].rotation);
	} 


trace("\n\nget jupiter's rotation");
trace(planetsXML.(name=="jupiter").rotation);


}	

 

 

the above code will output the following:

this is all the xml



Earth
1


mars
1.03


jupiter
.41





planets XMLList

Earth
1


mars
1.03


jupiter
.41



all the name nodes
Earth
mars
jupiter


the name of the first planet
Earth


the rotation of the second planet
1.03


there are this many planets
3


loop through the name and rotation of all planets
Earth : 1
mars : 1.03
jupiter : .41


get jupiter's rotation
.41

 

I strongly recommend reading this E4X Tutorial http://www.republicofcode.com/tutorials/flash/as3xml/

 

...ignore the loading part as XMLLoader makes it much easier, but do read the "processing the xml" section.

[Carl]

oh and for your example to get the value inside of: 250.0 just do

 

function completeHandler(event:LoaderEvent):void {

 trace(event.target + " is complete!");

 var planetsXML:XML = LoaderMax.getContent("planets.xml");

 trace(planetsXML..item[0].valuedec);
}	

[AS3_Learning_Curve]

Carl,

 

I thank you for your time and efforts in making it clearer to me many thanks.

 

If I wished to have the following in the xml

Earth

1

 

Star1

150

 

Could you please let me know the correct way to call group 1 star span figure.

 

Would it be trace(planetsXML..group1.item[0].span);

 

Thanks.

[Carl]

actually i think it would be

 

trace(planetsXML..group1.span);